4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License version 2 for more details. A copy is
14 * included in the COPYING file that accompanied this code.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2017, Intel Corporation.
29 * lustre/lod/lod_object.c
31 * This file contains implementations of methods for the OSD API
32 * for the Logical Object Device (LOD) layer, which provides a virtual
33 * local OSD object interface to the MDD layer, and abstracts the
34 * addressing of local (OSD) and remote (OSP) objects. The API is
35 * described in the file lustre/include/dt_object.h and in
36 * Documentation/osd-api.txt.
38 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
41 #define DEBUG_SUBSYSTEM S_MDS
43 #include <linux/random.h>
46 #include <obd_class.h>
47 #include <obd_support.h>
49 #include <lustre_fid.h>
50 #include <lustre_linkea.h>
51 #include <lustre_lmv.h>
52 #include <uapi/linux/lustre/lustre_param.h>
53 #include <lustre_swab.h>
54 #include <uapi/linux/lustre/lustre_ver.h>
55 #include <lprocfs_status.h>
56 #include <md_object.h>
58 #include "lod_internal.h"
60 static const char dot[] = ".";
61 static const char dotdot[] = "..";
64 * Implementation of dt_index_operations::dio_lookup
66 * Used with regular (non-striped) objects.
68 * \see dt_index_operations::dio_lookup() in the API description for details.
70 static int lod_lookup(const struct lu_env *env, struct dt_object *dt,
71 struct dt_rec *rec, const struct dt_key *key)
73 struct dt_object *next = dt_object_child(dt);
74 return next->do_index_ops->dio_lookup(env, next, rec, key);
78 * Implementation of dt_index_operations::dio_declare_insert.
80 * Used with regular (non-striped) objects.
82 * \see dt_index_operations::dio_declare_insert() in the API description
85 static int lod_declare_insert(const struct lu_env *env, struct dt_object *dt,
86 const struct dt_rec *rec,
87 const struct dt_key *key, struct thandle *th)
89 return lod_sub_declare_insert(env, dt_object_child(dt), rec, key, th);
93 * Implementation of dt_index_operations::dio_insert.
95 * Used with regular (non-striped) objects
97 * \see dt_index_operations::dio_insert() in the API description for details.
99 static int lod_insert(const struct lu_env *env, struct dt_object *dt,
100 const struct dt_rec *rec, const struct dt_key *key,
103 return lod_sub_insert(env, dt_object_child(dt), rec, key, th);
107 * Implementation of dt_index_operations::dio_declare_delete.
109 * Used with regular (non-striped) objects.
111 * \see dt_index_operations::dio_declare_delete() in the API description
114 static int lod_declare_delete(const struct lu_env *env, struct dt_object *dt,
115 const struct dt_key *key, struct thandle *th)
117 return lod_sub_declare_delete(env, dt_object_child(dt), key, th);
121 * Implementation of dt_index_operations::dio_delete.
123 * Used with regular (non-striped) objects.
125 * \see dt_index_operations::dio_delete() in the API description for details.
127 static int lod_delete(const struct lu_env *env, struct dt_object *dt,
128 const struct dt_key *key, struct thandle *th)
130 return lod_sub_delete(env, dt_object_child(dt), key, th);
134 * Implementation of dt_it_ops::init.
136 * Used with regular (non-striped) objects.
138 * \see dt_it_ops::init() in the API description for details.
140 static struct dt_it *lod_it_init(const struct lu_env *env,
141 struct dt_object *dt, __u32 attr)
143 struct dt_object *next = dt_object_child(dt);
144 struct lod_it *it = &lod_env_info(env)->lti_it;
145 struct dt_it *it_next;
147 it_next = next->do_index_ops->dio_it.init(env, next, attr);
151 /* currently we do not use more than one iterator per thread
152 * so we store it in thread info. if at some point we need
153 * more active iterators in a single thread, we can allocate
155 LASSERT(it->lit_obj == NULL);
157 it->lit_it = it_next;
160 return (struct dt_it *)it;
163 #define LOD_CHECK_IT(env, it) \
165 LASSERT((it)->lit_obj != NULL); \
166 LASSERT((it)->lit_it != NULL); \
170 * Implementation of dt_index_operations::dio_it.fini.
172 * Used with regular (non-striped) objects.
174 * \see dt_index_operations::dio_it.fini() in the API description for details.
176 static void lod_it_fini(const struct lu_env *env, struct dt_it *di)
178 struct lod_it *it = (struct lod_it *)di;
180 LOD_CHECK_IT(env, it);
181 it->lit_obj->do_index_ops->dio_it.fini(env, it->lit_it);
183 /* the iterator not in use any more */
189 * Implementation of dt_it_ops::get.
191 * Used with regular (non-striped) objects.
193 * \see dt_it_ops::get() in the API description for details.
195 static int lod_it_get(const struct lu_env *env, struct dt_it *di,
196 const struct dt_key *key)
198 const struct lod_it *it = (const struct lod_it *)di;
200 LOD_CHECK_IT(env, it);
201 return it->lit_obj->do_index_ops->dio_it.get(env, it->lit_it, key);
205 * Implementation of dt_it_ops::put.
207 * Used with regular (non-striped) objects.
209 * \see dt_it_ops::put() in the API description for details.
211 static void lod_it_put(const struct lu_env *env, struct dt_it *di)
213 struct lod_it *it = (struct lod_it *)di;
215 LOD_CHECK_IT(env, it);
216 return it->lit_obj->do_index_ops->dio_it.put(env, it->lit_it);
220 * Implementation of dt_it_ops::next.
222 * Used with regular (non-striped) objects
224 * \see dt_it_ops::next() in the API description for details.
226 static int lod_it_next(const struct lu_env *env, struct dt_it *di)
228 struct lod_it *it = (struct lod_it *)di;
230 LOD_CHECK_IT(env, it);
231 return it->lit_obj->do_index_ops->dio_it.next(env, it->lit_it);
235 * Implementation of dt_it_ops::key.
237 * Used with regular (non-striped) objects.
239 * \see dt_it_ops::key() in the API description for details.
241 static struct dt_key *lod_it_key(const struct lu_env *env,
242 const struct dt_it *di)
244 const struct lod_it *it = (const struct lod_it *)di;
246 LOD_CHECK_IT(env, it);
247 return it->lit_obj->do_index_ops->dio_it.key(env, it->lit_it);
251 * Implementation of dt_it_ops::key_size.
253 * Used with regular (non-striped) objects.
255 * \see dt_it_ops::key_size() in the API description for details.
257 static int lod_it_key_size(const struct lu_env *env, const struct dt_it *di)
259 struct lod_it *it = (struct lod_it *)di;
261 LOD_CHECK_IT(env, it);
262 return it->lit_obj->do_index_ops->dio_it.key_size(env, it->lit_it);
266 * Implementation of dt_it_ops::rec.
268 * Used with regular (non-striped) objects.
270 * \see dt_it_ops::rec() in the API description for details.
272 static int lod_it_rec(const struct lu_env *env, const struct dt_it *di,
273 struct dt_rec *rec, __u32 attr)
275 const struct lod_it *it = (const struct lod_it *)di;
277 LOD_CHECK_IT(env, it);
278 return it->lit_obj->do_index_ops->dio_it.rec(env, it->lit_it, rec,
283 * Implementation of dt_it_ops::rec_size.
285 * Used with regular (non-striped) objects.
287 * \see dt_it_ops::rec_size() in the API description for details.
289 static int lod_it_rec_size(const struct lu_env *env, const struct dt_it *di,
292 const struct lod_it *it = (const struct lod_it *)di;
294 LOD_CHECK_IT(env, it);
295 return it->lit_obj->do_index_ops->dio_it.rec_size(env, it->lit_it,
300 * Implementation of dt_it_ops::store.
302 * Used with regular (non-striped) objects.
304 * \see dt_it_ops::store() in the API description for details.
306 static __u64 lod_it_store(const struct lu_env *env, const struct dt_it *di)
308 const struct lod_it *it = (const struct lod_it *)di;
310 LOD_CHECK_IT(env, it);
311 return it->lit_obj->do_index_ops->dio_it.store(env, it->lit_it);
315 * Implementation of dt_it_ops::load.
317 * Used with regular (non-striped) objects.
319 * \see dt_it_ops::load() in the API description for details.
321 static int lod_it_load(const struct lu_env *env, const struct dt_it *di,
324 const struct lod_it *it = (const struct lod_it *)di;
326 LOD_CHECK_IT(env, it);
327 return it->lit_obj->do_index_ops->dio_it.load(env, it->lit_it, hash);
331 * Implementation of dt_it_ops::key_rec.
333 * Used with regular (non-striped) objects.
335 * \see dt_it_ops::rec() in the API description for details.
337 static int lod_it_key_rec(const struct lu_env *env, const struct dt_it *di,
340 const struct lod_it *it = (const struct lod_it *)di;
342 LOD_CHECK_IT(env, it);
343 return it->lit_obj->do_index_ops->dio_it.key_rec(env, it->lit_it,
347 static const struct dt_index_operations lod_index_ops = {
348 .dio_lookup = lod_lookup,
349 .dio_declare_insert = lod_declare_insert,
350 .dio_insert = lod_insert,
351 .dio_declare_delete = lod_declare_delete,
352 .dio_delete = lod_delete,
360 .key_size = lod_it_key_size,
362 .rec_size = lod_it_rec_size,
363 .store = lod_it_store,
365 .key_rec = lod_it_key_rec,
370 * Implementation of dt_index_operations::dio_lookup
372 * Used with striped directories.
