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[fs/lustre-release.git] / lustre / osd / osd_handler.c
1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=8:tabstop=8:
3  *
4  * GPL HEADER START
5  *
6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 only,
10  * as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License version 2 for more details (a copy is included
16  * in the LICENSE file that accompanied this code).
17  *
18  * You should have received a copy of the GNU General Public License
19  * version 2 along with this program; If not, see
20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
21  *
22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23  * CA 95054 USA or visit www.sun.com if you need additional information or
24  * have any questions.
25  *
26  * GPL HEADER END
27  */
28 /*
29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
30  * Use is subject to license terms.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  *
36  * lustre/osd/osd_handler.c
37  *
38  * Top-level entry points into osd module
39  *
40  * Author: Nikita Danilov <nikita@clusterfs.com>
41  */
42
43 #ifndef EXPORT_SYMTAB
44 # define EXPORT_SYMTAB
45 #endif
46 #define DEBUG_SUBSYSTEM S_MDS
47
48 #include <linux/module.h>
49
50 /* LUSTRE_VERSION_CODE */
51 #include <lustre_ver.h>
52 /* prerequisite for linux/xattr.h */
53 #include <linux/types.h>
54 /* prerequisite for linux/xattr.h */
55 #include <linux/fs.h>
56 /* XATTR_{REPLACE,CREATE} */
57 #include <linux/xattr.h>
58 /* simple_mkdir() */
59 #include <lvfs.h>
60
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
69 /* fid_is_local() */
70 #include <lustre_fid.h>
71
72 #include "osd_internal.h"
73 #include "osd_igif.h"
74
75 /* llo_* api support */
76 #include <md_object.h>
77
78 static const char dot[] = ".";
79 static const char dotdot[] = "..";
80 static const char remote_obj_dir[] = "REM_OBJ_DIR";
81
82 struct osd_directory {
83         struct iam_container od_container;
84         struct iam_descr     od_descr;
85 };
86
87 struct osd_object {
88         struct dt_object       oo_dt;
89         /**
90          * Inode for file system object represented by this osd_object. This
91          * inode is pinned for the whole duration of lu_object life.
92          *
93          * Not modified concurrently (either setup early during object
94          * creation, or assigned by osd_object_create() under write lock).
95          */
96         struct inode          *oo_inode;
97         /**
98          * to protect index ops.
99          */
100         cfs_rw_semaphore_t     oo_ext_idx_sem;
101         cfs_rw_semaphore_t     oo_sem;
102         struct osd_directory  *oo_dir;
103         /** protects inode attributes. */
104         cfs_spinlock_t         oo_guard;
105         /**
106          * Following two members are used to indicate the presence of dot and
107          * dotdot in the given directory. This is required for interop mode
108          * (b11826).
109          */
110         int                    oo_compat_dot_created;
111         int                    oo_compat_dotdot_created;
112
113         const struct lu_env   *oo_owner;
114 #ifdef CONFIG_LOCKDEP
115         struct lockdep_map     oo_dep_map;
116 #endif
117 };
118
119 static const struct lu_object_operations      osd_lu_obj_ops;
120 static const struct lu_device_operations      osd_lu_ops;
121 static       struct lu_context_key            osd_key;
122 static const struct dt_object_operations      osd_obj_ops;
123 static const struct dt_object_operations      osd_obj_ea_ops;
124 static const struct dt_body_operations        osd_body_ops;
125 static const struct dt_index_operations       osd_index_iam_ops;
126 static const struct dt_index_operations       osd_index_ea_ops;
127
128 struct osd_thandle {
129         struct thandle          ot_super;
130         handle_t               *ot_handle;
131         struct journal_callback ot_jcb;
132         /* Link to the device, for debugging. */
133         struct lu_ref_link     *ot_dev_link;
134
135 };
136
137 /*
138  * Helpers.
139  */
140 static int lu_device_is_osd(const struct lu_device *d)
141 {
142         return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &osd_lu_ops);
143 }
144
145 static struct osd_device *osd_dt_dev(const struct dt_device *d)
146 {
147         LASSERT(lu_device_is_osd(&d->dd_lu_dev));
148         return container_of0(d, struct osd_device, od_dt_dev);
149 }
150
151 static struct osd_device *osd_dev(const struct lu_device *d)
152 {
153         LASSERT(lu_device_is_osd(d));
154         return osd_dt_dev(container_of0(d, struct dt_device, dd_lu_dev));
155 }
156
157 static struct osd_device *osd_obj2dev(const struct osd_object *o)
158 {
159         return osd_dev(o->oo_dt.do_lu.lo_dev);
160 }
161
162 static struct super_block *osd_sb(const struct osd_device *dev)
163 {
164         return dev->od_mount->lmi_mnt->mnt_sb;
165 }
166
167 static int osd_object_is_root(const struct osd_object *obj)
168 {
169         return osd_sb(osd_obj2dev(obj))->s_root->d_inode == obj->oo_inode;
170 }
171
172 static struct osd_object *osd_obj(const struct lu_object *o)
173 {
174         LASSERT(lu_device_is_osd(o->lo_dev));
175         return container_of0(o, struct osd_object, oo_dt.do_lu);
176 }
177
178 static struct osd_object *osd_dt_obj(const struct dt_object *d)
179 {
180         return osd_obj(&d->do_lu);
181 }
182
183 static struct lu_device *osd2lu_dev(struct osd_device *osd)
184 {
185         return &osd->od_dt_dev.dd_lu_dev;
186 }
187
188 static journal_t *osd_journal(const struct osd_device *dev)
189 {
190         return LDISKFS_SB(osd_sb(dev))->s_journal;
191 }
192
193 static int osd_has_index(const struct osd_object *obj)
194 {
195         return obj->oo_dt.do_index_ops != NULL;
196 }
197
198 static int osd_object_invariant(const struct lu_object *l)
199 {
200         return osd_invariant(osd_obj(l));
201 }
202
203 #ifdef HAVE_QUOTA_SUPPORT
204 static inline void
205 osd_push_ctxt(const struct lu_env *env, struct osd_ctxt *save)
206 {
207         struct md_ucred    *uc = md_ucred(env);
208
209         LASSERT(uc != NULL);
210
211         save->oc_uid = current->fsuid;
212         save->oc_gid = current->fsgid;
213         save->oc_cap = current->cap_effective;
214         current->fsuid         = uc->mu_fsuid;
215         current->fsgid         = uc->mu_fsgid;
216         current->cap_effective = uc->mu_cap;
217 }
218
219 static inline void
220 osd_pop_ctxt(struct osd_ctxt *save)
221 {
222         current->fsuid         = save->oc_uid;
223         current->fsgid         = save->oc_gid;
224         current->cap_effective = save->oc_cap;
225 }
226 #endif
227
228 static inline struct osd_thread_info *osd_oti_get(const struct lu_env *env)
229 {
230         return lu_context_key_get(&env->le_ctx, &osd_key);
231 }
232
233 /*
234  * Concurrency: doesn't matter
235  */
236 static int osd_read_locked(const struct lu_env *env, struct osd_object *o)
237 {
238         return osd_oti_get(env)->oti_r_locks > 0;
239 }
240
241 /*
242  * Concurrency: doesn't matter
243  */
244 static int osd_write_locked(const struct lu_env *env, struct osd_object *o)
245 {
246         struct osd_thread_info *oti = osd_oti_get(env);
247         return oti->oti_w_locks > 0 && o->oo_owner == env;
248 }
249
250 /*
251  * Concurrency: doesn't access mutable data
252  */
253 static int osd_root_get(const struct lu_env *env,
254                         struct dt_device *dev, struct lu_fid *f)
255 {
256         struct inode *inode;
257
258         inode = osd_sb(osd_dt_dev(dev))->s_root->d_inode;
259         lu_igif_build(f, inode->i_ino, inode->i_generation);
260         return 0;
261 }
262
263 /*
264  * OSD object methods.
265  */
266
267 /*
268  * Concurrency: no concurrent access is possible that early in object
269  * life-cycle.
270  */
271 static struct lu_object *osd_object_alloc(const struct lu_env *env,
272                                           const struct lu_object_header *hdr,
273                                           struct lu_device *d)
274 {
275         struct osd_object *mo;
276
277         OBD_ALLOC_PTR(mo);
278         if (mo != NULL) {
279                 struct lu_object *l;
280
281                 l = &mo->oo_dt.do_lu;
282                 dt_object_init(&mo->oo_dt, NULL, d);
283                 if (osd_dev(d)->od_iop_mode)
284                         mo->oo_dt.do_ops = &osd_obj_ea_ops;
285                 else
286                         mo->oo_dt.do_ops = &osd_obj_ops;
287
288                 l->lo_ops = &osd_lu_obj_ops;
289                 cfs_init_rwsem(&mo->oo_sem);
290                 cfs_init_rwsem(&mo->oo_ext_idx_sem);
291                 cfs_spin_lock_init(&mo->oo_guard);
292                 return l;
293         } else
294                 return NULL;
295 }
296
297 /*
298  * retrieve object from backend ext fs.
299  **/
300 static struct inode *osd_iget(struct osd_thread_info *info,
301                               struct osd_device *dev,
302                               const struct osd_inode_id *id)
303 {
304         struct inode *inode = NULL;
305
306 #ifdef HAVE_EXT4_LDISKFS
307         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
308         if (IS_ERR(inode))
309         /* Newer kernels return an error instead of a NULL pointer */
310                 inode = NULL;
311 #else
312         inode = iget(osd_sb(dev), id->oii_ino);
313 #endif
314         if (inode == NULL) {
315                 CERROR("no inode\n");
316                 inode = ERR_PTR(-EACCES);
317         } else if (id->oii_gen != OSD_OII_NOGEN &&
318                    inode->i_generation != id->oii_gen) {
319                 iput(inode);
320                 inode = ERR_PTR(-ESTALE);
321         } else if (inode->i_nlink == 0) {
322                 /* due to parallel readdir and unlink,
323                 * we can have dead inode here. */
324                 CWARN("stale inode\n");
325                 make_bad_inode(inode);
326                 iput(inode);
327                 inode = ERR_PTR(-ESTALE);
328         } else if (is_bad_inode(inode)) {
329                 CERROR("bad inode %lx\n",inode->i_ino);
330                 iput(inode);
331                 inode = ERR_PTR(-ENOENT);
332         }
333         return inode;
334 }
335
336 static int osd_fid_lookup(const struct lu_env *env,
337                           struct osd_object *obj, const struct lu_fid *fid)
338 {
339         struct osd_thread_info *info;
340         struct lu_device       *ldev = obj->oo_dt.do_lu.lo_dev;
341         struct osd_device      *dev;
342         struct osd_inode_id    *id;
343         struct osd_oi          *oi;
344         struct inode           *inode;
345         int                     result;
346
347         LINVRNT(osd_invariant(obj));
348         LASSERT(obj->oo_inode == NULL);
349         LASSERT(fid_is_sane(fid));
350         /*
351          * This assertion checks that osd layer sees only local
352          * fids. Unfortunately it is somewhat expensive (does a
353          * cache-lookup). Disabling it for production/acceptance-testing.
354          */
355         LASSERT(1 || fid_is_local(env, ldev->ld_site, fid));
356
357         ENTRY;
358
359         info = osd_oti_get(env);
360         dev  = osd_dev(ldev);
361         id   = &info->oti_id;
362         oi   = &dev->od_oi;
363
364         if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
365                 RETURN(-ENOENT);
366
367         result = osd_oi_lookup(info, oi, fid, id);
368         if (result == 0) {
369                 inode = osd_iget(info, dev, id);
370                 if (!IS_ERR(inode)) {
371                         obj->oo_inode = inode;
372                         LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
373                         if (dev->od_iop_mode) {
374                                 obj->oo_compat_dot_created = 1;
375                                 obj->oo_compat_dotdot_created = 1;
376                         }
377                         result = 0;
378                 } else
379                         /*
380                          * If fid wasn't found in oi, inode-less object is
381                          * created, for which lu_object_exists() returns
382                          * false. This is used in a (frequent) case when
383                          * objects are created as locking anchors or
384                          * place holders for objects yet to be created.
385                          */
386                         result = PTR_ERR(inode);
387         } else if (result == -ENOENT)
388                 result = 0;
389         LINVRNT(osd_invariant(obj));
390
391         RETURN(result);
392 }
393
394 /*
395  * Concurrency: shouldn't matter.
396  */
397 static void osd_object_init0(struct osd_object *obj)
398 {
399         LASSERT(obj->oo_inode != NULL);
400         obj->oo_dt.do_body_ops = &osd_body_ops;
401         obj->oo_dt.do_lu.lo_header->loh_attr |=
402                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
403 }
404
405 /*
406  * Concurrency: no concurrent access is possible that early in object
407  * life-cycle.
408  */
409 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
410                            const struct lu_object_conf *unused)
411 {
412         struct osd_object *obj = osd_obj(l);
413         int result;
414
415         LINVRNT(osd_invariant(obj));
416
417         result = osd_fid_lookup(env, obj, lu_object_fid(l));
418         if (result == 0) {
419                 if (obj->oo_inode != NULL)
420                         osd_object_init0(obj);
421         }
422         LINVRNT(osd_invariant(obj));
423         return result;
424 }
425
426 /*
427  * Concurrency: no concurrent access is possible that late in object
428  * life-cycle.
429  */
430 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
431 {
432         struct osd_object *obj = osd_obj(l);
433
434         LINVRNT(osd_invariant(obj));
435
436         dt_object_fini(&obj->oo_dt);
437         OBD_FREE_PTR(obj);
438 }
439
440 /**
441  * IAM Iterator
442  */
443 static struct iam_path_descr *osd_it_ipd_get(const struct lu_env *env,
444                                              const struct iam_container *bag)
445 {
446         return bag->ic_descr->id_ops->id_ipd_alloc(bag,
447                                            osd_oti_get(env)->oti_it_ipd);
448 }
449
450 static struct iam_path_descr *osd_idx_ipd_get(const struct lu_env *env,
451                                               const struct iam_container *bag)
452 {
453         return bag->ic_descr->id_ops->id_ipd_alloc(bag,
454                                            osd_oti_get(env)->oti_idx_ipd);
455 }
456
457 static void osd_ipd_put(const struct lu_env *env,
458                         const struct iam_container *bag,
459                         struct iam_path_descr *ipd)
460 {
461         bag->ic_descr->id_ops->id_ipd_free(ipd);
462 }
463
464 /*
465  * Concurrency: no concurrent access is possible that late in object
466  * life-cycle.
467  */
468 static void osd_index_fini(struct osd_object *o)
469 {
470         struct iam_container *bag;
471
472         if (o->oo_dir != NULL) {
473                 bag = &o->oo_dir->od_container;
474                 if (o->oo_inode != NULL) {
475                         if (bag->ic_object == o->oo_inode)
476                                 iam_container_fini(bag);
477                 }
478                 OBD_FREE_PTR(o->oo_dir);
479                 o->oo_dir = NULL;
480         }
481 }
482
483 /*
484  * Concurrency: no concurrent access is possible that late in object
485  * life-cycle (for all existing callers, that is. New callers have to provide
486  * their own locking.)
487  */
488 static int osd_inode_unlinked(const struct inode *inode)
489 {
490         return inode->i_nlink == 0;
491 }
492
493 enum {
494         OSD_TXN_OI_DELETE_CREDITS    = 20,
495         OSD_TXN_INODE_DELETE_CREDITS = 20
496 };
497
498 /*
499  * Journal
500  */
501
502 /*
503  * Concurrency: doesn't access mutable data.
