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[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_handler.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 only,
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License
17  * version 2 along with this program; If not, see
18  * http://www.gnu.org/licenses/gpl-2.0.html
19  *
20  * GPL HEADER END
21  */
22 /*
23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Use is subject to license terms.
25  *
26  * Copyright (c) 2011, 2016, Intel Corporation.
27  */
28 /*
29  * This file is part of Lustre, http://www.lustre.org/
30  * Lustre is a trademark of Sun Microsystems, Inc.
31  *
32  * lustre/osd/osd_handler.c
33  *
34  * Top-level entry points into osd module
35  *
36  * Author: Nikita Danilov <nikita@clusterfs.com>
37  *         Pravin Shelar <pravin.shelar@sun.com> : Added fid in dirent
38  */
39
40 #define DEBUG_SUBSYSTEM S_OSD
41
42 #include <linux/module.h>
43 #include <linux/user_namespace.h>
44 #ifdef HAVE_UIDGID_HEADER
45 # include <linux/uidgid.h>
46 #endif
47
48 /* LUSTRE_VERSION_CODE */
49 #include <lustre_ver.h>
50 /* prerequisite for linux/xattr.h */
51 #include <linux/types.h>
52 /* prerequisite for linux/xattr.h */
53 #include <linux/fs.h>
54 /* XATTR_{REPLACE,CREATE} */
55 #include <linux/xattr.h>
56
57 #include <ldiskfs/ldiskfs.h>
58 #include <ldiskfs/xattr.h>
59 #include <ldiskfs/ldiskfs_extents.h>
60 #undef ENTRY
61 /*
62  * struct OBD_{ALLOC,FREE}*()
63  * OBD_FAIL_CHECK
64  */
65 #include <obd_support.h>
66 /* struct ptlrpc_thread */
67 #include <lustre_net.h>
68 #include <lustre_fid.h>
69 /* process_config */
70 #include <uapi/linux/lustre_param.h>
71
72 #include "osd_internal.h"
73 #include "osd_dynlocks.h"
74
75 /* llo_* api support */
76 #include <md_object.h>
77 #include <lustre_quota.h>
78
79 #include <lustre_linkea.h>
80
81 #define PFID_STRIPE_IDX_BITS    16
82 #define PFID_STRIPE_COUNT_MASK  ((1 << PFID_STRIPE_IDX_BITS) - 1)
83
84 int ldiskfs_pdo = 1;
85 module_param(ldiskfs_pdo, int, 0644);
86 MODULE_PARM_DESC(ldiskfs_pdo, "ldiskfs with parallel directory operations");
87
88 int ldiskfs_track_declares_assert;
89 module_param(ldiskfs_track_declares_assert, int, 0644);
90 MODULE_PARM_DESC(ldiskfs_track_declares_assert, "LBUG during tracking of declares");
91
92 /* Slab to allocate dynlocks */
93 struct kmem_cache *dynlock_cachep;
94
95 /* Slab to allocate osd_it_ea */
96 struct kmem_cache *osd_itea_cachep;
97
98 static struct lu_kmem_descr ldiskfs_caches[] = {
99         {
100                 .ckd_cache = &dynlock_cachep,
101                 .ckd_name  = "dynlock_cache",
102                 .ckd_size  = sizeof(struct dynlock_handle)
103         },
104         {
105                 .ckd_cache = &osd_itea_cachep,
106                 .ckd_name  = "osd_itea_cache",
107                 .ckd_size  = sizeof(struct osd_it_ea)
108         },
109         {
110                 .ckd_cache = NULL
111         }
112 };
113
114 static const char dot[] = ".";
115 static const char dotdot[] = "..";
116
117 static const struct lu_object_operations      osd_lu_obj_ops;
118 static const struct dt_object_operations      osd_obj_ops;
119 static const struct dt_object_operations      osd_obj_otable_it_ops;
120 static const struct dt_index_operations       osd_index_iam_ops;
121 static const struct dt_index_operations       osd_index_ea_ops;
122
123 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
124                           const struct lu_fid *fid);
125 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
126                                                 struct osd_device *osd);
127
128 int osd_trans_declare_op2rb[] = {
129         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
130         [OSD_OT_PUNCH]          = OSD_OT_MAX,
131         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
132         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
133         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
134         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
135         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
136         [OSD_OT_WRITE]          = OSD_OT_WRITE,
137         [OSD_OT_INSERT]         = OSD_OT_DELETE,
138         [OSD_OT_DELETE]         = OSD_OT_INSERT,
139         [OSD_OT_QUOTA]          = OSD_OT_MAX,
140 };
141
142 static int osd_has_index(const struct osd_object *obj)
143 {
144         return obj->oo_dt.do_index_ops != NULL;
145 }
146
147 static int osd_object_invariant(const struct lu_object *l)
148 {
149         return osd_invariant(osd_obj(l));
150 }
151
152 /*
153  * Concurrency: doesn't matter
154  */
155 static int osd_is_write_locked(const struct lu_env *env, struct osd_object *o)
156 {
157         struct osd_thread_info *oti = osd_oti_get(env);
158         return oti->oti_w_locks > 0 && o->oo_owner == env;
159 }
160
161 /*
162  * Concurrency: doesn't access mutable data
163  */
164 static int osd_root_get(const struct lu_env *env,
165                         struct dt_device *dev, struct lu_fid *f)
166 {
167         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
168         return 0;
169 }
170
171 /*
172  * the following set of functions are used to maintain per-thread
173  * cache of FID->ino mapping. this mechanism is needed to resolve
174  * FID to inode at dt_insert() which in turn stores ino in the
175  * directory entries to keep ldiskfs compatible with ext[34].
176  * due to locking-originated restrictions we can't lookup ino
177  * using LU cache (deadlock is possible). lookup using OI is quite
178  * expensive. so instead we maintain this cache and methods like
179  * dt_create() fill it. so in the majority of cases dt_insert() is
180  * able to find needed mapping in lockless manner.
181  */
182 static struct osd_idmap_cache *
183 osd_idc_find(const struct lu_env *env, struct osd_device *osd,
184              const struct lu_fid *fid)
185 {
186         struct osd_thread_info  *oti   = osd_oti_get(env);
187         struct osd_idmap_cache  *idc    = oti->oti_ins_cache;
188         int i;
189         for (i = 0; i < oti->oti_ins_cache_used; i++) {
190                 if (!lu_fid_eq(&idc[i].oic_fid, fid))
191                         continue;
192                 if (idc[i].oic_dev != osd)
193                         continue;
194
195                 return idc + i;
196         }
197
198         return NULL;
199 }
200
201 static struct osd_idmap_cache *
202 osd_idc_add(const struct lu_env *env, struct osd_device *osd,
203             const struct lu_fid *fid)
204 {
205         struct osd_thread_info  *oti   = osd_oti_get(env);
206         struct osd_idmap_cache  *idc;
207         int i;
208
209         if (unlikely(oti->oti_ins_cache_used >= oti->oti_ins_cache_size)) {
210                 i = oti->oti_ins_cache_size * 2;
211                 if (i == 0)
212                         i = OSD_INS_CACHE_SIZE;
213                 OBD_ALLOC(idc, sizeof(*idc) * i);
214                 if (idc == NULL)
215                         return ERR_PTR(-ENOMEM);
216                 if (oti->oti_ins_cache != NULL) {
217                         memcpy(idc, oti->oti_ins_cache,
218                                oti->oti_ins_cache_used * sizeof(*idc));
219                         OBD_FREE(oti->oti_ins_cache,
220                                  oti->oti_ins_cache_used * sizeof(*idc));
221                 }
222                 oti->oti_ins_cache = idc;
223                 oti->oti_ins_cache_size = i;
224         }
225
226         idc = oti->oti_ins_cache + oti->oti_ins_cache_used++;
227         idc->oic_fid = *fid;
228         idc->oic_dev = osd;
229         idc->oic_lid.oii_ino = 0;
230         idc->oic_lid.oii_gen = 0;
231         idc->oic_remote = 0;
232
233         return idc;
234 }
235
236 /*
237  * lookup mapping for the given fid in the cache, initialize a
238  * new one if not found. the initialization checks whether the
239  * object is local or remote. for local objects, OI is used to
240  * learn ino/generation. the function is used when the caller
241  * has no information about the object, e.g. at dt_insert().
242  */
243 static struct osd_idmap_cache *
244 osd_idc_find_or_init(const struct lu_env *env, struct osd_device *osd,
245                      const struct lu_fid *fid)
246 {
247         struct osd_idmap_cache *idc;
248         int rc;
249
250         idc = osd_idc_find(env, osd, fid);
251         LASSERT(!IS_ERR(idc));
252         if (idc != NULL)
253                 return idc;
254
255         /* new mapping is needed */
256         idc = osd_idc_add(env, osd, fid);
257         if (IS_ERR(idc))
258                 return idc;
259
260         /* initialize it */
261         rc = osd_remote_fid(env, osd, fid);
262         if (unlikely(rc < 0))
263                 return ERR_PTR(rc);
264
265         if (rc == 0) {
266                 /* the object is local, lookup in OI */
267                 /* XXX: probably cheaper to lookup in LU first? */
268                 rc = osd_oi_lookup(osd_oti_get(env), osd, fid,
269                                    &idc->oic_lid, 0);
270                 if (unlikely(rc < 0)) {
271                         CERROR("can't lookup: rc = %d\n", rc);
272                         return ERR_PTR(rc);
273                 }
274         } else {
275                 /* the object is remote */
276                 idc->oic_remote = 1;
277         }
278
279         return idc;
280 }
281
282 /*
283  * lookup mapping for given FID and fill it from the given object.
284  * the object is lolcal by definition.
285  */
286 static int osd_idc_find_and_init(const struct lu_env *env,
287                                  struct osd_device *osd,
288                                  struct osd_object *obj)
289 {
290         const struct lu_fid     *fid = lu_object_fid(&obj->oo_dt.do_lu);
291         struct osd_idmap_cache  *idc;
292
293         idc = osd_idc_find(env, osd, fid);
294         LASSERT(!IS_ERR(idc));
295         if (idc != NULL) {
296                 if (obj->oo_inode == NULL)
297                         return 0;
298                 if (idc->oic_lid.oii_ino != obj->oo_inode->i_ino) {
299                         LASSERT(idc->oic_lid.oii_ino == 0);
300                         idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
301                         idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
302                 }
303                 return 0;
304         }
305
306         /* new mapping is needed */
307         idc = osd_idc_add(env, osd, fid);
308         if (IS_ERR(idc))
309                 return PTR_ERR(idc);
310
311         if (obj->oo_inode != NULL) {
312                 idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
313                 idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
314         }
315         return 0;
316 }
317
318 /*
319  * OSD object methods.
320  */
321
322 /*
323  * Concurrency: no concurrent access is possible that early in object
324  * life-cycle.
325  */
326 static struct lu_object *osd_object_alloc(const struct lu_env *env,
327                                           const struct lu_object_header *hdr,
328                                           struct lu_device *d)
329 {
330         struct osd_object *mo;
331
332         OBD_ALLOC_PTR(mo);
333         if (mo != NULL) {
334                 struct lu_object *l;
335
336                 l = &mo->oo_dt.do_lu;
337                 dt_object_init(&mo->oo_dt, NULL, d);
338                 mo->oo_dt.do_ops = &osd_obj_ops;
339                 l->lo_ops = &osd_lu_obj_ops;
340                 init_rwsem(&mo->oo_sem);
341                 init_rwsem(&mo->oo_ext_idx_sem);
342                 spin_lock_init(&mo->oo_guard);
343                 INIT_LIST_HEAD(&mo->oo_xattr_list);
344                 return l;
345         } else {
346                 return NULL;
347         }
348 }
349
350 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
351                 struct dentry *dentry, struct lustre_ost_attrs *loa)
352 {
353         int rc;
354
355         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
356                              (void *)loa, sizeof(*loa));
357         if (rc > 0) {
358                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
359
360                 if (rc < sizeof(*lma))
361                         return -EINVAL;
362
363                 rc = 0;
364                 lustre_loa_swab(loa, true);
365                 /* Check LMA compatibility */
366                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
367                         CWARN("%s: unsupported incompat LMA feature(s) %#x "
368                               "for fid = "DFID", ino = %lu\n",
369                               osd_ino2name(inode),
370                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
371                               PFID(&lma->lma_self_fid), inode->i_ino);
372                         rc = -EOPNOTSUPP;
373                 }
374         } else if (rc == 0) {
375                 rc = -ENODATA;
376         }
377
378         return rc;
379 }
380
381 /*
382  * retrieve object from backend ext fs.
383  **/
384 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
385                        struct osd_inode_id *id)
386 {
387         int rc;
388         struct inode *inode = NULL;
389
390         /* if we look for an inode withing a running
391          * transaction, then we risk to deadlock */
392         /* osd_dirent_check_repair() breaks this */
393         /*LASSERT(current->journal_info == NULL);*/
394
395         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
396         if (IS_ERR(inode)) {
397                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
398                        id->oii_ino, PTR_ERR(inode));
399         } else if (id->oii_gen != OSD_OII_NOGEN &&
400                    inode->i_generation != id->oii_gen) {
401                 CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
402                        "i_generation = %u\n",
403                        id->oii_ino, id->oii_gen, inode->i_generation);
404                 iput(inode);
405                 inode = ERR_PTR(-ESTALE);
406         } else if (inode->i_nlink == 0) {
407                 /* due to parallel readdir and unlink,
408                 * we can have dead inode here. */
409                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
410                 iput(inode);
411                 inode = ERR_PTR(-ESTALE);
412         } else if (is_bad_inode(inode)) {
413                 CWARN("%s: bad inode: ino = %u\n",
414                 osd_dev2name(dev), id->oii_ino);
415                 iput(inode);
416                 inode = ERR_PTR(-ENOENT);
417         } else if ((rc = osd_attach_jinode(inode))) {
418                 iput(inode);
419                 inode = ERR_PTR(rc);
420         } else {
421                 ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
422                 if (id->oii_gen == OSD_OII_NOGEN)
423                         osd_id_gen(id, inode->i_ino, inode->i_generation);
424
425                 /* Do not update file c/mtime in ldiskfs.
426                  * NB: we don't have any lock to protect this because we don't
427                  * have reference on osd_object now, but contention with
428                  * another lookup + attr_set can't happen in the tiny window
429                  * between if (...) and set S_NOCMTIME. */
430                 if (!(inode->i_flags & S_NOCMTIME))
431                         inode->i_flags |= S_NOCMTIME;
432         }
433         return inode;
434 }
435
436 int osd_ldiskfs_add_entry(struct osd_thread_info *info, struct osd_device *osd,
437                           handle_t *handle, struct dentry *child,
438                           struct inode *inode, struct htree_lock *hlock)
439 {
440         int rc, rc2;
441
442         rc = __ldiskfs_add_entry(handle, child, inode, hlock);
443         if (rc == -ENOBUFS || rc == -ENOSPC) {
444                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
445                 struct inode *parent = child->d_parent->d_inode;
446                 struct lu_fid *fid = NULL;
447
448                 rc2 = osd_get_lma(info, parent, child->d_parent, loa);
449                 if (!rc2) {
450                         fid = &loa->loa_lma.lma_self_fid;
451                 } else if (rc2 == -ENODATA) {
452                         if (unlikely(parent == inode->i_sb->s_root->d_inode)) {
453                                 fid = &info->oti_fid3;
454                                 lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
455                         } else if (!osd->od_is_ost && osd->od_index == 0) {
456                                 fid = &info->oti_fid3;
457                                 lu_igif_build(fid, parent->i_ino,
458                                               parent->i_generation);
459                         }
460                 }
461
462                 if (fid != NULL)
463                         CWARN("%s: directory (inode: %lu, FID: "DFID") %s "
464                               "maximum entry limit\n",
465                               osd_name(osd), parent->i_ino, PFID(fid),
466                               rc == -ENOSPC ? "has reached" : "is approaching");
467                 else
468                         CWARN("%s: directory (inode: %lu, FID: unknown) %s "
469                               "maximum entry limit\n",
470                               osd_name(osd), parent->i_ino,
471                               rc == -ENOSPC ? "has reached" : "is approaching");
472
473                 /* ignore such error now */
474                 if (rc == -ENOBUFS)
475                         rc = 0;
476         }
477
478         return rc;
479 }
480
481
482 static struct inode *
483 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
484              struct osd_inode_id *id, struct lu_fid *fid)
485 {
486         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
487         struct inode *inode;
488         int rc;
489
490         inode = osd_iget(info, dev, id);
491         if (IS_ERR(inode))
492                 return inode;
493
494         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
495         if (!rc) {
496                 *fid = loa->loa_lma.lma_self_fid;
497         } else if (rc == -ENODATA) {
498                 if (unlikely(inode == osd_sb(dev)->s_root->d_inode))
499                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
500                 else
501                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
502         } else {
503                 iput(inode);
504                 inode = ERR_PTR(rc);
505         }
506         return inode;
507 }
508
509 static struct inode *osd_iget_check(struct osd_thread_info *info,
510                                     struct osd_device *dev,
511                                     const struct lu_fid *fid,
512                                     struct osd_inode_id *id,
513                                     bool trusted)
514 {
515         struct inode *inode;
516         int rc = 0;
517         ENTRY;
518
519         /* The cached OI mapping is trustable. If we cannot locate the inode
520          * via the cached OI mapping, then return the failure to the caller
521          * directly without further OI checking. */
522
523 again:
524         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
525         if (IS_ERR(inode)) {
526                 rc = PTR_ERR(inode);
527                 if (!trusted && (rc == -ENOENT || rc == -ESTALE))
528                         goto check_oi;
529
530                 CDEBUG(D_INODE, "no inode for FID: "DFID", ino = %u, rc = %d\n",
531                        PFID(fid), id->oii_ino, rc);
532                 GOTO(put, rc);
533         }
534
535         if (is_bad_inode(inode)) {
536                 rc = -ENOENT;
537                 if (!trusted)
538                         goto check_oi;
539
540                 CDEBUG(D_INODE, "bad inode for FID: "DFID", ino = %u\n",
541                        PFID(fid), id->oii_ino);
542                 GOTO(put, rc);
543         }
544
545         if (id->oii_gen != OSD_OII_NOGEN &&
546             inode->i_generation != id->oii_gen) {
547                 rc = -ESTALE;
548                 if (!trusted)
549                         goto check_oi;
550
551                 CDEBUG(D_INODE, "unmatched inode for FID: "DFID", ino = %u, "
552                        "oii_gen = %u, i_generation = %u\n", PFID(fid),
553                        id->oii_ino, id->oii_gen, inode->i_generation);
554                 GOTO(put, rc);
555         }
556
557         if (inode->i_nlink == 0) {
558                 rc = -ENOENT;
559                 if (!trusted)
560                         goto check_oi;
561
562                 CDEBUG(D_INODE, "stale inode for FID: "DFID", ino = %u\n",
563                        PFID(fid), id->oii_ino);
564                 GOTO(put, rc);
565         }
566
567         ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
568
569 check_oi:
570         if (rc != 0) {
571                 __u32 saved_ino = id->oii_ino;
572                 __u32 saved_gen = id->oii_gen;
573
574                 LASSERT(!trusted);
575                 LASSERTF(rc == -ESTALE || rc == -ENOENT, "rc = %d\n", rc);
576
577                 rc = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
578                 /* XXX: There are four possible cases:
579                  *      1. rc = 0.
580                  *         Backup/restore caused the OI invalid.
581                  *      2. rc = 0.
582                  *         Someone unlinked the object but NOT removed
583                  *         the OI mapping, such as mount target device
584                  *         as ldiskfs, and modify something directly.
585                  *      3. rc = -ENOENT.
586                  *         Someone just removed the object between the
587                  *         former oi_lookup and the iget. It is normal.
588                  *      4. Other failure cases.
589                  *
590                  *      Generally, when the device is mounted, it will
591                  *      auto check whether the system is restored from
592                  *      file-level backup or not. We trust such detect
593                  *      to distinguish the 1st case from the 2nd case:
594                  *      if the OI files are consistent but may contain
595                  *      stale OI mappings because of case 2, if iget()
596                  *      returns -ENOENT or -ESTALE, then it should be
597                  *      the case 2. */
598                 if (rc != 0)
599                         /* If the OI mapping was in OI file before the
600                          * osd_iget_check(), but now, it is disappear,
601                          * then it must be removed by race. That is a
602                          * normal race case. */
603                         GOTO(put, rc);
604
605                 /* It is the OI scrub updated the OI mapping by race.
606                  * The new OI mapping must be valid. */
607                 if (saved_ino != id->oii_ino ||
608                     (saved_gen != id->oii_gen && saved_gen != OSD_OII_NOGEN)) {
609                         if (!IS_ERR(inode))
610                                 iput(inode);
611
612                         trusted = true;
613                         goto again;
614                 }
615
616                 if (IS_ERR(inode)) {
617                         if (dev->od_scrub.os_file.sf_flags & SF_INCONSISTENT)
618                                 /* It still can be the case 2, but we cannot
619                                  * distinguish it from the case 1. So return
620                                  * -EREMCHG to block current operation until
621                                  *  OI scrub rebuilt the OI mappings. */
622                                 rc = -EREMCHG;
623                         else
624                                 rc = -ENOENT;
625
626                         GOTO(put, rc);
627                 }
628
629                 if (inode->i_generation == id->oii_gen)
630                         rc = -ENOENT;
631                 else
632                         rc = -EREMCHG;
633         } else {
634                 if (id->oii_gen == OSD_OII_NOGEN)
635                         osd_id_gen(id, inode->i_ino, inode->i_generation);
636
637                 /* Do not update file c/mtime in ldiskfs.
638                  * NB: we don't have any lock to protect this because we don't
639                  * have reference on osd_object now, but contention with
640                  * another lookup + attr_set can't happen in the tiny window
641                  * between if (...) and set S_NOCMTIME. */
642                 if (!(inode->i_flags & S_NOCMTIME))
643                         inode->i_flags |= S_NOCMTIME;
644         }
645
646         GOTO(put, rc);
647
648 put:
649         if (rc != 0) {
650                 if (!IS_ERR(inode))
651                         iput(inode);
652
653                 inode = ERR_PTR(rc);
654         }
655
656         return inode;
657 }
658
659 /**
660  * \retval +v: new filter_fid, does not contain self-fid
661  * \retval 0:  filter_fid_old, contains self-fid
662  * \retval -v: other failure cases
663  */
664 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
665                  struct dentry *dentry, struct lu_fid *fid)
666 {
667         struct filter_fid_old   *ff     = &info->oti_ff;
668         struct ost_id           *ostid  = &info->oti_ostid;
669         int                      rc;
670
671         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
672         if (rc == sizeof(*ff)) {
673                 rc = 0;
674                 ostid_set_seq(ostid, le64_to_cpu(ff->ff_seq));
675                 rc = ostid_set_id(ostid, le64_to_cpu(ff->ff_objid));
676                 /*
677                  * XXX: use 0 as the index for compatibility, the caller will
678                  *      handle index related issues when necessary.
679                  */
680                 if (!rc)
681                         ostid_to_fid(fid, ostid, 0);
682         } else if (rc == sizeof(struct filter_fid)) {
683                 rc = 1;
684         } else if (rc >= 0) {
685                 rc = -EINVAL;
686         }
687
688         return rc;
689 }
690
691 static int osd_lma_self_repair(struct osd_thread_info *info,
692                                struct osd_device *osd, struct inode *inode,
693                                const struct lu_fid *fid, __u32 compat)
694 {
695         handle_t *jh;
696         int       rc;
697
698         LASSERT(current->journal_info == NULL);
699
700         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
701                                   osd_dto_credits_noquota[DTO_XATTR_SET]);
702         if (IS_ERR(jh)) {
703                 rc = PTR_ERR(jh);
704                 CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
705                       osd_name(osd), rc);
706                 return rc;
707         }
708
709         rc = osd_ea_fid_set(info, inode, fid, compat, 0);
710         if (rc != 0)
711                 CWARN("%s: cannot self repair the LMA: rc = %d\n",
712                       osd_name(osd), rc);
713         ldiskfs_journal_stop(jh);
714         return rc;
715 }
716
717 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
718 {
719         struct osd_thread_info  *info   = osd_oti_get(env);
720         struct osd_device       *osd    = osd_obj2dev(obj);
721         struct lustre_ost_attrs *loa    = &info->oti_ost_attrs;
722         struct lustre_mdt_attrs *lma    = &loa->loa_lma;
723         struct inode            *inode  = obj->oo_inode;
724         struct dentry           *dentry = &info->oti_obj_dentry;
725         struct lu_fid           *fid    = NULL;
726         const struct lu_fid     *rfid   = lu_object_fid(&obj->oo_dt.do_lu);
727         int                      rc;
728         ENTRY;
729
730         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
731                              (void *)loa, sizeof(*loa));
732         if (rc == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
733                 fid = &lma->lma_self_fid;
734                 rc = osd_get_idif(info, inode, dentry, fid);
735                 if ((rc > 0) || (rc == -ENODATA && osd->od_index_in_idif)) {
736                         /* For the given OST-object, if it has neither LMA nor
737                          * FID in XATTR_NAME_FID, then the given FID (which is
738                          * contained in the @obj, from client RPC for locating
739                          * the OST-object) is trusted. We use it to generate
740                          * the LMA. */
741                         osd_lma_self_repair(info, osd, inode, rfid,
742                                             LMAC_FID_ON_OST);
743                         RETURN(0);
744                 }
745         }
746
747         if (rc < 0)
748                 RETURN(rc);
749
750         if (rc > 0) {
751                 rc = 0;
752                 lustre_lma_swab(lma);
753                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
754                              (CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT) &&
755                               S_ISREG(inode->i_mode)))) {
756                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
757                               "fid = "DFID", ino = %lu\n", osd_name(osd),
758                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
759                               PFID(rfid), inode->i_ino);
760                         rc = -EOPNOTSUPP;
761                 } else {
762                         fid = &lma->lma_self_fid;
763                 }
764         }
765
766         if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
767                 if (fid_is_idif(rfid) && fid_is_idif(fid)) {
768                         struct ost_id   *oi   = &info->oti_ostid;
769                         struct lu_fid   *fid1 = &info->oti_fid3;
770                         __u32            idx  = fid_idif_ost_idx(rfid);
771
772                         /* For old IDIF, the OST index is not part of the IDIF,
773                          * Means that different OSTs may have the same IDIFs.
774                          * Under such case, we need to make some compatible
775                          * check to make sure to trigger OI scrub properly. */
776                         if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
777                                 /* Given @rfid is new, LMA is old. */
778                                 fid_to_ostid(fid, oi);
779                                 ostid_to_fid(fid1, oi, idx);
780                                 if (lu_fid_eq(fid1, rfid)) {
781                                         if (osd->od_index_in_idif)
782                                                 osd_lma_self_repair(info, osd,
783                                                         inode, rfid,
784                                                         LMAC_FID_ON_OST);
785                                         RETURN(0);
786                                 }
787                         }
788                 }
789
790                 rc = -EREMCHG;
791         }
792
793         RETURN(rc);
794 }
795
796 struct osd_check_lmv_buf {
797 #ifdef HAVE_DIR_CONTEXT
798         /* please keep it as first member */
799         struct dir_context       ctx;
800 #endif
801         struct osd_thread_info  *oclb_info;
802         struct osd_device       *oclb_dev;
803         struct osd_idmap_cache  *oclb_oic;
804         int                      oclb_items;
805         bool                     oclb_found;
806 };
807
808 /**
809  * It is called internally by ->readdir() to filter out the
810  * local slave object's FID of the striped directory.
811  *
812  * \retval      1 found the local slave's FID
813  * \retval      0 continue to check next item
814  * \retval      -ve for failure
815  */
816 #ifdef HAVE_FILLDIR_USE_CTX
817 static int osd_stripe_dir_filldir(struct dir_context *buf,
818 #else
819 static int osd_stripe_dir_filldir(void *buf,
820 #endif
821                                   const char *name, int namelen,
822                                   loff_t offset, __u64 ino, unsigned d_type)
823 {
824         struct osd_check_lmv_buf *oclb = (struct osd_check_lmv_buf *)buf;
825         struct osd_thread_info *oti = oclb->oclb_info;
826         struct lu_fid *fid = &oti->oti_fid3;
827         struct osd_inode_id *id = &oti->oti_id3;
828         struct osd_device *dev = oclb->oclb_dev;
829         struct osd_idmap_cache *oic = oclb->oclb_oic;
830         struct inode *inode;
831
832         oclb->oclb_items++;
833
834         if (name[0] == '.')
835                 return 0;
836
837         fid_zero(fid);
838         sscanf(name + 1, SFID, RFID(fid));
839         if (!fid_is_sane(fid))
840                 return 0;
841
842         if (osd_remote_fid(oti->oti_env, dev, fid))
843                 return 0;
844
845         osd_id_gen(id, ino, OSD_OII_NOGEN);
846         inode = osd_iget(oti, dev, id);
847         if (IS_ERR(inode))
848                 return PTR_ERR(inode);
849
850         iput(inode);
851         osd_add_oi_cache(oti, dev, id, fid);
852         oic->oic_fid = *fid;
853         oic->oic_lid = *id;
854         oic->oic_dev = dev;
855         osd_oii_insert(dev, oic, true);
856         oclb->oclb_found = true;
857
858         return 1;
859 }
860
861 /* When lookup item under striped directory, we need to locate the master
862  * MDT-object of the striped directory firstly, then the client will send
863  * lookup (getattr_by_name) RPC to the MDT with some slave MDT-object's FID
864  * and the item's name. If the system is restored from MDT file level backup,
865  * then before the OI scrub completely built the OI files, the OI mappings of
866  * the master MDT-object and slave MDT-object may be invalid. Usually, it is
867  * not a problem for the master MDT-object. Because when locate the master
868  * MDT-object, we will do name based lookup (for the striped directory itself)
869  * firstly, during such process we can setup the correct OI mapping for the
870  * master MDT-object. But it will be trouble for the slave MDT-object. Because
871  * the client will not trigger name based lookup on the MDT to locate the slave
872  * MDT-object before locating item under the striped directory, then when
873  * osd_fid_lookup(), it will find that the OI mapping for the slave MDT-object
874  * is invalid and does not know what the right OI mapping is, then the MDT has
875  * to return -EINPROGRESS to the client to notify that the OI scrub is rebuiding
876  * the OI file, related OI mapping is unknown yet, please try again later. And
877  * then client will re-try the RPC again and again until related OI mapping has
878  * been updated. That is quite inefficient.
879  *
880  * To resolve above trouble, we will handle it as the following two cases:
881  *
882  * 1) The slave MDT-object and the master MDT-object are on different MDTs.
883  *    It is relative easy. Be as one of remote MDT-objects, the slave MDT-object
884  *    is linked under /REMOTE_PARENT_DIR with the name of its FID string.
885  *    We can locate the slave MDT-object via lookup the /REMOTE_PARENT_DIR
886  *    directly. Please check osd_fid_lookup().
887  *
888  * 2) The slave MDT-object and the master MDT-object reside on the same MDT.