374 * \see dt_index_operations::dio_lookup() in the API description for details.
376 static int lod_striped_lookup(const struct lu_env *env, struct dt_object *dt,
377 struct dt_rec *rec, const struct dt_key *key)
379 struct lod_object *lo = lod_dt_obj(dt);
380 struct dt_object *next;
381 const char *name = (const char *)key;
383 LASSERT(lo->ldo_dir_stripe_count > 0);
385 if (strcmp(name, dot) == 0) {
386 struct lu_fid *fid = (struct lu_fid *)rec;
388 *fid = *lod_object_fid(lo);
392 if (strcmp(name, dotdot) == 0) {
393 next = dt_object_child(dt);
397 index = __lmv_name_to_stripe_index(lo->ldo_dir_hash_type,
398 lo->ldo_dir_stripe_count,
399 lo->ldo_dir_migrate_hash,
400 lo->ldo_dir_migrate_offset,
401 name, strlen(name), true);
405 next = lo->ldo_stripe[index];
406 if (!next || !dt_object_exists(next))
410 return next->do_index_ops->dio_lookup(env, next, rec, key);
414 * Implementation of dt_it_ops::init.
416 * Used with striped objects. Internally just initializes the iterator
417 * on the first stripe.
419 * \see dt_it_ops::init() in the API description for details.
421 static struct dt_it *lod_striped_it_init(const struct lu_env *env,
422 struct dt_object *dt, __u32 attr)
424 struct lod_object *lo = lod_dt_obj(dt);
425 struct dt_object *next;
426 struct lod_it *it = &lod_env_info(env)->lti_it;
427 struct dt_it *it_next;
430 LASSERT(lo->ldo_dir_stripe_count > 0);
433 next = lo->ldo_stripe[index];
434 if (next && dt_object_exists(next))
436 } while (++index < lo->ldo_dir_stripe_count);
438 /* no valid stripe */
439 if (!next || !dt_object_exists(next))
440 return ERR_PTR(-ENODEV);
442 LASSERT(next->do_index_ops != NULL);
444 it_next = next->do_index_ops->dio_it.init(env, next, attr);
448 /* currently we do not use more than one iterator per thread
449 * so we store it in thread info. if at some point we need
450 * more active iterators in a single thread, we can allocate
452 LASSERT(it->lit_obj == NULL);
454 it->lit_stripe_index = index;
456 it->lit_it = it_next;
459 return (struct dt_it *)it;
462 #define LOD_CHECK_STRIPED_IT(env, it, lo) \
464 LASSERT((it)->lit_obj != NULL); \
465 LASSERT((it)->lit_it != NULL); \
466 LASSERT((lo)->ldo_dir_stripe_count > 0); \
467 LASSERT((it)->lit_stripe_index < (lo)->ldo_dir_stripe_count); \
471 * Implementation of dt_it_ops::fini.
473 * Used with striped objects.
475 * \see dt_it_ops::fini() in the API description for details.
477 static void lod_striped_it_fini(const struct lu_env *env, struct dt_it *di)
479 struct lod_it *it = (struct lod_it *)di;
480 struct lod_object *lo = lod_dt_obj(it->lit_obj);
481 struct dt_object *next;
483 /* If lit_it == NULL, then it means the sub_it has been finished,
484 * which only happens in failure cases, see lod_striped_it_next() */
485 if (it->lit_it != NULL) {
486 LOD_CHECK_STRIPED_IT(env, it, lo);
488 next = lo->ldo_stripe[it->lit_stripe_index];
490 LASSERT(next->do_index_ops != NULL);
491 next->do_index_ops->dio_it.fini(env, it->lit_it);
495 /* the iterator not in use any more */
498 it->lit_stripe_index = 0;
502 * Implementation of dt_it_ops::get.
504 * Right now it's not used widely, only to reset the iterator to the
505 * initial position. It should be possible to implement a full version
506 * which chooses a correct stripe to be able to position with any key.
508 * \see dt_it_ops::get() in the API description for details.
510 static int lod_striped_it_get(const struct lu_env *env, struct dt_it *di,
511 const struct dt_key *key)
513 const struct lod_it *it = (const struct lod_it *)di;
514 struct lod_object *lo = lod_dt_obj(it->lit_obj);
515 struct dt_object *next;
517 LOD_CHECK_STRIPED_IT(env, it, lo);
519 next = lo->ldo_stripe[it->lit_stripe_index];
520 LASSERT(next != NULL);
521 LASSERT(dt_object_exists(next));
522 LASSERT(next->do_index_ops != NULL);
524 return next->do_index_ops->dio_it.get(env, it->lit_it, key);
528 * Implementation of dt_it_ops::put.
530 * Used with striped objects.
532 * \see dt_it_ops::put() in the API description for details.
534 static void lod_striped_it_put(const struct lu_env *env, struct dt_it *di)
536 struct lod_it *it = (struct lod_it *)di;
537 struct lod_object *lo = lod_dt_obj(it->lit_obj);
538 struct dt_object *next;
541 * If lit_it == NULL, then it means the sub_it has been finished,
542 * which only happens in failure cases, see lod_striped_it_next()
547 LOD_CHECK_STRIPED_IT(env, it, lo);
549 next = lo->ldo_stripe[it->lit_stripe_index];
550 LASSERT(next != NULL);
551 LASSERT(next->do_index_ops != NULL);
553 return next->do_index_ops->dio_it.put(env, it->lit_it);
557 * Implementation of dt_it_ops::next.
559 * Used with striped objects. When the end of the current stripe is
560 * reached, the method takes the next stripe's iterator.
562 * \see dt_it_ops::next() in the API description for details.
564 static int lod_striped_it_next(const struct lu_env *env, struct dt_it *di)
566 struct lod_it *it = (struct lod_it *)di;
567 struct lod_object *lo = lod_dt_obj(it->lit_obj);
568 struct dt_object *next;
569 struct dt_it *it_next;
575 LOD_CHECK_STRIPED_IT(env, it, lo);
577 next = lo->ldo_stripe[it->lit_stripe_index];
578 LASSERT(next != NULL);
579 LASSERT(dt_object_exists(next));
580 LASSERT(next->do_index_ops != NULL);
582 rc = next->do_index_ops->dio_it.next(env, it->lit_it);
586 if (rc == 0 && it->lit_stripe_index == 0)
589 if (rc == 0 && it->lit_stripe_index > 0) {
590 struct lu_dirent *ent;
592 ent = (struct lu_dirent *)lod_env_info(env)->lti_key;
594 rc = next->do_index_ops->dio_it.rec(env, it->lit_it,
595 (struct dt_rec *)ent,
600 /* skip . and .. for slave stripe */
601 if ((strncmp(ent->lde_name, ".",
602 le16_to_cpu(ent->lde_namelen)) == 0 &&
603 le16_to_cpu(ent->lde_namelen) == 1) ||
604 (strncmp(ent->lde_name, "..",
605 le16_to_cpu(ent->lde_namelen)) == 0 &&
606 le16_to_cpu(ent->lde_namelen) == 2))
612 next->do_index_ops->dio_it.put(env, it->lit_it);
613 next->do_index_ops->dio_it.fini(env, it->lit_it);
616 /* go to next stripe */
617 index = it->lit_stripe_index;
618 while (++index < lo->ldo_dir_stripe_count) {
619 next = lo->ldo_stripe[index];
623 if (!dt_object_exists(next))
626 rc = next->do_ops->do_index_try(env, next,
627 &dt_directory_features);
631 LASSERT(next->do_index_ops != NULL);
633 it_next = next->do_index_ops->dio_it.init(env, next,
636 RETURN(PTR_ERR(it_next));
638 rc = next->do_index_ops->dio_it.get(env, it_next,
639 (const struct dt_key *)"");
641 RETURN(rc == 0 ? -EIO : rc);
643 it->lit_it = it_next;
644 it->lit_stripe_index = index;
653 * Implementation of dt_it_ops::key.
655 * Used with striped objects.
657 * \see dt_it_ops::key() in the API description for details.
659 static struct dt_key *lod_striped_it_key(const struct lu_env *env,
660 const struct dt_it *di)
662 const struct lod_it *it = (const struct lod_it *)di;
663 struct lod_object *lo = lod_dt_obj(it->lit_obj);
664 struct dt_object *next;
666 LOD_CHECK_STRIPED_IT(env, it, lo);
668 next = lo->ldo_stripe[it->lit_stripe_index];
669 LASSERT(next != NULL);
670 LASSERT(next->do_index_ops != NULL);
672 return next->do_index_ops->dio_it.key(env, it->lit_it);
676 * Implementation of dt_it_ops::key_size.
678 * Used with striped objects.
680 * \see dt_it_ops::size() in the API description for details.
682 static int lod_striped_it_key_size(const struct lu_env *env,
683 const struct dt_it *di)
685 struct lod_it *it = (struct lod_it *)di;
686 struct lod_object *lo = lod_dt_obj(it->lit_obj);
687 struct dt_object *next;
689 LOD_CHECK_STRIPED_IT(env, it, lo);
691 next = lo->ldo_stripe[it->lit_stripe_index];
692 LASSERT(next != NULL);
693 LASSERT(next->do_index_ops != NULL);
695 return next->do_index_ops->dio_it.key_size(env, it->lit_it);
699 * Implementation of dt_it_ops::rec.