504  */
505 static int osd_param_is_sane(const struct osd_device *dev,
506                              const struct txn_param *param)
507 {
508         return param->tp_credits <= osd_journal(dev)->j_max_transaction_buffers;
509 }
510
511 /*
512  * Concurrency: shouldn't matter.
513  */
514 static void osd_trans_commit_cb(struct journal_callback *jcb, int error)
515 {
516         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
517         struct thandle     *th  = &oh->ot_super;
518         struct dt_device   *dev = th->th_dev;
519         struct lu_device   *lud = &dev->dd_lu_dev;
520
521         LASSERT(dev != NULL);
522         LASSERT(oh->ot_handle == NULL);
523
524         if (error) {
525                 CERROR("transaction @0x%p commit error: %d\n", th, error);
526         } else {
527                 struct lu_env *env = &osd_dt_dev(dev)->od_env_for_commit;
528                 /*
529                  * This od_env_for_commit is only for commit usage.  see
530                  * "struct dt_device"
531                  */
532                 lu_context_enter(&env->le_ctx);
533                 dt_txn_hook_commit(env, th);
534                 lu_context_exit(&env->le_ctx);
535         }
536
537         lu_ref_del_at(&lud->ld_reference, oh->ot_dev_link, "osd-tx", th);
538         lu_device_put(lud);
539         th->th_dev = NULL;
540
541         lu_context_exit(&th->th_ctx);
542         lu_context_fini(&th->th_ctx);
543         OBD_FREE_PTR(oh);
544 }
545
546 /*
547  * Concurrency: shouldn't matter.
548  */
549 static struct thandle *osd_trans_start(const struct lu_env *env,
550                                        struct dt_device *d,
551                                        struct txn_param *p)
552 {
553         struct osd_device  *dev = osd_dt_dev(d);
554         handle_t           *jh;
555         struct osd_thandle *oh;
556         struct thandle     *th;
557         int hook_res;
558
559         ENTRY;
560
561         hook_res = dt_txn_hook_start(env, d, p);
562         if (hook_res != 0)
563                 RETURN(ERR_PTR(hook_res));
564
565         if (osd_param_is_sane(dev, p)) {
566                 OBD_ALLOC_GFP(oh, sizeof *oh, CFS_ALLOC_IO);
567                 if (oh != NULL) {
568                         struct osd_thread_info *oti = osd_oti_get(env);
569
570                         /*
571                          * XXX temporary stuff. Some abstraction layer should
572                          * be used.
573                          */
574
575                         jh = ldiskfs_journal_start_sb(osd_sb(dev), p->tp_credits);
576                         if (!IS_ERR(jh)) {
577                                 oh->ot_handle = jh;
578                                 th = &oh->ot_super;
579                                 th->th_dev = d;
580                                 th->th_result = 0;
581                                 jh->h_sync = p->tp_sync;
582                                 lu_device_get(&d->dd_lu_dev);
583                                 oh->ot_dev_link = lu_ref_add
584                                         (&d->dd_lu_dev.ld_reference,
585                                          "osd-tx", th);
586                                 /* add commit callback */
587                                 lu_context_init(&th->th_ctx, LCT_TX_HANDLE);
588                                 lu_context_enter(&th->th_ctx);
589                                 osd_journal_callback_set(jh, osd_trans_commit_cb,
590                                                          (struct journal_callback *)&oh->ot_jcb);
591                                         LASSERT(oti->oti_txns == 0);
592                                         LASSERT(oti->oti_r_locks == 0);
593                                         LASSERT(oti->oti_w_locks == 0);
594                                         oti->oti_txns++;
595                         } else {
596                                 OBD_FREE_PTR(oh);
597                                 th = (void *)jh;
598                         }
599                 } else
600                         th = ERR_PTR(-ENOMEM);
601         } else {
602                 CERROR("Invalid transaction parameters\n");
603                 th = ERR_PTR(-EINVAL);
604         }
605
606         RETURN(th);
607 }
608
609 /*
610  * Concurrency: shouldn't matter.
611  */
612 static void osd_trans_stop(const struct lu_env *env, struct thandle *th)
613 {
614         int result;
615         struct osd_thandle *oh;
616         struct osd_thread_info *oti = osd_oti_get(env);
617
618         ENTRY;
619
620         oh = container_of0(th, struct osd_thandle, ot_super);
621         if (oh->ot_handle != NULL) {
622                 handle_t *hdl = oh->ot_handle;
623
624                 LASSERT(oti->oti_txns == 1);
625                 oti->oti_txns--;
626                 LASSERT(oti->oti_r_locks == 0);
627                 LASSERT(oti->oti_w_locks == 0);
628                 result = dt_txn_hook_stop(env, th);
629                 if (result != 0)
630                         CERROR("Failure in transaction hook: %d\n", result);
631                 oh->ot_handle = NULL;
632                 result = ldiskfs_journal_stop(hdl);
633                 if (result != 0)
634                         CERROR("Failure to stop transaction: %d\n", result);
635         }
636         EXIT;
637 }
638
639 /*
640  * Concurrency: no concurrent access is possible that late in object
641  * life-cycle.
642  */
643 static int osd_inode_remove(const struct lu_env *env, struct osd_object *obj)
644 {
645         const struct lu_fid    *fid = lu_object_fid(&obj->oo_dt.do_lu);
646         struct osd_device      *osd = osd_obj2dev(obj);
647         struct osd_thread_info *oti = osd_oti_get(env);
648         struct txn_param       *prm = &oti->oti_txn;
649         struct lu_env          *env_del_obj = &oti->oti_obj_delete_tx_env;
650         struct thandle         *th;
651         int result;
652
653         lu_env_init(env_del_obj, LCT_DT_THREAD);
654         txn_param_init(prm, OSD_TXN_OI_DELETE_CREDITS +
655                             OSD_TXN_INODE_DELETE_CREDITS);
656         th = osd_trans_start(env_del_obj, &osd->od_dt_dev, prm);
657         if (!IS_ERR(th)) {
658                 result = osd_oi_delete(osd_oti_get(env_del_obj),
659                                        &osd->od_oi, fid, th);
660                 osd_trans_stop(env_del_obj, th);
661         } else
662                 result = PTR_ERR(th);
663
664         lu_env_fini(env_del_obj);
665         return result;
666 }
667
668 /*
669  * Called just before object is freed. Releases all resources except for
670  * object itself (that is released by osd_object_free()).
671  *
672  * Concurrency: no concurrent access is possible that late in object
673  * life-cycle.
674  */
675 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
676 {
677         struct osd_object *obj   = osd_obj(l);
678         struct inode      *inode = obj->oo_inode;
679
680         LINVRNT(osd_invariant(obj));
681
682         /*
683          * If object is unlinked remove fid->ino mapping from object index.
684          */
685
686         osd_index_fini(obj);
687         if (inode != NULL) {
688                 int result;
689
690                 if (osd_inode_unlinked(inode)) {
691                         result = osd_inode_remove(env, obj);
692                         if (result != 0)
693                                 LU_OBJECT_DEBUG(D_ERROR, env, l,
694                                                 "Failed to cleanup: %d\n",
695                                                 result);
696                 }
697
698                 iput(inode);
699                 obj->oo_inode = NULL;
700         }
701 }
702
703 /*
704  * Concurrency: ->loo_object_release() is called under site spin-lock.
705  */
706 static void osd_object_release(const struct lu_env *env,
707                                struct lu_object *l)
708 {
709         struct osd_object *o = osd_obj(l);
710
711         LASSERT(!lu_object_is_dying(l->lo_header));
712         if (o->oo_inode != NULL && osd_inode_unlinked(o->oo_inode))
713                 cfs_set_bit(LU_OBJECT_HEARD_BANSHEE, &l->lo_header->loh_flags);
714 }
715
716 /*
717  * Concurrency: shouldn't matter.
718  */
719 static int osd_object_print(const struct lu_env *env, void *cookie,
720                             lu_printer_t p, const struct lu_object *l)
721 {
722         struct osd_object *o = osd_obj(l);
723         struct iam_descr  *d;
724
725         if (o->oo_dir != NULL)
726                 d = o->oo_dir->od_container.ic_descr;
727         else
728                 d = NULL;
729         return (*p)(env, cookie, LUSTRE_OSD_NAME"-object@%p(i:%p:%lu/%u)[%s]",
730                     o, o->oo_inode,
731                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
732                     o->oo_inode ? o->oo_inode->i_generation : 0,
733                     d ? d->id_ops->id_name : "plain");
734 }
735
736 /*
737  * Concurrency: shouldn't matter.
738  */
739 int osd_statfs(const struct lu_env *env, struct dt_device *d,
740                cfs_kstatfs_t *sfs)
741 {
742         struct osd_device *osd = osd_dt_dev(d);
743         struct super_block *sb = osd_sb(osd);
744         int result = 0;
745
746         cfs_spin_lock(&osd->od_osfs_lock);
747         /* cache 1 second */
748         if (cfs_time_before_64(osd->od_osfs_age, cfs_time_shift_64(-1))) {
749                 result = ll_do_statfs(sb, &osd->od_kstatfs);
750                 if (likely(result == 0)) /* N.B. statfs can't really fail */
751                         osd->od_osfs_age = cfs_time_current_64();
752         }
753
754         if (likely(result == 0))
755                 *sfs = osd->od_kstatfs;
756         cfs_spin_unlock(&osd->od_osfs_lock);
757
758         return result;
759 }
760
761 /*
762  * Concurrency: doesn't access mutable data.
763  */
764 static void osd_conf_get(const struct lu_env *env,
765                          const struct dt_device *dev,
766                          struct dt_device_param *param)
767 {
768         /*
769          * XXX should be taken from not-yet-existing fs abstraction layer.
770          */
771         param->ddp_max_name_len  = LDISKFS_NAME_LEN;
772         param->ddp_max_nlink     = LDISKFS_LINK_MAX;
773         param->ddp_block_shift   = osd_sb(osd_dt_dev(dev))->s_blocksize_bits;
774 }
775
776 /**
777  * Helper function to get and fill the buffer with input values.
778  */
779 static struct lu_buf *osd_buf_get(const struct lu_env *env, void *area, ssize_t len)
780 {
781         struct lu_buf *buf;
782
783         buf = &osd_oti_get(env)->oti_buf;
784         buf->lb_buf = area;
785         buf->lb_len = len;
786         return buf;
787 }
788
789 /*
790  * Concurrency: shouldn't matter.
791  */
792 static int osd_sync(const struct lu_env *env, struct dt_device *d)
793 {
794         CDEBUG(D_HA, "syncing OSD %s\n", LUSTRE_OSD_NAME);
795         return ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
796 }
797
798 /**
799  * Start commit for OSD device.
800  *
801  * An implementation of dt_commit_async method for OSD device.
802  * Asychronously starts underlayng fs sync and thereby a transaction
803  * commit.
804  *
805  * \param env environment
806  * \param d dt device
807  *
808  * \see dt_device_operations
809  */
810 static int osd_commit_async(const struct lu_env *env,
811                             struct dt_device *d)
812 {
813         struct super_block *s = osd_sb(osd_dt_dev(d));
814         ENTRY;
815
816         CDEBUG(D_HA, "async commit OSD %s\n", LUSTRE_OSD_NAME);
817         RETURN(s->s_op->sync_fs(s, 0));
818 }
819
820 /*
821  * Concurrency: shouldn't matter.
822  */
823 lvfs_sbdev_type fsfilt_ldiskfs_journal_sbdev(struct super_block *);
824
825 static void osd_ro(const struct lu_env *env, struct dt_device *d)
826 {
827         ENTRY;
828
829         CERROR("*** setting device %s read-only ***\n", LUSTRE_OSD_NAME);
830
831         __lvfs_set_rdonly(lvfs_sbdev(osd_sb(osd_dt_dev(d))),
832                           fsfilt_ldiskfs_journal_sbdev(osd_sb(osd_dt_dev(d))));
833         EXIT;
834 }
835
836
837 /*
838  * Concurrency: serialization provided by callers.
839  */
840 static int osd_init_capa_ctxt(const struct lu_env *env, struct dt_device *d,
841                               int mode, unsigned long timeout, __u32 alg,
842                               struct lustre_capa_key *keys)
843 {
844         struct osd_device *dev = osd_dt_dev(d);
845         ENTRY;
846
847         dev->od_fl_capa = mode;
848         dev->od_capa_timeout = timeout;
849         dev->od_capa_alg = alg;
850         dev->od_capa_keys = keys;
851         RETURN(0);
852 }
853
854 /**
855  * Concurrency: serialization provided by callers.
856  */
857 static void osd_init_quota_ctxt(const struct lu_env *env, struct dt_device *d,
858                                struct dt_quota_ctxt *ctxt, void *data)
859 {
860         struct obd_device *obd = (void *)ctxt;
861         struct vfsmount *mnt = (struct vfsmount *)data;
862         ENTRY;
863
864         obd->u.obt.obt_sb = mnt->mnt_root->d_inode->i_sb;
865         OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
866         obd->obd_lvfs_ctxt.pwdmnt = mnt;
867         obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
868         obd->obd_lvfs_ctxt.fs = get_ds();
869
870         EXIT;
871 }
872
873 /**
874  * Note: we do not count into QUOTA here.
875  * If we mount with --data_journal we may need more.
876  */
877 static const int osd_dto_credits_noquota[DTO_NR] = {
878         /**
879          * Insert/Delete.
880          * INDEX_EXTRA_TRANS_BLOCKS(8) +
881          * SINGLEDATA_TRANS_BLOCKS(8)
882          * XXX Note: maybe iam need more, since iam have more level than
883          *           EXT3 htree.
884          */
885         [DTO_INDEX_INSERT]  = 16,
886         [DTO_INDEX_DELETE]  = 16,
887         /**
888          * Unused now
889          */
890         [DTO_IDNEX_UPDATE]  = 16,
891         /**
892          * Create a object. The same as create object in EXT3.
893          * DATA_TRANS_BLOCKS(14) +
894          * INDEX_EXTRA_BLOCKS(8) +
895          * 3(inode bits, groups, GDT)
896          */
897         [DTO_OBJECT_CREATE] = 25,
898         /**
899          * Unused now
900          */
901         [DTO_OBJECT_DELETE] = 25,
902         /**
903          * Attr set credits.
904          * 3(inode bits, group, GDT)
905          */
906         [DTO_ATTR_SET_BASE] = 3,
907         /**
908          * Xattr set. The same as xattr of EXT3.
909          * DATA_TRANS_BLOCKS(14)
910          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
911          * are also counted in. Do not know why?
912          */
913         [DTO_XATTR_SET]     = 14,
914         [DTO_LOG_REC]       = 14,
915         /**
916          * creadits for inode change during write.
917          */
918         [DTO_WRITE_BASE]    = 3,
919         /**
920          * credits for single block write.
921          */
922         [DTO_WRITE_BLOCK]   = 14,
923         /**
924          * Attr set credits for chown.
925          * This is extra credits for setattr, and it is null without quota
926          */
927         [DTO_ATTR_SET_CHOWN]= 0
928 };
929
930 /**
931  * Note: we count into QUOTA here.
932  * If we mount with --data_journal we may need more.