889  *    Under such case, during lookup the master MDT-object, we will lookup the
890  *    slave MDT-object via readdir against the master MDT-object, because the
891  *    slave MDT-objects information are stored as sub-directories with the name
892  *    "${FID}:${index}". Then when find the local slave MDT-object, its OI
893  *    mapping will be recorded. Then subsequent osd_fid_lookup() will know
894  *    the correct OI mapping for the slave MDT-object. */
895 static int osd_check_lmv(struct osd_thread_info *oti, struct osd_device *dev,
896                          struct inode *inode, struct osd_idmap_cache *oic)
897 {
898         struct lu_buf *buf = &oti->oti_big_buf;
899         struct dentry *dentry = &oti->oti_obj_dentry;
900         struct file *filp = &oti->oti_file;
901         const struct file_operations *fops;
902         struct lmv_mds_md_v1 *lmv1;
903         struct osd_check_lmv_buf oclb = {
904 #ifdef HAVE_DIR_CONTEXT
905                 .ctx.actor = osd_stripe_dir_filldir,
906 #endif
907                 .oclb_info = oti,
908                 .oclb_dev = dev,
909                 .oclb_oic = oic,
910                 .oclb_found = false,
911         };
912         int rc = 0;
913         ENTRY;
914
915 again:
916         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMV, buf->lb_buf,
917                              buf->lb_len);
918         if (rc == -ERANGE) {
919                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMV, NULL, 0);
920                 if (rc > 0) {
921                         lu_buf_realloc(buf, rc);
922                         if (buf->lb_buf == NULL)
923                                 GOTO(out, rc = -ENOMEM);
924
925                         goto again;
926                 }
927         }
928
929         if (unlikely(rc == 0 || rc == -ENODATA))
930                 GOTO(out, rc = 0);
931
932         if (rc < 0)
933                 GOTO(out, rc);
934
935         if (unlikely(buf->lb_buf == NULL)) {
936                 lu_buf_realloc(buf, rc);
937                 if (buf->lb_buf == NULL)
938                         GOTO(out, rc = -ENOMEM);
939
940                 goto again;
941         }
942
943         lmv1 = buf->lb_buf;
944         if (le32_to_cpu(lmv1->lmv_magic) != LMV_MAGIC_V1)
945                 GOTO(out, rc = 0);
946
947         fops = inode->i_fop;
948         dentry->d_inode = inode;
949         dentry->d_sb = inode->i_sb;
950         filp->f_pos = 0;
951         filp->f_path.dentry = dentry;
952         filp->f_mode = FMODE_64BITHASH;
953         filp->f_mapping = inode->i_mapping;
954         filp->f_op = fops;
955         filp->private_data = NULL;
956         set_file_inode(filp, inode);
957
958         do {
959                 oclb.oclb_items = 0;
960 #ifdef HAVE_DIR_CONTEXT
961                 oclb.ctx.pos = filp->f_pos;
962                 rc = fops->iterate(filp, &oclb.ctx);
963                 filp->f_pos = oclb.ctx.pos;
964 #else
965                 rc = fops->readdir(filp, &oclb, osd_stripe_dir_filldir);
966 #endif
967         } while (rc >= 0 && oclb.oclb_items > 0 && !oclb.oclb_found &&
968                  filp->f_pos != LDISKFS_HTREE_EOF_64BIT);
969         fops->release(inode, filp);
970
971 out:
972         if (rc < 0)
973                 CDEBUG(D_LFSCK, "%s: fail to check LMV EA, inode = %lu/%u,"
974                        DFID": rc = %d\n", osd_ino2name(inode),
975                        inode->i_ino, inode->i_generation,
976                        PFID(&oic->oic_fid), rc);
977         else
978                 rc = 0;
979
980         RETURN(rc);
981 }
982
983 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
984                           const struct lu_fid *fid,
985                           const struct lu_object_conf *conf)
986 {
987         struct osd_thread_info *info;
988         struct lu_device *ldev = obj->oo_dt.do_lu.lo_dev;
989         struct osd_device *dev;
990         struct osd_idmap_cache *oic;
991         struct osd_inode_id *id;
992         struct inode *inode = NULL;
993         struct osd_scrub *scrub;
994         struct scrub_file *sf;
995         __u32 flags = SS_CLEAR_DRYRUN | SS_CLEAR_FAILOUT | SS_AUTO_FULL;
996         __u32 saved_ino;
997         __u32 saved_gen;
998         int result = 0;
999         int rc1 = 0;
1000         bool remote = false;
1001         bool trusted = true;
1002         bool updated = false;
1003         ENTRY;
1004
1005         LINVRNT(osd_invariant(obj));
1006         LASSERT(obj->oo_inode == NULL);
1007         LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID"\n", PFID(fid));
1008
1009         dev = osd_dev(ldev);
1010         scrub = &dev->od_scrub;
1011         sf = &scrub->os_file;
1012         info = osd_oti_get(env);
1013         LASSERT(info);
1014         oic = &info->oti_cache;
1015
1016         if (OBD_FAIL_CHECK(OBD_FAIL_SRV_ENOENT))
1017                 RETURN(-ENOENT);
1018
1019         /* For the object is created as locking anchor, or for the object to
1020          * be created on disk. No need to osd_oi_lookup() at here because FID
1021          * shouldn't never be re-used, if it's really a duplicate FID from
1022          * unexpected reason, we should be able to detect it later by calling
1023          * do_create->osd_oi_insert(). */
1024         if (conf && conf->loc_flags & LOC_F_NEW)
1025                 GOTO(out, result = 0);
1026
1027         /* Search order: 1. per-thread cache. */
1028         if (lu_fid_eq(fid, &oic->oic_fid) && likely(oic->oic_dev == dev)) {
1029                 id = &oic->oic_lid;
1030                 goto iget;
1031         }
1032
1033         id = &info->oti_id;
1034         if (!list_empty(&scrub->os_inconsistent_items)) {
1035                 /* Search order: 2. OI scrub pending list. */
1036                 result = osd_oii_lookup(dev, fid, id);
1037                 if (!result)
1038                         goto iget;
1039         }
1040
1041         /* The OI mapping in the OI file can be updated by the OI scrub
1042          * when we locate the inode via FID. So it may be not trustable. */
1043         trusted = false;
1044
1045         /* Search order: 3. OI files. */
1046         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1047         if (result == -ENOENT) {
1048                 if (!(fid_is_norm(fid) || fid_is_igif(fid)) ||
1049                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
1050                     !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
1051                                       sf->sf_oi_bitmap))
1052                         GOTO(out, result = 0);
1053
1054                 goto trigger;
1055         }
1056
1057         if (result)
1058                 GOTO(out, result);
1059
1060 iget:
1061         obj->oo_inode = NULL;
1062         /* for later passes through checks, not true on first pass */
1063         if (!IS_ERR_OR_NULL(inode))
1064                 iput(inode);
1065
1066         inode = osd_iget_check(info, dev, fid, id, trusted);
1067         if (!IS_ERR(inode)) {
1068                 obj->oo_inode = inode;
1069                 result = 0;
1070                 if (remote)
1071                         goto trigger;
1072
1073                 goto check_lma;
1074         }
1075
1076         result = PTR_ERR(inode);
1077         if (result == -ENOENT || result == -ESTALE)
1078                 GOTO(out, result = 0);
1079
1080         if (result != -EREMCHG)
1081                 GOTO(out, result);
1082
1083 trigger:
1084         /* We still have chance to get the valid inode: for the
1085          * object which is referenced by remote name entry, the
1086          * object on the local MDT will be linked under the dir
1087          * of "/REMOTE_PARENT_DIR" with its FID string as name.
1088          *
1089          * We do not know whether the object for the given FID
1090          * is referenced by some remote name entry or not, and
1091          * especially for DNE II, a multiple-linked object may
1092          * have many name entries reside on many MDTs.
1093          *
1094          * To simplify the operation, OSD will not distinguish
1095          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
1096          * only happened for the RPC from other MDT during the
1097          * OI scrub, or for the client side RPC with FID only,
1098          * such as FID to path, or from old connected client. */
1099         if (!remote) {
1100                 rc1 = osd_lookup_in_remote_parent(info, dev, fid, id);
1101                 if (!rc1) {
1102                         remote = true;
1103                         trusted = true;
1104                         flags |= SS_AUTO_PARTIAL;
1105                         flags &= ~SS_AUTO_FULL;
1106                         goto iget;
1107                 }
1108         }
1109
1110         if (thread_is_running(&scrub->os_thread)) {
1111                 if (scrub->os_partial_scan && !scrub->os_in_join)
1112                         goto join;
1113
1114                 if (IS_ERR_OR_NULL(inode) || result)
1115                         GOTO(out, result = -EINPROGRESS);
1116
1117                 LASSERT(remote);
1118                 LASSERT(obj->oo_inode == inode);
1119
1120                 osd_add_oi_cache(info, dev, id, fid);
1121                 osd_oii_insert(dev, oic, true);
1122                 goto found;
1123         }
1124
1125         if (dev->od_noscrub) {
1126                 if (!remote)
1127                         GOTO(out, result = -EREMCHG);
1128
1129                 LASSERT(!result);
1130                 LASSERT(obj->oo_inode == inode);
1131
1132                 osd_add_oi_cache(info, dev, id, fid);
1133                 goto found;
1134         }
1135
1136 join:
1137         rc1 = osd_scrub_start(dev, flags);
1138         LCONSOLE_WARN("%s: trigger OI scrub by RPC for the " DFID" with flags "
1139                       "0x%x, rc = %d\n", osd_name(dev), PFID(fid), flags, rc1);
1140         if (rc1 && rc1 != -EALREADY)
1141                 GOTO(out, result = -EREMCHG);
1142
1143         if (IS_ERR_OR_NULL(inode) || result)
1144                 GOTO(out, result = -EINPROGRESS);
1145
1146         LASSERT(remote);
1147         LASSERT(obj->oo_inode == inode);
1148
1149         osd_add_oi_cache(info, dev, id, fid);
1150         osd_oii_insert(dev, oic, true);
1151         goto found;
1152
1153 check_lma:
1154         result = osd_check_lma(env, obj);
1155         if (!result)
1156                 goto found;
1157
1158         LASSERTF(id->oii_ino == inode->i_ino &&
1159                  id->oii_gen == inode->i_generation,
1160                  "locate wrong inode for FID: "DFID", %u/%u => %ld/%u\n",
1161                  PFID(fid), id->oii_ino, id->oii_gen,
1162                  inode->i_ino, inode->i_generation);
1163
1164         saved_ino = inode->i_ino;
1165         saved_gen = inode->i_generation;
1166
1167         if (unlikely(result == -ENODATA)) {
1168                 /* If the OI scrub updated the OI mapping by race, it
1169                  * must be valid. Trust the inode that has no LMA EA. */
1170                 if (updated)
1171                         goto found;
1172
1173                 result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1174                 if (!result) {
1175                         /* The OI mapping is still there, the inode is still
1176                          * valid. It is just becaues the inode has no LMA EA. */
1177                         if (saved_ino == id->oii_ino &&
1178                             saved_gen == id->oii_gen)
1179                                 goto found;
1180
1181                         /* It is the OI scrub updated the OI mapping by race.
1182                          * The new OI mapping must be valid. */
1183                         trusted = true;
1184                         updated = true;
1185                         goto iget;
1186                 }
1187
1188                 /* "result == -ENOENT" means that the OI mappinghas been
1189                  * removed by race, so the inode belongs to other object.
1190                  *
1191                  * Others error can be returned  directly. */
1192                 if (result == -ENOENT) {
1193                         LASSERT(trusted);
1194
1195                         obj->oo_inode = NULL;
1196                         result = 0;
1197                 }
1198         }
1199
1200         if (result != -EREMCHG)
1201                 GOTO(out, result);
1202
1203         LASSERT(!updated);
1204
1205         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1206         /* "result == -ENOENT" means the cached OI mapping has been removed
1207          * from the OI file by race, above inode belongs to other object. */
1208         if (result == -ENOENT) {
1209                 LASSERT(trusted);
1210
1211                 obj->oo_inode = NULL;
1212                 GOTO(out, result = 0);
1213         }
1214
1215         if (result)
1216                 GOTO(out, result);
1217
1218         if (saved_ino == id->oii_ino && saved_gen == id->oii_gen) {
1219                 result = -EREMCHG;
1220                 goto trigger;
1221         }
1222
1223         /* It is the OI scrub updated the OI mapping by race.
1224          * The new OI mapping must be valid. */
1225         trusted = true;
1226         updated = true;
1227         goto iget;
1228
1229 found:
1230         obj->oo_compat_dot_created = 1;
1231         obj->oo_compat_dotdot_created = 1;
1232
1233         if (S_ISDIR(inode->i_mode) &&
1234             (flags & SS_AUTO_PARTIAL || sf->sf_status == SS_SCANNING))
1235                 osd_check_lmv(info, dev, inode, oic);
1236
1237         result = osd_attach_jinode(inode);
1238         if (result)
1239                 GOTO(out, result);
1240
1241         if (!ldiskfs_pdo)
1242                 GOTO(out, result = 0);
1243
1244         LASSERT(!obj->oo_hl_head);
1245         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
1246
1247         GOTO(out, result = (!obj->oo_hl_head ? -ENOMEM : 0));
1248
1249 out:
1250         if (result || !obj->oo_inode) {
1251                 if (!IS_ERR_OR_NULL(inode))
1252                         iput(inode);
1253
1254                 obj->oo_inode = NULL;
1255                 if (trusted)
1256                         fid_zero(&oic->oic_fid);
1257         }
1258
1259         LINVRNT(osd_invariant(obj));
1260         return result;
1261 }
1262
1263 /*
1264  * Concurrency: shouldn't matter.
1265  */
1266 static void osd_object_init0(struct osd_object *obj)
1267 {
1268         LASSERT(obj->oo_inode != NULL);
1269         obj->oo_dt.do_body_ops = &osd_body_ops;
1270         obj->oo_dt.do_lu.lo_header->loh_attr |=
1271                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
1272 }
1273
1274 /*
1275  * Concurrency: no concurrent access is possible that early in object
1276  * life-cycle.
1277  */
1278 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
1279                            const struct lu_object_conf *conf)
1280 {
1281         struct osd_object *obj = osd_obj(l);
1282         int result;
1283
1284         LINVRNT(osd_invariant(obj));
1285
1286         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
1287                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
1288                 l->lo_header->loh_attr |= LOHA_EXISTS;
1289                 return 0;
1290         }
1291
1292         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
1293         obj->oo_dt.do_body_ops = &osd_body_ops_new;
1294         if (result == 0 && obj->oo_inode != NULL) {
1295                 struct osd_thread_info *oti = osd_oti_get(env);
1296                 struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
1297
1298                 osd_object_init0(obj);
1299                 result = osd_get_lma(oti, obj->oo_inode,
1300                                      &oti->oti_obj_dentry, loa);
1301                 if (!result) {
1302                         /* Convert LMAI flags to lustre LMA flags
1303                          * and cache it to oo_lma_flags */
1304                         obj->oo_lma_flags =
1305                                 lma_to_lustre_flags(loa->loa_lma.lma_incompat);
1306                 } else if (result == -ENODATA) {
1307                         result = 0;
1308                 }
1309         }
1310
1311         LINVRNT(osd_invariant(obj));
1312         return result;
1313 }
1314
1315 /* The first part of oxe_buf is xattr name, and is '\0' terminated.
1316  * The left part is for value, binary mode. */
1317 struct osd_xattr_entry {
1318         struct list_head        oxe_list;
1319         size_t                  oxe_len;
1320         size_t                  oxe_namelen;
1321         bool                    oxe_exist;
1322         struct rcu_head         oxe_rcu;
1323         char                    oxe_buf[0];
1324 };
1325
1326 static int osd_oxc_get(struct osd_object *obj, const char *name,
1327                        struct lu_buf *buf)
1328 {
1329         struct osd_xattr_entry *tmp;
1330         struct osd_xattr_entry *oxe = NULL;
1331         size_t namelen = strlen(name);
1332         int rc;
1333         ENTRY;
1334
1335         rcu_read_lock();
1336         list_for_each_entry_rcu(tmp, &obj->oo_xattr_list, oxe_list) {
1337                 if (namelen == tmp->oxe_namelen &&
1338                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1339                         oxe = tmp;
1340                         break;
1341                 }
1342         }
1343
1344         if (oxe == NULL)
1345                 GOTO(out, rc = -ENOENT);
1346
1347         if (!oxe->oxe_exist)
1348                 GOTO(out, rc = -ENODATA);
1349
1350         /* vallen */
1351         rc = oxe->oxe_len - sizeof(*oxe) - oxe->oxe_namelen - 1;
1352         LASSERT(rc > 0);
1353
1354         if (buf->lb_buf == NULL)
1355                 GOTO(out, rc);
1356
1357         if (buf->lb_len < rc)
1358                 GOTO(out, rc = -ERANGE);
1359
1360         memcpy(buf->lb_buf, &oxe->oxe_buf[namelen + 1], rc);
1361         EXIT;
1362 out:
1363         rcu_read_unlock();
1364
1365         return rc;
1366 }
1367
1368 static void osd_oxc_free(struct rcu_head *head)
1369 {
1370         struct osd_xattr_entry *oxe;
1371
1372         oxe = container_of(head, struct osd_xattr_entry, oxe_rcu);
1373         OBD_FREE(oxe, oxe->oxe_len);
1374 }
1375
1376 static void osd_oxc_add(struct osd_object *obj, const char *name,
1377                         const char *buf, int buflen)
1378 {
1379         struct osd_xattr_entry *oxe;
1380         struct osd_xattr_entry *old = NULL;
1381         struct osd_xattr_entry *tmp;
1382         size_t namelen = strlen(name);
1383         size_t len = sizeof(*oxe) + namelen + 1 + buflen;
1384
1385         OBD_ALLOC(oxe, len);
1386         if (oxe == NULL)
1387                 return;
1388
1389         INIT_LIST_HEAD(&oxe->oxe_list);
1390         oxe->oxe_len = len;
1391         oxe->oxe_namelen = namelen;
1392         memcpy(oxe->oxe_buf, name, namelen);
1393         if (buflen > 0) {
1394                 LASSERT(buf != NULL);
1395                 memcpy(oxe->oxe_buf + namelen + 1, buf, buflen);
1396                 oxe->oxe_exist = true;
1397         } else {
1398                 oxe->oxe_exist = false;
1399         }
1400
1401         /* this should be rarely called, just remove old and add new */
1402         spin_lock(&obj->oo_guard);
1403         list_for_each_entry(tmp, &obj->oo_xattr_list, oxe_list) {
1404                 if (namelen == tmp->oxe_namelen &&
1405                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1406                         old = tmp;
1407                         break;
1408                 }
1409         }
1410         if (old != NULL) {
1411                 list_replace_rcu(&old->oxe_list, &oxe->oxe_list);
1412                 call_rcu(&old->oxe_rcu, osd_oxc_free);
1413         } else {
1414                 list_add_tail_rcu(&oxe->oxe_list, &obj->oo_xattr_list);
1415         }
1416         spin_unlock(&obj->oo_guard);
1417 }
1418
1419 static void osd_oxc_del(struct osd_object *obj, const char *name)
1420 {
1421         struct osd_xattr_entry *oxe;
1422         size_t namelen = strlen(name);
1423
1424         spin_lock(&obj->oo_guard);
1425         list_for_each_entry(oxe, &obj->oo_xattr_list, oxe_list) {
1426                 if (namelen == oxe->oxe_namelen &&
1427                     strncmp(name, oxe->oxe_buf, namelen) == 0) {
1428                         list_del_rcu(&oxe->oxe_list);
1429                         call_rcu(&oxe->oxe_rcu, osd_oxc_free);
1430                         break;
1431                 }
1432         }
1433         spin_unlock(&obj->oo_guard);
1434 }
1435
1436 static void osd_oxc_fini(struct osd_object *obj)
1437 {
1438         struct osd_xattr_entry *oxe, *next;
1439
1440         list_for_each_entry_safe(oxe, next, &obj->oo_xattr_list, oxe_list) {
1441                 list_del(&oxe->oxe_list);
1442                 OBD_FREE(oxe, oxe->oxe_len);
1443         }
1444 }
1445
1446 /*
1447  * Concurrency: no concurrent access is possible that late in object
1448  * life-cycle.
1449  */
1450 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
1451 {
1452         struct osd_object *obj = osd_obj(l);
1453
1454         LINVRNT(osd_invariant(obj));
1455
1456         osd_oxc_fini(obj);
1457         dt_object_fini(&obj->oo_dt);
1458         if (obj->oo_hl_head != NULL)
1459                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
1460         OBD_FREE_PTR(obj);
1461 }
1462
1463 /*
1464  * Concurrency: no concurrent access is possible that late in object
1465  * life-cycle.
1466  */
1467 static void osd_index_fini(struct osd_object *o)
1468 {
1469         struct iam_container *bag;
1470
1471         if (o->oo_dir != NULL) {
1472                 bag = &o->oo_dir->od_container;
1473                 if (o->oo_inode != NULL) {
1474                         if (bag->ic_object == o->oo_inode)
1475                                 iam_container_fini(bag);
1476                 }
1477                 OBD_FREE_PTR(o->oo_dir);
1478                 o->oo_dir = NULL;
1479         }
1480 }
1481
1482 /*
1483  * Concurrency: no concurrent access is possible that late in object
1484  * life-cycle (for all existing callers, that is. New callers have to provide
1485  * their own locking.)
1486  */
1487 static int osd_inode_unlinked(const struct inode *inode)
1488 {
1489         return inode->i_nlink == 0;
1490 }
1491
1492 enum {
1493         OSD_TXN_OI_DELETE_CREDITS    = 20,
1494         OSD_TXN_INODE_DELETE_CREDITS = 20
1495 };
1496
1497 /*
1498  * Journal
1499  */
1500
1501 #if OSD_THANDLE_STATS
1502 /**
1503  * Set time when the handle is allocated
1504  */
1505 static void osd_th_alloced(struct osd_thandle *oth)
1506 {
1507         oth->oth_alloced = ktime_get();
1508 }
1509
1510 /**
1511  * Set time when the handle started
1512  */
1513 static void osd_th_started(struct osd_thandle *oth)
1514 {
1515         oth->oth_started = ktime_get();
1516 }
1517
1518 /**
1519  * Check whether the we deal with this handle for too long.
1520  */
1521 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
1522                                 ktime_t alloced, ktime_t started,
1523                                 ktime_t closed)
1524 {
1525         ktime_t now = ktime_get();
1526
1527         LASSERT(dev != NULL);
1528
1529         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
1530                             ktime_us_delta(started, alloced));
1531         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
1532                             ktime_us_delta(closed, started));
1533         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
1534                             ktime_us_delta(now, closed));
1535
1536         if (ktime_before(ktime_add_ns(alloced, 30 * NSEC_PER_SEC), now)) {
1537                 CWARN("transaction handle %p was open for too long: now %lld, alloced %lld, started %lld, closed %lld\n",
1538                       oth, now, alloced, started, closed);
1539                 libcfs_debug_dumpstack(NULL);
1540         }
1541 }
1542
1543 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
1544 {                                                                       \
1545         ktime_t __closed = ktime_get();                                 \
1546         ktime_t __alloced = oth->oth_alloced;                           \
1547         ktime_t __started = oth->oth_started;                           \
1548                                                                         \
1549         expr;                                                           \
1550         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
1551 }
1552
1553 #else /* OSD_THANDLE_STATS */
1554
1555 #define osd_th_alloced(h)                  do {} while(0)
1556 #define osd_th_started(h)                  do {} while(0)
1557 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
1558
1559 #endif /* OSD_THANDLE_STATS */
1560
1561 /*
1562  * Concurrency: doesn't access mutable data.
1563  */
1564 static int osd_param_is_not_sane(const struct osd_device *dev,
1565                                  const struct thandle *th)
1566 {
1567         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
1568
1569         return oh->ot_credits > osd_transaction_size(dev);
1570 }
1571
1572 /*
1573  * Concurrency: shouldn't matter.
1574  */
1575 static void osd_trans_commit_cb(struct super_block *sb,
1576                                 struct ldiskfs_journal_cb_entry *jcb, int error)
1577 {
1578         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
1579         struct thandle     *th  = &oh->ot_super;
1580         struct lu_device   *lud = &th->th_dev->dd_lu_dev;
1581         struct dt_txn_commit_cb *dcb, *tmp;
1582
1583         LASSERT(oh->ot_handle == NULL);
1584
1585         if (error)
1586                 CERROR("transaction @0x%p commit error: %d\n", th, error);
1587
1588         dt_txn_hook_commit(th);
1589
1590         /* call per-transaction callbacks if any */
1591         list_for_each_entry_safe(dcb, tmp, &oh->ot_commit_dcb_list,
1592                                  dcb_linkage) {
1593                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1594                          "commit callback entry: magic=%x name='%s'\n",
1595                          dcb->dcb_magic, dcb->dcb_name);
1596                 list_del_init(&dcb->dcb_linkage);
1597                 dcb->dcb_func(NULL, th, dcb, error);
1598         }
1599
1600         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
1601         lu_device_put(lud);
1602         th->th_dev = NULL;
1603
1604         OBD_FREE_PTR(oh);
1605 }
1606
1607 #ifndef HAVE_SB_START_WRITE
1608 # define sb_start_write(sb) do {} while (0)
1609 # define sb_end_write(sb) do {} while (0)
1610 #endif
1611
1612 static struct thandle *osd_trans_create(const struct lu_env *env,
1613                                         struct dt_device *d)
1614 {
1615         struct osd_thread_info  *oti = osd_oti_get(env);
1616         struct osd_iobuf        *iobuf = &oti->oti_iobuf;
1617         struct osd_thandle      *oh;
1618         struct thandle          *th;
1619         ENTRY;
1620
1621         if (d->dd_rdonly) {
1622                 CERROR("%s: someone try to start transaction under "
1623                        "readonly mode, should be disabled.\n",
1624                        osd_name(osd_dt_dev(d)));
1625                 dump_stack();
1626                 RETURN(ERR_PTR(-EROFS));
1627         }
1628
1629         /* on pending IO in this thread should left from prev. request */
1630         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
1631
1632         sb_start_write(osd_sb(osd_dt_dev(d)));
1633
1634         OBD_ALLOC_GFP(oh, sizeof *oh, GFP_NOFS);
1635         if (oh != NULL) {
1636                 oh->ot_quota_trans = &oti->oti_quota_trans;
1637                 memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
1638                 th = &oh->ot_super;
1639                 th->th_dev = d;
1640                 th->th_result = 0;
1641                 oh->ot_credits = 0;
1642                 INIT_LIST_HEAD(&oh->ot_commit_dcb_list);
1643                 INIT_LIST_HEAD(&oh->ot_stop_dcb_list);
1644                 osd_th_alloced(oh);
1645
1646                 memset(oti->oti_declare_ops, 0,
1647                        sizeof(oti->oti_declare_ops));
1648                 memset(oti->oti_declare_ops_cred, 0,
1649                        sizeof(oti->oti_declare_ops_cred));
1650                 memset(oti->oti_declare_ops_used, 0,
1651                        sizeof(oti->oti_declare_ops_used));
1652         } else {
1653                 sb_end_write(osd_sb(osd_dt_dev(d)));
1654                 th = ERR_PTR(-ENOMEM);
1655         }
1656         RETURN(th);
1657 }
1658
1659 void osd_trans_dump_creds(const struct lu_env *env, struct thandle *th)
1660 {
1661         struct osd_thread_info  *oti = osd_oti_get(env);
1662         struct osd_thandle      *oh;
1663
1664         oh = container_of0(th, struct osd_thandle, ot_super);
1665         LASSERT(oh != NULL);
1666
1667         CWARN("  create: %u/%u/%u, destroy: %u/%u/%u\n",
1668               oti->oti_declare_ops[OSD_OT_CREATE],
1669               oti->oti_declare_ops_cred[OSD_OT_CREATE],
1670               oti->oti_declare_ops_used[OSD_OT_CREATE],
1671               oti->oti_declare_ops[OSD_OT_DESTROY],
1672               oti->oti_declare_ops_cred[OSD_OT_DESTROY],
1673               oti->oti_declare_ops_used[OSD_OT_DESTROY]);
1674         CWARN("  attr_set: %u/%u/%u, xattr_set: %u/%u/%u\n",
1675               oti->oti_declare_ops[OSD_OT_ATTR_SET],
1676               oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
1677               oti->oti_declare_ops_used[OSD_OT_ATTR_SET],
1678               oti->oti_declare_ops[OSD_OT_XATTR_SET],
1679               oti->oti_declare_ops_cred[OSD_OT_XATTR_SET],
1680               oti->oti_declare_ops_used[OSD_OT_XATTR_SET]);
1681         CWARN("  write: %u/%u/%u, punch: %u/%u/%u, quota %u/%u/%u\n",
1682               oti->oti_declare_ops[OSD_OT_WRITE],
1683               oti->oti_declare_ops_cred[OSD_OT_WRITE],
1684               oti->oti_declare_ops_used[OSD_OT_WRITE],
1685               oti->oti_declare_ops[OSD_OT_PUNCH],
1686               oti->oti_declare_ops_cred[OSD_OT_PUNCH],
1687               oti->oti_declare_ops_used[OSD_OT_PUNCH],
1688               oti->oti_declare_ops[OSD_OT_QUOTA],
1689               oti->oti_declare_ops_cred[OSD_OT_QUOTA],
1690               oti->oti_declare_ops_used[OSD_OT_QUOTA]);
1691         CWARN("  insert: %u/%u/%u, delete: %u/%u/%u\n",
1692               oti->oti_declare_ops[OSD_OT_INSERT],
1693               oti->oti_declare_ops_cred[OSD_OT_INSERT],
1694               oti->oti_declare_ops_used[OSD_OT_INSERT],
1695               oti->oti_declare_ops[OSD_OT_DELETE],
1696               oti->oti_declare_ops_cred[OSD_OT_DELETE],
1697               oti->oti_declare_ops_used[OSD_OT_DELETE]);
1698         CWARN("  ref_add: %u/%u/%u, ref_del: %u/%u/%u\n",
1699               oti->oti_declare_ops[OSD_OT_REF_ADD],
1700               oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
1701               oti->oti_declare_ops_used[OSD_OT_REF_ADD],
1702               oti->oti_declare_ops[OSD_OT_REF_DEL],
1703               oti->oti_declare_ops_cred[OSD_OT_REF_DEL],
1704               oti->oti_declare_ops_used[OSD_OT_REF_DEL]);
1705 }
1706
1707 /*
1708  * Concurrency: shouldn't matter.
1709  */
1710 static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
1711                            struct thandle *th)
1712 {
1713         struct osd_thread_info *oti = osd_oti_get(env);
1714         struct osd_device  *dev = osd_dt_dev(d);
1715         handle_t           *jh;
1716         struct osd_thandle *oh;
1717         int rc;
1718
1719         ENTRY;
1720
1721         LASSERT(current->journal_info == NULL);
1722
1723         oh = container_of0(th, struct osd_thandle, ot_super);
1724         LASSERT(oh != NULL);
1725         LASSERT(oh->ot_handle == NULL);
1726
1727         rc = dt_txn_hook_start(env, d, th);
1728         if (rc != 0)
1729                 GOTO(out, rc);
1730
1731         if (unlikely(osd_param_is_not_sane(dev, th))) {
1732                 static unsigned long last_printed;
1733                 static int last_credits;
1734
1735                 /* don't make noise on a tiny testing systems
1736                  * actual credits misuse will be caught anyway */
1737                 if (last_credits != oh->ot_credits &&
1738                     time_after(jiffies, last_printed +
1739                                msecs_to_jiffies(60 * MSEC_PER_SEC)) &&
1740                     osd_transaction_size(dev) > 512) {
1741                         CWARN("%s: credits %u > trans_max %u\n", osd_name(dev),
1742                               oh->ot_credits, osd_transaction_size(dev));
1743                         osd_trans_dump_creds(env, th);
1744                         libcfs_debug_dumpstack(NULL);
1745                         last_credits = oh->ot_credits;
1746                         last_printed = jiffies;
1747                 }
1748                 /* XXX Limit the credits to 'max_transaction_buffers', and
1749                  *     let the underlying filesystem to catch the error if
1750                  *     we really need so many credits.
1751                  *
1752                  *     This should be removed when we can calculate the
1753                  *     credits precisely. */
1754                 oh->ot_credits = osd_transaction_size(dev);
1755         } else if (ldiskfs_track_declares_assert != 0) {
1756                 /* reserve few credits to prevent an assertion in JBD
1757                  * our debugging mechanism will be able to detected
1758                  * overuse. this can help to debug single-update
1759                  * transactions */
1760                 oh->ot_credits += 10;
1761                 if (unlikely(osd_param_is_not_sane(dev, th)))
1762                         oh->ot_credits = osd_transaction_size(dev);
1763         }
1764
1765         /*
1766          * XXX temporary stuff. Some abstraction layer should
1767          * be used.
1768          */
1769         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
1770         osd_th_started(oh);
1771         if (!IS_ERR(jh)) {
1772                 oh->ot_handle = jh;
1773                 LASSERT(oti->oti_txns == 0);
1774
1775                 lu_device_get(&d->dd_lu_dev);
1776                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
1777                               "osd-tx", th);
1778                 oti->oti_txns++;
1779                 rc = 0;
1780         } else {
1781                 rc = PTR_ERR(jh);
1782         }
1783 out:
1784         RETURN(rc);
1785 }
1786
1787 static int osd_seq_exists(const struct lu_env *env,
1788                           struct osd_device *osd, u64 seq)
1789 {
1790         struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
1791         struct seq_server_site  *ss = osd_seq_site(osd);
1792         int                     rc;
1793         ENTRY;
1794
1795         LASSERT(ss != NULL);
1796         LASSERT(ss->ss_server_fld != NULL);
1797
1798         rc = osd_fld_lookup(env, osd, seq, range);
1799         if (rc != 0) {
1800                 if (rc != -ENOENT)
1801                         CERROR("%s: can't lookup FLD sequence %#llx: rc = %d\n",
1802                                osd_name(osd), seq, rc);
1803                 RETURN(0);
1804         }
1805
1806         RETURN(ss->ss_node_id == range->lsr_index);
1807 }
1808
1809 static void osd_trans_stop_cb(struct osd_thandle *oth, int result)
1810 {
1811         struct dt_txn_commit_cb *dcb;
1812         struct dt_txn_commit_cb *tmp;
1813
1814         /* call per-transaction stop callbacks if any */
1815         list_for_each_entry_safe(dcb, tmp, &oth->ot_stop_dcb_list,
1816                                  dcb_linkage) {
1817                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1818                          "commit callback entry: magic=%x name='%s'\n",
1819                          dcb->dcb_magic, dcb->dcb_name);
1820                 list_del_init(&dcb->dcb_linkage);
1821                 dcb->dcb_func(NULL, &oth->ot_super, dcb, result);
1822         }
1823 }
1824
1825 /*
1826  * Concurrency: shouldn't matter.
1827  */
1828 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
1829                           struct thandle *th)
1830 {
1831         int                     rc = 0, remove_agents = 0;
1832         struct osd_thandle     *oh;
1833         struct osd_thread_info *oti = osd_oti_get(env);
1834         struct osd_iobuf       *iobuf = &oti->oti_iobuf;
1835         struct osd_device      *osd = osd_dt_dev(th->th_dev);
1836         struct qsd_instance    *qsd = osd->od_quota_slave;
1837         struct lquota_trans    *qtrans;
1838         ENTRY;
1839
1840         oh = container_of0(th, struct osd_thandle, ot_super);
1841
1842         remove_agents = oh->ot_remove_agents;
1843
1844         qtrans = oh->ot_quota_trans;
1845         oh->ot_quota_trans = NULL;
1846
1847         if (oh->ot_handle != NULL) {
1848                 int rc2;
1849                 handle_t *hdl = oh->ot_handle;
1850
1851                 /*
1852                  * add commit callback
1853                  * notice we don't do this in osd_trans_start()
1854                  * as underlying transaction can change during truncate
1855                  */
1856                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
1857                                          &oh->ot_jcb);
1858
1859                 LASSERT(oti->oti_txns == 1);
1860                 oti->oti_txns--;
1861
1862                 rc = dt_txn_hook_stop(env, th);
1863                 if (rc != 0)
1864                         CERROR("%s: failed in transaction hook: rc = %d\n",
1865                                osd_name(osd), rc);
1866
1867                 osd_trans_stop_cb(oh, rc);
1868                 /* hook functions might modify th_sync */
1869                 hdl->h_sync = th->th_sync;
1870
1871                 oh->ot_handle = NULL;
1872                 OSD_CHECK_SLOW_TH(oh, osd, rc2 = ldiskfs_journal_stop(hdl));
1873                 if (rc2 != 0)
1874                         CERROR("%s: failed to stop transaction: rc = %d\n",
1875                                osd_name(osd), rc2);
1876                 if (!rc)
1877                         rc = rc2;
1878         } else {
1879                 osd_trans_stop_cb(oh, th->th_result);
1880                 OBD_FREE_PTR(oh);
1881         }
1882
1883         /* inform the quota slave device that the transaction is stopping */
1884         qsd_op_end(env, qsd, qtrans);
1885
1886         /* as we want IO to journal and data IO be concurrent, we don't block
1887          * awaiting data IO completion in osd_do_bio(), instead we wait here
1888          * once transaction is submitted to the journal. all reqular requests
1889          * don't do direct IO (except read/write), thus this wait_event becomes
1890          * no-op for them.
1891          *
1892          * IMPORTANT: we have to wait till any IO submited by the thread is
1893          * completed otherwise iobuf may be corrupted by different request
1894          */
1895         wait_event(iobuf->dr_wait,
1896                        atomic_read(&iobuf->dr_numreqs) == 0);
1897         osd_fini_iobuf(osd, iobuf);
1898         if (!rc)
1899                 rc = iobuf->dr_error;
1900
1901         if (unlikely(remove_agents != 0))
1902                 osd_process_scheduled_agent_removals(env, osd);
1903
1904         /* reset OI cache for safety */
1905         oti->oti_ins_cache_used = 0;
1906
1907         sb_end_write(osd_sb(osd));
1908
1909         RETURN(rc);
1910 }
1911
1912 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
1913 {
1914         struct osd_thandle *oh = container_of0(th, struct osd_thandle,
1915                                                ot_super);
1916
1917         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
1918         LASSERT(&dcb->dcb_func != NULL);
1919         if (dcb->dcb_flags & DCB_TRANS_STOP)
1920                 list_add(&dcb->dcb_linkage, &oh->ot_stop_dcb_list);
1921         else
1922                 list_add(&dcb->dcb_linkage, &oh->ot_commit_dcb_list);
1923
1924         return 0;
1925 }
1926
1927 /*
1928  * Called just before object is freed. Releases all resources except for
1929  * object itself (that is released by osd_object_free()).