701 * Used with striped objects.
703 * \see dt_it_ops::rec() in the API description for details.
705 static int lod_striped_it_rec(const struct lu_env *env, const struct dt_it *di,
706 struct dt_rec *rec, __u32 attr)
708 const struct lod_it *it = (const struct lod_it *)di;
709 struct lod_object *lo = lod_dt_obj(it->lit_obj);
710 struct dt_object *next;
712 LOD_CHECK_STRIPED_IT(env, it, lo);
714 next = lo->ldo_stripe[it->lit_stripe_index];
715 LASSERT(next != NULL);
716 LASSERT(next->do_index_ops != NULL);
718 return next->do_index_ops->dio_it.rec(env, it->lit_it, rec, attr);
722 * Implementation of dt_it_ops::rec_size.
724 * Used with striped objects.
726 * \see dt_it_ops::rec_size() in the API description for details.
728 static int lod_striped_it_rec_size(const struct lu_env *env,
729 const struct dt_it *di, __u32 attr)
731 struct lod_it *it = (struct lod_it *)di;
732 struct lod_object *lo = lod_dt_obj(it->lit_obj);
733 struct dt_object *next;
735 LOD_CHECK_STRIPED_IT(env, it, lo);
737 next = lo->ldo_stripe[it->lit_stripe_index];
738 LASSERT(next != NULL);
739 LASSERT(next->do_index_ops != NULL);
741 return next->do_index_ops->dio_it.rec_size(env, it->lit_it, attr);
745 * Implementation of dt_it_ops::store.
747 * Used with striped objects.
749 * \see dt_it_ops::store() in the API description for details.
751 static __u64 lod_striped_it_store(const struct lu_env *env,
752 const struct dt_it *di)
754 const struct lod_it *it = (const struct lod_it *)di;
755 struct lod_object *lo = lod_dt_obj(it->lit_obj);
756 struct dt_object *next;
758 LOD_CHECK_STRIPED_IT(env, it, lo);
760 next = lo->ldo_stripe[it->lit_stripe_index];
761 LASSERT(next != NULL);
762 LASSERT(next->do_index_ops != NULL);
764 return next->do_index_ops->dio_it.store(env, it->lit_it);
768 * Implementation of dt_it_ops::load.
770 * Used with striped objects.
772 * \see dt_it_ops::load() in the API description for details.
774 static int lod_striped_it_load(const struct lu_env *env,
775 const struct dt_it *di, __u64 hash)
777 const struct lod_it *it = (const struct lod_it *)di;
778 struct lod_object *lo = lod_dt_obj(it->lit_obj);
779 struct dt_object *next;
781 LOD_CHECK_STRIPED_IT(env, it, lo);
783 next = lo->ldo_stripe[it->lit_stripe_index];
784 LASSERT(next != NULL);
785 LASSERT(next->do_index_ops != NULL);
787 return next->do_index_ops->dio_it.load(env, it->lit_it, hash);
790 static const struct dt_index_operations lod_striped_index_ops = {
791 .dio_lookup = lod_striped_lookup,
792 .dio_declare_insert = lod_declare_insert,
793 .dio_insert = lod_insert,
794 .dio_declare_delete = lod_declare_delete,
795 .dio_delete = lod_delete,
797 .init = lod_striped_it_init,
798 .fini = lod_striped_it_fini,
799 .get = lod_striped_it_get,
800 .put = lod_striped_it_put,
801 .next = lod_striped_it_next,
802 .key = lod_striped_it_key,
803 .key_size = lod_striped_it_key_size,
804 .rec = lod_striped_it_rec,
805 .rec_size = lod_striped_it_rec_size,
806 .store = lod_striped_it_store,
807 .load = lod_striped_it_load,
812 * Append the FID for each shard of the striped directory after the
813 * given LMV EA header.
815 * To simplify striped directory and the consistency verification,
816 * we only store the LMV EA header on disk, for both master object
817 * and slave objects. When someone wants to know the whole LMV EA,
818 * such as client readdir(), we can build the entrie LMV EA on the
819 * MDT side (in RAM) via iterating the sub-directory entries that
820 * are contained in the master object of the stripe directory.
822 * For the master object of the striped directroy, the valid name
823 * for each shard is composed of the ${shard_FID}:${shard_idx}.
825 * There may be holes in the LMV EA if some shards' name entries
826 * are corrupted or lost.
828 * \param[in] env pointer to the thread context
829 * \param[in] lo pointer to the master object of the striped directory
830 * \param[in] buf pointer to the lu_buf which will hold the LMV EA
831 * \param[in] resize whether re-allocate the buffer if it is not big enough
833 * \retval positive size of the LMV EA
834 * \retval 0 for nothing to be loaded
835 * \retval negative error number on failure
837 int lod_load_lmv_shards(const struct lu_env *env, struct lod_object *lo,
838 struct lu_buf *buf, bool resize)
840 struct lu_dirent *ent =
841 (struct lu_dirent *)lod_env_info(env)->lti_key;
842 struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
843 struct dt_object *obj = dt_object_child(&lo->ldo_obj);
844 struct lmv_mds_md_v1 *lmv1 = buf->lb_buf;
846 const struct dt_it_ops *iops;
848 __u32 magic = le32_to_cpu(lmv1->lmv_magic);
853 if (magic != LMV_MAGIC_V1)
856 stripes = le32_to_cpu(lmv1->lmv_stripe_count);
860 rc = lmv_mds_md_size(stripes, magic);
864 if (buf->lb_len < lmv1_size) {
873 lu_buf_alloc(buf, lmv1_size);
878 memcpy(buf->lb_buf, tbuf.lb_buf, tbuf.lb_len);
881 if (unlikely(!dt_try_as_dir(env, obj)))
884 memset(&lmv1->lmv_stripe_fids[0], 0, stripes * sizeof(struct lu_fid));
885 iops = &obj->do_index_ops->dio_it;
886 it = iops->init(env, obj, LUDA_64BITHASH);
890 rc = iops->load(env, it, 0);
892 rc = iops->next(env, it);
897 char name[FID_LEN + 2] = "";
902 rc = iops->rec(env, it, (struct dt_rec *)ent, LUDA_64BITHASH);
908 fid_le_to_cpu(&fid, &ent->lde_fid);
909 ent->lde_namelen = le16_to_cpu(ent->lde_namelen);
910 if (ent->lde_name[0] == '.') {
911 if (ent->lde_namelen == 1)
914 if (ent->lde_namelen == 2 && ent->lde_name[1] == '.')
918 len = scnprintf(name, sizeof(name),
919 DFID":", PFID(&ent->lde_fid));
920 /* The ent->lde_name is composed of ${FID}:${index} */
921 if (ent->lde_namelen < len + 1 ||
922 memcmp(ent->lde_name, name, len) != 0) {
923 CDEBUG_LIMIT(lod->lod_lmv_failout ? D_ERROR : D_INFO,
924 "%s: invalid shard name %.*s with the FID "DFID" for the striped directory "DFID", %s\n",
925 lod2obd(lod)->obd_name, ent->lde_namelen,
926 ent->lde_name, PFID(&fid),
927 PFID(lu_object_fid(&obj->do_lu)),
928 lod->lod_lmv_failout ? "failout" : "skip");
930 if (lod->lod_lmv_failout)
938 if (ent->lde_name[len] < '0' ||
939 ent->lde_name[len] > '9') {
940 CDEBUG_LIMIT(lod->lod_lmv_failout ?
942 "%s: invalid shard name %.*s with the FID "DFID" for the striped directory "DFID", %s\n",
943 lod2obd(lod)->obd_name,
945 ent->lde_name, PFID(&fid),
946 PFID(lu_object_fid(&obj->do_lu)),
947 lod->lod_lmv_failout ?
950 if (lod->lod_lmv_failout)
956 index = index * 10 + ent->lde_name[len++] - '0';
957 } while (len < ent->lde_namelen);
959 if (len == ent->lde_namelen) {
960 /* Out of LMV EA range. */
961 if (index >= stripes) {
962 CERROR("%s: the shard %.*s for the striped "
963 "directory "DFID" is out of the known "
964 "LMV EA range [0 - %u], failout\n",
965 lod2obd(lod)->obd_name, ent->lde_namelen,
967 PFID(lu_object_fid(&obj->do_lu)),
973 /* The slot has been occupied. */
974 if (!fid_is_zero(&lmv1->lmv_stripe_fids[index])) {
978 &lmv1->lmv_stripe_fids[index]);
979 CERROR("%s: both the shard "DFID" and "DFID
980 " for the striped directory "DFID
981 " claim the same LMV EA slot at the "
982 "index %d, failout\n",
983 lod2obd(lod)->obd_name,
984 PFID(&fid0), PFID(&fid),
985 PFID(lu_object_fid(&obj->do_lu)), index);
990 /* stored as LE mode */
991 lmv1->lmv_stripe_fids[index] = ent->lde_fid;
994 rc = iops->next(env, it);
1001 RETURN(rc > 0 ? lmv_mds_md_size(stripes, magic) : rc);
1005 * Implementation of dt_object_operations::do_index_try.
1007 * \see dt_object_operations::do_index_try() in the API description for details.