933  */
934 static const int osd_dto_credits_quota[DTO_NR] = {
935         /**
936          * INDEX_EXTRA_TRANS_BLOCKS(8) +
937          * SINGLEDATA_TRANS_BLOCKS(8) +
938          * 2 * QUOTA_TRANS_BLOCKS(2)
939          */
940         [DTO_INDEX_INSERT]  = 20,
941         /**
942          * INDEX_EXTRA_TRANS_BLOCKS(8) +
943          * SINGLEDATA_TRANS_BLOCKS(8) +
944          * 2 * QUOTA_TRANS_BLOCKS(2)
945          */
946         [DTO_INDEX_DELETE]  = 20,
947         /**
948          * Unused now.
949          */
950         [DTO_IDNEX_UPDATE]  = 16,
951         /*
952          * Create a object. Same as create object in EXT3 filesystem.
953          * DATA_TRANS_BLOCKS(16) +
954          * INDEX_EXTRA_BLOCKS(8) +
955          * 3(inode bits, groups, GDT) +
956          * 2 * QUOTA_INIT_BLOCKS(25)
957          */
958         [DTO_OBJECT_CREATE] = 77,
959         /*
960          * Unused now.
961          * DATA_TRANS_BLOCKS(16) +
962          * INDEX_EXTRA_BLOCKS(8) +
963          * 3(inode bits, groups, GDT) +
964          * QUOTA(?)
965          */
966         [DTO_OBJECT_DELETE] = 27,
967         /**
968          * Attr set credits.
969          * 3 (inode bit, group, GDT) +
970          */
971         [DTO_ATTR_SET_BASE] = 3,
972         /**
973          * Xattr set. The same as xattr of EXT3.
974          * DATA_TRANS_BLOCKS(16)
975          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS are
976          *           also counted in. Do not know why?
977          */
978         [DTO_XATTR_SET]     = 16,
979         [DTO_LOG_REC]       = 16,
980         /**
981          * creadits for inode change during write.
982          */
983         [DTO_WRITE_BASE]    = 3,
984         /**
985          * credits for single block write.
986          */
987         [DTO_WRITE_BLOCK]   = 16,
988         /**
989          * Attr set credits for chown.
990          * It is added to already set setattr credits
991          * 2 * QUOTA_INIT_BLOCKS(25) +
992          * 2 * QUOTA_DEL_BLOCKS(9)
993          */
994         [DTO_ATTR_SET_CHOWN]= 68,
995 };
996
997 static int osd_credit_get(const struct lu_env *env, struct dt_device *d,
998                           enum dt_txn_op op)
999 {
1000         LASSERT(ARRAY_SIZE(osd_dto_credits_noquota) ==
1001                 ARRAY_SIZE(osd_dto_credits_quota));
1002         LASSERT(0 <= op && op < ARRAY_SIZE(osd_dto_credits_noquota));
1003 #ifdef HAVE_QUOTA_SUPPORT
1004         if (test_opt(osd_sb(osd_dt_dev(d)), QUOTA))
1005                 return osd_dto_credits_quota[op];
1006         else
1007 #endif
1008                 return osd_dto_credits_noquota[op];
1009 }
1010
1011 static const struct dt_device_operations osd_dt_ops = {
1012         .dt_root_get       = osd_root_get,
1013         .dt_statfs         = osd_statfs,
1014         .dt_trans_start    = osd_trans_start,
1015         .dt_trans_stop     = osd_trans_stop,
1016         .dt_conf_get       = osd_conf_get,
1017         .dt_sync           = osd_sync,
1018         .dt_ro             = osd_ro,
1019         .dt_commit_async   = osd_commit_async,
1020         .dt_credit_get     = osd_credit_get,
1021         .dt_init_capa_ctxt = osd_init_capa_ctxt,
1022         .dt_init_quota_ctxt= osd_init_quota_ctxt,
1023 };
1024
1025 static void osd_object_read_lock(const struct lu_env *env,
1026                                  struct dt_object *dt, unsigned role)
1027 {
1028         struct osd_object *obj = osd_dt_obj(dt);
1029         struct osd_thread_info *oti = osd_oti_get(env);
1030
1031         LINVRNT(osd_invariant(obj));
1032
1033         LASSERT(obj->oo_owner != env);
1034         cfs_down_read_nested(&obj->oo_sem, role);
1035
1036         LASSERT(obj->oo_owner == NULL);
1037         oti->oti_r_locks++;
1038 }
1039
1040 static void osd_object_write_lock(const struct lu_env *env,
1041                                   struct dt_object *dt, unsigned role)
1042 {
1043         struct osd_object *obj = osd_dt_obj(dt);
1044         struct osd_thread_info *oti = osd_oti_get(env);
1045
1046         LINVRNT(osd_invariant(obj));
1047
1048         LASSERT(obj->oo_owner != env);
1049         cfs_down_write_nested(&obj->oo_sem, role);
1050
1051         LASSERT(obj->oo_owner == NULL);
1052         obj->oo_owner = env;
1053         oti->oti_w_locks++;
1054 }
1055
1056 static void osd_object_read_unlock(const struct lu_env *env,
1057                                    struct dt_object *dt)
1058 {
1059         struct osd_object *obj = osd_dt_obj(dt);
1060         struct osd_thread_info *oti = osd_oti_get(env);
1061
1062         LINVRNT(osd_invariant(obj));
1063
1064         LASSERT(oti->oti_r_locks > 0);
1065         oti->oti_r_locks--;
1066         cfs_up_read(&obj->oo_sem);
1067 }
1068
1069 static void osd_object_write_unlock(const struct lu_env *env,
1070                                     struct dt_object *dt)
1071 {
1072         struct osd_object *obj = osd_dt_obj(dt);
1073         struct osd_thread_info *oti = osd_oti_get(env);
1074
1075         LINVRNT(osd_invariant(obj));
1076
1077         LASSERT(obj->oo_owner == env);
1078         LASSERT(oti->oti_w_locks > 0);
1079         oti->oti_w_locks--;
1080         obj->oo_owner = NULL;
1081         cfs_up_write(&obj->oo_sem);
1082 }
1083
1084 static int osd_object_write_locked(const struct lu_env *env,
1085                                    struct dt_object *dt)
1086 {
1087         struct osd_object *obj = osd_dt_obj(dt);
1088
1089         LINVRNT(osd_invariant(obj));
1090
1091         return obj->oo_owner == env;
1092 }
1093
1094 static int capa_is_sane(const struct lu_env *env,
1095                         struct osd_device *dev,
1096                         struct lustre_capa *capa,
1097                         struct lustre_capa_key *keys)
1098 {
1099         struct osd_thread_info *oti = osd_oti_get(env);
1100         struct lustre_capa *tcapa = &oti->oti_capa;
1101         struct obd_capa *oc;
1102         int i, rc = 0;
1103         ENTRY;
1104
1105         oc = capa_lookup(dev->od_capa_hash, capa, 0);
1106         if (oc) {
1107                 if (capa_is_expired(oc)) {
1108                         DEBUG_CAPA(D_ERROR, capa, "expired");
1109                         rc = -ESTALE;
1110                 }
1111                 capa_put(oc);
1112                 RETURN(rc);
1113         }
1114
1115         if (capa_is_expired_sec(capa)) {
1116                 DEBUG_CAPA(D_ERROR, capa, "expired");
1117                 RETURN(-ESTALE);
1118         }
1119
1120         cfs_spin_lock(&capa_lock);
1121         for (i = 0; i < 2; i++) {
1122                 if (keys[i].lk_keyid == capa->lc_keyid) {
1123                         oti->oti_capa_key = keys[i];
1124                         break;
1125                 }
1126         }
1127         cfs_spin_unlock(&capa_lock);
1128
1129         if (i == 2) {
1130                 DEBUG_CAPA(D_ERROR, capa, "no matched capa key");
1131                 RETURN(-ESTALE);
1132         }
1133
1134         rc = capa_hmac(tcapa->lc_hmac, capa, oti->oti_capa_key.lk_key);
1135         if (rc)
1136                 RETURN(rc);
1137
1138         if (memcmp(tcapa->lc_hmac, capa->lc_hmac, sizeof(capa->lc_hmac))) {
1139                 DEBUG_CAPA(D_ERROR, capa, "HMAC mismatch");
1140                 RETURN(-EACCES);
1141         }
1142
1143         oc = capa_add(dev->od_capa_hash, capa);
1144         capa_put(oc);
1145
1146         RETURN(0);
1147 }
1148
1149 static int osd_object_auth(const struct lu_env *env, struct dt_object *dt,
1150                            struct lustre_capa *capa, __u64 opc)
1151 {
1152         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
1153         struct osd_device *dev = osd_dev(dt->do_lu.lo_dev);
1154         struct md_capainfo *ci;
1155         int rc;
1156
1157         if (!dev->od_fl_capa)
1158                 return 0;
1159
1160         if (capa == BYPASS_CAPA)
1161                 return 0;
1162
1163         ci = md_capainfo(env);
1164         if (unlikely(!ci))
1165                 return 0;
1166
1167         if (ci->mc_auth == LC_ID_NONE)
1168                 return 0;
1169
1170         if (!capa) {
1171                 CERROR("no capability is provided for fid "DFID"\n", PFID(fid));
1172                 return -EACCES;
1173         }
1174
1175         if (!lu_fid_eq(fid, &capa->lc_fid)) {
1176                 DEBUG_CAPA(D_ERROR, capa, "fid "DFID" mismatch with",
1177                            PFID(fid));
1178                 return -EACCES;
1179         }
1180
1181         if (!capa_opc_supported(capa, opc)) {
1182                 DEBUG_CAPA(D_ERROR, capa, "opc "LPX64" not supported by", opc);
1183                 return -EACCES;
1184         }
1185
1186         if ((rc = capa_is_sane(env, dev, capa, dev->od_capa_keys))) {
1187                 DEBUG_CAPA(D_ERROR, capa, "insane (rc %d)", rc);
1188                 return -EACCES;
1189         }
1190
1191         return 0;
1192 }
1193
1194 static struct timespec *osd_inode_time(const struct lu_env *env,
1195                                        struct inode *inode, __u64 seconds)
1196 {
1197         struct osd_thread_info *oti = osd_oti_get(env);
1198         struct timespec        *t   = &oti->oti_time;
1199
1200         t->tv_sec  = seconds;
1201         t->tv_nsec = 0;
1202         *t = timespec_trunc(*t, get_sb_time_gran(inode->i_sb));
1203         return t;
1204 }
1205
1206
1207 static void osd_inode_getattr(const struct lu_env *env,
1208                               struct inode *inode, struct lu_attr *attr)
1209 {
1210         attr->la_valid      |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
1211                                LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
1212                                LA_FLAGS | LA_NLINK | LA_RDEV | LA_BLKSIZE;
1213
1214         attr->la_atime      = LTIME_S(inode->i_atime);
1215         attr->la_mtime      = LTIME_S(inode->i_mtime);
1216         attr->la_ctime      = LTIME_S(inode->i_ctime);
1217         attr->la_mode       = inode->i_mode;
1218         attr->la_size       = i_size_read(inode);
1219         attr->la_blocks     = inode->i_blocks;
1220         attr->la_uid        = inode->i_uid;
1221         attr->la_gid        = inode->i_gid;
1222         attr->la_flags      = LDISKFS_I(inode)->i_flags;
1223         attr->la_nlink      = inode->i_nlink;
1224         attr->la_rdev       = inode->i_rdev;
1225         attr->la_blksize    = ll_inode_blksize(inode);
1226         attr->la_blkbits    = inode->i_blkbits;
1227 }
1228
1229 static int osd_attr_get(const struct lu_env *env,
1230                         struct dt_object *dt,
1231                         struct lu_attr *attr,
1232                         struct lustre_capa *capa)
1233 {
1234         struct osd_object *obj = osd_dt_obj(dt);
1235
1236         LASSERT(dt_object_exists(dt));
1237         LINVRNT(osd_invariant(obj));
1238
1239         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1240                 return -EACCES;
1241
1242         cfs_spin_lock(&obj->oo_guard);
1243         osd_inode_getattr(env, obj->oo_inode, attr);
1244         cfs_spin_unlock(&obj->oo_guard);
1245         return 0;
1246 }
1247
1248 static int osd_inode_setattr(const struct lu_env *env,
1249                              struct inode *inode, const struct lu_attr *attr)
1250 {
1251         __u64 bits;
1252
1253         bits = attr->la_valid;
1254
1255         LASSERT(!(bits & LA_TYPE)); /* Huh? You want too much. */
1256
1257 #ifdef HAVE_QUOTA_SUPPORT
1258         if ((bits & LA_UID && attr->la_uid != inode->i_uid) ||
1259             (bits & LA_GID && attr->la_gid != inode->i_gid)) {
1260                 struct osd_ctxt *save = &osd_oti_get(env)->oti_ctxt;
1261                 struct iattr iattr;
1262                 int rc;
1263
1264                 iattr.ia_valid = 0;
1265                 if (bits & LA_UID)
1266                         iattr.ia_valid |= ATTR_UID;
1267                 if (bits & LA_GID)
1268                         iattr.ia_valid |= ATTR_GID;
1269                 iattr.ia_uid = attr->la_uid;
1270                 iattr.ia_gid = attr->la_gid;
1271                 osd_push_ctxt(env, save);
1272                 rc = DQUOT_TRANSFER(inode, &iattr) ? -EDQUOT : 0;
1273                 osd_pop_ctxt(save);
1274                 if (rc != 0)
1275                         return rc;
1276         }
1277 #endif
1278
1279         if (bits & LA_ATIME)
1280                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
1281         if (bits & LA_CTIME)
1282                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
1283         if (bits & LA_MTIME)
1284                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
1285         if (bits & LA_SIZE) {
1286                 LDISKFS_I(inode)->i_disksize = attr->la_size;
1287                 i_size_write(inode, attr->la_size);
1288         }
1289
1290         /* OSD should not change "i_blocks" which is used by quota.
1291          * "i_blocks" should be changed by ldiskfs only.
1292          * Enable this assignment for SOM purpose now, until it is
1293          * stored in SOM EA. */
1294         if (bits & LA_BLOCKS)
1295                 inode->i_blocks = attr->la_blocks;
1296
1297         if (bits & LA_MODE)
1298                 inode->i_mode   = (inode->i_mode & S_IFMT) |
1299                         (attr->la_mode & ~S_IFMT);
1300         if (bits & LA_UID)
1301                 inode->i_uid    = attr->la_uid;
1302         if (bits & LA_GID)
1303                 inode->i_gid    = attr->la_gid;
1304         if (bits & LA_NLINK)
1305                 inode->i_nlink  = attr->la_nlink;
1306         if (bits & LA_RDEV)
1307                 inode->i_rdev   = attr->la_rdev;
1308
1309         if (bits & LA_FLAGS) {
1310                 struct ldiskfs_inode_info *li = LDISKFS_I(inode);
1311
1312                 li->i_flags = (li->i_flags & ~LDISKFS_FL_USER_MODIFIABLE) |
1313                         (attr->la_flags & LDISKFS_FL_USER_MODIFIABLE);
1314         }
1315         return 0;
1316 }
1317
1318 static int osd_attr_set(const struct lu_env *env,
1319                         struct dt_object *dt,
1320                         const struct lu_attr *attr,
1321                         struct thandle *handle,
1322                         struct lustre_capa *capa)
1323 {
1324         struct osd_object *obj = osd_dt_obj(dt);
1325         int rc;
1326
1327         LASSERT(handle != NULL);
1328         LASSERT(dt_object_exists(dt));
1329         LASSERT(osd_invariant(obj));
1330
1331         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1332                 return -EACCES;
1333
1334         cfs_spin_lock(&obj->oo_guard);
1335         rc = osd_inode_setattr(env, obj->oo_inode, attr);
1336         cfs_spin_unlock(&obj->oo_guard);
1337
1338         if (!rc)
1339                 mark_inode_dirty(obj->oo_inode);
1340         return rc;
1341 }
1342
1343 /*
1344  * Object creation.