1930  *
1931  * Concurrency: no concurrent access is possible that late in object
1932  * life-cycle.
1933  */
1934 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
1935 {
1936         struct osd_object *obj   = osd_obj(l);
1937         struct inode      *inode = obj->oo_inode;
1938
1939         LINVRNT(osd_invariant(obj));
1940
1941         /*
1942          * If object is unlinked remove fid->ino mapping from object index.
1943          */
1944
1945         osd_index_fini(obj);
1946         if (inode != NULL) {
1947                 struct qsd_instance     *qsd = osd_obj2dev(obj)->od_quota_slave;
1948                 qid_t                    uid = i_uid_read(inode);
1949                 qid_t                    gid = i_gid_read(inode);
1950
1951                 iput(inode);
1952                 obj->oo_inode = NULL;
1953
1954                 if (qsd != NULL) {
1955                         struct osd_thread_info  *info = osd_oti_get(env);
1956                         struct lquota_id_info   *qi = &info->oti_qi;
1957
1958                         /* Release granted quota to master if necessary */
1959                         qi->lqi_id.qid_uid = uid;
1960                         qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
1961
1962                         qi->lqi_id.qid_uid = gid;
1963                         qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
1964
1965                         qi->lqi_id.qid_uid = i_projid_read(inode);
1966                         qsd_op_adjust(env, qsd, &qi->lqi_id, PRJQUOTA);
1967                 }
1968         }
1969 }
1970
1971 /*
1972  * Concurrency: ->loo_object_release() is called under site spin-lock.
1973  */
1974 static void osd_object_release(const struct lu_env *env,
1975                                struct lu_object *l)
1976 {
1977         struct osd_object *o = osd_obj(l);
1978         /* nobody should be releasing a non-destroyed object with nlink=0
1979          * the API allows this, but ldiskfs doesn't like and then report
1980          * this inode as deleted */
1981         if (unlikely(!o->oo_destroyed && o->oo_inode && o->oo_inode->i_nlink == 0))
1982                 LBUG();
1983 }
1984
1985 /*
1986  * Concurrency: shouldn't matter.
1987  */
1988 static int osd_object_print(const struct lu_env *env, void *cookie,
1989                             lu_printer_t p, const struct lu_object *l)
1990 {
1991         struct osd_object *o = osd_obj(l);
1992         struct iam_descr  *d;
1993
1994         if (o->oo_dir != NULL)
1995                 d = o->oo_dir->od_container.ic_descr;
1996         else
1997                 d = NULL;
1998         return (*p)(env, cookie,
1999                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
2000                     o, o->oo_inode,
2001                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
2002                     o->oo_inode ? o->oo_inode->i_generation : 0,
2003                     d ? d->id_ops->id_name : "plain");
2004 }
2005
2006 /*
2007  * Concurrency: shouldn't matter.
2008  */
2009 int osd_statfs(const struct lu_env *env, struct dt_device *d,
2010                struct obd_statfs *sfs)
2011 {
2012         struct osd_device       *osd = osd_dt_dev(d);
2013         struct super_block      *sb = osd_sb(osd);
2014         struct kstatfs          *ksfs;
2015         __u64                    reserved;
2016         int                      result = 0;
2017
2018         if (unlikely(osd->od_mnt == NULL))
2019                 return -EINPROGRESS;
2020
2021         /* osd_lproc.c call this without env, allocate ksfs for that case */
2022         if (unlikely(env == NULL)) {
2023                 OBD_ALLOC_PTR(ksfs);
2024                 if (ksfs == NULL)
2025                         return -ENOMEM;
2026         } else {
2027                 ksfs = &osd_oti_get(env)->oti_ksfs;
2028         }
2029
2030         result = sb->s_op->statfs(sb->s_root, ksfs);
2031         if (result)
2032                 goto out;
2033
2034         statfs_pack(sfs, ksfs);
2035         if (unlikely(sb->s_flags & MS_RDONLY))
2036                 sfs->os_state |= OS_STATE_READONLY;
2037         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb,
2038                                          LDISKFS_FEATURE_INCOMPAT_EXTENTS))
2039                 sfs->os_maxbytes = sb->s_maxbytes;
2040         else
2041                 sfs->os_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2042
2043         /*
2044          * Reserve some space so to avoid fragmenting the filesystem too much.
2045          * Fragmentation not only impacts performance, but can also increase
2046          * metadata overhead significantly, causing grant calculation to be
2047          * wrong.
2048          *
2049          * Reserve 0.78% of total space, at least 8MB for small filesystems.
2050          */
2051         CLASSERT(OSD_STATFS_RESERVED > LDISKFS_MAX_BLOCK_SIZE);
2052         reserved = OSD_STATFS_RESERVED >> sb->s_blocksize_bits;
2053         if (likely(sfs->os_blocks >= reserved << OSD_STATFS_RESERVED_SHIFT))
2054                 reserved = sfs->os_blocks >> OSD_STATFS_RESERVED_SHIFT;
2055
2056         sfs->os_blocks -= reserved;
2057         sfs->os_bfree  -= min(reserved, sfs->os_bfree);
2058         sfs->os_bavail -= min(reserved, sfs->os_bavail);
2059
2060 out:
2061         if (unlikely(env == NULL))
2062                 OBD_FREE_PTR(ksfs);
2063         return result;
2064 }
2065
2066 /**
2067  * Estimate space needed for file creations. We assume the largest filename
2068  * which is 2^64 - 1, hence a filename of 20 chars.
2069  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
2070  */
2071 #ifdef __LDISKFS_DIR_REC_LEN
2072 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
2073 #else
2074 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
2075 #endif
2076
2077 /*
2078  * Concurrency: doesn't access mutable data.
2079  */
2080 static void osd_conf_get(const struct lu_env *env,
2081                          const struct dt_device *dev,
2082                          struct dt_device_param *param)
2083 {
2084         struct super_block *sb = osd_sb(osd_dt_dev(dev));
2085         int                ea_overhead;
2086
2087         /*
2088          * XXX should be taken from not-yet-existing fs abstraction layer.
2089          */
2090         param->ddp_max_name_len = LDISKFS_NAME_LEN;
2091         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
2092         param->ddp_symlink_max  = sb->s_blocksize;
2093         param->ddp_mount_type     = LDD_MT_LDISKFS;
2094         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EXTENTS))
2095                 param->ddp_maxbytes = sb->s_maxbytes;
2096         else
2097                 param->ddp_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2098         /* inode are statically allocated, so per-inode space consumption
2099          * is the space consumed by the directory entry */
2100         param->ddp_inodespace     = PER_OBJ_USAGE;
2101         /* EXT_INIT_MAX_LEN is the theoretical maximum extent size  (32k blocks
2102          * = 128MB) which is unlikely to be hit in real life. Report a smaller
2103          * maximum length to not under count the actual number of extents
2104          * needed for writing a file. */
2105         param->ddp_max_extent_blks = EXT_INIT_MAX_LEN >> 2;
2106         /* worst-case extent insertion metadata overhead */
2107         param->ddp_extent_tax = 6 * LDISKFS_BLOCK_SIZE(sb);
2108         param->ddp_mntopts      = 0;
2109         if (test_opt(sb, XATTR_USER))
2110                 param->ddp_mntopts |= MNTOPT_USERXATTR;
2111         if (test_opt(sb, POSIX_ACL))
2112                 param->ddp_mntopts |= MNTOPT_ACL;
2113
2114         /* LOD might calculate the max stripe count based on max_ea_size,
2115          * so we need take account in the overhead as well,
2116          * xattr_header + magic + xattr_entry_head */
2117         ea_overhead = sizeof(struct ldiskfs_xattr_header) + sizeof(__u32) +
2118                       LDISKFS_XATTR_LEN(XATTR_NAME_MAX_LEN);
2119
2120 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
2121         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EA_INODE))
2122                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE -
2123                                                                 ea_overhead;
2124         else
2125 #endif
2126                 param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
2127
2128         /* Preferred RPC size for efficient disk IO.  4MB shows good
2129          * all-around performance for ldiskfs, but use bigalloc chunk size
2130          * by default if larger. */
2131 #if defined(LDISKFS_CLUSTER_SIZE)
2132         if (LDISKFS_CLUSTER_SIZE(sb) > DT_DEF_BRW_SIZE)
2133                 param->ddp_brw_size = LDISKFS_CLUSTER_SIZE(sb);
2134         else
2135 #endif
2136                 param->ddp_brw_size = DT_DEF_BRW_SIZE;
2137 }
2138
2139 /*
2140  * Concurrency: shouldn't matter.
2141  */
2142 static int osd_sync(const struct lu_env *env, struct dt_device *d)
2143 {
2144         int rc;
2145
2146         CDEBUG(D_CACHE, "%s: syncing OSD\n", osd_dt_dev(d)->od_svname);
2147
2148         rc = ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
2149
2150         CDEBUG(D_CACHE, "%s: synced OSD: rc = %d\n", osd_dt_dev(d)->od_svname,
2151                rc);
2152
2153         return rc;
2154 }
2155
2156 /**
2157  * Start commit for OSD device.
2158  *
2159  * An implementation of dt_commit_async method for OSD device.
2160  * Asychronously starts underlayng fs sync and thereby a transaction
2161  * commit.
2162  *
2163  * \param env environment
2164  * \param d dt device
2165  *
2166  * \see dt_device_operations
2167  */
2168 static int osd_commit_async(const struct lu_env *env,
2169                             struct dt_device *d)
2170 {
2171         struct super_block *s = osd_sb(osd_dt_dev(d));
2172         ENTRY;
2173
2174         CDEBUG(D_HA, "%s: async commit OSD\n", osd_dt_dev(d)->od_svname);
2175         RETURN(s->s_op->sync_fs(s, 0));
2176 }
2177
2178 /* Our own copy of the set readonly functions if present, or NU if not. */
2179 static int (*priv_dev_set_rdonly)(struct block_device *bdev);
2180 static int (*priv_dev_check_rdonly)(struct block_device *bdev);
2181 /* static int (*priv_dev_clear_rdonly)(struct block_device *bdev); */
2182
2183 /*
2184  * Concurrency: shouldn't matter.
2185  */
2186 static int osd_ro(const struct lu_env *env, struct dt_device *d)
2187 {
2188         struct super_block *sb = osd_sb(osd_dt_dev(d));
2189         struct block_device *dev = sb->s_bdev;
2190         int rc = -EOPNOTSUPP;
2191         ENTRY;
2192
2193         if (priv_dev_set_rdonly) {
2194                 struct block_device *jdev = LDISKFS_SB(sb)->journal_bdev;
2195
2196                 rc = 0;
2197                 CERROR("*** setting %s read-only ***\n",
2198                        osd_dt_dev(d)->od_svname);
2199
2200                 if (sb->s_op->freeze_fs) {
2201                         rc = sb->s_op->freeze_fs(sb);
2202                         if (rc)
2203                                 goto out;
2204                 }
2205
2206                 if (jdev && (jdev != dev)) {
2207                         CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n",
2208                                (long)jdev);
2209                         priv_dev_set_rdonly(jdev);
2210                 }
2211                 CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev);
2212                 priv_dev_set_rdonly(dev);
2213
2214                 if (sb->s_op->unfreeze_fs)
2215                         sb->s_op->unfreeze_fs(sb);
2216         }
2217
2218 out:
2219         if (rc)
2220                 CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
2221                        osd_dt_dev(d)->od_svname, (long)dev, rc);
2222
2223         RETURN(rc);
2224 }
2225
2226 /**
2227  * Note: we do not count into QUOTA here.
2228  * If we mount with --data_journal we may need more.
2229  */
2230 const int osd_dto_credits_noquota[DTO_NR] = {
2231         /**
2232          * Insert.
2233          * INDEX_EXTRA_TRANS_BLOCKS(8) +
2234          * SINGLEDATA_TRANS_BLOCKS(8)
2235          * XXX Note: maybe iam need more, since iam have more level than
2236          *           EXT3 htree.
2237          */
2238         [DTO_INDEX_INSERT]  = 16,
2239         /**
2240          * Delete
2241          * just modify a single entry, probably merge few within a block
2242          */
2243         [DTO_INDEX_DELETE]  = 1,
2244         /**
2245          * Used for OI scrub
2246          */
2247         [DTO_INDEX_UPDATE]  = 16,
2248         /**
2249          * 4(inode, inode bits, groups, GDT)
2250          *   notice: OI updates are counted separately with DTO_INDEX_INSERT
2251          */
2252         [DTO_OBJECT_CREATE] = 4,
2253         /**
2254          * 4(inode, inode bits, groups, GDT)
2255          *   notice: OI updates are counted separately with DTO_INDEX_DELETE
2256          */
2257         [DTO_OBJECT_DELETE] = 4,
2258         /**
2259          * Attr set credits (inode)
2260          */
2261         [DTO_ATTR_SET_BASE] = 1,
2262         /**
2263          * Xattr set. The same as xattr of EXT3.
2264          * DATA_TRANS_BLOCKS(14)
2265          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
2266          * are also counted in. Do not know why?
2267          */
2268         [DTO_XATTR_SET]     = 14,
2269         /**
2270          * credits for inode change during write.
2271          */
2272         [DTO_WRITE_BASE]    = 3,
2273         /**
2274          * credits for single block write.
2275          */
2276         [DTO_WRITE_BLOCK]   = 14,
2277         /**
2278          * Attr set credits for chown.
2279          * This is extra credits for setattr, and it is null without quota
2280          */
2281         [DTO_ATTR_SET_CHOWN] = 0
2282 };
2283
2284 static const struct dt_device_operations osd_dt_ops = {
2285         .dt_root_get       = osd_root_get,
2286         .dt_statfs         = osd_statfs,
2287         .dt_trans_create   = osd_trans_create,
2288         .dt_trans_start    = osd_trans_start,
2289         .dt_trans_stop     = osd_trans_stop,
2290         .dt_trans_cb_add   = osd_trans_cb_add,
2291         .dt_conf_get       = osd_conf_get,
2292         .dt_sync           = osd_sync,
2293         .dt_ro             = osd_ro,
2294         .dt_commit_async   = osd_commit_async,
2295 };
2296
2297 static void osd_read_lock(const struct lu_env *env, struct dt_object *dt,
2298                           unsigned role)
2299 {
2300         struct osd_object *obj = osd_dt_obj(dt);
2301         struct osd_thread_info *oti = osd_oti_get(env);
2302
2303         LINVRNT(osd_invariant(obj));
2304
2305         LASSERT(obj->oo_owner != env);
2306         down_read_nested(&obj->oo_sem, role);
2307
2308         LASSERT(obj->oo_owner == NULL);
2309         oti->oti_r_locks++;
2310 }
2311
2312 static void osd_write_lock(const struct lu_env *env, struct dt_object *dt,
2313                            unsigned role)
2314 {
2315         struct osd_object *obj = osd_dt_obj(dt);
2316         struct osd_thread_info *oti = osd_oti_get(env);
2317
2318         LINVRNT(osd_invariant(obj));
2319
2320         LASSERT(obj->oo_owner != env);
2321         down_write_nested(&obj->oo_sem, role);
2322
2323         LASSERT(obj->oo_owner == NULL);
2324         obj->oo_owner = env;
2325         oti->oti_w_locks++;
2326 }
2327
2328 static void osd_read_unlock(const struct lu_env *env, struct dt_object *dt)
2329 {
2330         struct osd_object *obj = osd_dt_obj(dt);
2331         struct osd_thread_info *oti = osd_oti_get(env);
2332
2333         LINVRNT(osd_invariant(obj));
2334
2335         LASSERT(oti->oti_r_locks > 0);
2336         oti->oti_r_locks--;
2337         up_read(&obj->oo_sem);
2338 }
2339
2340 static void osd_write_unlock(const struct lu_env *env, struct dt_object *dt)
2341 {
2342         struct osd_object *obj = osd_dt_obj(dt);
2343         struct osd_thread_info *oti = osd_oti_get(env);
2344
2345         LINVRNT(osd_invariant(obj));
2346
2347         LASSERT(obj->oo_owner == env);
2348         LASSERT(oti->oti_w_locks > 0);
2349         oti->oti_w_locks--;
2350         obj->oo_owner = NULL;
2351         up_write(&obj->oo_sem);
2352 }
2353
2354 static int osd_write_locked(const struct lu_env *env, struct dt_object *dt)
2355 {
2356         struct osd_object *obj = osd_dt_obj(dt);
2357
2358         LINVRNT(osd_invariant(obj));
2359
2360         return obj->oo_owner == env;
2361 }
2362
2363 static struct timespec *osd_inode_time(const struct lu_env *env,
2364                                        struct inode *inode, __u64 seconds)
2365 {
2366         struct osd_thread_info  *oti = osd_oti_get(env);
2367         struct timespec         *t   = &oti->oti_time;
2368
2369         t->tv_sec = seconds;
2370         t->tv_nsec = 0;
2371         *t = timespec_trunc(*t, inode->i_sb->s_time_gran);
2372         return t;
2373 }
2374
2375 static void osd_inode_getattr(const struct lu_env *env,
2376                               struct inode *inode, struct lu_attr *attr)
2377 {
2378         attr->la_valid  |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
2379                            LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
2380                            LA_PROJID | LA_FLAGS | LA_NLINK | LA_RDEV |
2381                            LA_BLKSIZE | LA_TYPE;
2382
2383         attr->la_atime   = LTIME_S(inode->i_atime);
2384         attr->la_mtime   = LTIME_S(inode->i_mtime);
2385         attr->la_ctime   = LTIME_S(inode->i_ctime);
2386         attr->la_mode    = inode->i_mode;
2387         attr->la_size    = i_size_read(inode);
2388         attr->la_blocks  = inode->i_blocks;
2389         attr->la_uid     = i_uid_read(inode);
2390         attr->la_gid     = i_gid_read(inode);
2391         attr->la_projid  = i_projid_read(inode);
2392         attr->la_flags   = ll_inode_to_ext_flags(inode->i_flags);
2393         attr->la_nlink   = inode->i_nlink;
2394         attr->la_rdev    = inode->i_rdev;
2395         attr->la_blksize = 1 << inode->i_blkbits;
2396         attr->la_blkbits = inode->i_blkbits;
2397         /*
2398          * Ext4 did not transfer inherit flags from raw inode
2399          * to inode flags, and ext4 internally test raw inode
2400          * @i_flags directly. Instead of patching ext4, we do it here.
2401          */
2402         if (LDISKFS_I(inode)->i_flags & LUSTRE_PROJINHERIT_FL)
2403                 attr->la_flags |= LUSTRE_PROJINHERIT_FL;
2404 }
2405
2406 static int osd_attr_get(const struct lu_env *env,
2407                         struct dt_object *dt,
2408                         struct lu_attr *attr)
2409 {
2410         struct osd_object *obj = osd_dt_obj(dt);
2411
2412         if (unlikely(!dt_object_exists(dt)))
2413                 return -ENOENT;
2414         if (unlikely(obj->oo_destroyed))
2415                 return -ENOENT;
2416
2417         LASSERT(!dt_object_remote(dt));
2418         LINVRNT(osd_invariant(obj));
2419
2420         spin_lock(&obj->oo_guard);
2421         osd_inode_getattr(env, obj->oo_inode, attr);
2422         if (obj->oo_lma_flags & LUSTRE_ORPHAN_FL)
2423                 attr->la_flags |= LUSTRE_ORPHAN_FL;
2424         spin_unlock(&obj->oo_guard);
2425
2426         return 0;
2427 }
2428
2429 static int osd_declare_attr_qid(const struct lu_env *env,
2430                                 struct osd_object *obj,
2431                                 struct osd_thandle *oh, long long bspace,
2432                                 qid_t old_id, qid_t new_id, bool enforce,
2433                                 unsigned type)
2434 {
2435         int rc;
2436         struct osd_thread_info *info = osd_oti_get(env);
2437         struct lquota_id_info  *qi = &info->oti_qi;
2438
2439         qi->lqi_type = type;
2440         /* inode accounting */
2441         qi->lqi_is_blk = false;
2442
2443         /* one more inode for the new id ... */
2444         qi->lqi_id.qid_uid = new_id;
2445         qi->lqi_space      = 1;
2446         /* Reserve credits for the new id */
2447         rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
2448         if (rc == -EDQUOT || rc == -EINPROGRESS)
2449                 rc = 0;
2450         if (rc)
2451                 RETURN(rc);
2452
2453         /* and one less inode for the current id */
2454         qi->lqi_id.qid_uid = old_id;
2455         qi->lqi_space      = -1;
2456         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2457         if (rc == -EDQUOT || rc == -EINPROGRESS)
2458                 rc = 0;
2459         if (rc)
2460                 RETURN(rc);
2461
2462         /* block accounting */
2463         qi->lqi_is_blk = true;
2464
2465         /* more blocks for the new id ... */
2466         qi->lqi_id.qid_uid = new_id;
2467         qi->lqi_space      = bspace;
2468         /*
2469          * Credits for the new uid has been reserved, re-use "obj"
2470          * to save credit reservation.
2471          */
2472         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2473         if (rc == -EDQUOT || rc == -EINPROGRESS)
2474                 rc = 0;
2475         if (rc)
2476                 RETURN(rc);
2477
2478         /* and finally less blocks for the current uid */
2479         qi->lqi_id.qid_uid = old_id;
2480         qi->lqi_space      = -bspace;
2481         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2482         if (rc == -EDQUOT || rc == -EINPROGRESS)
2483                 rc = 0;
2484
2485         RETURN(rc);
2486 }
2487
2488 static int osd_declare_attr_set(const struct lu_env *env,
2489                                 struct dt_object *dt,
2490                                 const struct lu_attr *attr,
2491                                 struct thandle *handle)
2492 {
2493         struct osd_thandle     *oh;
2494         struct osd_object      *obj;
2495         qid_t                   uid;
2496         qid_t                   gid;
2497         long long               bspace;
2498         int                     rc = 0;
2499         bool                    enforce;
2500         ENTRY;
2501
2502         LASSERT(dt != NULL);
2503         LASSERT(handle != NULL);
2504
2505         obj = osd_dt_obj(dt);
2506         LASSERT(osd_invariant(obj));
2507
2508         oh = container_of0(handle, struct osd_thandle, ot_super);
2509         LASSERT(oh->ot_handle == NULL);
2510
2511         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
2512                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2513
2514         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
2515                              osd_dto_credits_noquota[DTO_XATTR_SET]);
2516
2517         if (attr == NULL || obj->oo_inode == NULL)
2518                 RETURN(rc);
2519
2520         bspace   = obj->oo_inode->i_blocks;
2521         bspace <<= obj->oo_inode->i_sb->s_blocksize_bits;
2522         bspace   = toqb(bspace);
2523
2524         /* Changing ownership is always preformed by super user, it should not
2525          * fail with EDQUOT.
2526          *
2527          * We still need to call the osd_declare_qid() to calculate the journal
2528          * credits for updating quota accounting files and to trigger quota
2529          * space adjustment once the operation is completed.*/
2530         if (attr->la_valid & LA_UID || attr->la_valid & LA_GID) {
2531                 /* USERQUOTA */
2532                 uid = i_uid_read(obj->oo_inode);
2533                 enforce = (attr->la_valid & LA_UID) && (attr->la_uid != uid);
2534                 rc = osd_declare_attr_qid(env, obj, oh, bspace, uid,
2535                                           attr->la_uid, enforce, USRQUOTA);
2536                 if (rc)
2537                         RETURN(rc);
2538
2539                 gid = i_gid_read(obj->oo_inode);
2540                 enforce = (attr->la_valid & LA_GID) && (attr->la_gid != gid);
2541                 rc = osd_declare_attr_qid(env, obj, oh, bspace,
2542                                           i_gid_read(obj->oo_inode),
2543                                           attr->la_gid, enforce, GRPQUOTA);
2544                 if (rc)
2545                         RETURN(rc);
2546
2547         }
2548 #ifdef HAVE_PROJECT_QUOTA
2549         if (attr->la_valid & LA_PROJID) {
2550                 __u32 projid = i_projid_read(obj->oo_inode);
2551                 enforce = (attr->la_valid & LA_PROJID) &&
2552                                         (attr->la_projid != projid);
2553                 rc = osd_declare_attr_qid(env, obj, oh, bspace,
2554                                           (qid_t)projid, (qid_t)attr->la_projid,
2555                                           enforce, PRJQUOTA);
2556                 if (rc)
2557                         RETURN(rc);
2558         }
2559 #endif
2560         RETURN(rc);
2561 }
2562
2563 static int osd_inode_setattr(const struct lu_env *env,
2564                              struct inode *inode, const struct lu_attr *attr)
2565 {
2566         __u64 bits = attr->la_valid;
2567
2568         /* Only allow set size for regular file */
2569         if (!S_ISREG(inode->i_mode))
2570                 bits &= ~(LA_SIZE | LA_BLOCKS);
2571
2572         if (bits == 0)
2573                 return 0;
2574
2575         if (bits & LA_ATIME)
2576                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
2577         if (bits & LA_CTIME)
2578                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
2579         if (bits & LA_MTIME)
2580                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
2581         if (bits & LA_SIZE) {
2582                 spin_lock(&inode->i_lock);
2583                 LDISKFS_I(inode)->i_disksize = attr->la_size;
2584                 i_size_write(inode, attr->la_size);
2585                 spin_unlock(&inode->i_lock);
2586         }
2587
2588         /* OSD should not change "i_blocks" which is used by quota.
2589          * "i_blocks" should be changed by ldiskfs only. */
2590         if (bits & LA_MODE)
2591                 inode->i_mode = (inode->i_mode & S_IFMT) |
2592                                 (attr->la_mode & ~S_IFMT);
2593         if (bits & LA_UID)
2594                 i_uid_write(inode, attr->la_uid);
2595         if (bits & LA_GID)
2596                 i_gid_write(inode, attr->la_gid);
2597         if (bits & LA_PROJID)
2598                 i_projid_write(inode, attr->la_projid);
2599         if (bits & LA_NLINK)
2600                 set_nlink(inode, attr->la_nlink);
2601         if (bits & LA_RDEV)
2602                 inode->i_rdev = attr->la_rdev;
2603
2604         if (bits & LA_FLAGS) {
2605                 /* always keep S_NOCMTIME */
2606                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
2607                                  S_NOCMTIME;
2608                 /*
2609                  * Ext4 did not transfer inherit flags from
2610                  * @inode->i_flags to raw inode i_flags when writing
2611                  * flags, we do it explictly here.
2612                  */
2613                 if (attr->la_flags & LUSTRE_PROJINHERIT_FL)
2614                         LDISKFS_I(inode)->i_flags |= LUSTRE_PROJINHERIT_FL;
2615                 else
2616                         LDISKFS_I(inode)->i_flags &= ~LUSTRE_PROJINHERIT_FL;
2617         }
2618         return 0;
2619 }
2620
2621 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr)
2622 {
2623         int rc;
2624
2625         if ((attr->la_valid & LA_UID && attr->la_uid != i_uid_read(inode)) ||
2626             (attr->la_valid & LA_GID && attr->la_gid != i_gid_read(inode))) {
2627                 struct iattr    iattr;
2628
2629                 ll_vfs_dq_init(inode);
2630                 iattr.ia_valid = 0;
2631                 if (attr->la_valid & LA_UID)
2632                         iattr.ia_valid |= ATTR_UID;
2633                 if (attr->la_valid & LA_GID)
2634                         iattr.ia_valid |= ATTR_GID;
2635                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
2636                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
2637
2638                 rc = ll_vfs_dq_transfer(inode, &iattr);
2639                 if (rc) {
2640                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
2641                                "enforcement enabled on the ldiskfs "
2642                                "filesystem?\n", inode->i_sb->s_id, rc);
2643                         return rc;
2644                 }
2645         }
2646
2647 #ifdef HAVE_PROJECT_QUOTA
2648         /* Handle project id transfer here properly */
2649         if (attr->la_valid & LA_PROJID &&
2650             attr->la_projid != i_projid_read(inode)) {
2651                 rc = __ldiskfs_ioctl_setproject(inode, attr->la_projid);
2652                 if (rc) {
2653                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
2654                                "enforcement enabled on the ldiskfs "
2655                                "filesystem?\n", inode->i_sb->s_id, rc);
2656                         return rc;
2657                 }
2658         }
2659 #endif
2660         return 0;
2661 }
2662
2663 static int osd_attr_set(const struct lu_env *env,
2664                         struct dt_object *dt,
2665                         const struct lu_attr *attr,
2666                         struct thandle *handle)
2667 {
2668         struct osd_object *obj = osd_dt_obj(dt);
2669         struct inode      *inode;
2670         int rc;
2671
2672         if (!dt_object_exists(dt))
2673                 return -ENOENT;
2674
2675         LASSERT(handle != NULL);
2676         LASSERT(!dt_object_remote(dt));
2677         LASSERT(osd_invariant(obj));
2678
2679         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
2680
2681         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING)) {
2682                 struct osd_thread_info  *oti  = osd_oti_get(env);
2683                 const struct lu_fid     *fid0 = lu_object_fid(&dt->do_lu);
2684                 struct lu_fid           *fid1 = &oti->oti_fid;
2685                 struct osd_inode_id     *id   = &oti->oti_id;
2686                 struct iam_path_descr   *ipd;
2687                 struct iam_container    *bag;
2688                 struct osd_thandle      *oh;
2689                 int                      rc;
2690
2691                 fid_cpu_to_be(fid1, fid0);
2692                 memset(id, 1, sizeof(*id));
2693                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
2694                                   fid0)->oi_dir.od_container;
2695                 ipd = osd_idx_ipd_get(env, bag);
2696                 if (unlikely(ipd == NULL))
2697                         RETURN(-ENOMEM);
2698
2699                 oh = container_of0(handle, struct osd_thandle, ot_super);
2700                 rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)fid1,
2701                                 (const struct iam_rec *)id, ipd);
2702                 osd_ipd_put(env, bag, ipd);
2703                 return(rc > 0 ? 0 : rc);
2704         }
2705
2706         inode = obj->oo_inode;
2707
2708         rc = osd_quota_transfer(inode, attr);
2709         if (rc)
2710                 return rc;
2711
2712         spin_lock(&obj->oo_guard);
2713         rc = osd_inode_setattr(env, inode, attr);
2714         spin_unlock(&obj->oo_guard);
2715         if (rc != 0)
2716                 GOTO(out, rc);
2717
2718         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2719
2720         if (!(attr->la_valid & LA_FLAGS))
2721                 GOTO(out, rc);
2722
2723         /* Let's check if there are extra flags need to be set into LMA */
2724         if (attr->la_flags & LUSTRE_LMA_FL_MASKS) {
2725                 struct osd_thread_info *info = osd_oti_get(env);
2726                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
2727
2728                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
2729                                  &info->oti_ost_attrs);
2730                 if (rc)
2731                         GOTO(out, rc);
2732
2733                 lma->lma_incompat |=
2734                         lustre_to_lma_flags(attr->la_flags);
2735                 lustre_lma_swab(lma);
2736                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA,
2737                                      lma, sizeof(*lma), XATTR_REPLACE);
2738                 if (rc != 0) {
2739                         struct osd_device *osd = osd_obj2dev(obj);
2740
2741                         CWARN("%s: set "DFID" lma flags %u failed: rc = %d\n",
2742                               osd_name(osd), PFID(lu_object_fid(&dt->do_lu)),
2743                               lma->lma_incompat, rc);
2744                 } else {
2745                         obj->oo_lma_flags =
2746                                 attr->la_flags & LUSTRE_LMA_FL_MASKS;
2747                 }
2748                 osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
2749         }
2750 out:
2751         osd_trans_exec_check(env, handle, OSD_OT_ATTR_SET);
2752
2753         return rc;
2754 }
2755
2756 static struct dentry *osd_child_dentry_get(const struct lu_env *env,
2757                                            struct osd_object *obj,
2758                                            const char *name, const int namelen)
2759 {
2760         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
2761 }
2762
2763 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
2764                       umode_t mode, struct dt_allocation_hint *hint,
2765                       struct thandle *th)
2766 {
2767         int result;
2768         struct osd_device  *osd = osd_obj2dev(obj);
2769         struct osd_thandle *oth;
2770         struct dt_object   *parent = NULL;
2771         struct inode       *inode;
2772
2773         LINVRNT(osd_invariant(obj));
2774         LASSERT(obj->oo_inode == NULL);
2775         LASSERT(obj->oo_hl_head == NULL);
2776
2777         if (S_ISDIR(mode) && ldiskfs_pdo) {
2778                 obj->oo_hl_head =ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
2779                 if (obj->oo_hl_head == NULL)
2780                         return -ENOMEM;
2781         }
2782
2783         oth = container_of(th, struct osd_thandle, ot_super);
2784         LASSERT(oth->ot_handle->h_transaction != NULL);
2785
2786         if (hint != NULL && hint->dah_parent != NULL &&
2787             !dt_object_remote(hint->dah_parent))
2788                 parent = hint->dah_parent;
2789
2790         inode = ldiskfs_create_inode(oth->ot_handle,
2791                                      parent ? osd_dt_obj(parent)->oo_inode :
2792                                               osd_sb(osd)->s_root->d_inode,
2793                                      mode);
2794         if (!IS_ERR(inode)) {
2795                 /* Do not update file c/mtime in ldiskfs. */
2796                 inode->i_flags |= S_NOCMTIME;
2797
2798                 /* For new created object, it must be consistent,
2799                  * and it is unnecessary to scrub against it. */
2800                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
2801
2802                 obj->oo_inode = inode;
2803                 result = 0;
2804         } else {
2805                 if (obj->oo_hl_head != NULL) {
2806                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
2807                         obj->oo_hl_head = NULL;
2808                 }
2809                 result = PTR_ERR(inode);
2810         }
2811         LINVRNT(osd_invariant(obj));
2812         return result;
2813 }
2814
2815 enum {
2816         OSD_NAME_LEN = 255
2817 };
2818
2819 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
2820                      struct lu_attr *attr,
2821                      struct dt_allocation_hint *hint,
2822                      struct dt_object_format *dof,
2823                      struct thandle *th)
2824 {
2825         int result;
2826         struct osd_thandle *oth;
2827         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX | S_ISGID));
2828
2829         LASSERT(S_ISDIR(attr->la_mode));
2830
2831         oth = container_of(th, struct osd_thandle, ot_super);
2832         LASSERT(oth->ot_handle->h_transaction != NULL);
2833         result = osd_mkfile(info, obj, mode, hint, th);
2834
2835         return result;
2836 }
2837
2838 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
2839                         struct lu_attr *attr,
2840                         struct dt_allocation_hint *hint,
2841                         struct dt_object_format *dof,
2842                         struct thandle *th)
2843 {
2844         int result;
2845         struct osd_thandle *oth;
2846         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
2847
2848         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
2849
2850         LASSERT(S_ISREG(attr->la_mode));
2851
2852         oth = container_of(th, struct osd_thandle, ot_super);
2853         LASSERT(oth->ot_handle->h_transaction != NULL);
2854
2855         result = osd_mkfile(info, obj, mode, hint, th);
2856         if (result == 0) {
2857                 LASSERT(obj->oo_inode != NULL);
2858                 if (feat->dif_flags & DT_IND_VARKEY)
2859                         result = iam_lvar_create(obj->oo_inode,
2860                                                  feat->dif_keysize_max,
2861                                                  feat->dif_ptrsize,
2862                                                  feat->dif_recsize_max,
2863                                                  oth->ot_handle);
2864                 else
2865                         result = iam_lfix_create(obj->oo_inode,
2866                                                  feat->dif_keysize_max,
2867                                                  feat->dif_ptrsize,
2868                                                  feat->dif_recsize_max,
2869                                                  oth->ot_handle);
2870
2871         }
2872         return result;
2873 }
2874
2875 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
2876                      struct lu_attr *attr,
2877                      struct dt_allocation_hint *hint,
2878                      struct dt_object_format *dof,
2879                      struct thandle *th)
2880 {
2881         LASSERT(S_ISREG(attr->la_mode));
2882         return osd_mkfile(info, obj, (attr->la_mode &
2883                                (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2884 }
2885
2886 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
2887                      struct lu_attr *attr,
2888                      struct dt_allocation_hint *hint,
2889                      struct dt_object_format *dof,
2890                      struct thandle *th)
2891 {
2892         LASSERT(S_ISLNK(attr->la_mode));
2893         return osd_mkfile(info, obj, (attr->la_mode &
2894                               (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2895 }
2896
2897 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
2898                      struct lu_attr *attr,
2899                      struct dt_allocation_hint *hint,
2900                      struct dt_object_format *dof,
2901                      struct thandle *th)
2902 {
2903         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
2904         int result;
2905
2906         LINVRNT(osd_invariant(obj));
2907         LASSERT(obj->oo_inode == NULL);
2908         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
2909                 S_ISFIFO(mode) || S_ISSOCK(mode));
2910
2911         result = osd_mkfile(info, obj, mode, hint, th);
2912         if (result == 0) {
2913                 LASSERT(obj->oo_inode != NULL);
2914                 /*
2915                  * This inode should be marked dirty for i_rdev.  Currently
2916                  * that is done in the osd_attr_init().