1009 static int lod_index_try(const struct lu_env *env, struct dt_object *dt,
1010 const struct dt_index_features *feat)
1012 struct lod_object *lo = lod_dt_obj(dt);
1013 struct dt_object *next = dt_object_child(dt);
1017 LASSERT(next->do_ops);
1018 LASSERT(next->do_ops->do_index_try);
1020 rc = lod_striping_load(env, lo);
1024 rc = next->do_ops->do_index_try(env, next, feat);
1028 if (lo->ldo_dir_stripe_count > 0) {
1031 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
1032 if (!lo->ldo_stripe[i])
1034 if (!dt_object_exists(lo->ldo_stripe[i]))
1036 rc = lo->ldo_stripe[i]->do_ops->do_index_try(env,
1037 lo->ldo_stripe[i], feat);
1041 dt->do_index_ops = &lod_striped_index_ops;
1043 dt->do_index_ops = &lod_index_ops;
1050 * Implementation of dt_object_operations::do_read_lock.
1052 * \see dt_object_operations::do_read_lock() in the API description for details.
1054 static void lod_read_lock(const struct lu_env *env, struct dt_object *dt,
1057 dt_read_lock(env, dt_object_child(dt), role);
1061 * Implementation of dt_object_operations::do_write_lock.
1063 * \see dt_object_operations::do_write_lock() in the API description for
1066 static void lod_write_lock(const struct lu_env *env, struct dt_object *dt,
1069 dt_write_lock(env, dt_object_child(dt), role);
1073 * Implementation of dt_object_operations::do_read_unlock.
1075 * \see dt_object_operations::do_read_unlock() in the API description for
1078 static void lod_read_unlock(const struct lu_env *env, struct dt_object *dt)
1080 dt_read_unlock(env, dt_object_child(dt));
1084 * Implementation of dt_object_operations::do_write_unlock.
1086 * \see dt_object_operations::do_write_unlock() in the API description for
1089 static void lod_write_unlock(const struct lu_env *env, struct dt_object *dt)
1091 dt_write_unlock(env, dt_object_child(dt));
1095 * Implementation of dt_object_operations::do_write_locked.
1097 * \see dt_object_operations::do_write_locked() in the API description for
1100 static int lod_write_locked(const struct lu_env *env, struct dt_object *dt)
1102 return dt_write_locked(env, dt_object_child(dt));
1106 * Implementation of dt_object_operations::do_attr_get.
1108 * \see dt_object_operations::do_attr_get() in the API description for details.
1110 static int lod_attr_get(const struct lu_env *env,
1111 struct dt_object *dt,
1112 struct lu_attr *attr)
1114 /* Note: for striped directory, client will merge attributes
1115 * from all of the sub-stripes see lmv_merge_attr(), and there
1116 * no MDD logic depend on directory nlink/size/time, so we can
1117 * always use master inode nlink and size for now. */
1118 return dt_attr_get(env, dt_object_child(dt), attr);
1121 void lod_adjust_stripe_size(struct lod_layout_component *comp,
1122 __u32 def_stripe_size)
1124 __u64 comp_end = comp->llc_extent.e_end;
1126 /* Choose stripe size if not set. Note that default stripe size can't
1127 * be used as is, because it must be multiplier of given component end.
1128 * - first check if default stripe size can be used
1129 * - if not than select the lowest set bit from component end and use
1130 * that value as stripe size
1132 if (!comp->llc_stripe_size) {
1133 if (comp_end == LUSTRE_EOF || !(comp_end % def_stripe_size))
1134 comp->llc_stripe_size = def_stripe_size;
1136 comp->llc_stripe_size = comp_end & ~(comp_end - 1);
1138 if (comp_end != LUSTRE_EOF &&
1139 comp_end & (LOV_MIN_STRIPE_SIZE - 1)) {
1140 CWARN("Component end %llu is not a multiple of min size %u\n",
1141 comp_end, LOV_MIN_STRIPE_SIZE);
1142 comp_end = round_up(comp_end, LOV_MIN_STRIPE_SIZE);
1144 /* check stripe size is multiplier of comp_end */
1145 if (comp_end != LUSTRE_EOF &&
1146 comp_end != comp->llc_extent.e_start &&
1147 comp_end % comp->llc_stripe_size) {
1148 /* fix that even for defined stripe size but warn
1149 * about the problem, that must not happen
1151 CWARN("Component end %llu is not aligned by the stripe size %u\n",
1152 comp_end, comp->llc_stripe_size);
1153 comp->llc_stripe_size = comp_end & ~(comp_end - 1);
1158 static inline void lod_adjust_stripe_info(struct lod_layout_component *comp,
1159 struct lov_desc *desc,
1162 if (comp->llc_pattern != LOV_PATTERN_MDT) {
1163 if (append_stripes) {
1164 comp->llc_stripe_count = append_stripes;
1165 } else if (!comp->llc_stripe_count) {
1166 comp->llc_stripe_count =
1167 desc->ld_default_stripe_count;
1171 lod_adjust_stripe_size(comp, desc->ld_default_stripe_size);
1174 int lod_obj_for_each_stripe(const struct lu_env *env, struct lod_object *lo,
1176 struct lod_obj_stripe_cb_data *data)
1178 struct lod_layout_component *lod_comp;
1182 mutex_lock(&lo->ldo_layout_mutex);
1183 for (i = 0; i < lo->ldo_comp_cnt; i++) {
1184 lod_comp = &lo->ldo_comp_entries[i];
1186 if (lod_comp->llc_stripe == NULL)
1189 /* has stripe but not inited yet, this component has been
1190 * declared to be created, but hasn't created yet.
1192 if (!lod_comp_inited(lod_comp))
1195 if (data->locd_comp_skip_cb &&
1196 data->locd_comp_skip_cb(env, lo, i, data))
1199 if (data->locd_comp_cb) {
1200 rc = data->locd_comp_cb(env, lo, i, data);
1205 /* could used just to do sth about component, not each
1208 if (!data->locd_stripe_cb)
1211 LASSERT(lod_comp->llc_stripe_count > 0);
1212 for (j = 0; j < lod_comp->llc_stripe_count; j++) {
1213 struct dt_object *dt = lod_comp->llc_stripe[j];
1217 rc = data->locd_stripe_cb(env, lo, dt, th, i, j, data);
1223 mutex_unlock(&lo->ldo_layout_mutex);
1227 static bool lod_obj_attr_set_comp_skip_cb(const struct lu_env *env,
1228 struct lod_object *lo, int comp_idx,
1229 struct lod_obj_stripe_cb_data *data)
1231 struct lod_layout_component *lod_comp = &lo->ldo_comp_entries[comp_idx];
1232 bool skipped = false;
1234 if (!(data->locd_attr->la_valid & LA_LAYOUT_VERSION))
1237 switch (lo->ldo_flr_state) {
1238 case LCM_FL_WRITE_PENDING: {
1241 /* skip stale components */
1242 if (lod_comp->llc_flags & LCME_FL_STALE) {
1247 /* skip valid and overlapping components, therefore any
1248 * attempts to write overlapped components will never succeed
1249 * because client will get EINPROGRESS. */
1250 for (i = 0; i < lo->ldo_comp_cnt; i++) {
1254 if (lo->ldo_comp_entries[i].llc_flags & LCME_FL_STALE)
1257 if (lu_extent_is_overlapped(&lod_comp->llc_extent,
1258 &lo->ldo_comp_entries[i].llc_extent)) {
1266 case LCM_FL_SYNC_PENDING:
1269 LASSERTF(0, "impossible: %d\n", lo->ldo_flr_state);
1273 CDEBUG(D_LAYOUT, DFID": %s to set component %x to version: %u\n",
1274 PFID(lu_object_fid(&lo->ldo_obj.do_lu)),
1275 skipped ? "skipped" : "chose", lod_comp->llc_id,
1276 data->locd_attr->la_layout_version);
1282 lod_obj_stripe_attr_set_cb(const struct lu_env *env, struct lod_object *lo,
1283 struct dt_object *dt, struct thandle *th,
1284 int comp_idx, int stripe_idx,
1285 struct lod_obj_stripe_cb_data *data)
1287 if (data->locd_declare)
1288 return lod_sub_declare_attr_set(env, dt, data->locd_attr, th);
1290 if (data->locd_attr->la_valid & LA_LAYOUT_VERSION) {
1291 CDEBUG(D_LAYOUT, DFID": set layout version: %u, comp_idx: %d\n",
1292 PFID(lu_object_fid(&dt->do_lu)),
1293 data->locd_attr->la_layout_version, comp_idx);
1296 return lod_sub_attr_set(env, dt, data->locd_attr, th);
1300 * Implementation of dt_object_operations::do_declare_attr_set.
1302 * If the object is striped, then apply the changes to all the stripes.
1304 * \see dt_object_operations::do_declare_attr_set() in the API description
1307 static int lod_declare_attr_set(const struct lu_env *env,
1308 struct dt_object *dt,
1309 const struct lu_attr *attr,
1312 struct dt_object *next = dt_object_child(dt);
1313 struct lod_object *lo = lod_dt_obj(dt);
1318 * declare setattr on the local object
1320 rc = lod_sub_declare_attr_set(env, next, attr, th);
1324 /* osp_declare_attr_set() ignores all attributes other than
1325 * UID, GID, PROJID, and size, and osp_attr_set() ignores all
1326 * but UID, GID and PROJID. Declaration of size attr setting
1327 * happens through lod_declare_init_size(), and not through
1328 * this function. Therefore we need not load striping unless
1329 * ownership is changing. This should save memory and (we hope)
1330 * speed up rename().