1345  *
1346  * XXX temporary solution.
1347  */
1348 static int osd_create_pre(struct osd_thread_info *info, struct osd_object *obj,
1349                           struct lu_attr *attr, struct thandle *th)
1350 {
1351         return 0;
1352 }
1353
1354 static int osd_create_post(struct osd_thread_info *info, struct osd_object *obj,
1355                            struct lu_attr *attr, struct thandle *th)
1356 {
1357         osd_object_init0(obj);
1358         return 0;
1359 }
1360
1361 static struct dentry * osd_child_dentry_get(const struct lu_env *env,
1362                                             struct osd_object *obj,
1363                                             const char *name,
1364                                             const int namelen)
1365 {
1366         struct osd_thread_info *info   = osd_oti_get(env);
1367         struct dentry *child_dentry = &info->oti_child_dentry;
1368         struct dentry *obj_dentry = &info->oti_obj_dentry;
1369
1370         obj_dentry->d_inode = obj->oo_inode;
1371         obj_dentry->d_sb = osd_sb(osd_obj2dev(obj));
1372         obj_dentry->d_name.hash = 0;
1373
1374         child_dentry->d_name.hash = 0;
1375         child_dentry->d_parent = obj_dentry;
1376         child_dentry->d_name.name = name;
1377         child_dentry->d_name.len = namelen;
1378         return child_dentry;
1379 }
1380
1381
1382 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
1383                       cfs_umode_t mode,
1384                       struct dt_allocation_hint *hint,
1385                       struct thandle *th)
1386 {
1387         int result;
1388         struct osd_device  *osd = osd_obj2dev(obj);
1389         struct osd_thandle *oth;
1390         struct dt_object   *parent;
1391         struct inode       *inode;
1392 #ifdef HAVE_QUOTA_SUPPORT
1393         struct osd_ctxt    *save = &info->oti_ctxt;
1394 #endif
1395
1396         LINVRNT(osd_invariant(obj));
1397         LASSERT(obj->oo_inode == NULL);
1398
1399         oth = container_of(th, struct osd_thandle, ot_super);
1400         LASSERT(oth->ot_handle->h_transaction != NULL);
1401
1402         if (hint && hint->dah_parent)
1403                 parent = hint->dah_parent;
1404         else
1405                 parent = osd->od_obj_area;
1406
1407         LASSERT(parent != NULL);
1408         LASSERT(osd_dt_obj(parent)->oo_inode->i_op != NULL);
1409
1410 #ifdef HAVE_QUOTA_SUPPORT
1411         osd_push_ctxt(info->oti_env, save);
1412 #endif
1413         inode = ldiskfs_create_inode(oth->ot_handle,
1414                                      osd_dt_obj(parent)->oo_inode, mode);
1415 #ifdef HAVE_QUOTA_SUPPORT
1416         osd_pop_ctxt(save);
1417 #endif
1418         if (!IS_ERR(inode)) {
1419                 obj->oo_inode = inode;
1420                 result = 0;
1421         } else
1422                 result = PTR_ERR(inode);
1423         LINVRNT(osd_invariant(obj));
1424         return result;
1425 }
1426
1427 enum {
1428         OSD_NAME_LEN = 255
1429 };
1430
1431 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
1432                      struct lu_attr *attr,
1433                      struct dt_allocation_hint *hint,
1434                      struct dt_object_format *dof,
1435                      struct thandle *th)
1436 {
1437         int result;
1438         struct osd_thandle *oth;
1439         struct osd_device *osd = osd_obj2dev(obj);
1440         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX));
1441
1442         LASSERT(S_ISDIR(attr->la_mode));
1443
1444         oth = container_of(th, struct osd_thandle, ot_super);
1445         LASSERT(oth->ot_handle->h_transaction != NULL);
1446         result = osd_mkfile(info, obj, mode, hint, th);
1447         if (result == 0 && osd->od_iop_mode == 0) {
1448                 LASSERT(obj->oo_inode != NULL);
1449                 /*
1450                  * XXX uh-oh... call low-level iam function directly.
1451                  */
1452
1453                 result = iam_lvar_create(obj->oo_inode, OSD_NAME_LEN, 4,
1454                                          sizeof (struct osd_fid_pack),
1455                                          oth->ot_handle);
1456         }
1457         return result;
1458 }
1459
1460 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
1461                         struct lu_attr *attr,
1462                         struct dt_allocation_hint *hint,
1463                         struct dt_object_format *dof,
1464                         struct thandle *th)
1465 {
1466         int result;
1467         struct osd_thandle *oth;
1468         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
1469
1470         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX));
1471
1472         LASSERT(S_ISREG(attr->la_mode));
1473
1474         oth = container_of(th, struct osd_thandle, ot_super);
1475         LASSERT(oth->ot_handle->h_transaction != NULL);
1476
1477         result = osd_mkfile(info, obj, mode, hint, th);
1478         if (result == 0) {
1479                 LASSERT(obj->oo_inode != NULL);
1480                 if (feat->dif_flags & DT_IND_VARKEY)
1481                         result = iam_lvar_create(obj->oo_inode,
1482                                                  feat->dif_keysize_max,
1483                                                  feat->dif_ptrsize,
1484                                                  feat->dif_recsize_max,
1485                                                  oth->ot_handle);
1486                 else
1487                         result = iam_lfix_create(obj->oo_inode,
1488                                                  feat->dif_keysize_max,
1489                                                  feat->dif_ptrsize,
1490                                                  feat->dif_recsize_max,
1491                                                  oth->ot_handle);
1492
1493         }
1494         return result;
1495 }
1496
1497 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
1498                      struct lu_attr *attr,
1499                      struct dt_allocation_hint *hint,
1500                      struct dt_object_format *dof,
1501                      struct thandle *th)
1502 {
1503         LASSERT(S_ISREG(attr->la_mode));
1504         return osd_mkfile(info, obj, (attr->la_mode &
1505                                (S_IFMT | S_IRWXUGO | S_ISVTX)), hint, th);
1506 }
1507
1508 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
1509                      struct lu_attr *attr,
1510                      struct dt_allocation_hint *hint,
1511                      struct dt_object_format *dof,
1512                      struct thandle *th)
1513 {
1514         LASSERT(S_ISLNK(attr->la_mode));
1515         return osd_mkfile(info, obj, (attr->la_mode &
1516                               (S_IFMT | S_IRWXUGO | S_ISVTX)), hint, th);
1517 }
1518
1519 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
1520                      struct lu_attr *attr,
1521                      struct dt_allocation_hint *hint,
1522                      struct dt_object_format *dof,
1523                      struct thandle *th)
1524 {
1525         cfs_umode_t mode = attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX);
1526         int result;
1527
1528         LINVRNT(osd_invariant(obj));
1529         LASSERT(obj->oo_inode == NULL);
1530         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
1531                 S_ISFIFO(mode) || S_ISSOCK(mode));
1532
1533         result = osd_mkfile(info, obj, mode, hint, th);
1534         if (result == 0) {
1535                 LASSERT(obj->oo_inode != NULL);
1536                 init_special_inode(obj->oo_inode, mode, attr->la_rdev);
1537         }
1538         LINVRNT(osd_invariant(obj));
1539         return result;
1540 }
1541
1542 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
1543                               struct lu_attr *,
1544                               struct dt_allocation_hint *hint,
1545                               struct dt_object_format *dof,
1546                               struct thandle *);
1547
1548 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
1549 {
1550         osd_obj_type_f result;
1551
1552         switch (type) {
1553         case DFT_DIR:
1554                 result = osd_mkdir;
1555                 break;
1556         case DFT_REGULAR:
1557                 result = osd_mkreg;
1558                 break;
1559         case DFT_SYM:
1560                 result = osd_mksym;
1561                 break;
1562         case DFT_NODE:
1563                 result = osd_mknod;
1564                 break;
1565         case DFT_INDEX:
1566                 result = osd_mk_index;
1567                 break;
1568
1569         default:
1570                 LBUG();
1571                 break;
1572         }
1573         return result;
1574 }
1575
1576
1577 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
1578                         struct dt_object *parent, cfs_umode_t child_mode)
1579 {
1580         LASSERT(ah);
1581
1582         memset(ah, 0, sizeof(*ah));
1583         ah->dah_parent = parent;
1584         ah->dah_mode = child_mode;
1585 }
1586
1587 /**
1588  * Helper function for osd_object_create()
1589  *
1590  * \retval 0, on success
1591  */
1592 static int __osd_object_create(struct osd_thread_info *info,
1593                                struct osd_object *obj, struct lu_attr *attr,
1594                                struct dt_allocation_hint *hint,
1595                                struct dt_object_format *dof,
1596                                struct thandle *th)
1597 {
1598
1599         int result;
1600
1601         result = osd_create_pre(info, obj, attr, th);
1602         if (result == 0) {
1603                 result = osd_create_type_f(dof->dof_type)(info, obj,
1604                                            attr, hint, dof, th);
1605                 if (result == 0)
1606                         result = osd_create_post(info, obj, attr, th);
1607         }
1608         return result;
1609 }
1610
1611 /**
1612  * Helper function for osd_object_create()
1613  *
1614  * \retval 0, on success
1615  */
1616 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
1617                            const struct lu_fid *fid, struct thandle *th)
1618 {
1619         struct osd_thread_info *info = osd_oti_get(env);
1620         struct osd_inode_id    *id   = &info->oti_id;
1621         struct osd_device      *osd  = osd_obj2dev(obj);
1622         struct md_ucred        *uc   = md_ucred(env);
1623
1624         LASSERT(obj->oo_inode != NULL);
1625         LASSERT(uc != NULL);
1626
1627         id->oii_ino = obj->oo_inode->i_ino;
1628         id->oii_gen = obj->oo_inode->i_generation;
1629
1630         return osd_oi_insert(info, &osd->od_oi, fid, id, th,
1631                              uc->mu_cap & CFS_CAP_SYS_RESOURCE_MASK);
1632 }
1633
1634 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
1635                              struct lu_attr *attr,
1636                              struct dt_allocation_hint *hint,
1637                              struct dt_object_format *dof,
1638                              struct thandle *th)
1639 {
1640         const struct lu_fid    *fid    = lu_object_fid(&dt->do_lu);
1641         struct osd_object      *obj    = osd_dt_obj(dt);
1642         struct osd_thread_info *info   = osd_oti_get(env);
1643         int result;
1644
1645         ENTRY;
1646
1647         LINVRNT(osd_invariant(obj));
1648         LASSERT(!dt_object_exists(dt));
1649         LASSERT(osd_write_locked(env, obj));
1650         LASSERT(th != NULL);
1651
1652         result = __osd_object_create(info, obj, attr, hint, dof, th);
1653         if (result == 0)
1654                 result = __osd_oi_insert(env, obj, fid, th);
1655
1656         LASSERT(ergo(result == 0, dt_object_exists(dt)));
1657         LASSERT(osd_invariant(obj));
1658         RETURN(result);
1659 }
1660
1661 /**
1662  * Helper function for osd_xattr_set()
1663  */
1664 static int __osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
1665                            const struct lu_buf *buf, const char *name, int fl)
1666 {
1667         struct osd_object      *obj      = osd_dt_obj(dt);
1668         struct inode           *inode    = obj->oo_inode;
1669         struct osd_thread_info *info     = osd_oti_get(env);
1670         struct dentry          *dentry   = &info->oti_child_dentry;
1671         struct timespec        *t        = &info->oti_time;
1672         int                     fs_flags = 0;
1673         int  rc;
1674
1675         LASSERT(dt_object_exists(dt));
1676         LASSERT(inode->i_op != NULL && inode->i_op->setxattr != NULL);
1677         LASSERT(osd_write_locked(env, obj));
1678
1679         if (fl & LU_XATTR_REPLACE)
1680                 fs_flags |= XATTR_REPLACE;
1681
1682         if (fl & LU_XATTR_CREATE)
1683                 fs_flags |= XATTR_CREATE;
1684
1685         dentry->d_inode = inode;
1686         *t = inode->i_ctime;
1687         rc = inode->i_op->setxattr(dentry, name, buf->lb_buf,
1688                                    buf->lb_len, fs_flags);
1689         /* ctime should not be updated with server-side time. */
1690         cfs_spin_lock(&obj->oo_guard);
1691         inode->i_ctime = *t;
1692         cfs_spin_unlock(&obj->oo_guard);
1693         mark_inode_dirty(inode);
1694         return rc;
1695 }
1696
1697 /**
1698  * Put the fid into lustre_mdt_attrs, and then place the structure
1699  * inode's ea. This fid should not be altered during the life time
1700  * of the inode.
1701  *
1702  * \retval +ve, on success
1703  * \retval -ve, on error
1704  *
1705  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
1706  */
1707 static int osd_ea_fid_set(const struct lu_env *env, struct dt_object *dt,
1708                           const struct lu_fid *fid)
1709 {
1710         struct osd_thread_info  *info      = osd_oti_get(env);
1711         struct lustre_mdt_attrs *mdt_attrs = &info->oti_mdt_attrs;
1712
1713         lustre_lma_init(mdt_attrs, fid);
1714         lustre_lma_swab(mdt_attrs);
1715         return __osd_xattr_set(env, dt,
1716                                osd_buf_get(env, mdt_attrs, sizeof *mdt_attrs),
1717                                XATTR_NAME_LMA, LU_XATTR_CREATE);
1718
1719 }
1720
1721 /**
1722  * Helper function to form igif
1723  */
1724 static inline void osd_igif_get(const struct lu_env *env, struct inode  *inode,
1725                                 struct lu_fid *fid)
1726 {
1727         lu_igif_build(fid, inode->i_ino, inode->i_generation);
1728 }
1729
1730 /**
1731  * Helper function to pack the fid
1732  */
1733 void osd_fid_pack(struct osd_fid_pack *pack, const struct dt_rec *fid,
1734                   struct lu_fid *befider)
1735 {
1736         fid_cpu_to_be(befider, (struct lu_fid *)fid);
1737         memcpy(pack->fp_area, befider, sizeof(*befider));
1738         pack->fp_len =  sizeof(*befider) + 1;
1739 }
1740
1741 int osd_fid_unpack(struct lu_fid *fid, const struct osd_fid_pack *pack)
1742 {
1743         int result;
1744
1745         result = 0;
1746         switch (pack->fp_len) {
1747         case sizeof *fid + 1:
1748                 memcpy(fid, pack->fp_area, sizeof *fid);
1749                 fid_be_to_cpu(fid, fid);
1750                 break;
1751         default:
1752                 CERROR("Unexpected packed fid size: %d\n", pack->fp_len);
1753                 result = -EIO;
1754         }
1755         return result;
1756 }
1757
1758 /**
1759  * Try to read the fid from inode ea into dt_rec, if return value
1760  * i.e. rc is +ve, then we got fid, otherwise we will have to form igif
1761  *
1762  * \param fid object fid.