2917                  */
2918                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
2919                                    attr->la_rdev);
2920         }
2921         LINVRNT(osd_invariant(obj));
2922         return result;
2923 }
2924
2925 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
2926                               struct lu_attr *,
2927                               struct dt_allocation_hint *hint,
2928                               struct dt_object_format *dof,
2929                               struct thandle *);
2930
2931 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
2932 {
2933         osd_obj_type_f result;
2934
2935         switch (type) {
2936         case DFT_DIR:
2937                 result = osd_mkdir;
2938                 break;
2939         case DFT_REGULAR:
2940                 result = osd_mkreg;
2941                 break;
2942         case DFT_SYM:
2943                 result = osd_mksym;
2944                 break;
2945         case DFT_NODE:
2946                 result = osd_mknod;
2947                 break;
2948         case DFT_INDEX:
2949                 result = osd_mk_index;
2950                 break;
2951
2952         default:
2953                 LBUG();
2954                 break;
2955         }
2956         return result;
2957 }
2958
2959
2960 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
2961                         struct dt_object *parent, struct dt_object *child,
2962                         umode_t child_mode)
2963 {
2964         LASSERT(ah);
2965
2966         ah->dah_parent = parent;
2967         ah->dah_mode = child_mode;
2968
2969         if (parent != NULL && !dt_object_remote(parent)) {
2970                 /* will help to find FID->ino at dt_insert("..") */
2971                 struct osd_object *pobj = osd_dt_obj(parent);
2972                 osd_idc_find_and_init(env, osd_obj2dev(pobj), pobj);
2973         }
2974 }
2975
2976 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
2977                           struct lu_attr *attr, struct dt_object_format *dof)
2978 {
2979         struct inode   *inode = obj->oo_inode;
2980         __u64           valid = attr->la_valid;
2981         int             result;
2982
2983         attr->la_valid &= ~(LA_TYPE | LA_MODE);
2984
2985         if (dof->dof_type != DFT_NODE)
2986                 attr->la_valid &= ~LA_RDEV;
2987         if ((valid & LA_ATIME) && (attr->la_atime == LTIME_S(inode->i_atime)))
2988                 attr->la_valid &= ~LA_ATIME;
2989         if ((valid & LA_CTIME) && (attr->la_ctime == LTIME_S(inode->i_ctime)))
2990                 attr->la_valid &= ~LA_CTIME;
2991         if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
2992                 attr->la_valid &= ~LA_MTIME;
2993
2994         result = osd_quota_transfer(inode, attr);
2995         if (result)
2996                 return;
2997
2998         if (attr->la_valid != 0) {
2999                 result = osd_inode_setattr(info->oti_env, inode, attr);
3000                 /*
3001                  * The osd_inode_setattr() should always succeed here.  The
3002                  * only error that could be returned is EDQUOT when we are
3003                  * trying to change the UID or GID of the inode. However, this
3004                  * should not happen since quota enforcement is no longer
3005                  * enabled on ldiskfs (lquota takes care of it).
3006                  */
3007                 LASSERTF(result == 0, "%d\n", result);
3008                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3009         }
3010
3011         attr->la_valid = valid;
3012 }
3013
3014 /**
3015  * Helper function for osd_create()
3016  *
3017  * \retval 0, on success
3018  */
3019 static int __osd_create(struct osd_thread_info *info, struct osd_object *obj,
3020                         struct lu_attr *attr, struct dt_allocation_hint *hint,
3021                         struct dt_object_format *dof, struct thandle *th)
3022 {
3023         int     result;
3024         __u32   umask;
3025
3026         osd_trans_exec_op(info->oti_env, th, OSD_OT_CREATE);
3027
3028         /* we drop umask so that permissions we pass are not affected */
3029         umask = current->fs->umask;
3030         current->fs->umask = 0;
3031
3032         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
3033                                                   th);
3034         if (likely(obj->oo_inode != NULL)) {
3035                 LASSERT(obj->oo_inode->i_state & I_NEW);
3036
3037                 /* Unlock the inode before attr initialization to avoid
3038                  * unnecessary dqget operations. LU-6378 */
3039                 unlock_new_inode(obj->oo_inode);
3040         }
3041
3042         if (likely(result == 0)) {
3043                 osd_attr_init(info, obj, attr, dof);
3044                 osd_object_init0(obj);
3045         }
3046
3047         /* restore previous umask value */
3048         current->fs->umask = umask;
3049
3050         osd_trans_exec_check(info->oti_env, th, OSD_OT_CREATE);
3051
3052         return result;
3053 }
3054
3055 /**
3056  * Helper function for osd_create()
3057  *
3058  * \retval 0, on success
3059  */
3060 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
3061                            const struct lu_fid *fid, struct thandle *th)
3062 {
3063         struct osd_thread_info *info = osd_oti_get(env);
3064         struct osd_inode_id    *id   = &info->oti_id;
3065         struct osd_device      *osd  = osd_obj2dev(obj);
3066         struct osd_thandle     *oh;
3067         int                     rc;
3068
3069         LASSERT(obj->oo_inode != NULL);
3070
3071         oh = container_of0(th, struct osd_thandle, ot_super);
3072         LASSERT(oh->ot_handle);
3073         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3074
3075         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
3076         rc = osd_oi_insert(info, osd, fid, id, oh->ot_handle,
3077                            OI_CHECK_FLD, NULL);
3078         osd_trans_exec_check(env, th, OSD_OT_INSERT);
3079
3080         return rc;
3081 }
3082
3083 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
3084                    u64 seq, struct lu_seq_range *range)
3085 {
3086         struct seq_server_site  *ss = osd_seq_site(osd);
3087
3088         if (fid_seq_is_idif(seq)) {
3089                 fld_range_set_ost(range);
3090                 range->lsr_index = idif_ost_idx(seq);
3091                 return 0;
3092         }
3093
3094         if (!fid_seq_in_fldb(seq)) {
3095                 fld_range_set_mdt(range);
3096                 if (ss != NULL)
3097                         /* FIXME: If ss is NULL, it suppose not get lsr_index
3098                          * at all */
3099                         range->lsr_index = ss->ss_node_id;
3100                 return 0;
3101         }
3102
3103         LASSERT(ss != NULL);
3104         fld_range_set_any(range);
3105         /* OSD will only do local fld lookup */
3106         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
3107 }
3108
3109 static int osd_declare_create(const struct lu_env *env, struct dt_object *dt,
3110                               struct lu_attr *attr,
3111                               struct dt_allocation_hint *hint,
3112                               struct dt_object_format *dof,
3113                               struct thandle *handle)
3114 {
3115         struct osd_thandle *oh;
3116         int rc;
3117         ENTRY;
3118
3119         LASSERT(handle != NULL);
3120
3121         oh = container_of0(handle, struct osd_thandle, ot_super);
3122         LASSERT(oh->ot_handle == NULL);
3123
3124         /* EA object consumes more credits than regular object: osd_mk_index
3125          * vs. osd_mkreg: osd_mk_index will create 2 blocks for root_node and
3126          * leaf_node, could involves the block, block bitmap, groups, GDT
3127          * change for each block, so add 4 * 2 credits in that case. */
3128         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
3129                              osd_dto_credits_noquota[DTO_OBJECT_CREATE] +
3130                              (dof->dof_type == DFT_INDEX) ? 4 * 2 : 0);
3131         /* Reuse idle OI block may cause additional one OI block
3132          * to be changed. */
3133         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3134                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
3135
3136         if (!attr)
3137                 RETURN(0);
3138
3139         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid,
3140                                    attr->la_projid, 1, oh, osd_dt_obj(dt),
3141                                    NULL, OSD_QID_INODE);
3142         if (rc != 0)
3143                 RETURN(rc);
3144
3145         /* will help to find FID->ino mapping at dt_insert() */
3146         rc = osd_idc_find_and_init(env, osd_obj2dev(osd_dt_obj(dt)),
3147                                    osd_dt_obj(dt));
3148
3149         RETURN(rc);
3150 }
3151
3152 /**
3153  * Called to destroy on-disk representation of the object
3154  *
3155  * Concurrency: must be locked
3156  */
3157 static int osd_declare_destroy(const struct lu_env *env, struct dt_object *dt,
3158                                struct thandle *th)
3159 {
3160         struct osd_object  *obj = osd_dt_obj(dt);
3161         struct inode       *inode = obj->oo_inode;
3162         struct osd_thandle *oh;
3163         int                 rc;
3164         ENTRY;
3165
3166         if (inode == NULL)
3167                 RETURN(-ENOENT);
3168
3169         oh = container_of0(th, struct osd_thandle, ot_super);
3170         LASSERT(oh->ot_handle == NULL);
3171
3172         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
3173                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
3174         /* Recycle idle OI leaf may cause additional three OI blocks
3175          * to be changed. */
3176         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3177                 osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3178                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
3179         /* one less inode */
3180         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3181                                    i_projid_read(inode), -1, oh, obj, NULL,
3182                                    OSD_QID_INODE);
3183         if (rc)
3184                 RETURN(rc);
3185         /* data to be truncated */
3186         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3187                                    i_projid_read(inode), 0, oh, obj, NULL,
3188                                    OSD_QID_BLK);
3189         if (rc)
3190                 RETURN(rc);
3191
3192         /* will help to find FID->ino when this object is being
3193          * added to PENDING/ */
3194         rc = osd_idc_find_and_init(env, osd_obj2dev(obj), obj);
3195
3196         RETURN(rc);
3197 }
3198
3199 static int osd_destroy(const struct lu_env *env, struct dt_object *dt,
3200                        struct thandle *th)
3201 {
3202         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
3203         struct osd_object *obj = osd_dt_obj(dt);
3204         struct inode *inode = obj->oo_inode;
3205         struct osd_device *osd = osd_obj2dev(obj);
3206         struct osd_thandle *oh;
3207         int result;
3208         ENTRY;
3209
3210         oh = container_of0(th, struct osd_thandle, ot_super);
3211         LASSERT(oh->ot_handle);
3212         LASSERT(inode);
3213         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
3214
3215         if (unlikely(fid_is_acct(fid)))
3216                 RETURN(-EPERM);
3217
3218         if (S_ISDIR(inode->i_mode)) {
3219                 LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1 ||
3220                         inode->i_nlink == 2);
3221                 /* it will check/delete the inode from remote parent,
3222                  * how to optimize it? unlink performance impaction XXX */
3223                 result = osd_delete_from_remote_parent(env, osd, obj, oh);
3224                 if (result != 0)
3225                         CERROR("%s: delete inode "DFID": rc = %d\n",
3226                                osd_name(osd), PFID(fid), result);
3227
3228                 spin_lock(&obj->oo_guard);
3229                 clear_nlink(inode);
3230                 spin_unlock(&obj->oo_guard);
3231                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3232         }
3233
3234         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
3235
3236         ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
3237
3238         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3239                 result = osd_oi_delete(osd_oti_get(env), osd, fid,
3240                                        oh->ot_handle, OI_CHECK_FLD);
3241
3242         osd_trans_exec_check(env, th, OSD_OT_DESTROY);
3243         /* XXX: add to ext3 orphan list */
3244         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
3245
3246         /* not needed in the cache anymore */
3247         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
3248         obj->oo_destroyed = 1;
3249
3250         RETURN(0);
3251 }
3252
3253 /**
3254  * Put the fid into lustre_mdt_attrs, and then place the structure
3255  * inode's ea. This fid should not be altered during the life time
3256  * of the inode.
3257  *
3258  * \retval +ve, on success
3259  * \retval -ve, on error
3260  *
3261  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
3262  */
3263 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
3264                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
3265 {
3266         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3267         struct lustre_mdt_attrs *lma = &loa->loa_lma;
3268         int rc;
3269         ENTRY;
3270
3271         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
3272                 RETURN(0);
3273
3274         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_OST_EA_FID_SET))
3275                 rc = -ENOMEM;
3276
3277         lustre_loa_init(loa, fid, compat, incompat);
3278         lustre_loa_swab(loa, false);
3279
3280         /* For the OST device with 256 bytes inode size by default,
3281          * the PFID EA will be stored together with LMA EA to avoid
3282          * performance trouble. Otherwise the PFID EA can be stored
3283          * independently. LU-8998 */
3284         if ((compat & LMAC_FID_ON_OST) &&
3285             LDISKFS_INODE_SIZE(inode->i_sb) <= 256)
3286                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3287                                      sizeof(*loa), XATTR_CREATE);
3288         else
3289                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3290                                      sizeof(*lma), XATTR_CREATE);
3291         /* LMA may already exist, but we need to check that all the
3292          * desired compat/incompat flags have been added. */
3293         if (unlikely(rc == -EEXIST)) {
3294                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
3295                                      XATTR_NAME_LMA, (void *)loa, sizeof(*loa));
3296                 if (rc < 0)
3297                         RETURN(rc);
3298
3299                 if (rc < sizeof(*lma))
3300                         RETURN(-EINVAL);
3301
3302                 lustre_loa_swab(loa, true);
3303                 if (lu_fid_eq(fid, &lma->lma_self_fid) &&
3304                     ((compat == 0 && incompat == 0) ||
3305                      (!(~lma->lma_compat & compat) &&
3306                       !(~lma->lma_incompat & incompat))))
3307                         RETURN(0);
3308
3309                 lma->lma_self_fid = *fid;
3310                 lma->lma_compat |= compat;
3311                 lma->lma_incompat |= incompat;
3312                 if (rc == sizeof(*lma)) {
3313                         lustre_lma_swab(lma);
3314                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3315                                              sizeof(*lma), XATTR_REPLACE);
3316                 } else {
3317                         lustre_loa_swab(loa, false);
3318                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3319                                              sizeof(*loa), XATTR_REPLACE);
3320                 }
3321         }
3322
3323         RETURN(rc);
3324 }
3325
3326 /**
3327  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
3328  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
3329  * To have compatilibility with 1.8 ldiskfs driver we need to have
3330  * magic number at start of fid data.
3331  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
3332  * its inmemory API.
3333  */
3334 static void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
3335                                          const struct lu_fid *fid)
3336 {
3337         if (!fid_is_namespace_visible(fid) ||
3338             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
3339                 param->edp_magic = 0;
3340                 return;
3341         }
3342
3343         param->edp_magic = LDISKFS_LUFID_MAGIC;
3344         param->edp_len =  sizeof(struct lu_fid) + 1;
3345         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
3346 }
3347
3348 /**
3349  * Try to read the fid from inode ea into dt_rec.
3350  *
3351  * \param fid object fid.
3352  *
3353  * \retval 0 on success
3354  */
3355 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
3356                           __u32 ino, struct lu_fid *fid,
3357                           struct osd_inode_id *id)
3358 {
3359         struct osd_thread_info *info  = osd_oti_get(env);
3360         struct inode           *inode;
3361         ENTRY;
3362
3363         osd_id_gen(id, ino, OSD_OII_NOGEN);
3364         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
3365         if (IS_ERR(inode))
3366                 RETURN(PTR_ERR(inode));
3367
3368         iput(inode);
3369         RETURN(0);
3370 }
3371
3372 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
3373                                         struct inode *dir,
3374                                         struct inode *parent_dir,
3375                                         const struct lu_fid *dot_fid,
3376                                         const struct lu_fid *dot_dot_fid,
3377                                         struct osd_thandle *oth)
3378 {
3379         struct ldiskfs_dentry_param *dot_ldp;
3380         struct ldiskfs_dentry_param *dot_dot_ldp;
3381         __u32 saved_nlink = dir->i_nlink;
3382         int rc;
3383
3384         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
3385         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
3386
3387         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
3388         dot_ldp->edp_magic = 0;
3389
3390         rc = ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
3391                                     dir, dot_ldp, dot_dot_ldp);
3392         /* The ldiskfs_add_dot_dotdot() may dir->i_nlink as 2, then
3393          * the subseqent ref_add() will increase the dir->i_nlink
3394          * as 3. That is incorrect for new created directory.
3395          *
3396          * It looks like hack, because we want to make the OSD API
3397          * to be order-independent for new created directory object
3398          * between dt_insert(..) and ref_add() operations.
3399          *
3400          * Here, we only restore the in-RAM dir-inode's nlink attr,
3401          * becuase if the nlink attr is not 2, then there will be
3402          * ref_add() called following the dt_insert(..), such call
3403          * will make both the in-RAM and on-disk dir-inode's nlink
3404          * attr to be set as 2. LU-7447 */
3405         set_nlink(dir, saved_nlink);
3406         return rc;
3407 }
3408
3409 /**
3410  * Create an local agent inode for remote entry
3411  */
3412 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
3413                                                   struct osd_device *osd,
3414                                                   struct osd_object *pobj,
3415                                                   const struct lu_fid *fid,
3416                                                   __u32 type,
3417                                                   struct thandle *th)
3418 {
3419         struct osd_thread_info  *info = osd_oti_get(env);
3420         struct inode            *local;
3421         struct osd_thandle      *oh;
3422         int                     rc;
3423         ENTRY;
3424
3425         LASSERT(th);
3426         oh = container_of(th, struct osd_thandle, ot_super);
3427         LASSERT(oh->ot_handle->h_transaction != NULL);
3428
3429         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, type);
3430         if (IS_ERR(local)) {
3431                 CERROR("%s: create local error %d\n", osd_name(osd),
3432                        (int)PTR_ERR(local));
3433                 RETURN(local);
3434         }
3435
3436         /* restore i_gid in case S_ISGID is set, we will inherit S_ISGID and set
3437          * correct gid on remote file, not agent here */
3438         local->i_gid = current_fsgid();
3439         ldiskfs_set_inode_state(local, LDISKFS_STATE_LUSTRE_NOSCRUB);
3440         unlock_new_inode(local);
3441
3442         /* Agent inode should not have project ID */
3443 #ifdef  HAVE_PROJECT_QUOTA
3444         if (LDISKFS_I(pobj->oo_inode)->i_flags & LUSTRE_PROJINHERIT_FL) {
3445                 rc = __ldiskfs_ioctl_setproject(local, 0);
3446                 if (rc) {
3447                         CERROR("%s: quota transfer failed: rc = %d. Is project "
3448                                "quota enforcement enabled on the ldiskfs "
3449                                "filesystem?\n", local->i_sb->s_id, rc);
3450                         RETURN(ERR_PTR(rc));
3451                 }
3452         }
3453 #endif
3454         /* Set special LMA flag for local agent inode */
3455         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
3456         if (rc != 0) {
3457                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
3458                        osd_name(osd), PFID(fid), rc);
3459                 RETURN(ERR_PTR(rc));
3460         }
3461
3462         if (!S_ISDIR(type))
3463                 RETURN(local);
3464
3465         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
3466                                          lu_object_fid(&pobj->oo_dt.do_lu),
3467                                          fid, oh);
3468         if (rc != 0) {
3469                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
3470                         osd_name(osd), PFID(fid), rc);
3471                 RETURN(ERR_PTR(rc));
3472         }
3473
3474         RETURN(local);
3475 }
3476
3477 /**
3478  * when direntry is deleted, we have to take care of possible agent inode
3479  * referenced by that. unfortunately we can't do this at that point:
3480  * iget() within a running transaction leads to deadlock and we better do
3481  * not call that every delete declaration to save performance. so we put
3482  * a potention agent inode on a list and process that once the transaction
3483  * is over. Notice it's not any worse in terms of real orphans as regular
3484  * object destroy doesn't put inodes on the on-disk orphan list. this should
3485  * be addressed separately
3486  */
3487 static int osd_schedule_agent_inode_removal(const struct lu_env *env,
3488                                             struct osd_thandle *oh,
3489                                             __u32 ino)
3490 {
3491         struct osd_device      *osd = osd_dt_dev(oh->ot_super.th_dev);
3492         struct osd_obj_orphan *oor;
3493
3494         OBD_ALLOC_PTR(oor);
3495         if (oor == NULL)
3496                 return -ENOMEM;
3497
3498         oor->oor_ino = ino;
3499         oor->oor_env = (struct lu_env *)env;
3500         spin_lock(&osd->od_osfs_lock);
3501         list_add(&oor->oor_list, &osd->od_orphan_list);
3502         spin_unlock(&osd->od_osfs_lock);
3503
3504         oh->ot_remove_agents = 1;
3505
3506         return 0;
3507
3508 }
3509
3510 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
3511                                                 struct osd_device *osd)
3512 {
3513         struct osd_thread_info *info = osd_oti_get(env);
3514         struct osd_obj_orphan *oor, *tmp;
3515         struct osd_inode_id id;
3516         struct list_head list;
3517         struct inode *inode;
3518         struct lu_fid fid;
3519         handle_t *jh;
3520         __u32 ino;
3521
3522         INIT_LIST_HEAD(&list);
3523
3524         spin_lock(&osd->od_osfs_lock);
3525         list_for_each_entry_safe(oor, tmp, &osd->od_orphan_list, oor_list) {
3526                 if (oor->oor_env == env) {
3527                         list_del(&oor->oor_list);
3528                         list_add(&oor->oor_list, &list);
3529                 }
3530         }
3531         spin_unlock(&osd->od_osfs_lock);
3532
3533         list_for_each_entry_safe(oor, tmp, &list, oor_list) {
3534
3535                 ino = oor->oor_ino;
3536
3537                 list_del(&oor->oor_list);
3538                 OBD_FREE_PTR(oor);
3539
3540                 osd_id_gen(&id, ino, OSD_OII_NOGEN);
3541                 inode = osd_iget_fid(info, osd, &id, &fid);
3542                 if (IS_ERR(inode))
3543                         continue;
3544
3545                 if (!osd_remote_fid(env, osd, &fid)) {
3546                         iput(inode);
3547                         continue;
3548                 }
3549
3550                 jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC, 1);
3551                 clear_nlink(inode);
3552                 mark_inode_dirty(inode);
3553                 ldiskfs_journal_stop(jh);
3554                 iput(inode);
3555         }
3556
3557         return 0;
3558 }
3559
3560 /**
3561  * OSD layer object create function for OST objects (b=11826).
3562  *
3563  * The FID is inserted into inode xattr here.
3564  *
3565  * \retval   0, on success
3566  * \retval -ve, on error
3567  */
3568 static int osd_create(const struct lu_env *env, struct dt_object *dt,
3569                       struct lu_attr *attr, struct dt_allocation_hint *hint,
3570                       struct dt_object_format *dof, struct thandle *th)
3571 {
3572         const struct lu_fid     *fid    = lu_object_fid(&dt->do_lu);
3573         struct osd_object       *obj    = osd_dt_obj(dt);
3574         struct osd_thread_info  *info   = osd_oti_get(env);
3575         int                      result, on_ost = 0;
3576
3577         ENTRY;
3578
3579         if (dt_object_exists(dt))
3580                 RETURN(-EEXIST);
3581
3582         LINVRNT(osd_invariant(obj));
3583         LASSERT(!dt_object_remote(dt));
3584         LASSERT(osd_is_write_locked(env, obj));
3585         LASSERT(th != NULL);
3586
3587         if (unlikely(fid_is_acct(fid)))
3588                 /* Quota files can't be created from the kernel any more,
3589                  * 'tune2fs -O quota' will take care of creating them */
3590                 RETURN(-EPERM);
3591
3592         result = __osd_create(info, obj, attr, hint, dof, th);
3593         if (result == 0) {
3594                 if (fid_is_idif(fid) &&
3595                     !osd_dev(dt->do_lu.lo_dev)->od_index_in_idif) {
3596                         struct lu_fid *tfid = &info->oti_fid;
3597                         struct ost_id *oi   = &info->oti_ostid;
3598
3599                         fid_to_ostid(fid, oi);
3600                         ostid_to_fid(tfid, oi, 0);
3601                         on_ost = 1;
3602                         result = osd_ea_fid_set(info, obj->oo_inode, tfid,
3603                                                 LMAC_FID_ON_OST, 0);
3604                 } else {
3605                         on_ost = fid_is_on_ost(info, osd_obj2dev(obj),
3606                                                fid, OI_CHECK_FLD);
3607                         result = osd_ea_fid_set(info, obj->oo_inode, fid,
3608                                                 on_ost ? LMAC_FID_ON_OST : 0,
3609                                                 0);
3610                 }
3611                 if (obj->oo_dt.do_body_ops == &osd_body_ops_new)
3612                         obj->oo_dt.do_body_ops = &osd_body_ops;
3613         }
3614
3615         if (result == 0)
3616                 result = __osd_oi_insert(env, obj, fid, th);
3617
3618         /* a small optimization - dt_insert() isn't usually applied
3619          * to OST objects, so we don't need to cache OI mapping for
3620          * OST objects */
3621         if (result == 0 && on_ost == 0) {
3622                 struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
3623                 result = osd_idc_find_and_init(env, osd, obj);
3624                 LASSERT(result == 0);
3625         }
3626
3627         LASSERT(ergo(result == 0,
3628                      dt_object_exists(dt) && !dt_object_remote(dt)));
3629         LINVRNT(osd_invariant(obj));
3630         RETURN(result);
3631 }
3632
3633 static int osd_declare_ref_add(const struct lu_env *env, struct dt_object *dt,
3634                                struct thandle *handle)
3635 {
3636         struct osd_thandle *oh;
3637
3638         /* it's possible that object doesn't exist yet */
3639         LASSERT(handle != NULL);
3640
3641         oh = container_of0(handle, struct osd_thandle, ot_super);
3642         LASSERT(oh->ot_handle == NULL);
3643
3644         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
3645                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
3646
3647         osd_idc_find_and_init(env, osd_dev(dt->do_lu.lo_dev), osd_dt_obj(dt));
3648
3649         return 0;
3650 }
3651
3652 /*
3653  * Concurrency: @dt is write locked.
3654  */
3655 static int osd_ref_add(const struct lu_env *env, struct dt_object *dt,
3656                        struct thandle *th)
3657 {
3658         struct osd_object  *obj = osd_dt_obj(dt);
3659         struct inode       *inode = obj->oo_inode;
3660         struct osd_thandle *oh;
3661         int                 rc = 0;
3662
3663         if (!dt_object_exists(dt) || obj->oo_destroyed)
3664                 return -ENOENT;
3665
3666         LINVRNT(osd_invariant(obj));
3667         LASSERT(!dt_object_remote(dt));
3668         LASSERT(osd_is_write_locked(env, obj));
3669         LASSERT(th != NULL);
3670
3671         oh = container_of0(th, struct osd_thandle, ot_super);
3672         LASSERT(oh->ot_handle != NULL);
3673
3674         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
3675
3676         CDEBUG(D_INODE, DFID" increase nlink %d\n",
3677                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
3678         /*
3679          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
3680          * (65000) subdirectories by storing "1" in i_nlink if the link count
3681          * would otherwise overflow. Directory tranversal tools understand
3682          * that (st_nlink == 1) indicates that the filesystem dose not track
3683          * hard links count on the directory, and will not abort subdirectory
3684          * scanning early once (st_nlink - 2) subdirs have been found.
3685          *
3686          * This also has to properly handle the case of inodes with nlink == 0
3687          * in case they are being linked into the PENDING directory
3688          */
3689         spin_lock(&obj->oo_guard);
3690         if (unlikely(inode->i_nlink == 0))
3691                 /* inc_nlink from 0 may cause WARN_ON */
3692                 set_nlink(inode, 1);
3693         else {
3694                 ldiskfs_inc_count(oh->ot_handle, inode);
3695                 if (!S_ISDIR(inode->i_mode))
3696                         LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
3697         }
3698         spin_unlock(&obj->oo_guard);
3699
3700         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3701         LINVRNT(osd_invariant(obj));
3702
3703         osd_trans_exec_check(env, th, OSD_OT_REF_ADD);
3704
3705         return rc;
3706 }
3707
3708 static int osd_declare_ref_del(const struct lu_env *env, struct dt_object *dt,
3709                                struct thandle *handle)
3710 {
3711         struct osd_thandle *oh;
3712
3713         if (!dt_object_exists(dt))
3714                 return -ENOENT;
3715
3716         LASSERT(!dt_object_remote(dt));
3717         LASSERT(handle != NULL);
3718
3719         oh = container_of0(handle, struct osd_thandle, ot_super);
3720         LASSERT(oh->ot_handle == NULL);
3721
3722         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
3723                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
3724
3725         return 0;
3726 }
3727
3728 /*
3729  * Concurrency: @dt is write locked.
3730  */
3731 static int osd_ref_del(const struct lu_env *env, struct dt_object *dt,
3732                        struct thandle *th)
3733 {
3734         struct osd_object       *obj = osd_dt_obj(dt);
3735         struct inode            *inode = obj->oo_inode;
3736         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
3737         struct osd_thandle      *oh;
3738
3739         if (!dt_object_exists(dt))
3740                 return -ENOENT;
3741
3742         LINVRNT(osd_invariant(obj));
3743         LASSERT(!dt_object_remote(dt));
3744         LASSERT(osd_is_write_locked(env, obj));
3745         LASSERT(th != NULL);
3746
3747         oh = container_of0(th, struct osd_thandle, ot_super);
3748         LASSERT(oh->ot_handle != NULL);
3749
3750         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
3751
3752         spin_lock(&obj->oo_guard);
3753         /* That can be result of upgrade from old Lustre version and
3754          * applied only to local files.  Just skip this ref_del call.
3755          * ext4_unlink() only treats this as a warning, don't LASSERT here.*/
3756         if (inode->i_nlink == 0) {
3757                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
3758                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
3759                              ", maybe an upgraded file? (LU-3915)\n",
3760                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
3761                 spin_unlock(&obj->oo_guard);
3762                 return 0;
3763         }
3764
3765         CDEBUG(D_INODE, DFID" decrease nlink %d\n",
3766                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
3767
3768         ldiskfs_dec_count(oh->ot_handle, inode);
3769         spin_unlock(&obj->oo_guard);
3770
3771         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3772         LINVRNT(osd_invariant(obj));
3773
3774         osd_trans_exec_check(env, th, OSD_OT_REF_DEL);
3775
3776         return 0;
3777 }
3778
3779 /*
3780  * Concurrency: @dt is read locked.