1332 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
1333 if (!(attr->la_valid & LA_REMOTE_ATTR_SET))
1336 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_OWNER))
1339 if (!(attr->la_valid & (LA_UID | LA_GID | LA_PROJID | LA_MODE |
1340 LA_ATIME | LA_MTIME | LA_CTIME |
1345 * load striping information, notice we don't do this when object
1346 * is being initialized as we don't need this information till
1347 * few specific cases like destroy, chown
1349 rc = lod_striping_load(env, lo);
1353 if (!lod_obj_is_striped(dt))
1357 * if object is striped declare changes on the stripes
1359 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
1360 LASSERT(lo->ldo_stripe);
1361 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
1362 if (lo->ldo_stripe[i] == NULL)
1364 if (!dt_object_exists(lo->ldo_stripe[i]))
1366 rc = lod_sub_declare_attr_set(env, lo->ldo_stripe[i],
1372 struct lod_obj_stripe_cb_data data = { { 0 } };
1374 data.locd_attr = attr;
1375 data.locd_declare = true;
1376 data.locd_stripe_cb = lod_obj_stripe_attr_set_cb;
1377 rc = lod_obj_for_each_stripe(env, lo, th, &data);
1383 if (!dt_object_exists(next) || dt_object_remote(next) ||
1384 !S_ISREG(attr->la_mode))
1387 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_STRIPE)) {
1388 rc = lod_sub_declare_xattr_del(env, next, XATTR_NAME_LOV, th);
1392 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CHANGE_STRIPE) ||
1393 OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PFL_RANGE)) {
1394 struct lod_thread_info *info = lod_env_info(env);
1395 struct lu_buf *buf = &info->lti_buf;
1397 buf->lb_buf = info->lti_ea_store;
1398 buf->lb_len = info->lti_ea_store_size;
1399 rc = lod_sub_declare_xattr_set(env, next, buf, XATTR_NAME_LOV,
1400 LU_XATTR_REPLACE, th);
1407 * Implementation of dt_object_operations::do_attr_set.
1409 * If the object is striped, then apply the changes to all or subset of
1410 * the stripes depending on the object type and specific attributes.
1412 * \see dt_object_operations::do_attr_set() in the API description for details.
1414 static int lod_attr_set(const struct lu_env *env,
1415 struct dt_object *dt,
1416 const struct lu_attr *attr,
1419 struct dt_object *next = dt_object_child(dt);
1420 struct lod_object *lo = lod_dt_obj(dt);
1425 * apply changes to the local object
1427 rc = lod_sub_attr_set(env, next, attr, th);
1431 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
1432 if (!(attr->la_valid & LA_REMOTE_ATTR_SET))
1435 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_OWNER))
1438 if (!(attr->la_valid & (LA_UID | LA_GID | LA_MODE | LA_PROJID |
1439 LA_ATIME | LA_MTIME | LA_CTIME |
1444 /* FIXME: a tricky case in the code path of mdd_layout_change():
1445 * the in-memory striping information has been freed in lod_xattr_set()
1446 * due to layout change. It has to load stripe here again. It only
1447 * changes flags of layout so declare_attr_set() is still accurate */
1448 rc = lod_striping_load(env, lo);
1452 if (!lod_obj_is_striped(dt))
1456 * if object is striped, apply changes to all the stripes
1458 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
1459 LASSERT(lo->ldo_stripe);
1460 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
1461 if (unlikely(lo->ldo_stripe[i] == NULL))
1464 if ((dt_object_exists(lo->ldo_stripe[i]) == 0))
1467 rc = lod_sub_attr_set(env, lo->ldo_stripe[i], attr, th);
1472 struct lod_obj_stripe_cb_data data = { { 0 } };
1474 data.locd_attr = attr;
1475 data.locd_declare = false;
1476 data.locd_comp_skip_cb = lod_obj_attr_set_comp_skip_cb;
1477 data.locd_stripe_cb = lod_obj_stripe_attr_set_cb;
1478 rc = lod_obj_for_each_stripe(env, lo, th, &data);
1484 if (!dt_object_exists(next) || dt_object_remote(next) ||
1485 !S_ISREG(attr->la_mode))
1488 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_STRIPE)) {
1489 rc = lod_sub_xattr_del(env, next, XATTR_NAME_LOV, th);
1493 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CHANGE_STRIPE)) {
1494 struct lod_thread_info *info = lod_env_info(env);
1495 struct lu_buf *buf = &info->lti_buf;
1496 struct ost_id *oi = &info->lti_ostid;
1497 struct lu_fid *fid = &info->lti_fid;
1498 struct lov_mds_md_v1 *lmm;
1499 struct lov_ost_data_v1 *objs;
1502 rc = lod_get_lov_ea(env, lo);
1506 buf->lb_buf = info->lti_ea_store;
1507 buf->lb_len = info->lti_ea_store_size;
1508 lmm = info->lti_ea_store;
1509 magic = le32_to_cpu(lmm->lmm_magic);
1510 if (magic == LOV_MAGIC_COMP_V1 || magic == LOV_MAGIC_SEL) {
1511 struct lov_comp_md_v1 *lcm = buf->lb_buf;
1512 struct lov_comp_md_entry_v1 *lcme =
1513 &lcm->lcm_entries[0];
1515 lmm = buf->lb_buf + le32_to_cpu(lcme->lcme_offset);
1516 magic = le32_to_cpu(lmm->lmm_magic);
1519 if (magic == LOV_MAGIC_V1)
1520 objs = &(lmm->lmm_objects[0]);
1522 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
1523 ostid_le_to_cpu(&objs->l_ost_oi, oi);
1524 ostid_to_fid(fid, oi, le32_to_cpu(objs->l_ost_idx));
1526 fid_to_ostid(fid, oi);
1527 ostid_cpu_to_le(oi, &objs->l_ost_oi);
1529 rc = lod_sub_xattr_set(env, next, buf, XATTR_NAME_LOV,
1530 LU_XATTR_REPLACE, th);
1531 } else if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PFL_RANGE)) {
1532 struct lod_thread_info *info = lod_env_info(env);
1533 struct lu_buf *buf = &info->lti_buf;
1534 struct lov_comp_md_v1 *lcm;
1535 struct lov_comp_md_entry_v1 *lcme;
1537 rc = lod_get_lov_ea(env, lo);
1541 buf->lb_buf = info->lti_ea_store;
1542 buf->lb_len = info->lti_ea_store_size;
1544 if (le32_to_cpu(lcm->lcm_magic) != LOV_MAGIC_COMP_V1 &&
1545 le32_to_cpu(lcm->lcm_magic) != LOV_MAGIC_SEL)
1548 le32_add_cpu(&lcm->lcm_layout_gen, 1);
1549 lcme = &lcm->lcm_entries[0];
1550 le64_add_cpu(&lcme->lcme_extent.e_start, 1);
1551 le64_add_cpu(&lcme->lcme_extent.e_end, -1);
1553 rc = lod_sub_xattr_set(env, next, buf, XATTR_NAME_LOV,
1554 LU_XATTR_REPLACE, th);
1561 * Implementation of dt_object_operations::do_xattr_get.
1563 * If LOV EA is requested from the root object and it's not
1564 * found, then return default striping for the filesystem.
1566 * \see dt_object_operations::do_xattr_get() in the API description for details.
1568 static int lod_xattr_get(const struct lu_env *env, struct dt_object *dt,
1569 struct lu_buf *buf, const char *name)
1571 struct lod_thread_info *info = lod_env_info(env);
1572 struct lod_device *dev = lu2lod_dev(dt->do_lu.lo_dev);
1577 rc = dt_xattr_get(env, dt_object_child(dt), buf, name);
1578 if (strcmp(name, XATTR_NAME_LMV) == 0) {
1579 struct lmv_mds_md_v1 *lmv1;
1580 struct lmv_foreign_md *lfm;
1583 if (rc > (typeof(rc))sizeof(*lmv1))
1586 /* short (<= sizeof(struct lmv_mds_md_v1)) foreign LMV case */
1587 /* XXX empty foreign LMV is not allowed */
1588 if (rc <= offsetof(typeof(*lfm), lfm_value))
1589 RETURN(rc = rc > 0 ? -EINVAL : rc);
1591 if (buf->lb_buf == NULL || buf->lb_len == 0) {
1592 BUILD_BUG_ON(sizeof(*lmv1) > sizeof(info->lti_key));
1594 /* lti_buf is large enough for *lmv1 or a short
1595 * (<= sizeof(struct lmv_mds_md_v1)) foreign LMV
1597 info->lti_buf.lb_buf = info->lti_key;
1598 info->lti_buf.lb_len = sizeof(*lmv1);
1599 rc = dt_xattr_get(env, dt_object_child(dt),
1600 &info->lti_buf, name);
1601 if (unlikely(rc <= offsetof(typeof(*lfm),
1603 RETURN(rc = rc > 0 ? -EINVAL : rc);
1605 lfm = info->lti_buf.lb_buf;
1606 if (le32_to_cpu(lfm->lfm_magic) == LMV_MAGIC_FOREIGN)
1609 if (unlikely(rc != sizeof(*lmv1)))
1610 RETURN(rc = rc > 0 ? -EINVAL : rc);
1612 lmv1 = info->lti_buf.lb_buf;
1613 /* The on-disk LMV EA only contains header, but the
1614 * returned LMV EA size should contain the space for
1615 * the FIDs of all shards of the striped directory. */
1616 if (le32_to_cpu(lmv1->lmv_magic) == LMV_MAGIC_V1)
1617 rc = lmv_mds_md_size(
1618 le32_to_cpu(lmv1->lmv_stripe_count),
1619 le32_to_cpu(lmv1->lmv_magic));
1622 if (le32_to_cpu(lmv1->lmv_magic) != LMV_MAGIC_V1)
1625 if (rc != sizeof(*lmv1))
1626 RETURN(rc = rc > 0 ? -EINVAL : rc);
1628 rc1 = lod_load_lmv_shards(env, lod_dt_obj(dt),
1632 RETURN(rc = rc1 != 0 ? rc1 : rc);
1635 if ((rc > 0) && buf->lb_buf && strcmp(name, XATTR_NAME_LOV) == 0) {
1636 struct lov_comp_md_v1 *lcm = buf->lb_buf;
1638 if (lcm->lcm_magic == cpu_to_le32(LOV_MAGIC_SEL))
1639 lcm->lcm_magic = cpu_to_le32(LOV_MAGIC_COMP_V1);
1642 if (rc != -ENODATA || !S_ISDIR(dt->do_lu.lo_header->loh_attr & S_IFMT))
1646 * XXX: Only used by lfsck
1648 * lod returns default striping on the real root of the device
1649 * this is like the root stores default striping for the whole
1650 * filesystem. historically we've been using a different approach
1651 * and store it in the config.