1763  *
1764  * \retval 0 on success
1765  */
1766 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
1767                           __u32 ino, struct lu_fid *fid)
1768 {
1769         struct osd_thread_info  *info      = osd_oti_get(env);
1770         struct lustre_mdt_attrs *mdt_attrs = &info->oti_mdt_attrs;
1771         struct lu_device        *ldev   = obj->oo_dt.do_lu.lo_dev;
1772         struct dentry           *dentry = &info->oti_child_dentry;
1773         struct osd_inode_id     *id     = &info->oti_id;
1774         struct osd_device       *dev;
1775         struct inode            *inode;
1776         int                      rc;
1777
1778         ENTRY;
1779         dev  = osd_dev(ldev);
1780
1781         id->oii_ino = ino;
1782         id->oii_gen = OSD_OII_NOGEN;
1783
1784         inode = osd_iget(info, dev, id);
1785         if (IS_ERR(inode)) {
1786                 rc = PTR_ERR(inode);
1787                 GOTO(out,rc);
1788         }
1789         dentry->d_inode = inode;
1790
1791         LASSERT(inode->i_op != NULL && inode->i_op->getxattr != NULL);
1792         rc = inode->i_op->getxattr(dentry, XATTR_NAME_LMA, (void *)mdt_attrs,
1793                                    sizeof *mdt_attrs);
1794
1795         /* Check LMA compatibility */
1796         if (rc > 0 &&
1797             (mdt_attrs->lma_incompat & ~cpu_to_le32(LMA_INCOMPAT_SUPP))) {
1798                 CWARN("Inode %lx: Unsupported incompat LMA feature(s) %#x\n",
1799                       inode->i_ino, le32_to_cpu(mdt_attrs->lma_incompat) &
1800                       ~LMA_INCOMPAT_SUPP);
1801                 return -ENOSYS;
1802         }
1803
1804         if (rc > 0) {
1805                 lustre_lma_swab(mdt_attrs);
1806                 memcpy(fid, &mdt_attrs->lma_self_fid, sizeof(*fid));
1807                 rc = 0;
1808         } else if (rc == -ENODATA) {
1809                 osd_igif_get(env, inode, fid);
1810                 rc = 0;
1811         }
1812         iput(inode);
1813
1814 out:
1815         RETURN(rc);
1816 }
1817
1818 /**
1819  * OSD layer object create function for interoperability mode (b11826).
1820  * This is mostly similar to osd_object_create(). Only difference being, fid is
1821  * inserted into inode ea here.
1822  *
1823  * \retval   0, on success
1824  * \retval -ve, on error
1825  */
1826 static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
1827                              struct lu_attr *attr,
1828                              struct dt_allocation_hint *hint,
1829                              struct dt_object_format *dof,
1830                              struct thandle *th)
1831 {
1832         const struct lu_fid    *fid    = lu_object_fid(&dt->do_lu);
1833         struct osd_object      *obj    = osd_dt_obj(dt);
1834         struct osd_thread_info *info   = osd_oti_get(env);
1835         int result;
1836         int is_root = 0;
1837
1838         ENTRY;
1839
1840         LASSERT(osd_invariant(obj));
1841         LASSERT(!dt_object_exists(dt));
1842         LASSERT(osd_write_locked(env, obj));
1843         LASSERT(th != NULL);
1844
1845         result = __osd_object_create(info, obj, attr, hint, dof, th);
1846
1847         if (hint && hint->dah_parent)
1848                 is_root = osd_object_is_root(osd_dt_obj(hint->dah_parent));
1849
1850         /* objects under osd root shld have igif fid, so dont add fid EA */
1851         if (result == 0 && is_root == 0)
1852                 result = osd_ea_fid_set(env, dt, fid);
1853
1854         if (result == 0)
1855                 result = __osd_oi_insert(env, obj, fid, th);
1856
1857         LASSERT(ergo(result == 0, dt_object_exists(dt)));
1858         LINVRNT(osd_invariant(obj));
1859         RETURN(result);
1860 }
1861
1862 /*
1863  * Concurrency: @dt is write locked.
1864  */
1865 static void osd_object_ref_add(const struct lu_env *env,
1866                                struct dt_object *dt,
1867                                struct thandle *th)
1868 {
1869         struct osd_object *obj = osd_dt_obj(dt);
1870         struct inode *inode = obj->oo_inode;
1871
1872         LINVRNT(osd_invariant(obj));
1873         LASSERT(dt_object_exists(dt));
1874         LASSERT(osd_write_locked(env, obj));
1875         LASSERT(th != NULL);
1876
1877         cfs_spin_lock(&obj->oo_guard);
1878         LASSERT(inode->i_nlink < LDISKFS_LINK_MAX);
1879         inode->i_nlink++;
1880         cfs_spin_unlock(&obj->oo_guard);
1881         mark_inode_dirty(inode);
1882         LINVRNT(osd_invariant(obj));
1883 }
1884
1885 /*
1886  * Concurrency: @dt is write locked.
1887  */
1888 static void osd_object_ref_del(const struct lu_env *env,
1889                                struct dt_object *dt,
1890                                struct thandle *th)
1891 {
1892         struct osd_object *obj = osd_dt_obj(dt);
1893         struct inode *inode = obj->oo_inode;
1894
1895         LINVRNT(osd_invariant(obj));
1896         LASSERT(dt_object_exists(dt));
1897         LASSERT(osd_write_locked(env, obj));
1898         LASSERT(th != NULL);
1899
1900         cfs_spin_lock(&obj->oo_guard);
1901         LASSERT(inode->i_nlink > 0);
1902         inode->i_nlink--;
1903         cfs_spin_unlock(&obj->oo_guard);
1904         mark_inode_dirty(inode);
1905         LINVRNT(osd_invariant(obj));
1906 }
1907
1908 /*
1909  * Concurrency: @dt is read locked.
1910  */
1911 static int osd_xattr_get(const struct lu_env *env,
1912                          struct dt_object *dt,
1913                          struct lu_buf *buf,
1914                          const char *name,
1915                          struct lustre_capa *capa)
1916 {
1917         struct osd_object      *obj    = osd_dt_obj(dt);
1918         struct inode           *inode  = obj->oo_inode;
1919         struct osd_thread_info *info   = osd_oti_get(env);
1920         struct dentry          *dentry = &info->oti_obj_dentry;
1921
1922         LASSERT(dt_object_exists(dt));
1923         LASSERT(inode->i_op != NULL && inode->i_op->getxattr != NULL);
1924         LASSERT(osd_read_locked(env, obj) || osd_write_locked(env, obj));
1925
1926         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1927                 return -EACCES;
1928
1929         dentry->d_inode = inode;
1930         return inode->i_op->getxattr(dentry, name, buf->lb_buf, buf->lb_len);
1931 }
1932
1933 /*
1934  * Concurrency: @dt is write locked.
1935  */
1936 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
1937                          const struct lu_buf *buf, const char *name, int fl,
1938                          struct thandle *handle, struct lustre_capa *capa)
1939 {
1940         LASSERT(handle != NULL);
1941
1942         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1943                 return -EACCES;
1944
1945         return __osd_xattr_set(env, dt, buf, name, fl);
1946 }
1947
1948 /*
1949  * Concurrency: @dt is read locked.
1950  */
1951 static int osd_xattr_list(const struct lu_env *env,
1952                           struct dt_object *dt,
1953                           struct lu_buf *buf,
1954                           struct lustre_capa *capa)
1955 {
1956         struct osd_object      *obj    = osd_dt_obj(dt);
1957         struct inode           *inode  = obj->oo_inode;
1958         struct osd_thread_info *info   = osd_oti_get(env);
1959         struct dentry          *dentry = &info->oti_obj_dentry;
1960
1961         LASSERT(dt_object_exists(dt));
1962         LASSERT(inode->i_op != NULL && inode->i_op->listxattr != NULL);
1963         LASSERT(osd_read_locked(env, obj) || osd_write_locked(env, obj));
1964
1965         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1966                 return -EACCES;
1967
1968         dentry->d_inode = inode;
1969         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
1970 }
1971
1972 /*
1973  * Concurrency: @dt is write locked.
1974  */
1975 static int osd_xattr_del(const struct lu_env *env,
1976                          struct dt_object *dt,
1977                          const char *name,
1978                          struct thandle *handle,
1979                          struct lustre_capa *capa)
1980 {
1981         struct osd_object      *obj    = osd_dt_obj(dt);
1982         struct inode           *inode  = obj->oo_inode;
1983         struct osd_thread_info *info   = osd_oti_get(env);
1984         struct dentry          *dentry = &info->oti_obj_dentry;
1985         struct timespec        *t      = &info->oti_time;
1986         int                     rc;
1987
1988         LASSERT(dt_object_exists(dt));
1989         LASSERT(inode->i_op != NULL && inode->i_op->removexattr != NULL);
1990         LASSERT(osd_write_locked(env, obj));
1991         LASSERT(handle != NULL);
1992
1993         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1994                 return -EACCES;
1995
1996         dentry->d_inode = inode;
1997         *t = inode->i_ctime;
1998         rc = inode->i_op->removexattr(dentry, name);
1999         /* ctime should not be updated with server-side time. */
2000         cfs_spin_lock(&obj->oo_guard);
2001         inode->i_ctime = *t;
2002         cfs_spin_unlock(&obj->oo_guard);
2003         mark_inode_dirty(inode);
2004         return rc;
2005 }
2006
2007 static struct obd_capa *osd_capa_get(const struct lu_env *env,
2008                                      struct dt_object *dt,
2009                                      struct lustre_capa *old,
2010                                      __u64 opc)
2011 {
2012         struct osd_thread_info *info = osd_oti_get(env);
2013         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
2014         struct osd_object *obj = osd_dt_obj(dt);
2015         struct osd_device *dev = osd_obj2dev(obj);
2016         struct lustre_capa_key *key = &info->oti_capa_key;
2017         struct lustre_capa *capa = &info->oti_capa;
2018         struct obd_capa *oc;
2019         struct md_capainfo *ci;
2020         int rc;
2021         ENTRY;
2022
2023         if (!dev->od_fl_capa)
2024                 RETURN(ERR_PTR(-ENOENT));
2025
2026         LASSERT(dt_object_exists(dt));
2027         LINVRNT(osd_invariant(obj));
2028
2029         /* renewal sanity check */
2030         if (old && osd_object_auth(env, dt, old, opc))
2031                 RETURN(ERR_PTR(-EACCES));
2032
2033         ci = md_capainfo(env);
2034         if (unlikely(!ci))
2035                 RETURN(ERR_PTR(-ENOENT));
2036
2037         switch (ci->mc_auth) {
2038         case LC_ID_NONE:
2039                 RETURN(NULL);
2040         case LC_ID_PLAIN:
2041                 capa->lc_uid = obj->oo_inode->i_uid;
2042                 capa->lc_gid = obj->oo_inode->i_gid;
2043                 capa->lc_flags = LC_ID_PLAIN;
2044                 break;
2045         case LC_ID_CONVERT: {
2046                 __u32 d[4], s[4];
2047
2048                 s[0] = obj->oo_inode->i_uid;
2049                 ll_get_random_bytes(&(s[1]), sizeof(__u32));
2050                 s[2] = obj->oo_inode->i_gid;
2051                 ll_get_random_bytes(&(s[3]), sizeof(__u32));
2052                 rc = capa_encrypt_id(d, s, key->lk_key, CAPA_HMAC_KEY_MAX_LEN);
2053                 if (unlikely(rc))
2054                         RETURN(ERR_PTR(rc));
2055
2056                 capa->lc_uid   = ((__u64)d[1] << 32) | d[0];
2057                 capa->lc_gid   = ((__u64)d[3] << 32) | d[2];
2058                 capa->lc_flags = LC_ID_CONVERT;
2059                 break;
2060         }
2061         default:
2062                 RETURN(ERR_PTR(-EINVAL));
2063         }
2064
2065         capa->lc_fid = *fid;
2066         capa->lc_opc = opc;
2067         capa->lc_flags |= dev->od_capa_alg << 24;
2068         capa->lc_timeout = dev->od_capa_timeout;
2069         capa->lc_expiry = 0;
2070
2071         oc = capa_lookup(dev->od_capa_hash, capa, 1);
2072         if (oc) {
2073                 LASSERT(!capa_is_expired(oc));
2074                 RETURN(oc);
2075         }
2076
2077         cfs_spin_lock(&capa_lock);
2078         *key = dev->od_capa_keys[1];
2079         cfs_spin_unlock(&capa_lock);
2080
2081         capa->lc_keyid = key->lk_keyid;
2082         capa->lc_expiry = cfs_time_current_sec() + dev->od_capa_timeout;
2083
2084         rc = capa_hmac(capa->lc_hmac, capa, key->lk_key);
2085         if (rc) {
2086                 DEBUG_CAPA(D_ERROR, capa, "HMAC failed: %d for", rc);
2087                 RETURN(ERR_PTR(rc));
2088         }
2089
2090         oc = capa_add(dev->od_capa_hash, capa);
2091         RETURN(oc);
2092 }
2093
2094 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt)
2095 {
2096         int rc;
2097         struct osd_object      *obj    = osd_dt_obj(dt);
2098         struct inode           *inode  = obj->oo_inode;
2099         struct osd_thread_info *info   = osd_oti_get(env);
2100         struct dentry          *dentry = &info->oti_obj_dentry;
2101         struct file            *file   = &info->oti_file;
2102         ENTRY;
2103
2104         dentry->d_inode = inode;
2105         file->f_dentry = dentry;
2106         file->f_mapping = inode->i_mapping;
2107         file->f_op = inode->i_fop;
2108         LOCK_INODE_MUTEX(inode);
2109         rc = file->f_op->fsync(file, dentry, 0);
2110         UNLOCK_INODE_MUTEX(inode);
2111         RETURN(rc);
2112 }
2113
2114 /*
2115  * Get the 64-bit version for an inode.
2116  */
2117 static dt_obj_version_t osd_object_version_get(const struct lu_env *env,
2118                                                struct dt_object *dt)
2119 {
2120         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2121
2122         CDEBUG(D_INFO, "Get version "LPX64" for inode %lu\n",
2123                LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2124         return LDISKFS_I(inode)->i_fs_version;
2125 }
2126
2127 /*
2128  * Set the 64-bit version and return the old version.
2129  */
2130 static void osd_object_version_set(const struct lu_env *env, struct dt_object *dt,
2131                                    dt_obj_version_t new_version)
2132 {
2133         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2134
2135         CDEBUG(D_INFO, "Set version "LPX64" (old "LPX64") for inode %lu\n",
2136                new_version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2137         LDISKFS_I(inode)->i_fs_version = new_version;
2138         /** Version is set after all inode operations are finished,
2139          *  so we should mark it dirty here */
2140         inode->i_sb->s_op->dirty_inode(inode);
2141 }
2142
2143 static int osd_data_get(const struct lu_env *env, struct dt_object *dt,
2144                         void **data)
2145 {
2146         struct osd_object *obj = osd_dt_obj(dt);
2147         ENTRY;
2148
2149         *data = (void *)obj->oo_inode;
2150         RETURN(0);
2151 }
2152
2153 /*
2154  * Index operations.