3781  */
3782 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
3783                          struct lu_buf *buf, const char *name)
3784 {
3785         struct osd_object      *obj    = osd_dt_obj(dt);
3786         struct inode           *inode  = obj->oo_inode;
3787         struct osd_thread_info *info   = osd_oti_get(env);
3788         struct dentry          *dentry = &info->oti_obj_dentry;
3789         bool                    cache_xattr = false;
3790         int                     rc;
3791
3792         LASSERT(buf);
3793
3794         /* version get is not real XATTR but uses xattr API */
3795         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3796                 dt_obj_version_t *ver = buf->lb_buf;
3797
3798                 /* for version we are just using xattr API but change inode
3799                  * field instead */
3800                 if (buf->lb_len == 0)
3801                         return sizeof(dt_obj_version_t);
3802
3803                 if (buf->lb_len < sizeof(dt_obj_version_t))
3804                         return -ERANGE;
3805
3806                 CDEBUG(D_INODE, "Get version %#llx for inode %lu\n",
3807                        LDISKFS_I(inode)->i_fs_version, inode->i_ino);
3808
3809                 *ver = LDISKFS_I(inode)->i_fs_version;
3810
3811                 return sizeof(dt_obj_version_t);
3812         }
3813
3814         if (!dt_object_exists(dt))
3815                 return -ENOENT;
3816
3817         LASSERT(!dt_object_remote(dt));
3818         LASSERT(inode->i_op != NULL);
3819         LASSERT(inode->i_op->getxattr != NULL);
3820
3821         if (strcmp(name, XATTR_NAME_LOV) == 0 ||
3822             strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0)
3823                 cache_xattr = true;
3824
3825         if (cache_xattr) {
3826                 rc = osd_oxc_get(obj, name, buf);
3827                 if (rc != -ENOENT)
3828                         return rc;
3829         }
3830
3831         rc = __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
3832         if (rc == -ENODATA && strcmp(name, XATTR_NAME_FID) == 0) {
3833                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3834                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
3835                 struct filter_fid *ff;
3836                 struct ost_layout *ol;
3837
3838                 if (!osd_dev(dt->do_lu.lo_dev)->od_is_ost)
3839                         goto cache;
3840
3841                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
3842                 if (rc)
3843                         return rc;
3844
3845                 if (!(lma->lma_compat & LMAC_STRIPE_INFO)) {
3846                         rc = -ENODATA;
3847                         goto cache;
3848                 }
3849
3850                 rc = sizeof(*ff);
3851                 if (buf->lb_len == 0 || !buf->lb_buf)
3852                         return rc;
3853
3854                 if (buf->lb_len < rc)
3855                         return -ERANGE;
3856
3857                 ff = buf->lb_buf;
3858                 ol = &ff->ff_layout;
3859                 ol->ol_stripe_count = cpu_to_le32(loa->loa_parent_fid.f_ver >>
3860                                                   PFID_STRIPE_IDX_BITS);
3861                 ol->ol_stripe_size = cpu_to_le32(loa->loa_stripe_size);
3862                 loa->loa_parent_fid.f_ver &= PFID_STRIPE_COUNT_MASK;
3863                 fid_cpu_to_le(&ff->ff_parent, &loa->loa_parent_fid);
3864                 if (lma->lma_compat & LMAC_COMP_INFO) {
3865                         ol->ol_comp_start = cpu_to_le64(loa->loa_comp_start);
3866                         ol->ol_comp_end = cpu_to_le64(loa->loa_comp_end);
3867                         ol->ol_comp_id = cpu_to_le32(loa->loa_comp_id);
3868                 } else {
3869                         ol->ol_comp_start = 0;
3870                         ol->ol_comp_end = 0;
3871                         ol->ol_comp_id = 0;
3872                 }
3873         }
3874
3875 cache:
3876         if (cache_xattr) {
3877                 if (rc == -ENOENT || rc == -ENODATA)
3878                         osd_oxc_add(obj, name, NULL, 0);
3879                 else if (rc > 0 && buf->lb_buf != NULL)
3880                         osd_oxc_add(obj, name, buf->lb_buf, rc);
3881         }
3882
3883         return rc;
3884 }
3885
3886 static int osd_declare_xattr_set(const struct lu_env *env,
3887                                  struct dt_object *dt,
3888                                  const struct lu_buf *buf, const char *name,
3889                                  int fl, struct thandle *handle)
3890 {
3891         struct osd_thandle *oh;
3892         int credits = 0;
3893         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
3894
3895         LASSERT(handle != NULL);
3896
3897         oh = container_of0(handle, struct osd_thandle, ot_super);
3898         LASSERT(oh->ot_handle == NULL);
3899
3900         if (strcmp(name, XATTR_NAME_LMA) == 0) {
3901                 /* For non-upgrading case, the LMA is set first and
3902                  * usually fit inode. But for upgrade case, the LMA
3903                  * may be in another separated EA block. */
3904                 if (dt_object_exists(dt)) {
3905                         if (fl == LU_XATTR_REPLACE)
3906                                 credits = 1;
3907                         else
3908                                 goto upgrade;
3909                 }
3910         } else if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3911                 credits = 1;
3912         } else if (strcmp(name, XATTR_NAME_FID) == 0) {
3913                 /* We may need to delete the old PFID EA. */
3914                 credits = LDISKFS_MAXQUOTAS_DEL_BLOCKS(sb);
3915                 if (fl == LU_XATTR_REPLACE)
3916                         credits += 1;
3917                 else
3918                         goto upgrade;
3919         } else {
3920
3921 upgrade:
3922                 credits += osd_dto_credits_noquota[DTO_XATTR_SET];
3923
3924                 if (buf != NULL) {
3925                         ssize_t buflen;
3926
3927                         if (buf->lb_buf == NULL && dt_object_exists(dt)) {
3928                                 /* learn xattr size from osd_xattr_get if
3929                                    attribute has not been read yet */
3930                                 buflen = __osd_xattr_get(
3931                                     osd_dt_obj(dt)->oo_inode,
3932                                     &osd_oti_get(env)->oti_obj_dentry,
3933                                     name, NULL, 0);
3934                                 if (buflen < 0)
3935                                         buflen = 0;
3936                         } else {
3937                                 buflen = buf->lb_len;
3938                         }
3939
3940                         if (buflen > sb->s_blocksize) {
3941                                 credits += osd_calc_bkmap_credits(
3942                                     sb, NULL, 0, -1,
3943                                     (buflen + sb->s_blocksize - 1) >>
3944                                     sb->s_blocksize_bits);
3945                         }
3946                 }
3947                 /*
3948                  * xattr set may involve inode quota change, reserve credits for
3949                  * dquot_initialize()
3950                  */
3951                 credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
3952         }
3953
3954         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET, credits);
3955
3956         return 0;
3957 }
3958
3959 /*
3960  * Concurrency: @dt is write locked.
3961  */
3962 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
3963                          const struct lu_buf *buf, const char *name, int fl,
3964                          struct thandle *handle)
3965 {
3966         struct osd_object *obj = osd_dt_obj(dt);
3967         struct inode *inode = obj->oo_inode;
3968         struct osd_thread_info *info = osd_oti_get(env);
3969         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3970         struct lustre_mdt_attrs *lma = &loa->loa_lma;
3971         int fs_flags = 0;
3972         int len;
3973         int rc;
3974         ENTRY;
3975
3976         LASSERT(handle);
3977         LASSERT(buf);
3978
3979         /* version set is not real XATTR */
3980         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3981                 dt_obj_version_t *version = buf->lb_buf;
3982
3983                 /* for version we are just using xattr API but change inode
3984                  * field instead */
3985                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
3986
3987                 CDEBUG(D_INODE, "Set version %#llx (old %#llx) for inode %lu\n",
3988                        *version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
3989
3990                 LDISKFS_I(inode)->i_fs_version = *version;
3991                 /* Version is set after all inode operations are finished,
3992                  * so we should mark it dirty here */
3993                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3994
3995                 RETURN(0);
3996         }
3997
3998         CDEBUG(D_INODE, DFID" set xattr '%s' with size %zu\n",
3999                PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
4000
4001         len = buf->lb_len;
4002         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
4003         if (fl & LU_XATTR_REPLACE)
4004                 fs_flags |= XATTR_REPLACE;
4005
4006         if (fl & LU_XATTR_CREATE)
4007                 fs_flags |= XATTR_CREATE;
4008
4009         /* For the OST device with 256 bytes inode size by default,
4010          * the PFID EA will be stored together with LMA EA to avoid
4011          * performance trouble. Otherwise the PFID EA can be stored
4012          * independently. LU-8998 */
4013         if (strcmp(name, XATTR_NAME_FID) == 0 &&
4014             LDISKFS_INODE_SIZE(inode->i_sb) <= 256) {
4015                 struct dentry *dentry = &info->oti_obj_dentry;
4016                 struct filter_fid *ff;
4017                 struct ost_layout *ol;
4018                 int fl;
4019
4020                 LASSERT(osd_dev(dt->do_lu.lo_dev)->od_is_ost);
4021
4022                 ff = buf->lb_buf;
4023                 ol = &ff->ff_layout;
4024                 /* Old client does not send stripe information, store
4025                  * the PFID EA on disk directly. */
4026                 if (buf->lb_len == sizeof(struct lu_fid) ||
4027                     ol->ol_stripe_size == 0) {
4028                         len = sizeof(struct lu_fid);
4029                         goto set;
4030                 }
4031
4032                 if (buf->lb_len != sizeof(*ff))
4033                         RETURN(-EINVAL);
4034
4035                 rc = osd_get_lma(info, inode, dentry, loa);
4036                 if (unlikely(rc == -ENODATA)) {
4037                         /* Usually for upgarding from old device */
4038                         lustre_loa_init(loa, lu_object_fid(&dt->do_lu),
4039                                         LMAC_FID_ON_OST, 0);
4040                         fl = XATTR_CREATE;
4041                 } else if (rc) {
4042                         RETURN(rc);
4043                 } else {
4044                         fl = XATTR_REPLACE;
4045                 }
4046
4047                 fid_le_to_cpu(&loa->loa_parent_fid, &ff->ff_parent);
4048                 loa->loa_parent_fid.f_ver |= le32_to_cpu(ol->ol_stripe_count) <<
4049                                              PFID_STRIPE_IDX_BITS;
4050                 loa->loa_stripe_size = le32_to_cpu(ol->ol_stripe_size);
4051                 lma->lma_compat |= LMAC_STRIPE_INFO;
4052                 if (ol->ol_comp_id != 0) {
4053                         loa->loa_comp_id = le32_to_cpu(ol->ol_comp_id);
4054                         loa->loa_comp_start = le64_to_cpu(ol->ol_comp_start);
4055                         loa->loa_comp_end = le64_to_cpu(ol->ol_comp_end);
4056                         lma->lma_compat |= LMAC_COMP_INFO;
4057                 }
4058
4059                 lustre_loa_swab(loa, false);
4060
4061                 /* Remove old PFID EA entry firstly. */
4062                 ll_vfs_dq_init(inode);
4063                 rc = inode->i_op->removexattr(dentry, name);
4064                 if (rc && rc != -ENODATA)
4065                         RETURN(rc);
4066
4067                 /* Store the PFID EA inside the LMA EA. */
4068                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
4069                                      sizeof(*loa), fl);
4070
4071                 RETURN(rc);
4072         } else if (strcmp(name, XATTR_NAME_LMV) == 0) {
4073                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
4074                 if (rc)
4075                         RETURN(rc);
4076
4077                 lma->lma_incompat |= LMAI_STRIPED;
4078                 lustre_lma_swab(lma);
4079                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4080                                      sizeof(*lma), XATTR_REPLACE);
4081                 if (rc != 0)
4082                         RETURN(rc);
4083         }
4084
4085 set:
4086         rc = __osd_xattr_set(info, inode, name, buf->lb_buf, len, fs_flags);
4087         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
4088
4089         if (rc == 0 &&
4090             (strcmp(name, XATTR_NAME_LOV) == 0 ||
4091              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
4092                 osd_oxc_add(obj, name, buf->lb_buf, buf->lb_len);
4093
4094         return rc;
4095 }
4096
4097 /*
4098  * Concurrency: @dt is read locked.
4099  */
4100 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
4101                           const struct lu_buf *buf)
4102 {
4103         struct osd_object      *obj    = osd_dt_obj(dt);
4104         struct inode           *inode  = obj->oo_inode;
4105         struct osd_thread_info *info   = osd_oti_get(env);
4106         struct dentry          *dentry = &info->oti_obj_dentry;
4107
4108         if (!dt_object_exists(dt))
4109                 return -ENOENT;
4110
4111         LASSERT(!dt_object_remote(dt));
4112         LASSERT(inode->i_op != NULL);
4113         LASSERT(inode->i_op->listxattr != NULL);
4114
4115         dentry->d_inode = inode;
4116         dentry->d_sb = inode->i_sb;
4117         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
4118 }
4119
4120 static int osd_declare_xattr_del(const struct lu_env *env,
4121                                  struct dt_object *dt, const char *name,
4122                                  struct thandle *handle)
4123 {
4124         struct osd_thandle *oh;
4125         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
4126
4127         LASSERT(!dt_object_remote(dt));
4128         LASSERT(handle != NULL);
4129
4130         oh = container_of0(handle, struct osd_thandle, ot_super);
4131         LASSERT(oh->ot_handle == NULL);
4132
4133         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
4134                              osd_dto_credits_noquota[DTO_XATTR_SET]);
4135         /*
4136          * xattr del may involve inode quota change, reserve credits for
4137          * dquot_initialize()
4138          */
4139         oh->ot_credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
4140
4141         return 0;
4142 }
4143
4144 /*
4145  * Concurrency: @dt is write locked.
4146  */
4147 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
4148                          const char *name, struct thandle *handle)
4149 {
4150         struct osd_object      *obj    = osd_dt_obj(dt);
4151         struct inode           *inode  = obj->oo_inode;
4152         struct osd_thread_info *info   = osd_oti_get(env);
4153         struct dentry          *dentry = &info->oti_obj_dentry;
4154         int                     rc;
4155
4156         if (!dt_object_exists(dt))
4157                 return -ENOENT;
4158
4159         LASSERT(!dt_object_remote(dt));
4160         LASSERT(inode->i_op != NULL);
4161         LASSERT(inode->i_op->removexattr != NULL);
4162         LASSERT(handle != NULL);
4163
4164         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
4165
4166         ll_vfs_dq_init(inode);
4167         dentry->d_inode = inode;
4168         dentry->d_sb = inode->i_sb;
4169         rc = inode->i_op->removexattr(dentry, name);
4170         if (rc == -ENODATA && strcmp(name, XATTR_NAME_FID) == 0) {
4171                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
4172
4173                 LASSERT(osd_dev(dt->do_lu.lo_dev)->od_is_ost);
4174
4175                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
4176                                  &info->oti_ost_attrs);
4177                 if (!rc) {
4178                         if (!(lma->lma_compat & LMAC_STRIPE_INFO)) {
4179                                 rc = -ENODATA;
4180                                 goto out;
4181                         }
4182
4183                         lma->lma_compat &= ~(LMAC_STRIPE_INFO | LMAC_COMP_INFO);
4184                         lustre_lma_swab(lma);
4185                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4186                                              sizeof(*lma), XATTR_REPLACE);
4187                 }
4188         }
4189
4190 out:
4191         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
4192
4193         if (rc == 0 &&
4194             (strcmp(name, XATTR_NAME_LOV) == 0 ||
4195              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
4196                 osd_oxc_del(obj, name);
4197
4198         return rc;
4199 }
4200
4201 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
4202                            __u64 start, __u64 end)
4203 {
4204         struct osd_object       *obj    = osd_dt_obj(dt);
4205         struct inode            *inode  = obj->oo_inode;
4206         struct osd_thread_info  *info   = osd_oti_get(env);
4207         struct dentry           *dentry = &info->oti_obj_dentry;
4208         struct file             *file   = &info->oti_file;
4209         int                     rc;
4210
4211         ENTRY;
4212
4213         dentry->d_inode = inode;
4214         dentry->d_sb = inode->i_sb;
4215         file->f_path.dentry = dentry;
4216         file->f_mapping = inode->i_mapping;
4217         file->f_op = inode->i_fop;
4218         set_file_inode(file, inode);
4219
4220         rc = ll_vfs_fsync_range(file, start, end, 0);
4221
4222         RETURN(rc);
4223 }
4224
4225 static int osd_invalidate(const struct lu_env *env, struct dt_object *dt)
4226 {
4227         return 0;
4228 }
4229
4230 /*
4231  * Index operations.
4232  */
4233
4234 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
4235                            const struct dt_index_features *feat)
4236 {
4237         struct iam_descr *descr;
4238
4239         if (osd_object_is_root(o))
4240                 return feat == &dt_directory_features;
4241
4242         LASSERT(o->oo_dir != NULL);
4243
4244         descr = o->oo_dir->od_container.ic_descr;
4245         if (feat == &dt_directory_features) {
4246                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
4247                         return 1;
4248                 else
4249                         return 0;
4250         } else {
4251                 return
4252                         feat->dif_keysize_min <= descr->id_key_size &&
4253                         descr->id_key_size <= feat->dif_keysize_max &&
4254                         feat->dif_recsize_min <= descr->id_rec_size &&
4255                         descr->id_rec_size <= feat->dif_recsize_max &&
4256                         !(feat->dif_flags & (DT_IND_VARKEY |
4257                                              DT_IND_VARREC | DT_IND_NONUNQ)) &&
4258                         ergo(feat->dif_flags & DT_IND_UPDATE,
4259                              1 /* XXX check that object (and file system) is
4260                                 * writable */);
4261         }
4262 }
4263
4264 static int osd_iam_container_init(const struct lu_env *env,
4265                                   struct osd_object *obj,
4266                                   struct osd_directory *dir)
4267 {
4268         struct iam_container *bag = &dir->od_container;
4269         int result;
4270
4271         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
4272         if (result != 0)
4273                 return result;
4274
4275         result = iam_container_setup(bag);
4276         if (result == 0)
4277                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
4278         else
4279                 iam_container_fini(bag);
4280
4281         return result;
4282 }
4283
4284
4285 /*
4286  * Concurrency: no external locking is necessary.
4287  */
4288 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
4289                          const struct dt_index_features *feat)
4290 {
4291         int                      result;
4292         int                      skip_iam = 0;
4293         struct osd_object       *obj = osd_dt_obj(dt);
4294
4295         LINVRNT(osd_invariant(obj));
4296
4297         if (osd_object_is_root(obj)) {
4298                 dt->do_index_ops = &osd_index_ea_ops;
4299                 result = 0;
4300         } else if (feat == &dt_directory_features) {
4301                 dt->do_index_ops = &osd_index_ea_ops;
4302                 if (obj->oo_inode == NULL || S_ISDIR(obj->oo_inode->i_mode))
4303                         result = 0;
4304                 else
4305                         result = -ENOTDIR;
4306                 skip_iam = 1;
4307         } else if (unlikely(feat == &dt_otable_features)) {
4308                 dt->do_index_ops = &osd_otable_ops;
4309                 return 0;
4310         } else if (unlikely(feat == &dt_acct_features)) {
4311                 dt->do_index_ops = &osd_acct_index_ops;
4312                 result = 0;
4313                 skip_iam = 1;
4314         } else if (!osd_has_index(obj)) {
4315                 struct osd_directory *dir;
4316
4317                 OBD_ALLOC_PTR(dir);
4318                 if (dir != NULL) {
4319
4320                         spin_lock(&obj->oo_guard);
4321                         if (obj->oo_dir == NULL)
4322                                 obj->oo_dir = dir;
4323                         else
4324                                 /*
4325                                  * Concurrent thread allocated container data.
4326                                  */
4327                                 OBD_FREE_PTR(dir);
4328                         spin_unlock(&obj->oo_guard);
4329                         /*
4330                          * Now, that we have container data, serialize its
4331                          * initialization.
4332                          */
4333                         down_write(&obj->oo_ext_idx_sem);
4334                         /*
4335                          * recheck under lock.
4336                          */
4337                         if (!osd_has_index(obj))
4338                                 result = osd_iam_container_init(env, obj,
4339                                                                 obj->oo_dir);
4340                         else
4341                                 result = 0;
4342                         up_write(&obj->oo_ext_idx_sem);
4343                 } else {
4344                         result = -ENOMEM;
4345                 }
4346         } else {
4347                 result = 0;
4348         }
4349
4350         if (result == 0 && skip_iam == 0) {
4351                 if (!osd_iam_index_probe(env, obj, feat))
4352                         result = -ENOTDIR;
4353         }
4354         LINVRNT(osd_invariant(obj));
4355
4356         return result;
4357 }
4358
4359 static int osd_otable_it_attr_get(const struct lu_env *env,
4360                                  struct dt_object *dt,
4361                                  struct lu_attr *attr)
4362 {
4363         attr->la_valid = 0;
4364         return 0;
4365 }
4366
4367 static const struct dt_object_operations osd_obj_ops = {
4368         .do_read_lock           = osd_read_lock,
4369         .do_write_lock          = osd_write_lock,
4370         .do_read_unlock         = osd_read_unlock,
4371         .do_write_unlock        = osd_write_unlock,
4372         .do_write_locked        = osd_write_locked,
4373         .do_attr_get            = osd_attr_get,
4374         .do_declare_attr_set    = osd_declare_attr_set,
4375         .do_attr_set            = osd_attr_set,
4376         .do_ah_init             = osd_ah_init,
4377         .do_declare_create      = osd_declare_create,
4378         .do_create              = osd_create,
4379         .do_declare_destroy     = osd_declare_destroy,
4380         .do_destroy             = osd_destroy,
4381         .do_index_try           = osd_index_try,
4382         .do_declare_ref_add     = osd_declare_ref_add,
4383         .do_ref_add             = osd_ref_add,
4384         .do_declare_ref_del     = osd_declare_ref_del,
4385         .do_ref_del             = osd_ref_del,
4386         .do_xattr_get           = osd_xattr_get,
4387         .do_declare_xattr_set   = osd_declare_xattr_set,
4388         .do_xattr_set           = osd_xattr_set,
4389         .do_declare_xattr_del   = osd_declare_xattr_del,
4390         .do_xattr_del           = osd_xattr_del,
4391         .do_xattr_list          = osd_xattr_list,
4392         .do_object_sync         = osd_object_sync,
4393         .do_invalidate          = osd_invalidate,
4394 };
4395
4396 static const struct dt_object_operations osd_obj_otable_it_ops = {
4397         .do_attr_get    = osd_otable_it_attr_get,
4398         .do_index_try   = osd_index_try,
4399 };
4400
4401 static int osd_index_declare_iam_delete(const struct lu_env *env,
4402                                         struct dt_object *dt,
4403                                         const struct dt_key *key,
4404                                         struct thandle *handle)
4405 {
4406         struct osd_thandle    *oh;
4407
4408         oh = container_of0(handle, struct osd_thandle, ot_super);
4409         LASSERT(oh->ot_handle == NULL);
4410
4411         /* Recycle  may cause additional three blocks to be changed. */
4412         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
4413                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
4414
4415         return 0;
4416 }
4417
4418 /**
4419  *      delete a (key, value) pair from index \a dt specified by \a key
4420  *
4421  *      \param  dt      osd index object
4422  *      \param  key     key for index
4423  *      \param  rec     record reference
4424  *      \param  handle  transaction handler
4425  *
4426  *      \retval  0  success
4427  *      \retval -ve   failure
4428  */
4429 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
4430                                 const struct dt_key *key,
4431                                 struct thandle *handle)
4432 {
4433         struct osd_thread_info *oti = osd_oti_get(env);
4434         struct osd_object      *obj = osd_dt_obj(dt);
4435         struct osd_thandle     *oh;
4436         struct iam_path_descr  *ipd;
4437         struct iam_container   *bag = &obj->oo_dir->od_container;
4438         int                     rc;
4439         ENTRY;
4440
4441         if (!dt_object_exists(dt))
4442                 RETURN(-ENOENT);
4443
4444         LINVRNT(osd_invariant(obj));
4445         LASSERT(!dt_object_remote(dt));
4446         LASSERT(bag->ic_object == obj->oo_inode);
4447         LASSERT(handle != NULL);
4448
4449         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
4450
4451         ipd = osd_idx_ipd_get(env, bag);
4452         if (unlikely(ipd == NULL))
4453                 RETURN(-ENOMEM);
4454
4455         oh = container_of0(handle, struct osd_thandle, ot_super);
4456         LASSERT(oh->ot_handle != NULL);
4457         LASSERT(oh->ot_handle->h_transaction != NULL);
4458
4459         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
4460                 /* swab quota uid/gid provided by caller */
4461                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4462                 key = (const struct dt_key *)&oti->oti_quota_id;
4463         }
4464
4465         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
4466         osd_ipd_put(env, bag, ipd);
4467         LINVRNT(osd_invariant(obj));
4468         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
4469         RETURN(rc);
4470 }
4471
4472 static int osd_index_declare_ea_delete(const struct lu_env *env,
4473                                        struct dt_object *dt,
4474                                        const struct dt_key *key,
4475                                        struct thandle *handle)
4476 {
4477         struct osd_thandle *oh;
4478         struct inode       *inode;
4479         int                 rc, credits;
4480         ENTRY;
4481
4482         LASSERT(!dt_object_remote(dt));
4483         LASSERT(handle != NULL);
4484
4485         oh = container_of0(handle, struct osd_thandle, ot_super);
4486         LASSERT(oh->ot_handle == NULL);
4487
4488         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE];
4489         if (key != NULL && unlikely(strcmp((char *)key, dotdot) == 0)) {
4490                 /* '..' to a remote object has a local representative */
4491                 credits += osd_dto_credits_noquota[DTO_INDEX_DELETE];
4492                 /* to reset LMAI_REMOTE_PARENT */
4493                 credits += 1;
4494         }
4495         osd_trans_declare_op(env, oh, OSD_OT_DELETE, credits);
4496
4497         inode = osd_dt_obj(dt)->oo_inode;
4498         if (inode == NULL)
4499                 RETURN(-ENOENT);
4500
4501         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
4502                                    i_projid_read(inode), 0, oh, osd_dt_obj(dt),
4503                                    NULL, OSD_QID_BLK);
4504         RETURN(rc);
4505 }
4506
4507 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
4508                                           struct dt_rec *fid)
4509 {
4510         struct osd_fid_pack *rec;
4511         int                  rc = -ENODATA;
4512
4513         if (de->file_type & LDISKFS_DIRENT_LUFID) {
4514                 rec = (struct osd_fid_pack *) (de->name + de->name_len + 1);
4515                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
4516                 if (rc == 0 && unlikely(!fid_is_sane((struct lu_fid *)fid)))
4517                         rc = -EINVAL;
4518         }
4519         return rc;
4520 }
4521
4522 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
4523                           const struct lu_fid *fid)
4524 {
4525         struct seq_server_site  *ss = osd_seq_site(osd);
4526         ENTRY;
4527
4528         /* FID seqs not in FLDB, must be local seq */
4529         if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
4530                 RETURN(0);
4531
4532         /* If FLD is not being initialized yet, it only happens during the
4533          * initialization, likely during mgs initialization, and we assume
4534          * this is local FID. */
4535         if (ss == NULL || ss->ss_server_fld == NULL)
4536                 RETURN(0);
4537
4538         /* Only check the local FLDB here */
4539         if (osd_seq_exists(env, osd, fid_seq(fid)))
4540                 RETURN(0);
4541
4542         RETURN(1);
4543 }
4544
4545 static void osd_take_care_of_agent(const struct lu_env *env,
4546                                    struct osd_device *osd,
4547                                    struct osd_thandle *oh,
4548                                    struct ldiskfs_dir_entry_2 *de)
4549 {
4550         struct lu_fid *fid = &osd_oti_get(env)->oti_fid;
4551         struct osd_idmap_cache *idc;
4552         int rc, schedule = 0;
4553
4554         LASSERT(de != NULL);
4555
4556         rc = osd_get_fid_from_dentry(de, (struct dt_rec *)fid);
4557         if (likely(rc == 0)) {
4558                 idc = osd_idc_find_or_init(env, osd, fid);
4559                 if (IS_ERR(idc) || idc->oic_remote)
4560                         schedule = 1;
4561         } else if (rc == -ENODATA) {
4562                 /* can't get FID, postpone to the end of the
4563                  * transaction when iget() is safe */
4564                 schedule = 1;
4565         } else {
4566                 CERROR("%s: can't get FID: rc = %d\n", osd_name(osd), rc);
4567         }
4568         if (schedule)
4569                 osd_schedule_agent_inode_removal(env, oh,
4570                                                  le32_to_cpu(de->inode));
4571 }
4572
4573 /**
4574  * Index delete function for interoperability mode (b11826).
4575  * It will remove the directory entry added by osd_index_ea_insert().
4576  * This entry is needed to maintain name->fid mapping.
4577  *
4578  * \param key,  key i.e. file entry to be deleted
4579  *
4580  * \retval   0, on success
4581  * \retval -ve, on error
4582  */
4583 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
4584                                const struct dt_key *key, struct thandle *handle)
4585 {
4586         struct osd_object          *obj = osd_dt_obj(dt);
4587         struct inode               *dir = obj->oo_inode;
4588         struct dentry              *dentry;
4589         struct osd_thandle         *oh;
4590         struct ldiskfs_dir_entry_2 *de = NULL;
4591         struct buffer_head         *bh;
4592         struct htree_lock          *hlock = NULL;
4593         struct lu_fid              *fid = &osd_oti_get(env)->oti_fid;
4594         struct osd_device          *osd = osd_dev(dt->do_lu.lo_dev);
4595         int                        rc;
4596         ENTRY;
4597
4598         if (!dt_object_exists(dt))
4599                 RETURN(-ENOENT);
4600
4601         LINVRNT(osd_invariant(obj));
4602         LASSERT(!dt_object_remote(dt));
4603         LASSERT(handle != NULL);
4604
4605         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
4606
4607         oh = container_of(handle, struct osd_thandle, ot_super);
4608         LASSERT(oh->ot_handle != NULL);
4609         LASSERT(oh->ot_handle->h_transaction != NULL);
4610
4611         ll_vfs_dq_init(dir);
4612         dentry = osd_child_dentry_get(env, obj,
4613                                       (char *)key, strlen((char *)key));
4614
4615         if (obj->oo_hl_head != NULL) {
4616                 hlock = osd_oti_get(env)->oti_hlock;
4617                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
4618                                    dir, LDISKFS_HLOCK_DEL);
4619         } else {
4620                 down_write(&obj->oo_ext_idx_sem);
4621         }
4622
4623         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
4624         if (!IS_ERR(bh)) {
4625                 /* If this is not the ".." entry, it might be a remote DNE
4626                  * entry and  we need to check if the FID is for a remote
4627                  * MDT.  If the FID is  not in the directory entry (e.g.
4628                  * upgraded 1.8 filesystem without dirdata enabled) then
4629                  * we need to get the FID from the LMA. For a remote directory
4630                  * there HAS to be an LMA, it cannot be an IGIF inode in this
4631                  * case.
4632                  *
4633                  * Delete the entry before the agent inode in order to
4634                  * simplify error handling.  At worst an error after deleting
4635                  * the entry first might leak the agent inode afterward. The
4636                  * reverse would need filesystem abort in case of error deleting
4637                  * the entry after the agent had been removed, or leave a
4638                  * dangling entry pointing at a random inode. */
4639                 if (strcmp((char *)key, dotdot) != 0)
4640                         osd_take_care_of_agent(env, osd, oh, de);
4641                 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
4642                 brelse(bh);
4643         } else {
4644                 rc = PTR_ERR(bh);
4645         }
4646         if (hlock != NULL)
4647                 ldiskfs_htree_unlock(hlock);
4648         else
4649                 up_write(&obj->oo_ext_idx_sem);
4650
4651         if (rc != 0)
4652                 GOTO(out, rc);
4653
4654         /* For inode on the remote MDT, .. will point to
4655          * /Agent directory, Check whether it needs to delete
4656          * from agent directory */
4657         if (unlikely(strcmp((char *)key, dotdot) == 0)) {
4658                 int ret;
4659
4660                 ret = osd_delete_from_remote_parent(env, osd_obj2dev(obj),
4661                                                     obj, oh);
4662                 if (ret != 0)
4663                         /* Sigh, the entry has been deleted, and
4664                          * it is not easy to revert it back, so
4665                          * let's keep this error private, and let
4666                          * LFSCK fix it. XXX */
4667                         CERROR("%s: delete remote parent "DFID": rc = %d\n",
4668                                osd_name(osd), PFID(fid), ret);
4669         }
4670 out:
4671         LASSERT(osd_invariant(obj));
4672         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
4673         RETURN(rc);
4674 }
4675
4676 /**
4677  *      Lookup index for \a key and copy record to \a rec.
4678  *
4679  *      \param  dt      osd index object
4680  *      \param  key     key for index
4681  *      \param  rec     record reference
4682  *
4683  *      \retval  +ve  success : exact mach
4684  *      \retval  0    return record with key not greater than \a key
4685  *      \retval -ve   failure
4686  */
4687 static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
4688                                 struct dt_rec *rec, const struct dt_key *key)
4689 {
4690         struct osd_object      *obj = osd_dt_obj(dt);
4691         struct iam_path_descr  *ipd;
4692         struct iam_container   *bag = &obj->oo_dir->od_container;
4693         struct osd_thread_info *oti = osd_oti_get(env);
4694         struct iam_iterator    *it = &oti->oti_idx_it;
4695         struct iam_rec         *iam_rec;
4696         int                     rc;
4697         ENTRY;
4698
4699         if (!dt_object_exists(dt))
4700                 RETURN(-ENOENT);
4701
4702         LASSERT(osd_invariant(obj));
4703         LASSERT(!dt_object_remote(dt));
4704         LASSERT(bag->ic_object == obj->oo_inode);
4705
4706         ipd = osd_idx_ipd_get(env, bag);
4707         if (IS_ERR(ipd))
4708                 RETURN(-ENOMEM);
4709
4710         /* got ipd now we can start iterator. */
4711         iam_it_init(it, bag, 0, ipd);
4712
4713         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
4714                 /* swab quota uid/gid provided by caller */
4715                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4716                 key = (const struct dt_key *)&oti->oti_quota_id;
4717         }
4718
4719         rc = iam_it_get(it, (struct iam_key *)key);
4720         if (rc >= 0) {
4721                 if (S_ISDIR(obj->oo_inode->i_mode))
4722                         iam_rec = (struct iam_rec *)oti->oti_ldp;
4723                 else
4724                         iam_rec = (struct iam_rec *) rec;
4725
4726                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
4727
4728                 if (S_ISDIR(obj->oo_inode->i_mode))
4729                         osd_fid_unpack((struct lu_fid *) rec,
4730                                        (struct osd_fid_pack *)iam_rec);
4731                 else if (fid_is_quota(lu_object_fid(&dt->do_lu)))
4732                         osd_quota_unpack(obj, rec);
4733         }
4734
4735         iam_it_put(it);
4736         iam_it_fini(it);
4737         osd_ipd_put(env, bag, ipd);
4738
4739         LINVRNT(osd_invariant(obj));
4740
4741         RETURN(rc);
4742 }
4743
4744 static int osd_index_declare_iam_insert(const struct lu_env *env,
4745                                         struct dt_object *dt,
4746                                         const struct dt_rec *rec,
4747                                         const struct dt_key *key,
4748                                         struct thandle *handle)
4749 {
4750         struct osd_thandle *oh;
4751
4752         LASSERT(handle != NULL);
4753
4754         oh = container_of0(handle, struct osd_thandle, ot_super);
4755         LASSERT(oh->ot_handle == NULL);
4756
4757         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
4758                              osd_dto_credits_noquota[DTO_INDEX_INSERT]);
4759
4760         return 0;
4761 }
4762
4763 /**
4764  *      Inserts (key, value) pair in \a dt index object.