1653 dt_root_get(env, dev->lod_child, &info->lti_fid);
1654 is_root = lu_fid_eq(&info->lti_fid, lu_object_fid(&dt->do_lu));
1656 if (is_root && strcmp(XATTR_NAME_LOV, name) == 0) {
1657 struct lov_user_md *lum = buf->lb_buf;
1658 struct lov_desc *desc = &dev->lod_ost_descs.ltd_lov_desc;
1660 if (buf->lb_buf == NULL) {
1662 } else if (buf->lb_len >= sizeof(*lum)) {
1663 lum->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V1);
1664 lmm_oi_set_seq(&lum->lmm_oi, FID_SEQ_LOV_DEFAULT);
1665 lmm_oi_set_id(&lum->lmm_oi, 0);
1666 lmm_oi_cpu_to_le(&lum->lmm_oi, &lum->lmm_oi);
1667 lum->lmm_pattern = cpu_to_le32(desc->ld_pattern);
1668 lum->lmm_stripe_size = cpu_to_le32(
1669 desc->ld_default_stripe_size);
1670 lum->lmm_stripe_count = cpu_to_le16(
1671 desc->ld_default_stripe_count);
1672 lum->lmm_stripe_offset = cpu_to_le16(
1673 desc->ld_default_stripe_offset);
1686 * Checks that the magic of the stripe is sane.
1688 * \param[in] lod lod device
1689 * \param[in] lum a buffer storing LMV EA to verify
1691 * \retval 0 if the EA is sane
1692 * \retval negative otherwise
1694 static int lod_verify_md_striping(struct lod_device *lod,
1695 const struct lmv_user_md_v1 *lum)
1697 if (unlikely(le32_to_cpu(lum->lum_magic) != LMV_USER_MAGIC)) {
1698 CERROR("%s: invalid lmv_user_md: magic = %x, "
1699 "stripe_offset = %d, stripe_count = %u: rc = %d\n",
1700 lod2obd(lod)->obd_name, le32_to_cpu(lum->lum_magic),
1701 (int)le32_to_cpu(lum->lum_stripe_offset),
1702 le32_to_cpu(lum->lum_stripe_count), -EINVAL);
1710 * Initialize LMV EA for a slave.
1712 * Initialize slave's LMV EA from the master's LMV EA.
1714 * \param[in] master_lmv a buffer containing master's EA
1715 * \param[out] slave_lmv a buffer where slave's EA will be stored
1718 static void lod_prep_slave_lmv_md(struct lmv_mds_md_v1 *slave_lmv,
1719 const struct lmv_mds_md_v1 *master_lmv)
1721 *slave_lmv = *master_lmv;
1722 slave_lmv->lmv_magic = cpu_to_le32(LMV_MAGIC_STRIPE);
1728 * Generate LMV EA from the object passed as \a dt. The object must have
1729 * the stripes created and initialized.
1731 * \param[in] env execution environment
1732 * \param[in] dt object
1733 * \param[out] lmv_buf buffer storing generated LMV EA
1735 * \retval 0 on success
1736 * \retval negative if failed
1738 static int lod_prep_lmv_md(const struct lu_env *env, struct dt_object *dt,
1739 struct lu_buf *lmv_buf)
1741 struct lod_thread_info *info = lod_env_info(env);
1742 struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev);
1743 struct lod_object *lo = lod_dt_obj(dt);
1744 struct lmv_mds_md_v1 *lmm1;
1746 int type = LU_SEQ_RANGE_ANY;
1751 LASSERT(lo->ldo_dir_striped != 0);
1752 LASSERT(lo->ldo_dir_stripe_count > 0);
1753 stripe_count = lo->ldo_dir_stripe_count;
1754 /* Only store the LMV EA heahder on the disk. */
1755 if (info->lti_ea_store_size < sizeof(*lmm1)) {
1756 rc = lod_ea_store_resize(info, sizeof(*lmm1));
1760 memset(info->lti_ea_store, 0, sizeof(*lmm1));
1763 lmm1 = (struct lmv_mds_md_v1 *)info->lti_ea_store;
1764 memset(lmm1, 0, sizeof(*lmm1));
1765 lmm1->lmv_magic = cpu_to_le32(LMV_MAGIC);
1766 lmm1->lmv_stripe_count = cpu_to_le32(stripe_count);
1767 lmm1->lmv_hash_type = cpu_to_le32(lo->ldo_dir_hash_type);
1768 lmm1->lmv_layout_version = cpu_to_le32(lo->ldo_dir_layout_version);
1769 if (lod_is_layout_changing(lo)) {
1770 lmm1->lmv_migrate_hash = cpu_to_le32(lo->ldo_dir_migrate_hash);
1771 lmm1->lmv_migrate_offset =
1772 cpu_to_le32(lo->ldo_dir_migrate_offset);
1774 rc = lod_fld_lookup(env, lod, lu_object_fid(&dt->do_lu),
1779 lmm1->lmv_master_mdt_index = cpu_to_le32(mdtidx);
1780 lmv_buf->lb_buf = info->lti_ea_store;
1781 lmv_buf->lb_len = sizeof(*lmm1);
1787 * Create in-core represenation for a striped directory.
1789 * Parse the buffer containing LMV EA and instantiate LU objects
1790 * representing the stripe objects. The pointers to the objects are
1791 * stored in ldo_stripe field of \a lo. This function is used when
1792 * we need to access an already created object (i.e. load from a disk).
1794 * \param[in] env execution environment
1795 * \param[in] lo lod object
1796 * \param[in] buf buffer containing LMV EA
1798 * \retval 0 on success
1799 * \retval negative if failed
1801 int lod_parse_dir_striping(const struct lu_env *env, struct lod_object *lo,
1802 const struct lu_buf *buf)
1804 struct lod_thread_info *info = lod_env_info(env);
1805 struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
1806 struct lod_tgt_descs *ltd = &lod->lod_mdt_descs;
1807 struct dt_object **stripe;
1808 union lmv_mds_md *lmm = buf->lb_buf;
1809 struct lmv_mds_md_v1 *lmv1 = &lmm->lmv_md_v1;
1810 struct lu_fid *fid = &info->lti_fid;
1815 LASSERT(mutex_is_locked(&lo->ldo_layout_mutex));
1817 /* XXX may be useless as not called for foreign LMV ?? */
1818 if (le32_to_cpu(lmv1->lmv_magic) == LMV_MAGIC_FOREIGN)
1821 if (le32_to_cpu(lmv1->lmv_magic) == LMV_MAGIC_STRIPE) {
1822 lo->ldo_dir_slave_stripe = 1;
1826 if (!lmv_is_sane(lmv1))
1829 LASSERT(lo->ldo_stripe == NULL);
1830 OBD_ALLOC_PTR_ARRAY(stripe, le32_to_cpu(lmv1->lmv_stripe_count));
1834 for (i = 0; i < le32_to_cpu(lmv1->lmv_stripe_count); i++) {
1835 struct dt_device *tgt_dt;
1836 struct dt_object *dto;
1837 int type = LU_SEQ_RANGE_ANY;
1840 fid_le_to_cpu(fid, &lmv1->lmv_stripe_fids[i]);
1841 if (!fid_is_sane(fid)) {
1846 rc = lod_fld_lookup(env, lod, fid, &idx, &type);
1850 if (idx == lod2lu_dev(lod)->ld_site->ld_seq_site->ss_node_id) {
1851 tgt_dt = lod->lod_child;
1853 struct lod_tgt_desc *tgt;
1855 tgt = LTD_TGT(ltd, idx);
1857 GOTO(out, rc = -ESTALE);
1858 tgt_dt = tgt->ltd_tgt;
1861 dto = dt_locate_at(env, tgt_dt, fid,
1862 lo->ldo_obj.do_lu.lo_dev->ld_site->ls_top_dev,
1865 GOTO(out, rc = PTR_ERR(dto));
1870 lo->ldo_stripe = stripe;
1871 lo->ldo_dir_stripe_count = le32_to_cpu(lmv1->lmv_stripe_count);
1872 lo->ldo_dir_stripes_allocated = le32_to_cpu(lmv1->lmv_stripe_count);
1873 lo->ldo_dir_layout_version = le32_to_cpu(lmv1->lmv_layout_version);
1874 lo->ldo_dir_migrate_offset = le32_to_cpu(lmv1->lmv_migrate_offset);
1875 lo->ldo_dir_migrate_hash = le32_to_cpu(lmv1->lmv_migrate_hash);
1876 lo->ldo_dir_hash_type = le32_to_cpu(lmv1->lmv_hash_type);
1878 lod_striping_free_nolock(env, lo);
1884 * Declare create a striped directory.