2155  */
2156
2157 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
2158                            const struct dt_index_features *feat)
2159 {
2160         struct iam_descr *descr;
2161
2162         if (osd_object_is_root(o))
2163                 return feat == &dt_directory_features;
2164
2165         LASSERT(o->oo_dir != NULL);
2166
2167         descr = o->oo_dir->od_container.ic_descr;
2168         if (feat == &dt_directory_features) {
2169                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
2170                         return 1;
2171                 else
2172                         return 0;
2173         } else {
2174                 return
2175                         feat->dif_keysize_min <= descr->id_key_size &&
2176                         descr->id_key_size <= feat->dif_keysize_max &&
2177                         feat->dif_recsize_min <= descr->id_rec_size &&
2178                         descr->id_rec_size <= feat->dif_recsize_max &&
2179                         !(feat->dif_flags & (DT_IND_VARKEY |
2180                                              DT_IND_VARREC | DT_IND_NONUNQ)) &&
2181                         ergo(feat->dif_flags & DT_IND_UPDATE,
2182                              1 /* XXX check that object (and file system) is
2183                                 * writable */);
2184         }
2185 }
2186
2187 static int osd_iam_container_init(const struct lu_env *env,
2188                                   struct osd_object *obj,
2189                                   struct osd_directory *dir)
2190 {
2191         int result;
2192         struct iam_container *bag;
2193
2194         bag    = &dir->od_container;
2195         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
2196         if (result == 0) {
2197                 result = iam_container_setup(bag);
2198                 if (result == 0)
2199                         obj->oo_dt.do_index_ops = &osd_index_iam_ops;
2200                 else
2201                         iam_container_fini(bag);
2202         }
2203         return result;
2204 }
2205
2206
2207 /*
2208  * Concurrency: no external locking is necessary.
2209  */
2210 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
2211                          const struct dt_index_features *feat)
2212 {
2213         int result;
2214         int ea_dir = 0;
2215         struct osd_object *obj = osd_dt_obj(dt);
2216         struct osd_device *osd = osd_obj2dev(obj);
2217
2218         LINVRNT(osd_invariant(obj));
2219         LASSERT(dt_object_exists(dt));
2220
2221         if (osd_object_is_root(obj)) {
2222                 dt->do_index_ops = &osd_index_ea_ops;
2223                 result = 0;
2224         } else if (feat == &dt_directory_features && osd->od_iop_mode) {
2225                 dt->do_index_ops = &osd_index_ea_ops;
2226                 if (S_ISDIR(obj->oo_inode->i_mode))
2227                         result = 0;
2228                 else
2229                         result = -ENOTDIR;
2230                 ea_dir = 1;
2231         } else if (!osd_has_index(obj)) {
2232                 struct osd_directory *dir;
2233
2234                 OBD_ALLOC_PTR(dir);
2235                 if (dir != NULL) {
2236
2237                         cfs_spin_lock(&obj->oo_guard);
2238                         if (obj->oo_dir == NULL)
2239                                 obj->oo_dir = dir;
2240                         else
2241                                 /*
2242                                  * Concurrent thread allocated container data.
2243                                  */
2244                                 OBD_FREE_PTR(dir);
2245                         cfs_spin_unlock(&obj->oo_guard);
2246                         /*
2247                          * Now, that we have container data, serialize its
2248                          * initialization.
2249                          */
2250                         cfs_down_write(&obj->oo_ext_idx_sem);
2251                         /*
2252                          * recheck under lock.
2253                          */
2254                         if (!osd_has_index(obj))
2255                                 result = osd_iam_container_init(env, obj, dir);
2256                         else
2257                                 result = 0;
2258                         cfs_up_write(&obj->oo_ext_idx_sem);
2259                 } else
2260                         result = -ENOMEM;
2261         } else
2262                 result = 0;
2263
2264         if (result == 0 && ea_dir == 0) {
2265                 if (!osd_iam_index_probe(env, obj, feat))
2266                         result = -ENOTDIR;
2267         }
2268         LINVRNT(osd_invariant(obj));
2269
2270         return result;
2271 }
2272
2273 static const struct dt_object_operations osd_obj_ops = {
2274         .do_read_lock    = osd_object_read_lock,
2275         .do_write_lock   = osd_object_write_lock,
2276         .do_read_unlock  = osd_object_read_unlock,
2277         .do_write_unlock = osd_object_write_unlock,
2278         .do_write_locked = osd_object_write_locked,
2279         .do_attr_get     = osd_attr_get,
2280         .do_attr_set     = osd_attr_set,
2281         .do_ah_init      = osd_ah_init,
2282         .do_create       = osd_object_create,
2283         .do_index_try    = osd_index_try,
2284         .do_ref_add      = osd_object_ref_add,
2285         .do_ref_del      = osd_object_ref_del,
2286         .do_xattr_get    = osd_xattr_get,
2287         .do_xattr_set    = osd_xattr_set,
2288         .do_xattr_del    = osd_xattr_del,
2289         .do_xattr_list   = osd_xattr_list,
2290         .do_capa_get     = osd_capa_get,
2291         .do_object_sync  = osd_object_sync,
2292         .do_version_get  = osd_object_version_get,
2293         .do_version_set  = osd_object_version_set,
2294         .do_data_get     = osd_data_get,
2295 };
2296
2297 /**
2298  * dt_object_operations for interoperability mode
2299  * (i.e. to run 2.0 mds on 1.8 disk) (b11826)
2300  */
2301 static const struct dt_object_operations osd_obj_ea_ops = {
2302         .do_read_lock    = osd_object_read_lock,
2303         .do_write_lock   = osd_object_write_lock,
2304         .do_read_unlock  = osd_object_read_unlock,
2305         .do_write_unlock = osd_object_write_unlock,
2306         .do_write_locked = osd_object_write_locked,
2307         .do_attr_get     = osd_attr_get,
2308         .do_attr_set     = osd_attr_set,
2309         .do_ah_init      = osd_ah_init,
2310         .do_create       = osd_object_ea_create,
2311         .do_index_try    = osd_index_try,
2312         .do_ref_add      = osd_object_ref_add,
2313         .do_ref_del      = osd_object_ref_del,
2314         .do_xattr_get    = osd_xattr_get,
2315         .do_xattr_set    = osd_xattr_set,
2316         .do_xattr_del    = osd_xattr_del,
2317         .do_xattr_list   = osd_xattr_list,
2318         .do_capa_get     = osd_capa_get,
2319         .do_object_sync  = osd_object_sync,
2320         .do_version_get  = osd_object_version_get,
2321         .do_version_set  = osd_object_version_set,
2322         .do_data_get     = osd_data_get,
2323 };
2324
2325 /*
2326  * Body operations.
2327  */
2328
2329 /*
2330  * XXX: Another layering violation for now.
2331  *
2332  * We don't want to use ->f_op->read methods, because generic file write
2333  *
2334  *         - serializes on ->i_sem, and
2335  *
2336  *         - does a lot of extra work like balance_dirty_pages(),
2337  *
2338  * which doesn't work for globally shared files like /last-received.
2339  */
2340 int fsfilt_ldiskfs_read(struct inode *inode, void *buf, int size, loff_t *offs);
2341 int fsfilt_ldiskfs_write_handle(struct inode *inode, void *buf, int bufsize,
2342                                 loff_t *offs, handle_t *handle);
2343
2344 static ssize_t osd_read(const struct lu_env *env, struct dt_object *dt,
2345                         struct lu_buf *buf, loff_t *pos,
2346                         struct lustre_capa *capa)
2347 {
2348         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2349
2350         if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_READ))
2351                 RETURN(-EACCES);
2352
2353         return fsfilt_ldiskfs_read(inode, buf->lb_buf, buf->lb_len, pos);
2354 }
2355
2356 static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
2357                          const struct lu_buf *buf, loff_t *pos,
2358                          struct thandle *handle, struct lustre_capa *capa,
2359                          int ignore_quota)
2360 {
2361         struct inode       *inode = osd_dt_obj(dt)->oo_inode;
2362         struct osd_thandle *oh;
2363         ssize_t             result;
2364 #ifdef HAVE_QUOTA_SUPPORT
2365         cfs_cap_t           save = current->cap_effective;
2366 #endif
2367
2368         LASSERT(handle != NULL);
2369
2370         if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_WRITE))
2371                 RETURN(-EACCES);
2372
2373         oh = container_of(handle, struct osd_thandle, ot_super);
2374         LASSERT(oh->ot_handle->h_transaction != NULL);
2375 #ifdef HAVE_QUOTA_SUPPORT
2376         if (ignore_quota)
2377                 current->cap_effective |= CFS_CAP_SYS_RESOURCE_MASK;
2378         else
2379                 current->cap_effective &= ~CFS_CAP_SYS_RESOURCE_MASK;
2380 #endif
2381         result = fsfilt_ldiskfs_write_handle(inode, buf->lb_buf, buf->lb_len,
2382                                              pos, oh->ot_handle);
2383 #ifdef HAVE_QUOTA_SUPPORT
2384         current->cap_effective = save;
2385 #endif
2386         if (result == 0)
2387                 result = buf->lb_len;
2388         return result;
2389 }
2390
2391 static const struct dt_body_operations osd_body_ops = {
2392         .dbo_read  = osd_read,
2393         .dbo_write = osd_write
2394 };
2395
2396
2397 /**
2398  *      delete a (key, value) pair from index \a dt specified by \a key
2399  *
2400  *      \param  dt      osd index object
2401  *      \param  key     key for index
2402  *      \param  rec     record reference
2403  *      \param  handle  transaction handler
2404  *
2405  *      \retval  0  success
2406  *      \retval -ve   failure
2407  */
2408
2409 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
2410                                 const struct dt_key *key, struct thandle *handle,
2411                                 struct lustre_capa *capa)
2412 {
2413         struct osd_object     *obj = osd_dt_obj(dt);
2414         struct osd_thandle    *oh;
2415         struct iam_path_descr *ipd;
2416         struct iam_container  *bag = &obj->oo_dir->od_container;
2417         int rc;
2418
2419         ENTRY;
2420
2421         LINVRNT(osd_invariant(obj));
2422         LASSERT(dt_object_exists(dt));
2423         LASSERT(bag->ic_object == obj->oo_inode);
2424         LASSERT(handle != NULL);
2425
2426         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
2427                 RETURN(-EACCES);
2428
2429         ipd = osd_idx_ipd_get(env, bag);
2430         if (unlikely(ipd == NULL))
2431                 RETURN(-ENOMEM);
2432
2433         oh = container_of0(handle, struct osd_thandle, ot_super);
2434         LASSERT(oh->ot_handle != NULL);
2435         LASSERT(oh->ot_handle->h_transaction != NULL);
2436
2437         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
2438         osd_ipd_put(env, bag, ipd);
2439         LINVRNT(osd_invariant(obj));
2440         RETURN(rc);
2441 }
2442
2443 /**
2444  * Index delete function for interoperability mode (b11826).
2445  * It will remove the directory entry added by osd_index_ea_insert().
2446  * This entry is needed to maintain name->fid mapping.
2447  *
2448  * \param key,  key i.e. file entry to be deleted
2449  *
2450  * \retval   0, on success
2451  * \retval -ve, on error
2452  */
2453 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
2454                                const struct dt_key *key, struct thandle *handle,
2455                                struct lustre_capa *capa)
2456 {
2457         struct osd_object          *obj    = osd_dt_obj(dt);
2458         struct inode               *dir    = obj->oo_inode;
2459         struct dentry              *dentry;
2460         struct osd_thandle         *oh;
2461         struct ldiskfs_dir_entry_2 *de;
2462         struct buffer_head         *bh;
2463
2464         int rc;
2465
2466         ENTRY;
2467
2468         LINVRNT(osd_invariant(obj));
2469         LASSERT(dt_object_exists(dt));
2470         LASSERT(handle != NULL);
2471
2472         oh = container_of(handle, struct osd_thandle, ot_super);
2473         LASSERT(oh->ot_handle != NULL);
2474         LASSERT(oh->ot_handle->h_transaction != NULL);
2475
2476         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
2477                 RETURN(-EACCES);
2478
2479         dentry = osd_child_dentry_get(env, obj,
2480                                       (char *)key, strlen((char *)key));
2481
2482         cfs_down_write(&obj->oo_ext_idx_sem);
2483         bh = ll_ldiskfs_find_entry(dir, dentry, &de);
2484         if (bh) {
2485                 struct osd_thread_info *oti = osd_oti_get(env);
2486                 struct timespec *ctime = &oti->oti_time;
2487                 struct timespec *mtime = &oti->oti_time2;
2488
2489                 *ctime = dir->i_ctime;
2490                 *mtime = dir->i_mtime;
2491                 rc = ldiskfs_delete_entry(oh->ot_handle,
2492                                 dir, de, bh);
2493                 /* xtime should not be updated with server-side time. */
2494                 cfs_spin_lock(&obj->oo_guard);
2495                 dir->i_ctime = *ctime;
2496                 dir->i_mtime = *mtime;
2497                 cfs_spin_unlock(&obj->oo_guard);
2498                 mark_inode_dirty(dir);
2499                 brelse(bh);
2500         } else
2501                 rc = -ENOENT;
2502
2503         cfs_up_write(&obj->oo_ext_idx_sem);
2504         LASSERT(osd_invariant(obj));
2505         RETURN(rc);
2506 }
2507
2508 /**
2509  *      Lookup index for \a key and copy record to \a rec.
2510  *
2511  *      \param  dt      osd index object
2512  *      \param  key     key for index
2513  *      \param  rec     record reference
2514  *
2515  *      \retval  +ve  success : exact mach
2516  *      \retval  0    return record with key not greater than \a key
2517  *      \retval -ve   failure
2518  */
2519 static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
2520                                 struct dt_rec *rec, const struct dt_key *key,
2521                                 struct lustre_capa *capa)
2522 {
2523         struct osd_object     *obj = osd_dt_obj(dt);
2524         struct iam_path_descr *ipd;
2525         struct iam_container  *bag = &obj->oo_dir->od_container;
2526         struct osd_thread_info *oti = osd_oti_get(env);
2527         struct iam_iterator    *it = &oti->oti_idx_it;
2528         struct iam_rec *iam_rec;
2529         int rc;
2530         ENTRY;
2531
2532         LASSERT(osd_invariant(obj));
2533         LASSERT(dt_object_exists(dt));
2534         LASSERT(bag->ic_object == obj->oo_inode);
2535
2536         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_LOOKUP))
2537                 RETURN(-EACCES);
2538
2539         ipd = osd_idx_ipd_get(env, bag);
2540         if (IS_ERR(ipd))
2541                 RETURN(-ENOMEM);
2542
2543         /* got ipd now we can start iterator. */
2544         iam_it_init(it, bag, 0, ipd);
2545
2546         rc = iam_it_get(it, (struct iam_key *)key);
2547         if (rc >= 0) {
2548                 if (S_ISDIR(obj->oo_inode->i_mode))
2549                         iam_rec = (struct iam_rec *)oti->oti_fid_packed;
2550                 else
2551                         iam_rec = (struct iam_rec *) rec;
2552
2553                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
2554                 if (S_ISDIR(obj->oo_inode->i_mode))
2555                         osd_fid_unpack((struct lu_fid *) rec,
2556                                        (struct osd_fid_pack *)iam_rec);
2557         }
2558         iam_it_put(it);
2559         iam_it_fini(it);
2560         osd_ipd_put(env, bag, ipd);
2561
2562         LINVRNT(osd_invariant(obj));
2563
2564         RETURN(rc);
2565 }
2566
2567 /**
2568  *      Inserts (key, value) pair in \a dt index object.