4765  *
4766  *      \param  dt      osd index object
4767  *      \param  key     key for index
4768  *      \param  rec     record reference
4769  *      \param  th      transaction handler
4770  *
4771  *      \retval  0  success
4772  *      \retval -ve failure
4773  */
4774 static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
4775                                 const struct dt_rec *rec,
4776                                 const struct dt_key *key, struct thandle *th,
4777                                 int ignore_quota)
4778 {
4779         struct osd_object     *obj = osd_dt_obj(dt);
4780         struct iam_path_descr *ipd;
4781         struct osd_thandle    *oh;
4782         struct iam_container  *bag;
4783         struct osd_thread_info *oti = osd_oti_get(env);
4784         struct iam_rec         *iam_rec;
4785         int                     rc;
4786         ENTRY;
4787
4788         if (!dt_object_exists(dt))
4789                 RETURN(-ENOENT);
4790
4791         LINVRNT(osd_invariant(obj));
4792         LASSERT(!dt_object_remote(dt));
4793
4794         bag = &obj->oo_dir->od_container;
4795         LASSERT(bag->ic_object == obj->oo_inode);
4796         LASSERT(th != NULL);
4797
4798         osd_trans_exec_op(env, th, OSD_OT_INSERT);
4799
4800         ipd = osd_idx_ipd_get(env, bag);
4801         if (unlikely(ipd == NULL))
4802                 RETURN(-ENOMEM);
4803
4804         oh = container_of0(th, struct osd_thandle, ot_super);
4805         LASSERT(oh->ot_handle != NULL);
4806         LASSERT(oh->ot_handle->h_transaction != NULL);
4807         if (S_ISDIR(obj->oo_inode->i_mode)) {
4808                 iam_rec = (struct iam_rec *)oti->oti_ldp;
4809                 osd_fid_pack((struct osd_fid_pack *)iam_rec, rec, &oti->oti_fid);
4810         } else if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
4811                 /* pack quota uid/gid */
4812                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4813                 key = (const struct dt_key *)&oti->oti_quota_id;
4814                 /* pack quota record */
4815                 rec = osd_quota_pack(obj, rec, &oti->oti_quota_rec);
4816                 iam_rec = (struct iam_rec *)rec;
4817         } else {
4818                 iam_rec = (struct iam_rec *)rec;
4819         }
4820
4821         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
4822                         iam_rec, ipd);
4823         osd_ipd_put(env, bag, ipd);
4824         LINVRNT(osd_invariant(obj));
4825         osd_trans_exec_check(env, th, OSD_OT_INSERT);
4826         RETURN(rc);
4827 }
4828
4829 /**
4830  * Calls ldiskfs_add_entry() to add directory entry
4831  * into the directory. This is required for
4832  * interoperability mode (b11826)
4833  *
4834  * \retval   0, on success
4835  * \retval -ve, on error
4836  */
4837 static int __osd_ea_add_rec(struct osd_thread_info *info,
4838                             struct osd_object *pobj, struct inode  *cinode,
4839                             const char *name, const struct lu_fid *fid,
4840                             struct htree_lock *hlock, struct thandle *th)
4841 {
4842         struct ldiskfs_dentry_param *ldp;
4843         struct dentry               *child;
4844         struct osd_thandle          *oth;
4845         int                          rc;
4846
4847         oth = container_of(th, struct osd_thandle, ot_super);
4848         LASSERT(oth->ot_handle != NULL);
4849         LASSERT(oth->ot_handle->h_transaction != NULL);
4850         LASSERT(pobj->oo_inode);
4851
4852         ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
4853         if (unlikely(pobj->oo_inode ==
4854                      osd_sb(osd_obj2dev(pobj))->s_root->d_inode))
4855                 ldp->edp_magic = 0;
4856         else
4857                 osd_get_ldiskfs_dirent_param(ldp, fid);
4858         child = osd_child_dentry_get(info->oti_env, pobj, name, strlen(name));
4859         child->d_fsdata = (void *)ldp;
4860         ll_vfs_dq_init(pobj->oo_inode);
4861         rc = osd_ldiskfs_add_entry(info, osd_obj2dev(pobj), oth->ot_handle,
4862                                    child, cinode, hlock);
4863         if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_TYPE)) {
4864                 struct ldiskfs_dir_entry_2      *de;
4865                 struct buffer_head              *bh;
4866                 int                              rc1;
4867
4868                 bh = osd_ldiskfs_find_entry(pobj->oo_inode, &child->d_name, &de,
4869                                             NULL, hlock);
4870                 if (!IS_ERR(bh)) {
4871                         rc1 = ldiskfs_journal_get_write_access(oth->ot_handle,
4872                                                                bh);
4873                         if (rc1 == 0) {
4874                                 if (S_ISDIR(cinode->i_mode))
4875                                         de->file_type = LDISKFS_DIRENT_LUFID |
4876                                                         LDISKFS_FT_REG_FILE;
4877                                 else
4878                                         de->file_type = LDISKFS_DIRENT_LUFID |
4879                                                         LDISKFS_FT_DIR;
4880                                 ldiskfs_handle_dirty_metadata(oth->ot_handle,
4881                                                               NULL, bh);
4882                         }
4883                         brelse(bh);
4884                 }
4885         }
4886
4887         RETURN(rc);
4888 }
4889
4890 /**
4891  * Calls ldiskfs_add_dot_dotdot() to add dot and dotdot entries
4892  * into the directory.Also sets flags into osd object to
4893  * indicate dot and dotdot are created. This is required for
4894  * interoperability mode (b11826)
4895  *
4896  * \param dir   directory for dot and dotdot fixup.
4897  * \param obj   child object for linking
4898  *
4899  * \retval   0, on success
4900  * \retval -ve, on error
4901  */
4902 static int osd_add_dot_dotdot(struct osd_thread_info *info,
4903                               struct osd_object *dir,
4904                               struct inode *parent_dir, const char *name,
4905                               const struct lu_fid *dot_fid,
4906                               const struct lu_fid *dot_dot_fid,
4907                               struct thandle *th)
4908 {
4909         struct inode                *inode = dir->oo_inode;
4910         struct osd_thandle          *oth;
4911         int result = 0;
4912
4913         oth = container_of(th, struct osd_thandle, ot_super);
4914         LASSERT(oth->ot_handle->h_transaction != NULL);
4915         LASSERT(S_ISDIR(dir->oo_inode->i_mode));
4916
4917         if (strcmp(name, dot) == 0) {
4918                 if (dir->oo_compat_dot_created) {
4919                         result = -EEXIST;
4920                 } else {
4921                         LASSERT(inode->i_ino == parent_dir->i_ino);
4922                         dir->oo_compat_dot_created = 1;
4923                         result = 0;
4924                 }
4925         } else if (strcmp(name, dotdot) == 0) {
4926                 if (!dir->oo_compat_dot_created)
4927                         return -EINVAL;
4928                 /* in case of rename, dotdot is already created */
4929                 if (dir->oo_compat_dotdot_created) {
4930                         return __osd_ea_add_rec(info, dir, parent_dir, name,
4931                                                 dot_dot_fid, NULL, th);
4932                 }
4933
4934                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PARENT)) {
4935                         struct lu_fid tfid = *dot_dot_fid;
4936
4937                         tfid.f_oid--;
4938                         result = osd_add_dot_dotdot_internal(info,
4939                                         dir->oo_inode, parent_dir, dot_fid,
4940                                         &tfid, oth);
4941                 } else {
4942                         result = osd_add_dot_dotdot_internal(info,
4943                                         dir->oo_inode, parent_dir, dot_fid,
4944                                         dot_dot_fid, oth);
4945                 }
4946
4947                 if (result == 0)
4948                         dir->oo_compat_dotdot_created = 1;
4949         }
4950
4951         return result;
4952 }
4953
4954
4955 /**
4956  * It will call the appropriate osd_add* function and return the
4957  * value, return by respective functions.
4958  */
4959 static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
4960                           struct inode *cinode, const char *name,
4961                           const struct lu_fid *fid, struct thandle *th)
4962 {
4963         struct osd_thread_info *info   = osd_oti_get(env);
4964         struct htree_lock      *hlock;
4965         int                     rc;
4966
4967         hlock = pobj->oo_hl_head != NULL ? info->oti_hlock : NULL;
4968
4969         if (name[0] == '.' && (name[1] == '\0' || (name[1] == '.' &&
4970                                                    name[2] =='\0'))) {
4971                 if (hlock != NULL) {
4972                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
4973                                            pobj->oo_inode, 0);
4974                 } else {
4975                         down_write(&pobj->oo_ext_idx_sem);
4976                 }
4977
4978                 rc = osd_add_dot_dotdot(info, pobj, cinode, name,
4979                                         lu_object_fid(&pobj->oo_dt.do_lu),
4980                                         fid, th);
4981         } else {
4982                 if (hlock != NULL) {
4983                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
4984                                            pobj->oo_inode, LDISKFS_HLOCK_ADD);
4985                 } else {
4986                         down_write(&pobj->oo_ext_idx_sem);
4987                 }
4988
4989                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_INDIR)) {
4990                         struct lu_fid *tfid = &info->oti_fid;
4991
4992                         *tfid = *fid;
4993                         tfid->f_ver = ~0;
4994                         rc = __osd_ea_add_rec(info, pobj, cinode, name,
4995                                               tfid, hlock, th);
4996                 } else {
4997                         rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
4998                                               hlock, th);
4999                 }
5000         }
5001         if (hlock != NULL)
5002                 ldiskfs_htree_unlock(hlock);
5003         else
5004                 up_write(&pobj->oo_ext_idx_sem);
5005
5006         return rc;
5007 }
5008
5009 static int
5010 osd_consistency_check(struct osd_thread_info *oti, struct osd_device *dev,
5011                       struct osd_idmap_cache *oic)
5012 {
5013         struct osd_scrub *scrub = &dev->od_scrub;
5014         struct lu_fid *fid = &oic->oic_fid;
5015         struct osd_inode_id *id = &oic->oic_lid;
5016         struct inode *inode = NULL;
5017         int once  = 0;
5018         bool insert;
5019         int rc;
5020         ENTRY;
5021
5022         if (!fid_is_norm(fid) && !fid_is_igif(fid))
5023                 RETURN(0);
5024
5025         if (scrub->os_pos_current > id->oii_ino)
5026                 RETURN(0);
5027
5028 again:
5029         rc = osd_oi_lookup(oti, dev, fid, &oti->oti_id, 0);
5030         if (rc == -ENOENT) {
5031                 __u32 gen = id->oii_gen;
5032
5033                 insert = true;
5034                 if (inode != NULL)
5035                         goto trigger;
5036
5037                 inode = osd_iget(oti, dev, id);
5038                 /* The inode has been removed (by race maybe). */
5039                 if (IS_ERR(inode)) {
5040                         rc = PTR_ERR(inode);
5041
5042                         RETURN(rc == -ESTALE ? -ENOENT : rc);
5043                 }
5044
5045                 /* The OI mapping is lost. */
5046                 if (gen != OSD_OII_NOGEN)
5047                         goto trigger;
5048
5049                 /* The inode may has been reused by others, we do not know,
5050                  * leave it to be handled by subsequent osd_fid_lookup(). */
5051                 GOTO(out, rc = 0);
5052         } else if (rc || osd_id_eq(id, &oti->oti_id)) {
5053                 GOTO(out, rc);
5054         }
5055
5056         insert = false;
5057
5058 trigger:
5059         if (thread_is_running(&scrub->os_thread)) {
5060                 if (inode == NULL) {
5061                         inode = osd_iget(oti, dev, id);
5062                         /* The inode has been removed (by race maybe). */
5063                         if (IS_ERR(inode)) {
5064                                 rc = PTR_ERR(inode);
5065
5066                                 RETURN(rc == -ESTALE ? -ENOENT : rc);
5067                         }
5068                 }
5069
5070                 rc = osd_oii_insert(dev, oic, insert);
5071                 /* There is race condition between osd_oi_lookup and OI scrub.
5072                  * The OI scrub finished just after osd_oi_lookup() failure.
5073                  * Under such case, it is unnecessary to trigger OI scrub again,
5074                  * but try to call osd_oi_lookup() again. */
5075                 if (unlikely(rc == -EAGAIN))
5076                         goto again;
5077
5078                 if (!S_ISDIR(inode->i_mode))
5079                         rc = 0;
5080                 else
5081                         rc = osd_check_lmv(oti, dev, inode, oic);
5082
5083                 GOTO(out, rc);
5084         }
5085
5086         if (!dev->od_noscrub && ++once == 1) {
5087                 rc = osd_scrub_start(dev, SS_AUTO_PARTIAL | SS_CLEAR_DRYRUN |
5088                                      SS_CLEAR_FAILOUT);
5089                 CDEBUG(D_LFSCK | D_CONSOLE | D_WARNING,
5090                        "%s: trigger partial OI scrub for RPC inconsistency "
5091                        "checking FID "DFID": rc = %d\n",
5092                        osd_dev2name(dev), PFID(fid), rc);
5093                 if (rc == 0 || rc == -EALREADY)
5094                         goto again;
5095         }
5096
5097         GOTO(out, rc);
5098
5099 out:
5100         if (inode)
5101                 iput(inode);
5102
5103         RETURN(rc);
5104 }
5105
5106 static int osd_fail_fid_lookup(struct osd_thread_info *oti,
5107                                struct osd_device *dev,
5108                                struct osd_idmap_cache *oic,
5109                                struct lu_fid *fid, __u32 ino)
5110 {
5111         struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
5112         struct inode *inode;
5113         int rc;
5114
5115         osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
5116         inode = osd_iget(oti, dev, &oic->oic_lid);
5117         if (IS_ERR(inode)) {
5118                 fid_zero(&oic->oic_fid);
5119                 return PTR_ERR(inode);
5120         }
5121
5122         rc = osd_get_lma(oti, inode, &oti->oti_obj_dentry, loa);
5123         iput(inode);
5124         if (rc != 0)
5125                 fid_zero(&oic->oic_fid);
5126         else
5127                 *fid = oic->oic_fid = loa->loa_lma.lma_self_fid;
5128         return rc;
5129 }
5130
5131 void osd_add_oi_cache(struct osd_thread_info *info, struct osd_device *osd,
5132                       struct osd_inode_id *id, const struct lu_fid *fid)
5133 {
5134         CDEBUG(D_INODE, "add "DFID" %u:%u to info %p\n", PFID(fid),
5135                id->oii_ino, id->oii_gen, info);
5136         info->oti_cache.oic_lid = *id;
5137         info->oti_cache.oic_fid = *fid;
5138         info->oti_cache.oic_dev = osd;
5139 }
5140
5141 /**
5142  * Get parent FID from the linkEA.
5143  *
5144  * For a directory which parent resides on remote MDT, to satisfy the
5145  * local e2fsck, we insert it into the /REMOTE_PARENT_DIR locally. On
5146  * the other hand, to make the lookup(..) on the directory can return
5147  * the real parent FID, we append the real parent FID after its ".."
5148  * name entry in the /REMOTE_PARENT_DIR.
5149  *
5150  * Unfortunately, such PFID-in-dirent cannot be preserved via file-level
5151  * backup. So after the restore, we cannot get the right parent FID from
5152  * its ".." name entry in the /REMOTE_PARENT_DIR. Under such case, since
5153  * we have stored the real parent FID in the directory object's linkEA,
5154  * we can parse the linkEA for the real parent FID.
5155  *
5156  * \param[in] env       pointer to the thread context
5157  * \param[in] obj       pointer to the object to be handled
5158  * \param[out]fid       pointer to the buffer to hold the parent FID
5159  *
5160  * \retval              0 for getting the real parent FID successfully
5161  * \retval              negative error number on failure
5162  */
5163 static int osd_get_pfid_from_linkea(const struct lu_env *env,
5164                                     struct osd_object *obj,
5165                                     struct lu_fid *fid)
5166 {
5167         struct osd_thread_info  *oti    = osd_oti_get(env);
5168         struct lu_buf           *buf    = &oti->oti_big_buf;
5169         struct dentry           *dentry = &oti->oti_obj_dentry;
5170         struct inode            *inode  = obj->oo_inode;
5171         struct linkea_data       ldata  = { NULL };
5172         int                      rc;
5173         ENTRY;
5174
5175         fid_zero(fid);
5176         if (!S_ISDIR(inode->i_mode))
5177                 RETURN(-EIO);
5178
5179 again:
5180         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5181                              buf->lb_buf, buf->lb_len);
5182         if (rc == -ERANGE) {
5183                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5184                                      NULL, 0);
5185                 if (rc > 0) {
5186                         lu_buf_realloc(buf, rc);
5187                         if (buf->lb_buf == NULL)
5188                                 RETURN(-ENOMEM);
5189
5190                         goto again;
5191                 }
5192         }
5193
5194         if (unlikely(rc == 0))
5195                 RETURN(-ENODATA);
5196
5197         if (rc < 0)
5198                 RETURN(rc);
5199
5200         if (unlikely(buf->lb_buf == NULL)) {
5201                 lu_buf_realloc(buf, rc);
5202                 if (buf->lb_buf == NULL)
5203                         RETURN(-ENOMEM);
5204
5205                 goto again;
5206         }
5207
5208         ldata.ld_buf = buf;
5209         rc = linkea_init_with_rec(&ldata);
5210         if (!rc) {
5211                 linkea_first_entry(&ldata);
5212                 linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, NULL, fid);
5213         }
5214
5215         RETURN(rc);
5216 }
5217
5218 static int osd_verify_ent_by_linkea(const struct lu_env *env,
5219                                     struct inode *inode,
5220                                     const struct lu_fid *pfid,
5221                                     const char *name, const int namelen)
5222 {
5223         struct osd_thread_info *oti = osd_oti_get(env);
5224         struct lu_buf *buf = &oti->oti_big_buf;
5225         struct dentry *dentry = &oti->oti_obj_dentry;
5226         struct linkea_data ldata = { NULL };
5227         struct lu_name cname = { .ln_name = name,
5228                                  .ln_namelen = namelen };
5229         int rc;
5230         ENTRY;
5231
5232 again:
5233         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5234                              buf->lb_buf, buf->lb_len);
5235         if (rc == -ERANGE)
5236                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK, NULL, 0);
5237
5238         if (rc < 0)
5239                 RETURN(rc);
5240
5241         if (unlikely(rc == 0))
5242                 RETURN(-ENODATA);
5243
5244         if (buf->lb_len < rc) {
5245                 lu_buf_realloc(buf, rc);
5246                 if (buf->lb_buf == NULL)
5247                         RETURN(-ENOMEM);
5248
5249                 goto again;
5250         }
5251
5252         ldata.ld_buf = buf;
5253         rc = linkea_init_with_rec(&ldata);
5254         if (!rc)
5255                 rc = linkea_links_find(&ldata, &cname, pfid);
5256
5257         RETURN(rc);
5258 }
5259
5260 /**
5261  * Calls ->lookup() to find dentry. From dentry get inode and
5262  * read inode's ea to get fid. This is required for  interoperability
5263  * mode (b11826)
5264  *
5265  * \retval   0, on success
5266  * \retval -ve, on error
5267  */
5268 static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
5269                              struct dt_rec *rec, const struct dt_key *key)
5270 {
5271         struct inode                    *dir    = obj->oo_inode;
5272         struct dentry                   *dentry;
5273         struct ldiskfs_dir_entry_2      *de;
5274         struct buffer_head              *bh;
5275         struct lu_fid                   *fid = (struct lu_fid *) rec;
5276         struct htree_lock               *hlock = NULL;
5277         int                             ino;
5278         int                             rc;
5279         ENTRY;
5280
5281         LASSERT(dir->i_op != NULL);
5282         LASSERT(dir->i_op->lookup != NULL);
5283
5284         dentry = osd_child_dentry_get(env, obj,
5285                                       (char *)key, strlen((char *)key));
5286
5287         if (obj->oo_hl_head != NULL) {
5288                 hlock = osd_oti_get(env)->oti_hlock;
5289                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
5290                                    dir, LDISKFS_HLOCK_LOOKUP);
5291         } else {
5292                 down_read(&obj->oo_ext_idx_sem);
5293         }
5294
5295         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
5296         if (!IS_ERR(bh)) {
5297                 struct osd_thread_info *oti = osd_oti_get(env);
5298                 struct osd_inode_id *id = &oti->oti_id;
5299                 struct osd_idmap_cache *oic = &oti->oti_cache;
5300                 struct osd_device *dev = osd_obj2dev(obj);
5301
5302                 ino = le32_to_cpu(de->inode);
5303                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP)) {
5304                         brelse(bh);
5305                         rc = osd_fail_fid_lookup(oti, dev, oic, fid, ino);
5306                         GOTO(out, rc);
5307                 }
5308
5309                 rc = osd_get_fid_from_dentry(de, rec);
5310
5311                 /* done with de, release bh */
5312                 brelse(bh);
5313                 if (rc != 0) {
5314                         if (unlikely(is_remote_parent_ino(dev, ino))) {
5315                                 const char *name = (const char *)key;
5316
5317                                 /* If the parent is on remote MDT, and there
5318                                  * is no FID-in-dirent, then we have to get
5319                                  * the parent FID from the linkEA.  */
5320                                 if (likely(strlen(name) == 2 &&
5321                                            name[0] == '.' && name[1] == '.'))
5322                                         rc = osd_get_pfid_from_linkea(env, obj,
5323                                                                       fid);
5324                         } else {
5325                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
5326                         }
5327                 } else {
5328                         osd_id_gen(id, ino, OSD_OII_NOGEN);
5329                 }
5330
5331                 if (rc != 0 || osd_remote_fid(env, dev, fid)) {
5332                         fid_zero(&oic->oic_fid);
5333
5334                         GOTO(out, rc);
5335                 }
5336
5337                 osd_add_oi_cache(osd_oti_get(env), osd_obj2dev(obj), id, fid);
5338                 rc = osd_consistency_check(oti, dev, oic);
5339                 if (rc != 0)
5340                         fid_zero(&oic->oic_fid);
5341         } else {
5342                 rc = PTR_ERR(bh);
5343         }
5344
5345         GOTO(out, rc);
5346
5347 out:
5348         if (hlock != NULL)
5349                 ldiskfs_htree_unlock(hlock);
5350         else
5351                 up_read(&obj->oo_ext_idx_sem);
5352         return rc;
5353 }
5354
5355 static int osd_index_declare_ea_insert(const struct lu_env *env,
5356                                        struct dt_object *dt,
5357                                        const struct dt_rec *rec,
5358                                        const struct dt_key *key,
5359                                        struct thandle *handle)
5360 {
5361         struct osd_thandle      *oh;
5362         struct osd_device       *osd   = osd_dev(dt->do_lu.lo_dev);
5363         struct dt_insert_rec    *rec1   = (struct dt_insert_rec *)rec;
5364         const struct lu_fid     *fid    = rec1->rec_fid;
5365         int                      credits, rc = 0;
5366         struct osd_idmap_cache  *idc;
5367         ENTRY;
5368
5369         LASSERT(!dt_object_remote(dt));
5370         LASSERT(handle != NULL);
5371         LASSERT(fid != NULL);
5372         LASSERT(rec1->rec_type != 0);
5373
5374         oh = container_of0(handle, struct osd_thandle, ot_super);
5375         LASSERT(oh->ot_handle == NULL);
5376
5377         credits = osd_dto_credits_noquota[DTO_INDEX_INSERT];
5378
5379         /* we can't call iget() while a transactions is running
5380          * (this can lead to a deadlock), but we need to know
5381          * inum and object type. so we find this information at
5382          * declaration and cache in per-thread info */
5383         idc = osd_idc_find_or_init(env, osd, fid);
5384         if (IS_ERR(idc))
5385                 RETURN(PTR_ERR(idc));
5386         if (idc->oic_remote) {
5387                 /* a reference to remote inode is represented by an
5388                  * agent inode which we have to create */
5389                 credits += osd_dto_credits_noquota[DTO_OBJECT_CREATE];
5390                 credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
5391         }
5392
5393         osd_trans_declare_op(env, oh, OSD_OT_INSERT, credits);
5394
5395         if (osd_dt_obj(dt)->oo_inode != NULL) {
5396                 struct inode *inode = osd_dt_obj(dt)->oo_inode;
5397
5398                 /* We ignore block quota on meta pool (MDTs), so needn't
5399                  * calculate how many blocks will be consumed by this index
5400                  * insert */
5401                 rc = osd_declare_inode_qid(env, i_uid_read(inode),
5402                                            i_gid_read(inode),
5403                                            i_projid_read(inode), 0,
5404                                            oh, osd_dt_obj(dt), NULL,
5405                                            OSD_QID_BLK);
5406         }
5407
5408         RETURN(rc);
5409 }
5410
5411 /**
5412  * Index add function for interoperability mode (b11826).
5413  * It will add the directory entry.This entry is needed to
5414  * maintain name->fid mapping.
5415  *
5416  * \param key it is key i.e. file entry to be inserted
5417  * \param rec it is value of given key i.e. fid
5418  *
5419  * \retval   0, on success
5420  * \retval -ve, on error
5421  */
5422 static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
5423                                const struct dt_rec *rec,
5424                                const struct dt_key *key, struct thandle *th,
5425                                int ignore_quota)
5426 {
5427         struct osd_object       *obj = osd_dt_obj(dt);
5428         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
5429         struct dt_insert_rec    *rec1   = (struct dt_insert_rec *)rec;
5430         const struct lu_fid     *fid    = rec1->rec_fid;
5431         const char              *name = (const char *)key;
5432         struct osd_thread_info  *oti   = osd_oti_get(env);
5433         struct inode            *child_inode = NULL;
5434         struct osd_idmap_cache  *idc;
5435         int                     rc;
5436         ENTRY;
5437
5438         if (!dt_object_exists(dt))
5439                 RETURN(-ENOENT);
5440
5441         LASSERT(osd_invariant(obj));
5442         LASSERT(!dt_object_remote(dt));
5443         LASSERT(th != NULL);
5444
5445         osd_trans_exec_op(env, th, OSD_OT_INSERT);
5446
5447         LASSERTF(fid_is_sane(fid), "fid"DFID" is insane!\n", PFID(fid));
5448
5449         idc = osd_idc_find(env, osd, fid);
5450         if (unlikely(idc == NULL)) {
5451                 /* this dt_insert() wasn't declared properly, so
5452                  * FID is missing in OI cache. we better do not
5453                  * lookup FID in FLDB/OI and don't risk to deadlock,
5454                  * but in some special cases (lfsck testing, etc)
5455                  * it's much simpler than fixing a caller */
5456                 CERROR("%s: "DFID" wasn't declared for insert\n",
5457                        osd_name(osd), PFID(fid));
5458                 dump_stack();
5459                 idc = osd_idc_find_or_init(env, osd, fid);
5460                 if (IS_ERR(idc))
5461                         RETURN(PTR_ERR(idc));
5462         }
5463
5464         if (idc->oic_remote) {
5465                 /* Insert remote entry */
5466                 if (strcmp(name, dotdot) == 0 && strlen(name) == 2) {
5467                         struct osd_mdobj_map    *omm = osd->od_mdt_map;
5468                         struct osd_thandle      *oh;
5469
5470                         /* If parent on remote MDT, we need put this object
5471                          * under AGENT */
5472                         oh = container_of(th, typeof(*oh), ot_super);
5473                         rc = osd_add_to_remote_parent(env, osd, obj, oh);
5474                         if (rc != 0) {
5475                                 CERROR("%s: add "DFID" error: rc = %d\n",
5476                                        osd_name(osd),
5477                                        PFID(lu_object_fid(&dt->do_lu)), rc);
5478                                 RETURN(rc);
5479                         }
5480
5481                         child_inode = igrab(omm->omm_remote_parent->d_inode);
5482                 } else {
5483                         child_inode = osd_create_local_agent_inode(env, osd,
5484                                         obj, fid, rec1->rec_type & S_IFMT, th);
5485                         if (IS_ERR(child_inode))
5486                                 RETURN(PTR_ERR(child_inode));
5487                 }
5488         } else {
5489                 /* Insert local entry */
5490                 if (unlikely(idc->oic_lid.oii_ino == 0)) {
5491                         /* for a reason OI cache wasn't filled properly */
5492                         CERROR("%s: OIC for "DFID" isn't filled\n",
5493                                osd_name(osd), PFID(fid));
5494                         RETURN(-EINVAL);
5495                 }
5496                 child_inode = oti->oti_inode;
5497                 if (unlikely(child_inode == NULL)) {
5498                         struct ldiskfs_inode_info *lii;
5499                         OBD_ALLOC_PTR(lii);
5500                         if (lii == NULL)
5501                                 RETURN(-ENOMEM);
5502                         child_inode = oti->oti_inode = &lii->vfs_inode;
5503                 }
5504                 child_inode->i_sb = osd_sb(osd);
5505                 child_inode->i_ino = idc->oic_lid.oii_ino;
5506                 child_inode->i_mode = rec1->rec_type & S_IFMT;
5507         }
5508
5509         rc = osd_ea_add_rec(env, obj, child_inode, name, fid, th);
5510
5511         CDEBUG(D_INODE, "parent %lu insert %s:%lu rc = %d\n",
5512                obj->oo_inode->i_ino, name, child_inode->i_ino, rc);
5513
5514         if (child_inode && child_inode != oti->oti_inode)
5515                 iput(child_inode);
5516         LASSERT(osd_invariant(obj));
5517         osd_trans_exec_check(env, th, OSD_OT_INSERT);
5518         RETURN(rc);
5519 }
5520
5521 /**
5522  *  Initialize osd Iterator for given osd index object.
5523  *
5524  *  \param  dt      osd index object
5525  */
5526
5527 static struct dt_it *osd_it_iam_init(const struct lu_env *env,
5528                                      struct dt_object *dt,
5529                                      __u32 unused)
5530 {
5531         struct osd_it_iam      *it;
5532         struct osd_object      *obj = osd_dt_obj(dt);
5533         struct lu_object       *lo  = &dt->do_lu;
5534         struct iam_path_descr  *ipd;
5535         struct iam_container   *bag = &obj->oo_dir->od_container;
5536
5537         if (!dt_object_exists(dt))
5538                 return ERR_PTR(-ENOENT);
5539
5540         OBD_ALLOC_PTR(it);
5541         if (it == NULL)
5542                 return ERR_PTR(-ENOMEM);
5543
5544         ipd = osd_it_ipd_get(env, bag);
5545         if (likely(ipd != NULL)) {
5546                 it->oi_obj = obj;
5547                 it->oi_ipd = ipd;
5548                 lu_object_get(lo);
5549                 iam_it_init(&it->oi_it, bag, IAM_IT_MOVE, ipd);
5550                 return (struct dt_it *)it;
5551         } else {
5552                 OBD_FREE_PTR(it);
5553                 return ERR_PTR(-ENOMEM);
5554         }
5555 }
5556
5557 /**
5558  * free given Iterator.
5559  */
5560 static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
5561 {
5562         struct osd_it_iam       *it  = (struct osd_it_iam *)di;
5563         struct osd_object       *obj = it->oi_obj;
5564
5565         iam_it_fini(&it->oi_it);
5566         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
5567         osd_object_put(env, obj);
5568         OBD_FREE_PTR(it);
5569 }
5570
5571 /**
5572  *  Move Iterator to record specified by \a key
5573  *
5574  *  \param  di      osd iterator
5575  *  \param  key     key for index
5576  *
5577  *  \retval +ve  di points to record with least key not larger than key
5578  *  \retval  0   di points to exact matched key
5579  *  \retval -ve  failure
5580  */
5581
5582 static int osd_it_iam_get(const struct lu_env *env,
5583                           struct dt_it *di, const struct dt_key *key)
5584 {
5585         struct osd_thread_info  *oti = osd_oti_get(env);
5586         struct osd_it_iam       *it = (struct osd_it_iam *)di;
5587
5588         if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
5589                 /* swab quota uid/gid */
5590                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5591                 key = (struct dt_key *)&oti->oti_quota_id;
5592         }
5593
5594         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
5595 }
5596
5597 /**
5598  *  Release Iterator
5599  *
5600  *  \param  di      osd iterator
5601  */
5602 static void osd_it_iam_put(const struct lu_env *env, struct dt_it *di)
5603 {
5604         struct osd_it_iam *it = (struct osd_it_iam *)di;
5605
5606         iam_it_put(&it->oi_it);
5607 }
5608
5609 /**
5610  *  Move iterator by one record
5611  *
5612  *  \param  di      osd iterator
5613  *
5614  *  \retval +1   end of container reached
5615  *  \retval  0   success
5616  *  \retval -ve  failure
5617  */
5618
5619 static int osd_it_iam_next(const struct lu_env *env, struct dt_it *di)
5620 {
5621         struct osd_it_iam *it = (struct osd_it_iam *)di;
5622
5623         return iam_it_next(&it->oi_it);
5624 }
5625
5626 /**
5627  * Return pointer to the key under iterator.
5628  */
5629
5630 static struct dt_key *osd_it_iam_key(const struct lu_env *env,
5631                                  const struct dt_it *di)
5632 {
5633         struct osd_thread_info *oti = osd_oti_get(env);
5634         struct osd_it_iam      *it = (struct osd_it_iam *)di;
5635         struct osd_object      *obj = it->oi_obj;
5636         struct dt_key          *key;
5637
5638         key = (struct dt_key *)iam_it_key_get(&it->oi_it);
5639
5640         if (!IS_ERR(key) && fid_is_quota(lu_object_fid(&obj->oo_dt.do_lu))) {
5641                 /* swab quota uid/gid */
5642                 oti->oti_quota_id = le64_to_cpu(*((__u64 *)key));
5643                 key = (struct dt_key *)&oti->oti_quota_id;
5644         }
5645
5646         return key;
5647 }
5648
5649 /**
5650  * Return size of key under iterator (in bytes)
5651  */
5652
5653 static int osd_it_iam_key_size(const struct lu_env *env, const struct dt_it *di)
5654 {
5655         struct osd_it_iam *it = (struct osd_it_iam *)di;
5656
5657         return iam_it_key_size(&it->oi_it);
5658 }
5659
5660 static inline void
5661 osd_it_append_attrs(struct lu_dirent *ent, int len, __u16 type)
5662 {
5663         /* check if file type is required */
5664         if (ent->lde_attrs & LUDA_TYPE) {
5665                 struct luda_type *lt;
5666                 int align = sizeof(*lt) - 1;
5667
5668                 len = (len + align) & ~align;
5669                 lt = (struct luda_type *)(ent->lde_name + len);
5670                 lt->lt_type = cpu_to_le16(DTTOIF(type));
5671         }
5672
5673         ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
5674 }
5675
5676 /**
5677  * build lu direct from backend fs dirent.
5678  */
5679
5680 static inline void
5681 osd_it_pack_dirent(struct lu_dirent *ent, struct lu_fid *fid, __u64 offset,
5682                    char *name, __u16 namelen, __u16 type, __u32 attr)
5683 {
5684         ent->lde_attrs = attr | LUDA_FID;
5685         fid_cpu_to_le(&ent->lde_fid, fid);
5686
5687         ent->lde_hash = cpu_to_le64(offset);
5688         ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
5689
5690         strncpy(ent->lde_name, name, namelen);
5691         ent->lde_name[namelen] = '\0';
5692         ent->lde_namelen = cpu_to_le16(namelen);
5693
5694         /* append lustre attributes */
5695         osd_it_append_attrs(ent, namelen, type);
5696 }
5697
5698 /**
5699  * Return pointer to the record under iterator.