1886 * Declare creating a striped directory with a given stripe pattern on the
1887 * specified MDTs. A striped directory is represented as a regular directory
1888 * - an index listing all the stripes. The stripes point back to the master
1889 * object with ".." and LinkEA. The master object gets LMV EA which
1890 * identifies it as a striped directory. The function allocates FIDs
1893 * \param[in] env execution environment
1894 * \param[in] dt object
1895 * \param[in] attr attributes to initialize the objects with
1896 * \param[in] dof type of objects to be created
1897 * \param[in] th transaction handle
1899 * \retval 0 on success
1900 * \retval negative if failed
1902 static int lod_dir_declare_create_stripes(const struct lu_env *env,
1903 struct dt_object *dt,
1904 struct lu_attr *attr,
1905 struct dt_object_format *dof,
1908 struct lod_thread_info *info = lod_env_info(env);
1909 struct lu_buf lmv_buf;
1910 struct lu_buf slave_lmv_buf;
1911 struct lmv_mds_md_v1 *lmm;
1912 struct lmv_mds_md_v1 *slave_lmm = NULL;
1913 struct dt_insert_rec *rec = &info->lti_dt_rec;
1914 struct lod_object *lo = lod_dt_obj(dt);
1919 rc = lod_prep_lmv_md(env, dt, &lmv_buf);
1922 lmm = lmv_buf.lb_buf;
1924 OBD_ALLOC_PTR(slave_lmm);
1925 if (slave_lmm == NULL)
1926 GOTO(out, rc = -ENOMEM);
1928 lod_prep_slave_lmv_md(slave_lmm, lmm);
1929 slave_lmv_buf.lb_buf = slave_lmm;
1930 slave_lmv_buf.lb_len = sizeof(*slave_lmm);
1932 if (!dt_try_as_dir(env, dt_object_child(dt)))
1933 GOTO(out, rc = -EINVAL);
1935 rec->rec_type = S_IFDIR;
1936 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
1937 struct dt_object *dto = lo->ldo_stripe[i];
1938 char *stripe_name = info->lti_key;
1939 struct lu_name *sname;
1940 struct linkea_data ldata = { NULL };
1941 struct lu_buf linkea_buf;
1943 /* OBD_FAIL_MDS_STRIPE_FID may leave stripe uninitialized */
1947 /* directory split skip create for existing stripes */
1948 if (!(lod_is_splitting(lo) && i < lo->ldo_dir_split_offset)) {
1949 rc = lod_sub_declare_create(env, dto, attr, NULL, dof,
1954 if (!dt_try_as_dir(env, dto))
1955 GOTO(out, rc = -EINVAL);
1957 rc = lod_sub_declare_ref_add(env, dto, th);
1961 rec->rec_fid = lu_object_fid(&dto->do_lu);
1962 rc = lod_sub_declare_insert(env, dto,
1963 (const struct dt_rec *)rec,
1964 (const struct dt_key *)dot,
1969 /* master stripe FID will be put to .. */
1970 rec->rec_fid = lu_object_fid(&dt->do_lu);
1971 rc = lod_sub_declare_insert(env, dto,
1972 (const struct dt_rec *)rec,
1973 (const struct dt_key *)dotdot,
1978 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_NAME) &&
1980 snprintf(stripe_name, sizeof(info->lti_key),
1982 PFID(lu_object_fid(&dto->do_lu)),
1985 snprintf(stripe_name, sizeof(info->lti_key),
1987 PFID(lu_object_fid(&dto->do_lu)), i);
1989 sname = lod_name_get(env, stripe_name,
1990 strlen(stripe_name));
1991 rc = linkea_links_new(&ldata, &info->lti_linkea_buf,
1992 sname, lu_object_fid(&dt->do_lu));
1996 linkea_buf.lb_buf = ldata.ld_buf->lb_buf;
1997 linkea_buf.lb_len = ldata.ld_leh->leh_len;
1998 rc = lod_sub_declare_xattr_set(env, dto, &linkea_buf,
1999 XATTR_NAME_LINK, 0, th);
2003 rec->rec_fid = lu_object_fid(&dto->do_lu);
2004 rc = lod_sub_declare_insert(env, dt_object_child(dt),
2005 (const struct dt_rec *)rec,
2006 (const struct dt_key *)stripe_name, th);
2010 rc = lod_sub_declare_ref_add(env, dt_object_child(dt),
2016 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_SLAVE_LMV) ||
2017 cfs_fail_val != i) {
2018 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_LMV) &&
2020 slave_lmm->lmv_master_mdt_index =
2023 slave_lmm->lmv_master_mdt_index =
2025 rc = lod_sub_declare_xattr_set(env, dto, &slave_lmv_buf,
2026 XATTR_NAME_LMV, 0, th);
2032 rc = lod_sub_declare_xattr_set(env, dt_object_child(dt),
2033 &lmv_buf, XATTR_NAME_LMV, 0, th);
2037 if (slave_lmm != NULL)
2038 OBD_FREE_PTR(slave_lmm);
2044 * Allocate a striping on a predefined set of MDTs.
2046 * Allocates new striping using the MDT index range provided by the data from
2047 * the lum_obejcts contained in the lmv_user_md passed to this method if
2048 * \a is_specific is true; or allocates new layout starting from MDT index in
2049 * lo->ldo_dir_stripe_offset. The exact order of MDTs is not important and
2050 * varies depending on MDT status. The number of stripes needed and stripe
2051 * offset are taken from the object. If that number cannot be met, then the
2052 * function returns an error and then it's the caller's responsibility to
2053 * release the stripes allocated. All the internal structures are protected,
2054 * but no concurrent allocation is allowed on the same objects.
2056 * \param[in] env execution environment for this thread
2057 * \param[in] lo LOD object
2058 * \param[out] stripes striping created
2059 * \param[out] mdt_indices MDT indices of striping created
2060 * \param[in] is_specific true if the MDTs are provided by lum; false if
2061 * only the starting MDT index is provided
2063 * \retval positive stripes allocated, including the first stripe allocated
2065 * \retval negative errno on failure
2067 static int lod_mdt_alloc_specific(const struct lu_env *env,
2068 struct lod_object *lo,
2069 struct dt_object **stripes,
2070 __u32 *mdt_indices, bool is_specific)
2072 struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
2073 struct lu_tgt_descs *ltd = &lod->lod_mdt_descs;
2074 struct lu_tgt_desc *tgt = NULL;
2075 struct lu_object_conf conf = { .loc_flags = LOC_F_NEW };
2076 struct dt_device *tgt_dt = NULL;
2077 struct lu_fid fid = { 0 };
2078 struct dt_object *dto;
2080 u32 stripe_count = lo->ldo_dir_stripe_count;
2086 master_index = lu_site2seq(lod2lu_dev(lod)->ld_site)->ss_node_id;
2087 if (!is_specific && stripe_count > 1)
2088 /* Set the start index for the 2nd stripe allocation */
2089 mdt_indices[1] = (mdt_indices[0] + 1) %
2090 (lod->lod_remote_mdt_count + 1);
2092 for (; stripe_idx < stripe_count; stripe_idx++) {
2093 /* Try to find next avaible target */
2094 idx = mdt_indices[stripe_idx];
2095 for (j = 0; j < lod->lod_remote_mdt_count;
2096 j++, idx = (idx + 1) % (lod->lod_remote_mdt_count + 1)) {
2097 bool already_allocated = false;
2100 CDEBUG(D_INFO, "try idx %d, mdt cnt %u, allocated %u\n",
2101 idx, lod->lod_remote_mdt_count + 1, stripe_idx);
2103 if (likely(!is_specific &&
2104 !OBD_FAIL_CHECK(OBD_FAIL_LARGE_STRIPE))) {
2105 /* check whether the idx already exists
2106 * in current allocated array */
2107 for (k = 0; k < stripe_idx; k++) {
2108 if (mdt_indices[k] == idx) {
2109 already_allocated = true;
2114 if (already_allocated)
2118 /* Sigh, this index is not in the bitmap, let's check
2119 * next available target */
2120 if (!test_bit(idx, ltd->ltd_tgt_bitmap) &&
2121 idx != master_index)
2124 if (idx == master_index) {
2125 /* Allocate the FID locally */
2126 tgt_dt = lod->lod_child;
2127 rc = dt_fid_alloc(env, tgt_dt, &fid, NULL,
2134 /* check the status of the OSP */
2135 tgt = LTD_TGT(ltd, idx);
2139 tgt_dt = tgt->ltd_tgt;
2140 if (!tgt->ltd_active)
2141 /* this OSP doesn't feel well */
2144 rc = dt_fid_alloc(env, tgt_dt, &fid, NULL, NULL);
2151 /* Can not allocate more stripes */
2152 if (j == lod->lod_remote_mdt_count) {
2153 CDEBUG(D_INFO, "%s: require stripes %u only get %d\n",
2154 lod2obd(lod)->obd_name, stripe_count,
2159 CDEBUG(D_INFO, "Get idx %d, for stripe %d "DFID"\n",
2160 idx, stripe_idx, PFID(&fid));
2161 mdt_indices[stripe_idx] = idx;
2162 /* Set the start index for next stripe allocation */
2163 if (!is_specific && stripe_idx < stripe_count - 1) {
2165 * for large dir test, put all other slaves on one
2166 * remote MDT, otherwise we may save too many local
2167 * slave locks which will exceed RS_MAX_LOCKS.