2569  *
2570  *      \param  dt      osd index object
2571  *      \param  key     key for index
2572  *      \param  rec     record reference
2573  *      \param  th      transaction handler
2574  *
2575  *      \retval  0  success
2576  *      \retval -ve failure
2577  */
2578 static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
2579                                 const struct dt_rec *rec, const struct dt_key *key,
2580                                 struct thandle *th, struct lustre_capa *capa,
2581                                 int ignore_quota)
2582 {
2583         struct osd_object     *obj = osd_dt_obj(dt);
2584         struct iam_path_descr *ipd;
2585         struct osd_thandle    *oh;
2586         struct iam_container  *bag = &obj->oo_dir->od_container;
2587 #ifdef HAVE_QUOTA_SUPPORT
2588         cfs_cap_t              save = current->cap_effective;
2589 #endif
2590         struct osd_thread_info *oti = osd_oti_get(env);
2591         struct iam_rec *iam_rec = (struct iam_rec *)oti->oti_fid_packed;
2592         int rc;
2593
2594         ENTRY;
2595
2596         LINVRNT(osd_invariant(obj));
2597         LASSERT(dt_object_exists(dt));
2598         LASSERT(bag->ic_object == obj->oo_inode);
2599         LASSERT(th != NULL);
2600
2601         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
2602                 return -EACCES;
2603
2604         ipd = osd_idx_ipd_get(env, bag);
2605         if (unlikely(ipd == NULL))
2606                 RETURN(-ENOMEM);
2607
2608         oh = container_of0(th, struct osd_thandle, ot_super);
2609         LASSERT(oh->ot_handle != NULL);
2610         LASSERT(oh->ot_handle->h_transaction != NULL);
2611 #ifdef HAVE_QUOTA_SUPPORT
2612         if (ignore_quota)
2613                 current->cap_effective |= CFS_CAP_SYS_RESOURCE_MASK;
2614         else
2615                 current->cap_effective &= ~CFS_CAP_SYS_RESOURCE_MASK;
2616 #endif
2617         if (S_ISDIR(obj->oo_inode->i_mode))
2618                 osd_fid_pack((struct osd_fid_pack *)iam_rec, rec, &oti->oti_fid);
2619         else
2620                 iam_rec = (struct iam_rec *) rec;
2621         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
2622                         iam_rec, ipd);
2623 #ifdef HAVE_QUOTA_SUPPORT
2624         current->cap_effective = save;
2625 #endif
2626         osd_ipd_put(env, bag, ipd);
2627         LINVRNT(osd_invariant(obj));
2628         RETURN(rc);
2629 }
2630
2631 /**
2632  * Calls ldiskfs_add_entry() to add directory entry
2633  * into the directory. This is required for
2634  * interoperability mode (b11826)
2635  *
2636  * \retval   0, on success
2637  * \retval -ve, on error
2638  */
2639 static int __osd_ea_add_rec(struct osd_thread_info *info,
2640                             struct osd_object *pobj,
2641                             struct osd_object *cobj,
2642                             const char *name,
2643                             struct thandle *th)
2644 {
2645         struct dentry      *child;
2646         struct osd_thandle *oth;
2647         struct inode       *cinode  = cobj->oo_inode;
2648         int rc;
2649
2650         oth = container_of(th, struct osd_thandle, ot_super);
2651         LASSERT(oth->ot_handle != NULL);
2652         LASSERT(oth->ot_handle->h_transaction != NULL);
2653
2654         child = osd_child_dentry_get(info->oti_env, pobj, name, strlen(name));
2655         rc = ldiskfs_add_entry(oth->ot_handle, child, cinode);
2656
2657         RETURN(rc);
2658 }
2659
2660 /**
2661  * Calls ldiskfs_add_dot_dotdot() to add dot and dotdot entries
2662  * into the directory.Also sets flags into osd object to
2663  * indicate dot and dotdot are created. This is required for
2664  * interoperability mode (b11826)
2665  *
2666  * \param dir   directory for dot and dotdot fixup.
2667  * \param obj   child object for linking
2668  *
2669  * \retval   0, on success
2670  * \retval -ve, on error
2671  */
2672 static int osd_add_dot_dotdot(struct osd_thread_info *info,
2673                               struct osd_object *dir,
2674                               struct osd_object *obj, const char *name,
2675                               struct thandle *th)
2676 {
2677         struct inode            *parent_dir   = obj->oo_inode;
2678         struct inode            *inode  = dir->oo_inode;
2679         struct osd_thandle      *oth;
2680         int result = 0;
2681
2682         oth = container_of(th, struct osd_thandle, ot_super);
2683         LASSERT(oth->ot_handle->h_transaction != NULL);
2684         LASSERT(S_ISDIR(dir->oo_inode->i_mode));
2685
2686         if (strcmp(name, dot) == 0) {
2687                 if (dir->oo_compat_dot_created) {
2688                         result = -EEXIST;
2689                 } else {
2690                         LASSERT(obj == dir);
2691                         dir->oo_compat_dot_created = 1;
2692                         result = 0;
2693                 }
2694         } else if(strcmp(name, dotdot) == 0) {
2695                 if (!dir->oo_compat_dot_created)
2696                         return -EINVAL;
2697                 if (dir->oo_compat_dotdot_created)
2698                         return __osd_ea_add_rec(info, dir, obj, name, th);
2699
2700                 result = ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir, inode);
2701                 if (result == 0)
2702                        dir->oo_compat_dotdot_created = 1;
2703         }
2704
2705         return result;
2706 }
2707
2708
2709 /**
2710  * It will call the appropriate osd_add* function and return the
2711  * value, return by respective functions.
2712  */
2713 static int osd_ea_add_rec(const struct lu_env *env,
2714                           struct osd_object *pobj,
2715                           struct osd_object *cobj,
2716                           const char *name,
2717                           struct thandle *th)
2718 {
2719         struct osd_thread_info    *info   = osd_oti_get(env);
2720         int rc;
2721
2722         if (name[0] == '.' && (name[1] == '\0' || (name[1] == '.' &&
2723                                                    name[2] =='\0')))
2724                 rc = osd_add_dot_dotdot(info, pobj, cobj, name, th);
2725         else
2726                 rc = __osd_ea_add_rec(info, pobj, cobj, name, th);
2727
2728         return rc;
2729 }
2730
2731 /**
2732  * Calls ->lookup() to find dentry. From dentry get inode and
2733  * read inode's ea to get fid. This is required for  interoperability
2734  * mode (b11826)
2735  *
2736  * \retval   0, on success
2737  * \retval -ve, on error
2738  */
2739 static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
2740                              struct dt_rec *rec, const struct dt_key *key)
2741 {
2742         struct inode               *dir    = obj->oo_inode;
2743         struct dentry              *dentry;
2744         struct ldiskfs_dir_entry_2 *de;
2745         struct buffer_head         *bh;
2746         struct lu_fid              *fid = (struct lu_fid *) rec;
2747         int ino;
2748         int rc;
2749
2750         LASSERT(dir->i_op != NULL && dir->i_op->lookup != NULL);
2751
2752         dentry = osd_child_dentry_get(env, obj,
2753                                       (char *)key, strlen((char *)key));
2754
2755         cfs_down_read(&obj->oo_ext_idx_sem);
2756         bh = ll_ldiskfs_find_entry(dir, dentry, &de);
2757         if (bh) {
2758                 ino = le32_to_cpu(de->inode);
2759                 brelse(bh);
2760                 rc = osd_ea_fid_get(env, obj, ino, fid);
2761         } else
2762                 rc = -ENOENT;
2763
2764         cfs_up_read(&obj->oo_ext_idx_sem);
2765         RETURN (rc);
2766 }
2767
2768 /**
2769  * Find the osd object for given fid.
2770  *
2771  * \param fid need to find the osd object having this fid
2772  *
2773  * \retval osd_object on success
2774  * \retval        -ve on error
2775  */
2776 struct osd_object *osd_object_find(const struct lu_env *env,
2777                                    struct dt_object *dt,
2778                                    const struct lu_fid *fid)
2779 {
2780         struct lu_device         *ludev = dt->do_lu.lo_dev;
2781         struct osd_object        *child = NULL;
2782         struct lu_object         *luch;
2783         struct lu_object         *lo;
2784
2785         luch = lu_object_find(env, ludev, fid, NULL);
2786         if (!IS_ERR(luch)) {
2787                 if (lu_object_exists(luch)) {
2788                         lo = lu_object_locate(luch->lo_header, ludev->ld_type);
2789                         if (lo != NULL)
2790                                 child = osd_obj(lo);
2791                         else
2792                                 LU_OBJECT_DEBUG(D_ERROR, env, luch,
2793                                                 "lu_object can't be located"
2794                                                 ""DFID"\n", PFID(fid));
2795
2796                         if (child == NULL) {
2797                                 lu_object_put(env, luch);
2798                                 CERROR("Unable to get osd_object\n");
2799                                 child = ERR_PTR(-ENOENT);
2800                         }
2801                 } else {
2802                         LU_OBJECT_DEBUG(D_ERROR, env, luch,
2803                                         "lu_object does not exists "DFID"\n",
2804                                         PFID(fid));
2805                         child = ERR_PTR(-ENOENT);
2806                 }
2807         } else
2808                 child = (void *)luch;
2809
2810         return child;
2811 }
2812
2813 /**
2814  * Put the osd object once done with it.
2815  *
2816  * \param obj osd object that needs to be put
2817  */
2818 static inline void osd_object_put(const struct lu_env *env,
2819                                   struct osd_object *obj)
2820 {
2821         lu_object_put(env, &obj->oo_dt.do_lu);
2822 }
2823
2824 /**
2825  * Index add function for interoperability mode (b11826).
2826  * It will add the directory entry.This entry is needed to
2827  * maintain name->fid mapping.
2828  *
2829  * \param key it is key i.e. file entry to be inserted
2830  * \param rec it is value of given key i.e. fid
2831  *
2832  * \retval   0, on success
2833  * \retval -ve, on error
2834  */
2835 static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
2836                                const struct dt_rec *rec,
2837                                const struct dt_key *key, struct thandle *th,
2838                                struct lustre_capa *capa, int ignore_quota)
2839 {
2840         struct osd_object        *obj   = osd_dt_obj(dt);
2841         struct lu_fid            *fid   = (struct lu_fid *) rec;
2842         const char               *name  = (const char *)key;
2843         struct osd_object        *child;
2844 #ifdef HAVE_QUOTA_SUPPORT
2845         cfs_cap_t                 save  = current->cap_effective;
2846 #endif
2847         int rc;
2848
2849         ENTRY;
2850
2851         LASSERT(osd_invariant(obj));
2852         LASSERT(dt_object_exists(dt));
2853         LASSERT(th != NULL);
2854
2855         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
2856                 RETURN(-EACCES);
2857
2858         child = osd_object_find(env, dt, fid);
2859         if (!IS_ERR(child)) {
2860                 struct inode *inode = obj->oo_inode;
2861                 struct osd_thread_info *oti = osd_oti_get(env);
2862                 struct timespec *ctime = &oti->oti_time;
2863                 struct timespec *mtime = &oti->oti_time2;
2864
2865                 *ctime = inode->i_ctime;
2866                 *mtime = inode->i_mtime;
2867 #ifdef HAVE_QUOTA_SUPPORT
2868                 if (ignore_quota)
2869                         current->cap_effective |= CFS_CAP_SYS_RESOURCE_MASK;
2870                 else
2871                         current->cap_effective &= ~CFS_CAP_SYS_RESOURCE_MASK;
2872 #endif
2873                 cfs_down_write(&obj->oo_ext_idx_sem);
2874                 rc = osd_ea_add_rec(env, obj, child, name, th);
2875                 cfs_up_write(&obj->oo_ext_idx_sem);
2876 #ifdef HAVE_QUOTA_SUPPORT
2877                 current->cap_effective = save;
2878 #endif
2879                 osd_object_put(env, child);
2880                 /* xtime should not be updated with server-side time. */
2881                 cfs_spin_lock(&obj->oo_guard);
2882                 inode->i_ctime = *ctime;
2883                 inode->i_mtime = *mtime;
2884                 cfs_spin_unlock(&obj->oo_guard);
2885                 mark_inode_dirty(inode);
2886         } else {
2887                 rc = PTR_ERR(child);
2888         }
2889
2890         LASSERT(osd_invariant(obj));
2891         RETURN(rc);
2892 }
2893
2894 /**
2895  *  Initialize osd Iterator for given osd index object.
2896  *
2897  *  \param  dt      osd index object
2898  */
2899
2900 static struct dt_it *osd_it_iam_init(const struct lu_env *env,
2901                                  struct dt_object *dt,
2902                                  struct lustre_capa *capa)
2903 {
2904         struct osd_it_iam         *it;
2905         struct osd_thread_info *oti = osd_oti_get(env);
2906         struct osd_object     *obj = osd_dt_obj(dt);
2907         struct lu_object      *lo  = &dt->do_lu;
2908         struct iam_path_descr *ipd;
2909         struct iam_container  *bag = &obj->oo_dir->od_container;
2910
2911         LASSERT(lu_object_exists(lo));
2912
2913         if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_READ))
2914                 return ERR_PTR(-EACCES);
2915
2916         it = &oti->oti_it;
2917         ipd = osd_it_ipd_get(env, bag);
2918         if (likely(ipd != NULL)) {
2919                 it->oi_obj = obj;
2920                 it->oi_ipd = ipd;
2921                 lu_object_get(lo);
2922                 iam_it_init(&it->oi_it, bag, IAM_IT_MOVE, ipd);
2923                 return (struct dt_it *)it;
2924         }
2925         return ERR_PTR(-ENOMEM);
2926 }
2927
2928 /**
2929  * free given Iterator.
2930  */
2931
2932 static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
2933 {
2934         struct osd_it_iam     *it = (struct osd_it_iam *)di;
2935         struct osd_object *obj = it->oi_obj;
2936
2937         iam_it_fini(&it->oi_it);
2938         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
2939         lu_object_put(env, &obj->oo_dt.do_lu);
2940 }
2941
2942 /**
2943  *  Move Iterator to record specified by \a key
2944  *
2945  *  \param  di      osd iterator
2946  *  \param  key     key for index
2947  *
2948  *  \retval +ve  di points to record with least key not larger than key
2949  *  \retval  0   di points to exact matched key
2950  *  \retval -ve  failure
2951  */
2952
2953 static int osd_it_iam_get(const struct lu_env *env,
2954                       struct dt_it *di, const struct dt_key *key)
2955 {
2956         struct osd_it_iam *it = (struct osd_it_iam *)di;
2957
2958         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
2959 }
2960
2961 /**
2962  *  Release Iterator
2963  *
2964  *  \param  di      osd iterator
2965  */
2966
2967 static void osd_it_iam_put(const struct lu_env *env, struct dt_it *di)
2968 {
2969         struct osd_it_iam *it = (struct osd_it_iam *)di;
2970
2971         iam_it_put(&it->oi_it);
2972 }
2973
2974 /**
2975  *  Move iterator by one record
2976  *
2977  *  \param  di      osd iterator
2978  *
2979  *  \retval +1   end of container reached
2980  *  \retval  0   success
2981  *  \retval -ve  failure
2982  */
2983
2984 static int osd_it_iam_next(const struct lu_env *env, struct dt_it *di)
2985 {
2986         struct osd_it_iam *it = (struct osd_it_iam *)di;
2987
2988         return iam_it_next(&it->oi_it);
2989 }
2990
2991 /**
2992  * Return pointer to the key under iterator.