5700  */
5701 static int osd_it_iam_rec(const struct lu_env *env,
5702                           const struct dt_it *di,
5703                           struct dt_rec *dtrec, __u32 attr)
5704 {
5705         struct osd_it_iam      *it   = (struct osd_it_iam *)di;
5706         struct osd_thread_info *info = osd_oti_get(env);
5707         ENTRY;
5708
5709         if (S_ISDIR(it->oi_obj->oo_inode->i_mode)) {
5710                 const struct osd_fid_pack *rec;
5711                 struct lu_fid             *fid = &info->oti_fid;
5712                 struct lu_dirent          *lde = (struct lu_dirent *)dtrec;
5713                 char                      *name;
5714                 int                        namelen;
5715                 __u64                      hash;
5716                 int                        rc;
5717
5718                 name = (char *)iam_it_key_get(&it->oi_it);
5719                 if (IS_ERR(name))
5720                         RETURN(PTR_ERR(name));
5721
5722                 namelen = iam_it_key_size(&it->oi_it);
5723
5724                 rec = (const struct osd_fid_pack *)iam_it_rec_get(&it->oi_it);
5725                 if (IS_ERR(rec))
5726                         RETURN(PTR_ERR(rec));
5727
5728                 rc = osd_fid_unpack(fid, rec);
5729                 if (rc)
5730                         RETURN(rc);
5731
5732                 hash = iam_it_store(&it->oi_it);
5733
5734                 /* IAM does not store object type in IAM index (dir) */
5735                 osd_it_pack_dirent(lde, fid, hash, name, namelen,
5736                                    0, LUDA_FID);
5737         } else if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
5738                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
5739                            (struct iam_rec *)dtrec);
5740                 osd_quota_unpack(it->oi_obj, dtrec);
5741         } else {
5742                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
5743                            (struct iam_rec *)dtrec);
5744         }
5745
5746         RETURN(0);
5747 }
5748
5749 /**
5750  * Returns cookie for current Iterator position.
5751  */
5752 static __u64 osd_it_iam_store(const struct lu_env *env, const struct dt_it *di)
5753 {
5754         struct osd_it_iam *it = (struct osd_it_iam *)di;
5755
5756         return iam_it_store(&it->oi_it);
5757 }
5758
5759 /**
5760  * Restore iterator from cookie.
5761  *
5762  * \param  di      osd iterator
5763  * \param  hash    Iterator location cookie
5764  *
5765  * \retval +ve  di points to record with least key not larger than key.
5766  * \retval  0   di points to exact matched key
5767  * \retval -ve  failure
5768  */
5769
5770 static int osd_it_iam_load(const struct lu_env *env,
5771                            const struct dt_it *di, __u64 hash)
5772 {
5773         struct osd_it_iam *it = (struct osd_it_iam *)di;
5774
5775         return iam_it_load(&it->oi_it, hash);
5776 }
5777
5778 static const struct dt_index_operations osd_index_iam_ops = {
5779         .dio_lookup         = osd_index_iam_lookup,
5780         .dio_declare_insert = osd_index_declare_iam_insert,
5781         .dio_insert         = osd_index_iam_insert,
5782         .dio_declare_delete = osd_index_declare_iam_delete,
5783         .dio_delete         = osd_index_iam_delete,
5784         .dio_it     = {
5785                 .init     = osd_it_iam_init,
5786                 .fini     = osd_it_iam_fini,
5787                 .get      = osd_it_iam_get,
5788                 .put      = osd_it_iam_put,
5789                 .next     = osd_it_iam_next,
5790                 .key      = osd_it_iam_key,
5791                 .key_size = osd_it_iam_key_size,
5792                 .rec      = osd_it_iam_rec,
5793                 .store    = osd_it_iam_store,
5794                 .load     = osd_it_iam_load
5795         }
5796 };
5797
5798
5799 /**
5800  * Creates or initializes iterator context.
5801  *
5802  * \retval struct osd_it_ea, iterator structure on success
5803  *
5804  */
5805 static struct dt_it *osd_it_ea_init(const struct lu_env *env,
5806                                     struct dt_object *dt,
5807                                     __u32 attr)
5808 {
5809         struct osd_object       *obj  = osd_dt_obj(dt);
5810         struct osd_thread_info  *info = osd_oti_get(env);
5811         struct osd_it_ea        *oie;
5812         struct file             *file;
5813         struct lu_object        *lo   = &dt->do_lu;
5814         struct dentry           *obj_dentry;
5815         ENTRY;
5816
5817         if (!dt_object_exists(dt) || obj->oo_destroyed)
5818                 RETURN(ERR_PTR(-ENOENT));
5819
5820         OBD_SLAB_ALLOC_PTR_GFP(oie, osd_itea_cachep, GFP_NOFS);
5821         if (oie == NULL)
5822                 RETURN(ERR_PTR(-ENOMEM));
5823         obj_dentry = &oie->oie_dentry;
5824
5825         obj_dentry->d_inode = obj->oo_inode;
5826         obj_dentry->d_sb = osd_sb(osd_obj2dev(obj));
5827         obj_dentry->d_name.hash = 0;
5828
5829         oie->oie_rd_dirent       = 0;
5830         oie->oie_it_dirent       = 0;
5831         oie->oie_dirent          = NULL;
5832         if (unlikely(!info->oti_it_ea_buf_used)) {
5833                 oie->oie_buf = info->oti_it_ea_buf;
5834                 info->oti_it_ea_buf_used = 1;
5835         } else {
5836                 OBD_ALLOC(oie->oie_buf, OSD_IT_EA_BUFSIZE);
5837                 if (oie->oie_buf == NULL)
5838                         RETURN(ERR_PTR(-ENOMEM));
5839         }
5840         oie->oie_obj             = obj;
5841
5842         file = &oie->oie_file;
5843
5844         /* Only FMODE_64BITHASH or FMODE_32BITHASH should be set, NOT both. */
5845         if (attr & LUDA_64BITHASH)
5846                 file->f_mode    = FMODE_64BITHASH;
5847         else
5848                 file->f_mode    = FMODE_32BITHASH;
5849         file->f_path.dentry     = obj_dentry;
5850         file->f_mapping         = obj->oo_inode->i_mapping;
5851         file->f_op              = obj->oo_inode->i_fop;
5852         set_file_inode(file, obj->oo_inode);
5853
5854         lu_object_get(lo);
5855         RETURN((struct dt_it *) oie);
5856 }
5857
5858 /**
5859  * Destroy or finishes iterator context.
5860  *
5861  * \param di iterator structure to be destroyed
5862  */
5863 static void osd_it_ea_fini(const struct lu_env *env, struct dt_it *di)
5864 {
5865         struct osd_thread_info  *info = osd_oti_get(env);
5866         struct osd_it_ea        *oie    = (struct osd_it_ea *)di;
5867         struct osd_object       *obj    = oie->oie_obj;
5868         struct inode            *inode  = obj->oo_inode;
5869
5870         ENTRY;
5871         oie->oie_file.f_op->release(inode, &oie->oie_file);
5872         osd_object_put(env, obj);
5873         if (unlikely(oie->oie_buf != info->oti_it_ea_buf))
5874                 OBD_FREE(oie->oie_buf, OSD_IT_EA_BUFSIZE);
5875         else
5876                 info->oti_it_ea_buf_used = 0;
5877         OBD_SLAB_FREE_PTR(oie, osd_itea_cachep);
5878         EXIT;
5879 }
5880
5881 /**
5882  * It position the iterator at given key, so that next lookup continues from
5883  * that key Or it is similar to dio_it->load() but based on a key,
5884  * rather than file position.
5885  *
5886  * As a special convention, osd_it_ea_get(env, di, "") has to rewind iterator
5887  * to the beginning.
5888  *
5889  * TODO: Presently return +1 considering it is only used by mdd_dir_is_empty().
5890  */
5891 static int osd_it_ea_get(const struct lu_env *env,
5892                          struct dt_it *di, const struct dt_key *key)
5893 {
5894         struct osd_it_ea     *it   = (struct osd_it_ea *)di;
5895
5896         ENTRY;
5897         LASSERT(((const char *)key)[0] == '\0');
5898         it->oie_file.f_pos      = 0;
5899         it->oie_rd_dirent       = 0;
5900         it->oie_it_dirent       = 0;
5901         it->oie_dirent          = NULL;
5902
5903         RETURN(+1);
5904 }
5905
5906 /**
5907  * Does nothing
5908  */
5909 static void osd_it_ea_put(const struct lu_env *env, struct dt_it *di)
5910 {
5911 }
5912
5913 struct osd_filldir_cbs {
5914 #ifdef HAVE_DIR_CONTEXT
5915         struct dir_context ctx;
5916 #endif
5917         struct osd_it_ea  *it;
5918 };
5919 /**
5920  * It is called internally by ->readdir(). It fills the
5921  * iterator's in-memory data structure with required
5922  * information i.e. name, namelen, rec_size etc.
5923  *
5924  * \param buf in which information to be filled in.
5925  * \param name name of the file in given dir
5926  *
5927  * \retval 0 on success
5928  * \retval 1 on buffer full
5929  */
5930 #ifdef HAVE_FILLDIR_USE_CTX
5931 static int osd_ldiskfs_filldir(struct dir_context *buf,
5932 #else
5933 static int osd_ldiskfs_filldir(void *buf,
5934 #endif
5935                                const char *name, int namelen,
5936                                loff_t offset, __u64 ino, unsigned d_type)
5937 {
5938         struct osd_it_ea        *it   =
5939                 ((struct osd_filldir_cbs *)buf)->it;
5940         struct osd_object       *obj  = it->oie_obj;
5941         struct osd_it_ea_dirent *ent  = it->oie_dirent;
5942         struct lu_fid           *fid  = &ent->oied_fid;
5943         struct osd_fid_pack     *rec;
5944         ENTRY;
5945
5946         /* this should never happen */
5947         if (unlikely(namelen == 0 || namelen > LDISKFS_NAME_LEN)) {
5948                 CERROR("ldiskfs return invalid namelen %d\n", namelen);
5949                 RETURN(-EIO);
5950         }
5951
5952         if ((void *) ent - it->oie_buf + sizeof(*ent) + namelen >
5953             OSD_IT_EA_BUFSIZE)
5954                 RETURN(1);
5955
5956         /* "." is just the object itself. */
5957         if (namelen == 1 && name[0] == '.') {
5958                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
5959         } else if (d_type & LDISKFS_DIRENT_LUFID) {
5960                 rec = (struct osd_fid_pack*) (name + namelen + 1);
5961                 if (osd_fid_unpack(fid, rec) != 0)
5962                         fid_zero(fid);
5963         } else {
5964                 fid_zero(fid);
5965         }
5966         d_type &= ~LDISKFS_DIRENT_LUFID;
5967
5968         /* NOT export local root. */
5969         if (unlikely(osd_sb(osd_obj2dev(obj))->s_root->d_inode->i_ino == ino)) {
5970                 ino = obj->oo_inode->i_ino;
5971                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
5972         }
5973
5974         ent->oied_ino     = ino;
5975         ent->oied_off     = offset;
5976         ent->oied_namelen = namelen;
5977         ent->oied_type    = d_type;
5978
5979         memcpy(ent->oied_name, name, namelen);
5980
5981         it->oie_rd_dirent++;
5982         it->oie_dirent = (void *) ent + cfs_size_round(sizeof(*ent) + namelen);
5983         RETURN(0);
5984 }
5985
5986 /**
5987  * Calls ->readdir() to load a directory entry at a time
5988  * and stored it in iterator's in-memory data structure.
5989  *
5990  * \param di iterator's in memory structure
5991  *
5992  * \retval   0 on success
5993  * \retval -ve on error
5994  * \retval +1 reach the end of entry
5995  */
5996 static int osd_ldiskfs_it_fill(const struct lu_env *env,
5997                                const struct dt_it *di)
5998 {
5999         struct osd_it_ea   *it    = (struct osd_it_ea *)di;
6000         struct osd_object  *obj   = it->oie_obj;
6001         struct inode       *inode = obj->oo_inode;
6002         struct htree_lock  *hlock = NULL;
6003         struct file        *filp  = &it->oie_file;
6004         int                 rc = 0;
6005         struct osd_filldir_cbs buf = {
6006 #ifdef HAVE_DIR_CONTEXT
6007                 .ctx.actor = osd_ldiskfs_filldir,
6008 #endif
6009                 .it = it
6010         };
6011
6012         ENTRY;
6013         it->oie_dirent = it->oie_buf;
6014         it->oie_rd_dirent = 0;
6015
6016         if (obj->oo_hl_head != NULL) {
6017                 hlock = osd_oti_get(env)->oti_hlock;
6018                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
6019                                    inode, LDISKFS_HLOCK_READDIR);
6020         } else {
6021                 down_read(&obj->oo_ext_idx_sem);
6022         }
6023
6024 #ifdef HAVE_DIR_CONTEXT
6025         buf.ctx.pos = filp->f_pos;
6026         rc = inode->i_fop->iterate(filp, &buf.ctx);
6027         filp->f_pos = buf.ctx.pos;
6028 #else
6029         rc = inode->i_fop->readdir(filp, &buf, osd_ldiskfs_filldir);
6030 #endif
6031
6032         if (hlock != NULL)
6033                 ldiskfs_htree_unlock(hlock);
6034         else
6035                 up_read(&obj->oo_ext_idx_sem);
6036
6037         if (it->oie_rd_dirent == 0) {
6038                 /*If it does not get any dirent, it means it has been reached
6039                  *to the end of the dir */
6040                 it->oie_file.f_pos = ldiskfs_get_htree_eof(&it->oie_file);
6041                 if (rc == 0)
6042                         rc = 1;
6043         } else {
6044                 it->oie_dirent = it->oie_buf;
6045                 it->oie_it_dirent = 1;
6046         }
6047
6048         RETURN(rc);
6049 }
6050
6051 /**
6052  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
6053  * to load a directory entry at a time and stored it in
6054  * iterator's in-memory data structure.
6055  *
6056  * \param di iterator's in memory structure
6057  *
6058  * \retval +ve iterator reached to end
6059  * \retval   0 iterator not reached to end
6060  * \retval -ve on error
6061  */
6062 static int osd_it_ea_next(const struct lu_env *env, struct dt_it *di)
6063 {
6064         struct osd_it_ea *it = (struct osd_it_ea *)di;
6065         int rc;
6066
6067         ENTRY;
6068
6069         if (it->oie_it_dirent < it->oie_rd_dirent) {
6070                 it->oie_dirent =
6071                         (void *) it->oie_dirent +
6072                         cfs_size_round(sizeof(struct osd_it_ea_dirent) +
6073                                        it->oie_dirent->oied_namelen);
6074                 it->oie_it_dirent++;
6075                 RETURN(0);
6076         } else {
6077                 if (it->oie_file.f_pos == ldiskfs_get_htree_eof(&it->oie_file))
6078                         rc = +1;
6079                 else
6080                         rc = osd_ldiskfs_it_fill(env, di);
6081         }
6082
6083         RETURN(rc);
6084 }
6085
6086 /**
6087  * Returns the key at current position from iterator's in memory structure.
6088  *
6089  * \param di iterator's in memory structure
6090  *
6091  * \retval key i.e. struct dt_key on success
6092  */
6093 static struct dt_key *osd_it_ea_key(const struct lu_env *env,
6094                                     const struct dt_it *di)
6095 {
6096         struct osd_it_ea *it = (struct osd_it_ea *)di;
6097
6098         return (struct dt_key *)it->oie_dirent->oied_name;
6099 }
6100
6101 /**
6102  * Returns the key's size at current position from iterator's in memory structure.
6103  *
6104  * \param di iterator's in memory structure
6105  *
6106  * \retval key_size i.e. struct dt_key on success
6107  */
6108 static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
6109 {
6110         struct osd_it_ea *it = (struct osd_it_ea *)di;
6111
6112         return it->oie_dirent->oied_namelen;
6113 }
6114
6115 static inline bool osd_dotdot_has_space(struct ldiskfs_dir_entry_2 *de)
6116 {
6117         if (LDISKFS_DIR_REC_LEN(de) >=
6118             __LDISKFS_DIR_REC_LEN(2 + 1 + sizeof(struct osd_fid_pack)))
6119                 return true;
6120
6121         return false;
6122 }
6123
6124 static inline bool
6125 osd_dirent_has_space(struct ldiskfs_dir_entry_2 *de, __u16 namelen,
6126                      unsigned blocksize, bool dotdot)
6127 {
6128         if (dotdot)
6129                 return osd_dotdot_has_space(de);
6130
6131         if (ldiskfs_rec_len_from_disk(de->rec_len, blocksize) >=
6132             __LDISKFS_DIR_REC_LEN(namelen + 1 + sizeof(struct osd_fid_pack)))
6133                 return true;
6134
6135         return false;
6136 }
6137
6138 static int
6139 osd_dirent_reinsert(const struct lu_env *env, struct osd_device *dev,
6140                     handle_t *jh, struct dentry *dentry,
6141                     const struct lu_fid *fid, struct buffer_head *bh,
6142                     struct ldiskfs_dir_entry_2 *de, struct htree_lock *hlock,
6143                     bool dotdot)
6144 {
6145         struct inode                *dir        = dentry->d_parent->d_inode;
6146         struct inode                *inode      = dentry->d_inode;
6147         struct osd_fid_pack         *rec;
6148         struct ldiskfs_dentry_param *ldp;
6149         int                          namelen    = dentry->d_name.len;
6150         int                          rc;
6151         struct osd_thread_info     *info        = osd_oti_get(env);
6152         ENTRY;
6153
6154         if (!LDISKFS_HAS_INCOMPAT_FEATURE(inode->i_sb,
6155                                           LDISKFS_FEATURE_INCOMPAT_DIRDATA))
6156                 RETURN(0);
6157
6158         /* There is enough space to hold the FID-in-dirent. */
6159         if (osd_dirent_has_space(de, namelen, dir->i_sb->s_blocksize, dotdot)) {
6160                 rc = ldiskfs_journal_get_write_access(jh, bh);
6161                 if (rc != 0)
6162                         RETURN(rc);
6163
6164                 de->name[namelen] = 0;
6165                 rec = (struct osd_fid_pack *)(de->name + namelen + 1);
6166                 rec->fp_len = sizeof(struct lu_fid) + 1;
6167                 fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
6168                 de->file_type |= LDISKFS_DIRENT_LUFID;
6169                 rc = ldiskfs_handle_dirty_metadata(jh, NULL, bh);
6170
6171                 RETURN(rc);
6172         }
6173
6174         LASSERT(!dotdot);
6175
6176         rc = ldiskfs_delete_entry(jh, dir, de, bh);
6177         if (rc != 0)
6178                 RETURN(rc);
6179
6180         ldp = (struct ldiskfs_dentry_param *)osd_oti_get(env)->oti_ldp;
6181         osd_get_ldiskfs_dirent_param(ldp, fid);
6182         dentry->d_fsdata = (void *)ldp;
6183         ll_vfs_dq_init(dir);
6184         rc = osd_ldiskfs_add_entry(info, dev, jh, dentry, inode, hlock);
6185         /* It is too bad, we cannot reinsert the name entry back.
6186          * That means we lose it! */
6187         if (rc != 0)
6188                 CDEBUG(D_LFSCK, "%s: fail to reinsert the dirent, "
6189                        "dir = %lu/%u, name = %.*s, "DFID": rc = %d\n",
6190                        osd_ino2name(inode),
6191                        dir->i_ino, dir->i_generation, namelen,
6192                        dentry->d_name.name, PFID(fid), rc);
6193
6194         RETURN(rc);
6195 }
6196
6197 static int
6198 osd_dirent_check_repair(const struct lu_env *env, struct osd_object *obj,
6199                         struct osd_it_ea *it, struct lu_fid *fid,
6200                         struct osd_inode_id *id, __u32 *attr)
6201 {
6202         struct osd_thread_info     *info        = osd_oti_get(env);
6203         struct lustre_mdt_attrs    *lma         = &info->oti_ost_attrs.loa_lma;
6204         struct osd_device          *dev         = osd_obj2dev(obj);
6205         struct super_block         *sb          = osd_sb(dev);
6206         const char                 *devname     = osd_name(dev);
6207         struct osd_it_ea_dirent    *ent         = it->oie_dirent;
6208         struct inode               *dir         = obj->oo_inode;
6209         struct htree_lock          *hlock       = NULL;
6210         struct buffer_head         *bh          = NULL;
6211         handle_t                   *jh          = NULL;
6212         struct ldiskfs_dir_entry_2 *de;
6213         struct dentry              *dentry;
6214         struct inode               *inode;
6215         const struct lu_fid *pfid = lu_object_fid(&obj->oo_dt.do_lu);
6216         int                         credits;
6217         int                         rc;
6218         bool                        dotdot      = false;
6219         bool                        dirty       = false;
6220         ENTRY;
6221
6222         if (ent->oied_name[0] == '.') {
6223                 if (ent->oied_namelen == 1)
6224                         RETURN(0);
6225
6226                 if (ent->oied_namelen == 2 && ent->oied_name[1] == '.')
6227                         dotdot = true;
6228         }
6229
6230         osd_id_gen(id, ent->oied_ino, OSD_OII_NOGEN);
6231         inode = osd_iget(info, dev, id);
6232         if (IS_ERR(inode)) {
6233                 rc = PTR_ERR(inode);
6234                 if (rc == -ENOENT || rc == -ESTALE) {
6235                         /* Maybe dangling name entry, or
6236                          * corrupted directory entry. */
6237                         *attr |= LUDA_UNKNOWN;
6238                         rc = 0;
6239                 } else {
6240                         CDEBUG(D_LFSCK, "%s: fail to iget() for dirent "
6241                                "check_repair, dir = %lu/%u, name = %.*s, "
6242                                "ino = %llu, rc = %d\n",
6243                                devname, dir->i_ino, dir->i_generation,
6244                                ent->oied_namelen, ent->oied_name,
6245                                ent->oied_ino, rc);
6246                 }
6247
6248                 RETURN(rc);
6249         }
6250
6251         dentry = osd_child_dentry_by_inode(env, dir, ent->oied_name,
6252                                            ent->oied_namelen);
6253         rc = osd_get_lma(info, inode, dentry, &info->oti_ost_attrs);
6254         if (rc == -ENODATA || !fid_is_sane(&lma->lma_self_fid))
6255                 lma = NULL;
6256         else if (rc != 0)
6257                 GOTO(out, rc);
6258
6259         /* We need to ensure that the name entry is still valid.
6260          * Because it may be removed or renamed by other already.
6261          *
6262          * The unlink or rename operation will start journal before PDO lock,
6263          * so to avoid deadlock, here we need to start journal handle before
6264          * related PDO lock also. But because we do not know whether there
6265          * will be something to be repaired before PDO lock, we just start
6266          * journal without conditions.
6267          *
6268          * We may need to remove the name entry firstly, then insert back.
6269          * One credit is for user quota file update.
6270          * One credit is for group quota file update.
6271          * Two credits are for dirty inode. */
6272         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE] +
6273                   osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1 + 1 + 2;
6274
6275         if (dev->od_dirent_journal != 0) {
6276
6277 again:
6278                 jh = osd_journal_start_sb(sb, LDISKFS_HT_MISC, credits);
6279                 if (IS_ERR(jh)) {
6280                         rc = PTR_ERR(jh);
6281                         CDEBUG(D_LFSCK, "%s: fail to start trans for dirent "
6282                                "check_repair, dir = %lu/%u, credits = %d, "
6283                                "name = %.*s, ino = %llu: rc = %d\n",
6284                                devname, dir->i_ino, dir->i_generation, credits,
6285                                ent->oied_namelen, ent->oied_name,
6286                                ent->oied_ino, rc);
6287
6288                         GOTO(out_inode, rc);
6289                 }
6290
6291                 if (obj->oo_hl_head != NULL) {
6292                         hlock = osd_oti_get(env)->oti_hlock;
6293                         /* "0" means exclusive lock for the whole directory.
6294                          * We need to prevent others access such name entry
6295                          * during the delete + insert. Neither HLOCK_ADD nor
6296                          * HLOCK_DEL cannot guarantee the atomicity. */
6297                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir, 0);
6298                 } else {
6299                         down_write(&obj->oo_ext_idx_sem);
6300                 }
6301         } else {
6302                 if (obj->oo_hl_head != NULL) {
6303                         hlock = osd_oti_get(env)->oti_hlock;
6304                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir,
6305                                            LDISKFS_HLOCK_LOOKUP);
6306                 } else {
6307                         down_read(&obj->oo_ext_idx_sem);
6308                 }
6309         }
6310
6311         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
6312         if (IS_ERR(bh) || le32_to_cpu(de->inode) != inode->i_ino) {
6313                 *attr |= LUDA_IGNORE;
6314
6315                 GOTO(out, rc = 0);
6316         }
6317
6318         /* For dotdot entry, if there is not enough space to hold the
6319          * FID-in-dirent, just keep them there. It only happens when the
6320          * device upgraded from 1.8 or restored from MDT file-level backup.
6321          * For the whole directory, only dotdot entry have no FID-in-dirent
6322          * and needs to get FID from LMA when readdir, it will not affect the
6323          * performance much. */
6324         if (dotdot && !osd_dotdot_has_space(de)) {
6325                 *attr |= LUDA_UNKNOWN;
6326
6327                 GOTO(out, rc = 0);
6328         }
6329
6330         if (lma != NULL) {
6331                 if (lu_fid_eq(fid, &lma->lma_self_fid))
6332                         GOTO(out, rc = 0);
6333
6334                 if (unlikely(lma->lma_compat & LMAC_NOT_IN_OI)) {
6335                         struct lu_fid *tfid = &lma->lma_self_fid;
6336
6337                         if (likely(dotdot &&
6338                                    fid_seq(tfid) == FID_SEQ_LOCAL_FILE &&
6339                                    fid_oid(tfid) == REMOTE_PARENT_DIR_OID)) {
6340                                 /* It must be REMOTE_PARENT_DIR and as the
6341                                  * 'dotdot' entry of remote directory */
6342                                 *attr |= LUDA_IGNORE;
6343                         } else {
6344                                 CDEBUG(D_LFSCK, "%s: expect remote agent "
6345                                        "parent directory, but got %.*s under "
6346                                        "dir = %lu/%u with the FID "DFID"\n",
6347                                        devname, ent->oied_namelen,
6348                                        ent->oied_name, dir->i_ino,
6349                                        dir->i_generation, PFID(tfid));
6350
6351                                 *attr |= LUDA_UNKNOWN;
6352                         }
6353
6354                         GOTO(out, rc = 0);
6355                 }
6356         }
6357
6358         if (!fid_is_zero(fid)) {
6359                 rc = osd_verify_ent_by_linkea(env, inode, pfid, ent->oied_name,
6360                                               ent->oied_namelen);
6361                 if (rc == -ENOENT ||
6362                     (rc == -ENODATA &&
6363                      !(dev->od_scrub.os_file.sf_flags & SF_UPGRADE))) {
6364                         /* linkEA does not recognize the dirent entry,
6365                          * it may because the dirent entry corruption
6366                          * and points to other's inode. */
6367                         CDEBUG(D_LFSCK, "%s: the target inode does not "
6368                                "recognize the dirent, dir = %lu/%u, "
6369                                " name = %.*s, ino = %llu, "
6370                                DFID": rc = %d\n", devname, dir->i_ino,
6371                                dir->i_generation, ent->oied_namelen,
6372                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
6373                         *attr |= LUDA_UNKNOWN;
6374
6375                         GOTO(out, rc = 0);
6376                 }
6377
6378                 if (rc && rc != -ENODATA) {
6379                         CDEBUG(D_LFSCK, "%s: fail to verify FID in the dirent, "
6380                                "dir = %lu/%u, name = %.*s, ino = %llu, "
6381                                DFID": rc = %d\n", devname, dir->i_ino,
6382                                dir->i_generation, ent->oied_namelen,
6383                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
6384                         *attr |= LUDA_UNKNOWN;
6385
6386                         GOTO(out, rc = 0);
6387                 }
6388         }
6389
6390         if (lma != NULL) {
6391                 /* linkEA recognizes the dirent entry, the FID-in-LMA is
6392                  * valid, trusted, in spite of fid_is_sane(fid) or not. */
6393                 if (*attr & LUDA_VERIFY_DRYRUN) {
6394                         *fid = lma->lma_self_fid;
6395                         *attr |= LUDA_REPAIR;
6396
6397                         GOTO(out, rc = 0);
6398                 }
6399
6400                 if (jh == NULL) {
6401                         brelse(bh);
6402                         dev->od_dirent_journal = 1;
6403                         if (hlock != NULL) {
6404                                 ldiskfs_htree_unlock(hlock);
6405                                 hlock = NULL;
6406                         } else {
6407                                 up_read(&obj->oo_ext_idx_sem);
6408                         }
6409
6410                         goto again;
6411                 }
6412
6413                 *fid = lma->lma_self_fid;
6414                 dirty = true;
6415                 /* Update or append the FID-in-dirent. */
6416                 rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
6417                                          bh, de, hlock, dotdot);
6418                 if (rc == 0)
6419                         *attr |= LUDA_REPAIR;
6420                 else
6421                         CDEBUG(D_LFSCK, "%s: fail to re-insert FID after "
6422                                "the dirent, dir = %lu/%u, name = %.*s, "
6423                                "ino = %llu, "DFID": rc = %d\n",
6424                                devname, dir->i_ino, dir->i_generation,
6425                                ent->oied_namelen, ent->oied_name,
6426                                ent->oied_ino, PFID(fid), rc);
6427         } else {
6428                 /* lma is NULL, trust the FID-in-dirent if it is valid. */
6429                 if (*attr & LUDA_VERIFY_DRYRUN) {
6430                         if (fid_is_sane(fid)) {
6431                                 *attr |= LUDA_REPAIR;
6432                         } else if (dev->od_index == 0) {
6433                                 lu_igif_build(fid, inode->i_ino,
6434                                               inode->i_generation);
6435                                 *attr |= LUDA_UPGRADE;
6436                         }
6437
6438                         GOTO(out, rc = 0);
6439                 }
6440
6441                 if (jh == NULL) {
6442                         brelse(bh);
6443                         dev->od_dirent_journal = 1;
6444                         if (hlock != NULL) {
6445                                 ldiskfs_htree_unlock(hlock);
6446                                 hlock = NULL;
6447                         } else {
6448                                 up_read(&obj->oo_ext_idx_sem);
6449                         }
6450
6451                         goto again;
6452                 }
6453
6454                 dirty = true;
6455                 if (unlikely(fid_is_sane(fid))) {
6456                         /* FID-in-dirent exists, but FID-in-LMA is lost.
6457                          * Trust the FID-in-dirent, and add FID-in-LMA. */
6458                         rc = osd_ea_fid_set(info, inode, fid, 0, 0);
6459                         if (rc == 0)
6460                                 *attr |= LUDA_REPAIR;
6461                         else
6462                                 CDEBUG(D_LFSCK, "%s: fail to set LMA for "
6463                                        "update dirent, dir = %lu/%u, "
6464                                        "name = %.*s, ino = %llu, "
6465                                        DFID": rc = %d\n",
6466                                        devname, dir->i_ino, dir->i_generation,
6467                                        ent->oied_namelen, ent->oied_name,
6468                                        ent->oied_ino, PFID(fid), rc);
6469                 } else if (dev->od_index == 0) {
6470                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
6471                         /* It is probably IGIF object. Only aappend the
6472                          * FID-in-dirent. OI scrub will process FID-in-LMA. */
6473                         rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
6474                                                  bh, de, hlock, dotdot);
6475                         if (rc == 0)
6476                                 *attr |= LUDA_UPGRADE;
6477                         else
6478                                 CDEBUG(D_LFSCK, "%s: fail to append IGIF "
6479                                        "after the dirent, dir = %lu/%u, "
6480                                        "name = %.*s, ino = %llu, "
6481                                        DFID": rc = %d\n",
6482                                        devname, dir->i_ino, dir->i_generation,
6483                                        ent->oied_namelen, ent->oied_name,
6484                                        ent->oied_ino, PFID(fid), rc);
6485                 }
6486         }
6487
6488         GOTO(out, rc);
6489
6490 out:
6491         if (!IS_ERR(bh))
6492                 brelse(bh);
6493         if (hlock != NULL) {
6494                 ldiskfs_htree_unlock(hlock);
6495         } else {
6496                 if (dev->od_dirent_journal != 0)
6497                         up_write(&obj->oo_ext_idx_sem);
6498                 else
6499                         up_read(&obj->oo_ext_idx_sem);
6500         }
6501
6502         if (jh != NULL)
6503                 ldiskfs_journal_stop(jh);
6504
6505 out_inode:
6506         iput(inode);
6507         if (rc >= 0 && !dirty)
6508                 dev->od_dirent_journal = 0;
6509
6510         return rc;
6511 }
6512
6513 /**
6514  * Returns the value at current position from iterator's in memory structure.
6515  *
6516  * \param di struct osd_it_ea, iterator's in memory structure
6517  * \param attr attr requested for dirent.
6518  * \param lde lustre dirent
6519  *
6520  * \retval   0 no error and \param lde has correct lustre dirent.
6521  * \retval -ve on error
6522  */
6523 static inline int osd_it_ea_rec(const struct lu_env *env,
6524                                 const struct dt_it *di,
6525                                 struct dt_rec *dtrec, __u32 attr)
6526 {
6527         struct osd_it_ea       *it    = (struct osd_it_ea *)di;
6528         struct osd_object      *obj   = it->oie_obj;
6529         struct osd_device      *dev   = osd_obj2dev(obj);
6530         struct osd_thread_info *oti   = osd_oti_get(env);
6531         struct osd_inode_id    *id    = &oti->oti_id;
6532         struct lu_fid          *fid   = &it->oie_dirent->oied_fid;
6533         struct lu_dirent       *lde   = (struct lu_dirent *)dtrec;
6534         __u32                   ino   = it->oie_dirent->oied_ino;
6535         int                     rc    = 0;
6536         ENTRY;
6537
6538         LASSERT(!is_remote_parent_ino(dev, obj->oo_inode->i_ino));
6539
6540         if (attr & LUDA_VERIFY) {
6541                 if (unlikely(is_remote_parent_ino(dev, ino))) {
6542                         attr |= LUDA_IGNORE;
6543                         /* If the parent is on remote MDT, and there
6544                          * is no FID-in-dirent, then we have to get
6545                          * the parent FID from the linkEA.  */
6546                         if (!fid_is_sane(fid) &&
6547                             it->oie_dirent->oied_namelen == 2 &&
6548                             it->oie_dirent->oied_name[0] == '.' &&
6549                             it->oie_dirent->oied_name[1] == '.')
6550                                 osd_get_pfid_from_linkea(env, obj, fid);
6551                 } else {
6552                         rc = osd_dirent_check_repair(env, obj, it, fid, id,
6553                                                      &attr);
6554                 }
6555
6556                 if (!fid_is_sane(fid))
6557                         attr |= LUDA_UNKNOWN;
6558         } else {
6559                 attr &= ~LU_DIRENT_ATTRS_MASK;
6560                 if (!fid_is_sane(fid)) {
6561                         bool is_dotdot = false;
6562                         if (it->oie_dirent->oied_namelen == 2 &&
6563                             it->oie_dirent->oied_name[0] == '.' &&
6564                             it->oie_dirent->oied_name[1] == '.')
6565                                 is_dotdot = true;
6566                         /* If the parent is on remote MDT, and there
6567                          * is no FID-in-dirent, then we have to get
6568                          * the parent FID from the linkEA.  */
6569                         if (is_remote_parent_ino(dev, ino) && is_dotdot) {
6570                                 rc = osd_get_pfid_from_linkea(env, obj, fid);
6571                         } else {
6572                                 if (is_dotdot == false &&
6573                                     OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP))
6574                                         RETURN(-ENOENT);
6575
6576                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
6577                         }
6578                 } else {
6579                         osd_id_gen(id, ino, OSD_OII_NOGEN);
6580                 }
6581         }
6582
6583         /* Pack the entry anyway, at least the offset is right. */
6584         osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
6585                            it->oie_dirent->oied_name,
6586                            it->oie_dirent->oied_namelen,
6587                            it->oie_dirent->oied_type, attr);
6588
6589         if (rc < 0)
6590                 RETURN(rc);
6591
6592         if (osd_remote_fid(env, dev, fid))
6593                 RETURN(0);
6594
6595         if (likely(!(attr & (LUDA_IGNORE | LUDA_UNKNOWN)) && rc == 0))
6596                 osd_add_oi_cache(oti, dev, id, fid);
6597
6598         RETURN(rc > 0 ? 0 : rc);
6599 }
6600
6601 /**
6602  * Returns the record size size at current position.
6603  *
6604  * This function will return record(lu_dirent) size in bytes.
6605  *
6606  * \param[in] env       execution environment
6607  * \param[in] di        iterator's in memory structure
6608  * \param[in] attr      attribute of the entry, only requires LUDA_TYPE to
6609  *                      calculate the lu_dirent size.
6610  *
6611  * \retval      record size(in bytes & in memory) of the current lu_dirent
6612  *              entry.
6613  */
6614 static int osd_it_ea_rec_size(const struct lu_env *env, const struct dt_it *di,
6615                               __u32 attr)
6616 {
6617         struct osd_it_ea *it = (struct osd_it_ea *)di;
6618
6619         return lu_dirent_calc_size(it->oie_dirent->oied_namelen, attr);
6620 }
6621
6622 /**
6623  * Returns a cookie for current position of the iterator head, so that
6624  * user can use this cookie to load/start the iterator next time.
6625  *
6626  * \param di iterator's in memory structure
6627  *
6628  * \retval cookie for current position, on success
6629  */
6630 static __u64 osd_it_ea_store(const struct lu_env *env, const struct dt_it *di)
6631 {
6632         struct osd_it_ea *it = (struct osd_it_ea *)di;
6633
6634         return it->oie_dirent->oied_off;
6635 }
6636
6637 /**
6638  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
6639  * to load a directory entry at a time and stored it i inn,
6640  * in iterator's in-memory data structure.
6641  *
6642  * \param di struct osd_it_ea, iterator's in memory structure
6643  *
6644  * \retval +ve on success
6645  * \retval -ve on error
6646  */
6647 static int osd_it_ea_load(const struct lu_env *env,
6648                           const struct dt_it *di, __u64 hash)
6649 {
6650         struct osd_it_ea *it = (struct osd_it_ea *)di;
6651         int rc;
6652
6653         ENTRY;
6654         it->oie_file.f_pos = hash;
6655
6656         rc =  osd_ldiskfs_it_fill(env, di);
6657         if (rc > 0)
6658                 rc = -ENODATA;
6659
6660         if (rc == 0)
6661                 rc = +1;
6662
6663         RETURN(rc);
6664 }
6665
6666 /**
6667  * Index lookup function for interoperability mode (b11826).
6668  *
6669  * \param key,  key i.e. file name to be searched
6670  *
6671  * \retval +ve, on success
6672  * \retval -ve, on error
6673  */
6674 static int osd_index_ea_lookup(const struct lu_env *env, struct dt_object *dt,
6675                                struct dt_rec *rec, const struct dt_key *key)
6676 {
6677         struct osd_object *obj = osd_dt_obj(dt);
6678         int rc = 0;
6679
6680         ENTRY;
6681
6682         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
6683         LINVRNT(osd_invariant(obj));
6684
6685         rc = osd_ea_lookup_rec(env, obj, rec, key);
6686         if (rc == 0)
6687                 rc = +1;
6688         RETURN(rc);
6689 }
6690
6691 /**
6692  * Index and Iterator operations for interoperability
6693  * mode (i.e. to run 2.0 mds on 1.8 disk) (b11826)
6694  */
6695 static const struct dt_index_operations osd_index_ea_ops = {
6696         .dio_lookup         = osd_index_ea_lookup,
6697         .dio_declare_insert = osd_index_declare_ea_insert,
6698         .dio_insert         = osd_index_ea_insert,
6699         .dio_declare_delete = osd_index_declare_ea_delete,
6700         .dio_delete         = osd_index_ea_delete,
6701         .dio_it     = {
6702                 .init     = osd_it_ea_init,
6703                 .fini     = osd_it_ea_fini,
6704                 .get      = osd_it_ea_get,
6705                 .put      = osd_it_ea_put,
6706                 .next     = osd_it_ea_next,
6707                 .key      = osd_it_ea_key,
6708                 .key_size = osd_it_ea_key_size,
6709                 .rec      = osd_it_ea_rec,
6710                 .rec_size = osd_it_ea_rec_size,
6711                 .store    = osd_it_ea_store,
6712                 .load     = osd_it_ea_load
6713         }
6714 };
6715
6716 static void *osd_key_init(const struct lu_context *ctx,
6717                           struct lu_context_key *key)
6718 {
6719         struct osd_thread_info *info;
6720
6721         OBD_ALLOC_PTR(info);
6722         if (info == NULL)
6723                 return ERR_PTR(-ENOMEM);
6724
6725         OBD_ALLOC(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
6726         if (info->oti_it_ea_buf == NULL)
6727                 goto out_free_info;
6728
6729         info->oti_env = container_of(ctx, struct lu_env, le_ctx);
6730
6731         info->oti_hlock = ldiskfs_htree_lock_alloc();
6732         if (info->oti_hlock == NULL)
6733                 goto out_free_ea;
6734
6735         return info;
6736
6737  out_free_ea:
6738         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
6739  out_free_info:
6740         OBD_FREE_PTR(info);
6741         return ERR_PTR(-ENOMEM);
6742 }
6743
6744 static void osd_key_fini(const struct lu_context *ctx,
6745                          struct lu_context_key *key, void* data)
6746 {
6747         struct osd_thread_info *info = data;
6748         struct ldiskfs_inode_info *lli = LDISKFS_I(info->oti_inode);
6749         struct osd_idmap_cache  *idc = info->oti_ins_cache;
6750
6751         if (info->oti_inode != NULL)
6752                 OBD_FREE_PTR(lli);
6753         if (info->oti_hlock != NULL)
6754                 ldiskfs_htree_lock_free(info->oti_hlock);
6755         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
6756         lu_buf_free(&info->oti_iobuf.dr_pg_buf);
6757         lu_buf_free(&info->oti_iobuf.dr_bl_buf);
6758         lu_buf_free(&info->oti_big_buf);
6759         if (idc != NULL) {
6760                 LASSERT(info->oti_ins_cache_size > 0);
6761                 OBD_FREE(idc, sizeof(*idc) * info->oti_ins_cache_size);
6762                 info->oti_ins_cache = NULL;
6763                 info->oti_ins_cache_size = 0;
6764         }
6765         OBD_FREE_PTR(info);
6766 }
6767
6768 static void osd_key_exit(const struct lu_context *ctx,
6769                          struct lu_context_key *key, void *data)
6770 {
6771         struct osd_thread_info *info = data;
6772
6773         LASSERT(info->oti_r_locks == 0);
6774         LASSERT(info->oti_w_locks == 0);
6775         LASSERT(info->oti_txns    == 0);
6776 }
6777
6778 /* type constructor/destructor: osd_type_init, osd_type_fini */
6779 LU_TYPE_INIT_FINI(osd, &osd_key);
6780
6781 struct lu_context_key osd_key = {
6782         .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL,
6783         .lct_init = osd_key_init,
6784         .lct_fini = osd_key_fini,
6785         .lct_exit = osd_key_exit
6786 };
6787
6788
6789 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
6790                            const char *name, struct lu_device *next)
6791 {
6792         struct osd_device *osd = osd_dev(d);
6793
6794         if (strlcpy(osd->od_svname, name, sizeof(osd->od_svname))
6795             >= sizeof(osd->od_svname))
6796                 return -E2BIG;
6797         return osd_procfs_init(osd, name);
6798 }
6799
6800 static int osd_fid_init(const struct lu_env *env, struct osd_device *osd)
6801 {
6802         struct seq_server_site  *ss = osd_seq_site(osd);
6803         int                     rc;
6804         ENTRY;
6805
6806         if (osd->od_is_ost || osd->od_cl_seq != NULL)
6807                 RETURN(0);
6808
6809         if (unlikely(ss == NULL))
6810                 RETURN(-ENODEV);
6811
6812         OBD_ALLOC_PTR(osd->od_cl_seq);
6813         if (osd->od_cl_seq == NULL)
6814                 RETURN(-ENOMEM);
6815
6816         rc = seq_client_init(osd->od_cl_seq, NULL, LUSTRE_SEQ_METADATA,
6817                              osd->od_svname, ss->ss_server_seq);
6818         if (rc != 0) {
6819                 OBD_FREE_PTR(osd->od_cl_seq);
6820                 osd->od_cl_seq = NULL;
6821                 RETURN(rc);
6822         }
6823
6824         if (ss->ss_node_id == 0) {
6825                 /* If the OSD on the sequence controller(MDT0), then allocate
6826                  * sequence here, otherwise allocate sequence after connected
6827                  * to MDT0 (see mdt_register_lwp_callback()). */
6828                 rc = seq_server_alloc_meta(osd->od_cl_seq->lcs_srv,
6829                                    &osd->od_cl_seq->lcs_space, env);
6830         }
6831
6832         RETURN(rc);
6833 }
6834
6835 static void osd_fid_fini(const struct lu_env *env, struct osd_device *osd)
6836 {
6837         if (osd->od_cl_seq == NULL)
6838                 return;
6839
6840         seq_client_fini(osd->od_cl_seq);
6841         OBD_FREE_PTR(osd->od_cl_seq);
6842         osd->od_cl_seq = NULL;
6843 }
6844
6845 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
6846 {
6847         ENTRY;
6848
6849         /* shutdown quota slave instance associated with the device */
6850         if (o->od_quota_slave != NULL) {
6851                 qsd_fini(env, o->od_quota_slave);
6852                 o->od_quota_slave = NULL;
6853         }
6854
6855         osd_fid_fini(env, o);
6856
6857         RETURN(0);
6858 }
6859
6860 static void osd_umount(const struct lu_env *env, struct osd_device *o)
6861 {
6862         ENTRY;
6863
6864         if (o->od_mnt != NULL) {
6865                 shrink_dcache_sb(osd_sb(o));
6866                 osd_sync(env, &o->od_dt_dev);
6867
6868                 mntput(o->od_mnt);
6869                 o->od_mnt = NULL;
6870         }
6871
6872         EXIT;
6873 }
6874
6875 static int osd_mount(const struct lu_env *env,
6876                      struct osd_device *o, struct lustre_cfg *cfg)
6877 {
6878         const char              *name  = lustre_cfg_string(cfg, 0);
6879         const char              *dev  = lustre_cfg_string(cfg, 1);
6880         const char              *opts;
6881         unsigned long            page, s_flags, lmd_flags = 0;
6882         struct page             *__page;
6883         struct file_system_type *type;
6884         char                    *options = NULL;
6885         char                    *str;
6886         struct osd_thread_info  *info = osd_oti_get(env);
6887         struct lu_fid           *fid = &info->oti_fid;
6888         struct inode            *inode;
6889         int                      rc = 0, force_over_512tb = 0;
6890         ENTRY;
6891
6892         if (o->od_mnt != NULL)
6893                 RETURN(0);
6894
6895         if (strlen(dev) >= sizeof(o->od_mntdev))
6896                 RETURN(-E2BIG);
6897         strcpy(o->od_mntdev, dev);
6898
6899         str = lustre_cfg_string(cfg, 2);
6900         s_flags = simple_strtoul(str, NULL, 0);
6901         str = strstr(str, ":");
6902         if (str)
6903                 lmd_flags = simple_strtoul(str + 1, NULL, 0);
6904         opts = lustre_cfg_string(cfg, 3);
6905 #ifdef __BIG_ENDIAN
6906         if (opts == NULL || strstr(opts, "bigendian_extents") == NULL) {
6907                 CERROR("%s: device %s extents feature is not guaranteed to "
6908                        "work on big-endian systems. Use \"bigendian_extents\" "
6909                        "mount option to override.\n", name, dev);
6910                 RETURN(-EINVAL);
6911         }
6912 #endif
6913 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
6914         if (opts != NULL && strstr(opts, "force_over_128tb") != NULL) {
6915                 CWARN("force_over_128tb option is deprecated. "
6916                       "Filesystems less than 512TB can be created without any "
6917                       "force options. Use force_over_512tb option for "
6918                       "filesystems greater than 512TB.\n");
6919         }
6920 #endif
6921 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 1, 53, 0)
6922         if (opts != NULL && strstr(opts, "force_over_256tb") != NULL) {
6923                 CWARN("force_over_256tb option is deprecated. "
6924                       "Filesystems less than 512TB can be created without any "
6925                       "force options. Use force_over_512tb option for "
6926                       "filesystems greater than 512TB.\n");
6927         }
6928 #endif
6929
6930         if (opts != NULL && strstr(opts, "force_over_512tb") != NULL)
6931                 force_over_512tb = 1;
6932
6933         __page = alloc_page(GFP_KERNEL);
6934         if (__page == NULL)
6935                 GOTO(out, rc = -ENOMEM);
6936         page = (unsigned long)page_address(__page);
6937         options = (char *)page;
6938         *options = '\0';
6939         if (opts != NULL) {
6940                 /* strip out the options for back compatiblity */
6941                 static char *sout[] = {
6942                         "mballoc",
6943                         "iopen",
6944                         "noiopen",
6945                         "iopen_nopriv",
6946                         "extents",
6947                         "noextents",
6948                         /* strip out option we processed in osd */
6949                         "bigendian_extents",
6950                         "force_over_128tb",
6951                         "force_over_256tb",
6952                         "force_over_512tb",
6953                         NULL
6954                 };
6955                 strcat(options, opts);
6956                 for (rc = 0, str = options; sout[rc]; ) {
6957                         char *op = strstr(str, sout[rc]);
6958                         if (op == NULL) {
6959                                 rc++;
6960                                 str = options;
6961                                 continue;
6962                         }
6963                         if (op == options || *(op - 1) == ',') {
6964                                 str = op + strlen(sout[rc]);
6965                                 if (*str == ',' || *str == '\0') {
6966                                         *str == ',' ? str++ : str;
6967                                         memmove(op, str, strlen(str) + 1);
6968                                 }
6969                         }
6970                         for (str = op; *str != ',' && *str != '\0'; str++)
6971                                 ;
6972                 }
6973         } else {
6974                 strncat(options, "user_xattr,acl", 14);
6975         }
6976
6977         /* Glom up mount options */
6978         if (*options != '\0')
6979                 strcat(options, ",");
6980         strlcat(options, "no_mbcache,nodelalloc", PAGE_SIZE);
6981
6982         type = get_fs_type("ldiskfs");
6983         if (!type) {
6984                 CERROR("%s: cannot find ldiskfs module\n", name);
6985                 GOTO(out, rc = -ENODEV);
6986         }
6987
6988         o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
6989         module_put(type->owner);
6990
6991         if (IS_ERR(o->od_mnt)) {
6992                 rc = PTR_ERR(o->od_mnt);
6993                 o->od_mnt = NULL;
6994                 CERROR("%s: can't mount %s: %d\n", name, dev, rc);
6995                 GOTO(out, rc);
6996         }
6997
6998         if (ldiskfs_blocks_count(LDISKFS_SB(osd_sb(o))->s_es) <<
6999                                  osd_sb(o)->s_blocksize_bits > 512ULL << 40 &&
7000                                  force_over_512tb == 0) {
7001                 CERROR("%s: device %s LDISKFS does not support filesystems "
7002                        "greater than 512TB and can cause data corruption. "
7003                        "Use \"force_over_512tb\" mount option to override.\n",
7004                        name, dev);
7005                 GOTO(out_mnt, rc = -EINVAL);
7006         }
7007
7008         if (lmd_flags & LMD_FLG_DEV_RDONLY) {
7009                 if (priv_dev_set_rdonly) {
7010                         priv_dev_set_rdonly(osd_sb(o)->s_bdev);
7011                         o->od_dt_dev.dd_rdonly = 1;
7012                         LCONSOLE_WARN("%s: set dev_rdonly on this device\n",
7013                                       name);
7014                 } else {
7015                         LCONSOLE_WARN("%s: not support dev_rdonly on this device",
7016                                       name);
7017
7018                         GOTO(out_mnt, rc = -EOPNOTSUPP);
7019                 }
7020         } else if (priv_dev_check_rdonly &&
7021                    priv_dev_check_rdonly(osd_sb(o)->s_bdev)) {
7022                 CERROR("%s: underlying device %s is marked as "
7023                        "read-only. Setup failed\n", name, dev);
7024
7025                 GOTO(out_mnt, rc = -EROFS);
7026         }
7027
7028         if (!LDISKFS_HAS_COMPAT_FEATURE(o->od_mnt->mnt_sb,
7029                                         LDISKFS_FEATURE_COMPAT_HAS_JOURNAL)) {
7030                 CERROR("%s: device %s is mounted w/o journal\n", name, dev);
7031                 GOTO(out_mnt, rc = -EINVAL);
7032         }
7033
7034 #ifdef LDISKFS_MOUNT_DIRDATA
7035         if (LDISKFS_HAS_INCOMPAT_FEATURE(o->od_mnt->mnt_sb,
7036                                          LDISKFS_FEATURE_INCOMPAT_DIRDATA))
7037                 LDISKFS_SB(osd_sb(o))->s_mount_opt |= LDISKFS_MOUNT_DIRDATA;
7038         else if (strstr(name, "MDT")) /* don't complain for MGT or OSTs */
7039                 CWARN("%s: device %s was upgraded from Lustre-1.x without "
7040                       "enabling the dirdata feature. If you do not want to "
7041                       "downgrade to Lustre-1.x again, you can enable it via "
7042                       "'tune2fs -O dirdata device'\n", name, dev);
7043 #endif
7044         inode = osd_sb(o)->s_root->d_inode;
7045         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
7046         rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
7047         if (rc != 0) {
7048                 CERROR("%s: failed to set lma on %s root inode\n", name, dev);
7049                 GOTO(out_mnt, rc);
7050         }
7051
7052         if (lmd_flags & LMD_FLG_NOSCRUB)
7053                 o->od_noscrub = 1;
7054
7055         GOTO(out, rc = 0);
7056
7057 out_mnt:
7058         mntput(o->od_mnt);
7059         o->od_mnt = NULL;
7060
7061 out:
7062         if (__page)
7063                 __free_page(__page);
7064
7065         return rc;
7066 }
7067
7068 static struct lu_device *osd_device_fini(const struct lu_env *env,
7069                                          struct lu_device *d)
7070 {
7071         struct osd_device *o = osd_dev(d);
7072         ENTRY;
7073
7074         osd_shutdown(env, o);
7075         osd_procfs_fini(o);
7076         osd_scrub_cleanup(env, o);
7077         osd_obj_map_fini(o);
7078         osd_umount(env, o);
7079
7080         RETURN(NULL);
7081 }
7082
7083 static int osd_device_init0(const struct lu_env *env,
7084                             struct osd_device *o,
7085                             struct lustre_cfg *cfg)
7086 {
7087         struct lu_device        *l = osd2lu_dev(o);
7088         struct osd_thread_info *info;
7089         int                     rc;
7090         int                     cplen = 0;
7091
7092         /* if the module was re-loaded, env can loose its keys */
7093         rc = lu_env_refill((struct lu_env *) env);
7094         if (rc)
7095                 GOTO(out, rc);
7096         info = osd_oti_get(env);
7097         LASSERT(info);
7098
7099         l->ld_ops = &osd_lu_ops;
7100         o->od_dt_dev.dd_ops = &osd_dt_ops;
7101
7102         spin_lock_init(&o->od_osfs_lock);
7103         mutex_init(&o->od_otable_mutex);
7104         INIT_LIST_HEAD(&o->od_orphan_list);
7105
7106         o->od_read_cache = 1;
7107         o->od_writethrough_cache = 1;
7108         o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
7109
7110         cplen = strlcpy(o->od_svname, lustre_cfg_string(cfg, 4),
7111                         sizeof(o->od_svname));
7112         if (cplen >= sizeof(o->od_svname)) {
7113                 rc = -E2BIG;
7114                 GOTO(out, rc);
7115         }
7116
7117         o->od_index = -1; /* -1 means index is invalid */
7118         rc = server_name2index(o->od_svname, &o->od_index, NULL);
7119         if (rc == LDD_F_SV_TYPE_OST)
7120                 o->od_is_ost = 1;
7121
7122         o->od_full_scrub_ratio = OFSR_DEFAULT;
7123         o->od_full_scrub_threshold_rate = FULL_SCRUB_THRESHOLD_RATE_DEFAULT;
7124         rc = osd_mount(env, o, cfg);
7125         if (rc != 0)
7126                 GOTO(out, rc);
7127
7128         rc = osd_obj_map_init(env, o);
7129         if (rc != 0)
7130                 GOTO(out_mnt, rc);
7131
7132         rc = lu_site_init(&o->od_site, l);
7133         if (rc != 0)
7134                 GOTO(out_compat, rc);
7135         o->od_site.ls_bottom_dev = l;
7136
7137         rc = lu_site_init_finish(&o->od_site);
7138         if (rc != 0)
7139                 GOTO(out_site, rc);
7140
7141         INIT_LIST_HEAD(&o->od_ios_list);
7142         /* setup scrub, including OI files initialization */
7143         rc = osd_scrub_setup(env, o);
7144         if (rc < 0)
7145                 GOTO(out_site, rc);
7146
7147         rc = osd_procfs_init(o, o->od_svname);
7148         if (rc != 0) {
7149                 CERROR("%s: can't initialize procfs: rc = %d\n",
7150                        o->od_svname, rc);
7151                 GOTO(out_scrub, rc);
7152         }
7153
7154         LASSERT(l->ld_site->ls_linkage.next != NULL);
7155         LASSERT(l->ld_site->ls_linkage.prev != NULL);
7156
7157         /* initialize quota slave instance */
7158         o->od_quota_slave = qsd_init(env, o->od_svname, &o->od_dt_dev,
7159                                      o->od_proc_entry);
7160         if (IS_ERR(o->od_quota_slave)) {
7161                 rc = PTR_ERR(o->od_quota_slave);
7162                 o->od_quota_slave = NULL;
7163                 GOTO(out_procfs, rc);
7164         }
7165
7166         RETURN(0);
7167
7168 out_procfs:
7169         osd_procfs_fini(o);
7170 out_scrub:
7171         osd_scrub_cleanup(env, o);
7172 out_site:
7173         lu_site_fini(&o->od_site);
7174 out_compat:
7175         osd_obj_map_fini(o);
7176 out_mnt:
7177         osd_umount(env, o);
7178 out:
7179         return rc;
7180 }
7181
7182 static struct lu_device *osd_device_alloc(const struct lu_env *env,
7183                                           struct lu_device_type *t,
7184                                           struct lustre_cfg *cfg)
7185 {
7186         struct osd_device *o;
7187         int                rc;
7188
7189         OBD_ALLOC_PTR(o);
7190         if (o == NULL)
7191                 return ERR_PTR(-ENOMEM);
7192
7193         rc = dt_device_init(&o->od_dt_dev, t);
7194         if (rc == 0) {
7195                 /* Because the ctx might be revived in dt_device_init,
7196                  * refill the env here */
7197                 lu_env_refill((struct lu_env *)env);
7198                 rc = osd_device_init0(env, o, cfg);
7199                 if (rc)
7200                         dt_device_fini(&o->od_dt_dev);
7201         }
7202
7203         if (unlikely(rc != 0))
7204                 OBD_FREE_PTR(o);
7205
7206         return rc == 0 ? osd2lu_dev(o) : ERR_PTR(rc);
7207 }
7208
7209 static struct lu_device *osd_device_free(const struct lu_env *env,
7210                                          struct lu_device *d)
7211 {
7212         struct osd_device *o = osd_dev(d);
7213         ENTRY;
7214
7215         /* XXX: make osd top device in order to release reference */
7216         d->ld_site->ls_top_dev = d;
7217         lu_site_purge(env, d->ld_site, -1);
7218         if (!cfs_hash_is_empty(d->ld_site->ls_obj_hash)) {
7219                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
7220                 lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
7221         }
7222         lu_site_fini(&o->od_site);
7223         dt_device_fini(&o->od_dt_dev);
7224         OBD_FREE_PTR(o);
7225         RETURN(NULL);
7226 }
7227
7228 static int osd_process_config(const struct lu_env *env,
7229                               struct lu_device *d, struct lustre_cfg *cfg)
7230 {
7231         struct osd_device               *o = osd_dev(d);
7232         int                             rc;
7233         ENTRY;
7234
7235         switch (cfg->lcfg_command) {
7236         case LCFG_SETUP:
7237                 rc = osd_mount(env, o, cfg);
7238                 break;
7239         case LCFG_CLEANUP:
7240                 lu_dev_del_linkage(d->ld_site, d);
7241                 rc = osd_shutdown(env, o);
7242                 break;
7243         case LCFG_PARAM:
7244                 LASSERT(&o->od_dt_dev);
7245                 rc = class_process_proc_param(PARAM_OSD, lprocfs_osd_obd_vars,
7246                                               cfg, &o->od_dt_dev);
7247                 if (rc > 0 || rc == -ENOSYS) {
7248                         rc = class_process_proc_param(PARAM_OST,
7249                                                       lprocfs_osd_obd_vars,
7250                                                       cfg, &o->od_dt_dev);
7251                         if (rc > 0)
7252                                 rc = 0;
7253                 }
7254                 break;
7255         default:
7256                 rc = -ENOSYS;
7257         }
7258
7259         RETURN(rc);
7260 }
7261
7262 static int osd_recovery_complete(const struct lu_env *env,
7263                                  struct lu_device *d)
7264 {
7265         struct osd_device       *osd = osd_dev(d);
7266         int                      rc = 0;
7267         ENTRY;
7268
7269         if (osd->od_quota_slave == NULL)
7270                 RETURN(0);
7271
7272         /* start qsd instance on recovery completion, this notifies the quota
7273          * slave code that we are about to process new requests now */
7274         rc = qsd_start(env, osd->od_quota_slave);
7275         RETURN(rc);
7276 }
7277
7278 /*
7279  * we use exports to track all osd users
7280  */
7281 static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
7282                            struct obd_device *obd, struct obd_uuid *cluuid,
7283                            struct obd_connect_data *data, void *localdata)
7284 {
7285         struct osd_device    *osd = osd_dev(obd->obd_lu_dev);
7286         struct lustre_handle  conn;
7287         int                   rc;
7288         ENTRY;
7289
7290         CDEBUG(D_CONFIG, "connect #%d\n", osd->od_connects);
7291
7292         rc = class_connect(&conn, obd, cluuid);
7293         if (rc)
7294                 RETURN(rc);
7295
7296         *exp = class_conn2export(&conn);
7297
7298         spin_lock(&osd->od_osfs_lock);
7299         osd->od_connects++;
7300         spin_unlock(&osd->od_osfs_lock);
7301
7302         RETURN(0);
7303 }
7304
7305 /*
7306  * once last export (we don't count self-export) disappeared
7307  * osd can be released
7308  */
7309 static int osd_obd_disconnect(struct obd_export *exp)
7310 {
7311         struct obd_device *obd = exp->exp_obd;
7312         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
7313         int                rc, release = 0;
7314         ENTRY;
7315
7316         /* Only disconnect the underlying layers on the final disconnect. */
7317         spin_lock(&osd->od_osfs_lock);
7318         osd->od_connects--;
7319         if (osd->od_connects == 0)
7320                 release = 1;
7321         spin_unlock(&osd->od_osfs_lock);
7322
7323         rc = class_disconnect(exp); /* bz 9811 */
7324
7325         if (rc == 0 && release)
7326                 class_manual_cleanup(obd);
7327         RETURN(rc);
7328 }
7329
7330 static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
7331                        struct lu_device *dev)
7332 {
7333         struct osd_device       *osd    = osd_dev(dev);
7334         struct lr_server_data   *lsd    =
7335                         &osd->od_dt_dev.dd_lu_dev.ld_site->ls_tgt->lut_lsd;
7336         int                      result = 0;
7337         ENTRY;
7338
7339         if (osd->od_quota_slave != NULL) {
7340                 /* set up quota slave objects */
7341                 result = qsd_prepare(env, osd->od_quota_slave);
7342                 if (result != 0)
7343                         RETURN(result);
7344         }
7345
7346         if (lsd->lsd_feature_incompat & OBD_COMPAT_OST) {
7347 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 52, 0)
7348                 if (lsd->lsd_feature_rocompat & OBD_ROCOMPAT_IDX_IN_IDIF) {
7349                         osd->od_index_in_idif = 1;
7350                 } else {
7351                         osd->od_index_in_idif = 0;
7352                         result = osd_register_proc_index_in_idif(osd);
7353                         if (result != 0)
7354                                 RETURN(result);
7355                 }
7356 #else
7357                 osd->od_index_in_idif = 1;
7358 #endif
7359         }
7360
7361         result = osd_fid_init(env, osd);
7362
7363         RETURN(result);
7364 }
7365
7366 static int osd_fid_alloc(const struct lu_env *env, struct obd_export *exp,
7367                          struct lu_fid *fid, struct md_op_data *op_data)
7368 {
7369         struct osd_device *osd = osd_dev(exp->exp_obd->obd_lu_dev);
7370
7371         return seq_client_alloc_fid(env, osd->od_cl_seq, fid);
7372 }
7373
7374 static const struct lu_object_operations osd_lu_obj_ops = {
7375         .loo_object_init      = osd_object_init,
7376         .loo_object_delete    = osd_object_delete,
7377         .loo_object_release   = osd_object_release,
7378         .loo_object_free      = osd_object_free,
7379         .loo_object_print     = osd_object_print,
7380         .loo_object_invariant = osd_object_invariant
7381 };
7382
7383 const struct lu_device_operations osd_lu_ops = {
7384         .ldo_object_alloc      = osd_object_alloc,
7385         .ldo_process_config    = osd_process_config,
7386         .ldo_recovery_complete = osd_recovery_complete,
7387         .ldo_prepare           = osd_prepare,
7388 };
7389
7390 static const struct lu_device_type_operations osd_device_type_ops = {
7391         .ldto_init = osd_type_init,
7392         .ldto_fini = osd_type_fini,
7393
7394         .ldto_start = osd_type_start,
7395         .ldto_stop  = osd_type_stop,
7396
7397         .ldto_device_alloc = osd_device_alloc,
7398         .ldto_device_free  = osd_device_free,
7399
7400         .ldto_device_init    = osd_device_init,
7401         .ldto_device_fini    = osd_device_fini
7402 };
7403
7404 static struct lu_device_type osd_device_type = {
7405         .ldt_tags     = LU_DEVICE_DT,
7406         .ldt_name     = LUSTRE_OSD_LDISKFS_NAME,
7407         .ldt_ops      = &osd_device_type_ops,
7408         .ldt_ctx_tags = LCT_LOCAL,
7409 };
7410
7411 static int osd_health_check(const struct lu_env *env, struct obd_device *obd)
7412 {
7413         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
7414         struct super_block *sb = osd_sb(osd);
7415
7416         return (osd->od_mnt == NULL || sb->s_flags & MS_RDONLY);
7417 }
7418
7419 /*
7420  * lprocfs legacy support.
7421  */
7422 static struct obd_ops osd_obd_device_ops = {
7423         .o_owner = THIS_MODULE,
7424         .o_connect      = osd_obd_connect,
7425         .o_disconnect   = osd_obd_disconnect,
7426         .o_fid_alloc    = osd_fid_alloc,
7427         .o_health_check = osd_health_check,
7428 };
7429
7430 static int __init osd_init(void)
7431 {
7432         int rc;
7433
7434         LASSERT(BH_DXLock < sizeof(((struct buffer_head *)0)->b_state) * 8);
7435 #if !defined(CONFIG_DEBUG_MUTEXES) && !defined(CONFIG_DEBUG_SPINLOCK)
7436         /* please, try to keep osd_thread_info smaller than a page */
7437         CLASSERT(sizeof(struct osd_thread_info) <= PAGE_SIZE);
7438 #endif
7439
7440         osd_oi_mod_init();
7441
7442         rc = lu_kmem_init(ldiskfs_caches);
7443         if (rc)
7444                 return rc;
7445
7446 #ifdef CONFIG_KALLSYMS
7447         priv_dev_set_rdonly = (void *)kallsyms_lookup_name("dev_set_rdonly");
7448         priv_dev_check_rdonly = (void *)kallsyms_lookup_name("dev_check_rdonly");
7449         /* Clear readonly is unused at this time */
7450         /*priv_dev_clear_rdonly = (void *)kallsyms_lookup_name("dev_clear_rdonly");*/
7451 #endif
7452
7453         rc = class_register_type(&osd_obd_device_ops, NULL, true,
7454                                  lprocfs_osd_module_vars,
7455                                  LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
7456         if (rc)
7457                 lu_kmem_fini(ldiskfs_caches);
7458         return rc;
7459 }
7460
7461 static void __exit osd_exit(void)
7462 {
7463         class_unregister_type(LUSTRE_OSD_LDISKFS_NAME);
7464         lu_kmem_fini(ldiskfs_caches);
7465 }
7466
7467 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
7468 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_LDISKFS_NAME")");
7469 MODULE_VERSION(LUSTRE_VERSION_STRING);
7470 MODULE_LICENSE("GPL");
7471
7472 module_init(osd_init);
7473 module_exit(osd_exit);