2993  */
2994
2995 static struct dt_key *osd_it_iam_key(const struct lu_env *env,
2996                                  const struct dt_it *di)
2997 {
2998         struct osd_it_iam *it = (struct osd_it_iam *)di;
2999
3000         return (struct dt_key *)iam_it_key_get(&it->oi_it);
3001 }
3002
3003 /**
3004  * Return size of key under iterator (in bytes)
3005  */
3006
3007 static int osd_it_iam_key_size(const struct lu_env *env, const struct dt_it *di)
3008 {
3009         struct osd_it_iam *it = (struct osd_it_iam *)di;
3010
3011         return iam_it_key_size(&it->oi_it);
3012 }
3013
3014 static inline void osd_it_append_attrs(struct lu_dirent*ent,
3015                                        __u32 attr,
3016                                        int len,
3017                                        __u16 type)
3018 {
3019         struct luda_type        *lt;
3020         const unsigned           align = sizeof(struct luda_type) - 1;
3021
3022         /* check if file type is required */
3023         if (attr & LUDA_TYPE) {
3024                         len = (len + align) & ~align;
3025
3026                         lt = (void *) ent->lde_name + len;
3027                         lt->lt_type = cpu_to_le16(CFS_DTTOIF(type));
3028                         ent->lde_attrs |= LUDA_TYPE;
3029         }
3030
3031         ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
3032 }
3033
3034 /**
3035  * build lu direct from backend fs dirent.
3036  */
3037
3038 static inline void osd_it_pack_dirent(struct lu_dirent *ent,
3039                                       struct lu_fid *fid,
3040                                       __u64 offset,
3041                                       char *name,
3042                                       __u16 namelen,
3043                                       __u16 type,
3044                                       __u32 attr)
3045 {
3046         fid_cpu_to_le(&ent->lde_fid, fid);
3047         ent->lde_attrs = LUDA_FID;
3048
3049         ent->lde_hash = cpu_to_le64(offset);
3050         ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
3051
3052         strncpy(ent->lde_name, name, namelen);
3053         ent->lde_namelen = cpu_to_le16(namelen);
3054
3055         /* append lustre attributes */
3056         osd_it_append_attrs(ent, attr, namelen, type);
3057 }
3058
3059 /**
3060  * Return pointer to the record under iterator.
3061  */
3062 static int osd_it_iam_rec(const struct lu_env *env,
3063                           const struct dt_it *di,
3064                           struct lu_dirent *lde,
3065                           __u32 attr)
3066 {
3067         struct osd_it_iam *it        = (struct osd_it_iam *)di;
3068         struct osd_thread_info *info = osd_oti_get(env);
3069         struct lu_fid     *fid       = &info->oti_fid;
3070         const struct osd_fid_pack *rec;
3071         char *name;
3072         int namelen;
3073         __u64 hash;
3074         int rc;
3075
3076         name = (char *)iam_it_key_get(&it->oi_it);
3077         if (IS_ERR(name))
3078                 RETURN(PTR_ERR(name));
3079
3080         namelen = iam_it_key_size(&it->oi_it);
3081
3082         rec = (const struct osd_fid_pack *) iam_it_rec_get(&it->oi_it);
3083         if (IS_ERR(rec))
3084                 RETURN(PTR_ERR(rec));
3085
3086         rc = osd_fid_unpack(fid, rec);
3087         if (rc)
3088                 RETURN(rc);
3089
3090         hash = iam_it_store(&it->oi_it);
3091
3092         /* IAM does not store object type in IAM index (dir) */
3093         osd_it_pack_dirent(lde, fid, hash, name, namelen,
3094                            0, LUDA_FID);
3095
3096         return 0;
3097 }
3098
3099 /**
3100  * Returns cookie for current Iterator position.
3101  */
3102 static __u64 osd_it_iam_store(const struct lu_env *env, const struct dt_it *di)
3103 {
3104         struct osd_it_iam *it = (struct osd_it_iam *)di;
3105
3106         return iam_it_store(&it->oi_it);
3107 }
3108
3109 /**
3110  * Restore iterator from cookie.
3111  *
3112  * \param  di      osd iterator
3113  * \param  hash    Iterator location cookie
3114  *
3115  * \retval +ve  di points to record with least key not larger than key.
3116  * \retval  0   di points to exact matched key
3117  * \retval -ve  failure
3118  */
3119
3120 static int osd_it_iam_load(const struct lu_env *env,
3121                        const struct dt_it *di, __u64 hash)
3122 {
3123         struct osd_it_iam *it = (struct osd_it_iam *)di;
3124
3125         return iam_it_load(&it->oi_it, hash);
3126 }
3127
3128 static const struct dt_index_operations osd_index_iam_ops = {
3129         .dio_lookup = osd_index_iam_lookup,
3130         .dio_insert = osd_index_iam_insert,
3131         .dio_delete = osd_index_iam_delete,
3132         .dio_it     = {
3133                 .init     = osd_it_iam_init,
3134                 .fini     = osd_it_iam_fini,
3135                 .get      = osd_it_iam_get,
3136                 .put      = osd_it_iam_put,
3137                 .next     = osd_it_iam_next,
3138                 .key      = osd_it_iam_key,
3139                 .key_size = osd_it_iam_key_size,
3140                 .rec      = osd_it_iam_rec,
3141                 .store    = osd_it_iam_store,
3142                 .load     = osd_it_iam_load
3143         }
3144 };
3145
3146 /**
3147  * Creates or initializes iterator context.
3148  *
3149  * \retval struct osd_it_ea, iterator structure on success
3150  *
3151  */
3152 static struct dt_it *osd_it_ea_init(const struct lu_env *env,
3153                                     struct dt_object *dt,
3154                                     struct lustre_capa *capa)
3155 {
3156         struct osd_object       *obj  = osd_dt_obj(dt);
3157         struct osd_thread_info  *info = osd_oti_get(env);
3158         struct osd_it_ea        *it   = &info->oti_it_ea;
3159         struct lu_object        *lo   = &dt->do_lu;
3160         struct dentry           *obj_dentry = &info->oti_it_dentry;
3161         ENTRY;
3162         LASSERT(lu_object_exists(lo));
3163
3164         obj_dentry->d_inode = obj->oo_inode;
3165         obj_dentry->d_sb = osd_sb(osd_obj2dev(obj));
3166         obj_dentry->d_name.hash = 0;
3167
3168         it->oie_rd_dirent       = 0;
3169         it->oie_it_dirent       = 0;
3170         it->oie_dirent          = NULL;
3171         it->oie_buf             = info->oti_it_ea_buf;
3172         it->oie_obj             = obj;
3173         it->oie_file.f_pos      = 0;
3174         it->oie_file.f_dentry   = obj_dentry;
3175         it->oie_file.f_mapping    = obj->oo_inode->i_mapping;
3176         it->oie_file.f_op         = obj->oo_inode->i_fop;
3177         it->oie_file.private_data = NULL;
3178         lu_object_get(lo);
3179         RETURN((struct dt_it *) it);
3180 }
3181
3182 /**
3183  * Destroy or finishes iterator context.
3184  *
3185  * \param di iterator structure to be destroyed
3186  */
3187 static void osd_it_ea_fini(const struct lu_env *env, struct dt_it *di)
3188 {
3189         struct osd_it_ea     *it   = (struct osd_it_ea *)di;
3190         struct osd_object    *obj  = it->oie_obj;
3191         struct inode       *inode  = obj->oo_inode;
3192
3193         ENTRY;
3194         it->oie_file.f_op->release(inode, &it->oie_file);
3195         lu_object_put(env, &obj->oo_dt.do_lu);
3196         EXIT;
3197 }
3198
3199 /**
3200  * It position the iterator at given key, so that next lookup continues from
3201  * that key Or it is similar to dio_it->load() but based on a key,
3202  * rather than file position.
3203  *
3204  * As a special convention, osd_it_ea_get(env, di, "") has to rewind iterator
3205  * to the beginning.
3206  *
3207  * TODO: Presently return +1 considering it is only used by mdd_dir_is_empty().
3208  */
3209 static int osd_it_ea_get(const struct lu_env *env,
3210                          struct dt_it *di, const struct dt_key *key)
3211 {
3212         struct osd_it_ea     *it   = (struct osd_it_ea *)di;
3213
3214         ENTRY;
3215         LASSERT(((const char *)key)[0] == '\0');
3216         it->oie_file.f_pos      = 0;
3217         it->oie_rd_dirent       = 0;
3218         it->oie_it_dirent       = 0;
3219         it->oie_dirent          = NULL;
3220
3221         RETURN(+1);
3222 }
3223
3224 /**
3225  * Does nothing
3226  */
3227 static void osd_it_ea_put(const struct lu_env *env, struct dt_it *di)
3228 {
3229 }
3230
3231 /**
3232  * It is called internally by ->readdir(). It fills the
3233  * iterator's in-memory data structure with required
3234  * information i.e. name, namelen, rec_size etc.
3235  *
3236  * \param buf in which information to be filled in.
3237  * \param name name of the file in given dir
3238  *
3239  * \retval 0 on success
3240  * \retval 1 on buffer full
3241  */
3242 static int osd_ldiskfs_filldir(char *buf, const char *name, int namelen,
3243                                loff_t offset, __u64 ino,
3244                                unsigned d_type)
3245 {
3246         struct osd_it_ea        *it = (struct osd_it_ea *)buf;
3247         struct osd_it_ea_dirent *ent = it->oie_dirent;
3248         ENTRY;
3249
3250         /* this should never happen */
3251         if (unlikely(namelen == 0 || namelen > LDISKFS_NAME_LEN)) {
3252                 CERROR("ldiskfs return invalid namelen %d\n", namelen);
3253                 RETURN(-EIO);
3254         }
3255
3256         if ((void *) ent - it->oie_buf + sizeof(*ent) + namelen >
3257             OSD_IT_EA_BUFSIZE)
3258                 RETURN(1);
3259
3260         ent->oied_ino     = ino;
3261         ent->oied_off     = offset;
3262         ent->oied_namelen = namelen;
3263         ent->oied_type    = d_type;
3264
3265         memcpy(ent->oied_name, name, namelen);
3266
3267         it->oie_rd_dirent++;
3268         it->oie_dirent = (void *) ent + cfs_size_round(sizeof(*ent) + namelen);
3269         RETURN(0);
3270 }
3271
3272 /**
3273  * Calls ->readdir() to load a directory entry at a time
3274  * and stored it in iterator's in-memory data structure.
3275  *
3276  * \param di iterator's in memory structure
3277  *
3278  * \retval   0 on success
3279  * \retval -ve on error
3280  */
3281 static int osd_ldiskfs_it_fill(const struct dt_it *di)
3282 {
3283         struct osd_it_ea   *it    = (struct osd_it_ea *)di;
3284         struct osd_object  *obj   = it->oie_obj;
3285         struct inode       *inode = obj->oo_inode;
3286         int                result = 0;
3287
3288         ENTRY;
3289         it->oie_dirent = it->oie_buf;
3290         it->oie_rd_dirent = 0;
3291
3292         cfs_down_read(&obj->oo_ext_idx_sem);
3293         result = inode->i_fop->readdir(&it->oie_file, it,
3294                                        (filldir_t) osd_ldiskfs_filldir);
3295
3296         cfs_up_read(&obj->oo_ext_idx_sem);
3297
3298         if (it->oie_rd_dirent == 0) {
3299                 result = -EIO;
3300         } else {
3301                 it->oie_dirent = it->oie_buf;
3302                 it->oie_it_dirent = 1;
3303         }
3304
3305         RETURN(result);
3306 }
3307
3308 /**
3309  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
3310  * to load a directory entry at a time and stored it in
3311  * iterator's in-memory data structure.
3312  *
3313  * \param di iterator's in memory structure
3314  *
3315  * \retval +ve iterator reached to end
3316  * \retval   0 iterator not reached to end
3317  * \retval -ve on error
3318  */
3319 static int osd_it_ea_next(const struct lu_env *env, struct dt_it *di)
3320 {
3321         struct osd_it_ea *it = (struct osd_it_ea *)di;
3322         int rc;
3323
3324         ENTRY;
3325
3326         if (it->oie_it_dirent < it->oie_rd_dirent) {
3327                 it->oie_dirent =
3328                         (void *) it->oie_dirent +
3329                         cfs_size_round(sizeof(struct osd_it_ea_dirent) +
3330                                        it->oie_dirent->oied_namelen);
3331                 it->oie_it_dirent++;
3332                 RETURN(0);
3333         } else {
3334                 if (it->oie_file.f_pos == LDISKFS_HTREE_EOF)
3335                         rc = +1;
3336                 else
3337                         rc = osd_ldiskfs_it_fill(di);
3338         }
3339
3340         RETURN(rc);
3341 }
3342
3343 /**
3344  * Returns the key at current position from iterator's in memory structure.
3345  *
3346  * \param di iterator's in memory structure
3347  *
3348  * \retval key i.e. struct dt_key on success
3349  */
3350 static struct dt_key *osd_it_ea_key(const struct lu_env *env,
3351                                     const struct dt_it *di)
3352 {
3353         struct osd_it_ea *it = (struct osd_it_ea *)di;
3354         ENTRY;
3355         RETURN((struct dt_key *)it->oie_dirent->oied_name);
3356 }
3357
3358 /**
3359  * Returns the key's size at current position from iterator's in memory structure.
3360  *
3361  * \param di iterator's in memory structure
3362  *
3363  * \retval key_size i.e. struct dt_key on success
3364  */
3365 static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
3366 {
3367         struct osd_it_ea *it = (struct osd_it_ea *)di;
3368         ENTRY;
3369         RETURN(it->oie_dirent->oied_namelen);
3370 }
3371
3372
3373 /**
3374  * Returns the value (i.e. fid/igif) at current position from iterator's
3375  * in memory structure.
3376  *
3377  * \param di struct osd_it_ea, iterator's in memory structure
3378  * \param attr attr requested for dirent.
3379  * \param lde lustre dirent
3380  *
3381  * \retval   0 no error and \param lde has correct lustre dirent.
3382  * \retval -ve on error
3383  */
3384 static inline int osd_it_ea_rec(const struct lu_env *env,
3385                                 const struct dt_it *di,
3386                                 struct lu_dirent *lde,
3387                                 __u32 attr)
3388 {
3389         struct osd_it_ea        *it     = (struct osd_it_ea *)di;
3390         struct osd_object       *obj    = it->oie_obj;
3391         struct osd_thread_info  *info   = osd_oti_get(env);
3392         struct lu_fid           *fid       = &info->oti_fid;
3393         int                      rc;
3394
3395         ENTRY;
3396
3397         rc = osd_ea_fid_get(env, obj, it->oie_dirent->oied_ino, fid);
3398
3399         if (rc == 0)
3400                 osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
3401                                    it->oie_dirent->oied_name,
3402                                    it->oie_dirent->oied_namelen,
3403                                    it->oie_dirent->oied_type,
3404                                    attr);
3405         RETURN(rc);
3406 }
3407