2169 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_LARGE_STRIPE)))
2171 mdt_indices[stripe_idx + 1] = (idx + 1) %
2172 (lod->lod_remote_mdt_count + 1);
2174 /* tgt_dt and fid must be ready after search avaible OSP
2175 * in the above loop */
2176 LASSERT(tgt_dt != NULL);
2177 LASSERT(fid_is_sane(&fid));
2179 /* fail a remote stripe FID allocation */
2180 if (stripe_idx && OBD_FAIL_CHECK(OBD_FAIL_MDS_STRIPE_FID))
2183 dto = dt_locate_at(env, tgt_dt, &fid,
2184 lo->ldo_obj.do_lu.lo_dev->ld_site->ls_top_dev,
2191 stripes[stripe_idx] = dto;
2197 for (j = 1; j < stripe_idx; j++) {
2198 LASSERT(stripes[j] != NULL);
2199 dt_object_put(env, stripes[j]);
2205 static int lod_prep_md_striped_create(const struct lu_env *env,
2206 struct dt_object *dt,
2207 struct lu_attr *attr,
2208 const struct lmv_user_md_v1 *lum,
2209 struct dt_object_format *dof,
2212 struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev);
2213 struct lod_object *lo = lod_dt_obj(dt);
2214 struct dt_object **stripes;
2215 struct lu_object_conf conf = { .loc_flags = LOC_F_NEW };
2216 struct lu_fid fid = { 0 };
2223 /* The lum has been verifed in lod_verify_md_striping */
2224 LASSERT(le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC ||
2225 le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC_SPECIFIC);
2227 stripe_count = lo->ldo_dir_stripe_count;
2229 OBD_ALLOC_PTR_ARRAY(stripes, stripe_count);
2233 /* Allocate the first stripe locally */
2234 rc = dt_fid_alloc(env, lod->lod_child, &fid, NULL, NULL);
2238 stripes[0] = dt_locate_at(env, lod->lod_child, &fid,
2239 dt->do_lu.lo_dev->ld_site->ls_top_dev, &conf);
2240 if (IS_ERR(stripes[0]))
2241 GOTO(out, rc = PTR_ERR(stripes[0]));
2243 if (lo->ldo_dir_stripe_offset == LMV_OFFSET_DEFAULT) {
2244 lod_qos_statfs_update(env, lod, &lod->lod_mdt_descs);
2245 rc = lod_mdt_alloc_qos(env, lo, stripes, 1, stripe_count);
2247 rc = lod_mdt_alloc_rr(env, lo, stripes, 1,
2251 bool is_specific = false;
2253 OBD_ALLOC_PTR_ARRAY(idx_array, stripe_count);
2255 GOTO(out, rc = -ENOMEM);
2257 if (le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC_SPECIFIC) {
2259 for (i = 0; i < stripe_count; i++)
2261 le32_to_cpu(lum->lum_objects[i].lum_mds);
2264 /* stripe 0 is local */
2266 lu_site2seq(lod2lu_dev(lod)->ld_site)->ss_node_id;
2267 rc = lod_mdt_alloc_specific(env, lo, stripes, idx_array,
2269 OBD_FREE_PTR_ARRAY(idx_array, stripe_count);
2277 lo->ldo_dir_striped = 1;
2278 lo->ldo_stripe = stripes;
2279 lo->ldo_dir_stripe_count = rc;
2280 lo->ldo_dir_stripes_allocated = stripe_count;
2282 lo->ldo_dir_stripe_loaded = 1;
2284 rc = lod_dir_declare_create_stripes(env, dt, attr, dof, th);
2286 lod_striping_free(env, lo);
2292 if (!IS_ERR_OR_NULL(stripes[0]))
2293 dt_object_put(env, stripes[0]);
2294 for (i = 1; i < stripe_count; i++)
2295 LASSERT(!stripes[i]);
2296 OBD_FREE_PTR_ARRAY(stripes, stripe_count);
2303 * Alloc cached foreign LMV
2305 * \param[in] lo object
2306 * \param[in] size size of foreign LMV
2308 * \retval 0 on success
2309 * \retval negative if failed
2311 int lod_alloc_foreign_lmv(struct lod_object *lo, size_t size)
2313 OBD_ALLOC_LARGE(lo->ldo_foreign_lmv, size);
2314 if (lo->ldo_foreign_lmv == NULL)
2316 lo->ldo_foreign_lmv_size = size;
2317 lo->ldo_dir_is_foreign = 1;
2323 * Declare create striped md object.
2325 * The function declares intention to create a striped directory. This is a
2326 * wrapper for lod_prep_md_striped_create(). The only additional functionality
2327 * is to verify pattern \a lum_buf is good. Check that function for the details.
2329 * \param[in] env execution environment
2330 * \param[in] dt object
2331 * \param[in] attr attributes to initialize the objects with
2332 * \param[in] lum_buf a pattern specifying the number of stripes and
2334 * \param[in] dof type of objects to be created
2335 * \param[in] th transaction handle
2337 * \retval 0 on success
2338 * \retval negative if failed
2341 static int lod_declare_xattr_set_lmv(const struct lu_env *env,
2342 struct dt_object *dt,
2343 struct lu_attr *attr,
2344 const struct lu_buf *lum_buf,
2345 struct dt_object_format *dof,
2348 struct lod_object *lo = lod_dt_obj(dt);
2349 struct lmv_user_md_v1 *lum = lum_buf->lb_buf;
2353 LASSERT(lum != NULL);
2355 CDEBUG(D_INFO, "lum magic = %x count = %u offset = %d\n",
2356 le32_to_cpu(lum->lum_magic), le32_to_cpu(lum->lum_stripe_count),
2357 (int)le32_to_cpu(lum->lum_stripe_offset));
2359 if (lo->ldo_dir_stripe_count == 0) {
2360 if (lo->ldo_dir_is_foreign) {
2361 rc = lod_alloc_foreign_lmv(lo, lum_buf->lb_len);
2364 memcpy(lo->ldo_foreign_lmv, lum, lum_buf->lb_len);
2365 lo->ldo_dir_stripe_loaded = 1;
2370 /* prepare dir striped objects */
2371 rc = lod_prep_md_striped_create(env, dt, attr, lum, dof, th);
2373 /* failed to create striping, let's reset
2374 * config so that others don't get confused */
2375 lod_striping_free(env, lo);
2383 * Set or replace striped directory layout, and LFSCK may set layout on a plain
2384 * directory, so don't check stripe count.
2386 * \param[in] env execution environment
2387 * \param[in] dt target object
2388 * \param[in] buf LMV buf which contains source stripe fids
2389 * \param[in] fl set or replace
2390 * \param[in] th transaction handle
2392 * \retval 0 on success
2393 * \retval negative if failed
2395 static int lod_dir_layout_set(const struct lu_env *env,
2396 struct dt_object *dt,
2397 const struct lu_buf *buf,
2401 struct dt_object *next = dt_object_child(dt);
2402 struct lod_object *lo = lod_dt_obj(dt);
2403 struct lod_device *lod = lu2lod_dev(lod2lu_obj(lo)->lo_dev);
2404 struct lmv_mds_md_v1 *lmv = buf->lb_buf;
2405 struct lmv_mds_md_v1 *slave_lmv;
2406 struct lu_buf slave_buf;
2412 if (!lmv_is_sane2(lmv))
2415 /* adjust hash for dir merge, which may not be set in user command */
2416 if (lmv_is_merging(lmv) &&
2417 !(lmv->lmv_migrate_hash & LMV_HASH_TYPE_MASK))
2418 lmv->lmv_merge_hash |=
2419 lod->lod_mdt_descs.ltd_lmv_desc.ld_pattern &
2422 LMV_DEBUG(D_INFO, lmv, "set");
2424 rc = lod_sub_xattr_set(env, next, buf, XATTR_NAME_LMV, fl, th);
2428 /* directory restripe may update stripe LMV directly */
2429 if (!lo->ldo_dir_stripe_count)
2432 lo->ldo_dir_hash_type = le32_to_cpu(lmv->lmv_hash_type);
2433 lo->ldo_dir_migrate_offset = le32_to_cpu(lmv->lmv_migrate_offset);
2434 lo->ldo_dir_migrate_hash = le32_to_cpu(lmv->lmv_migrate_hash);
2435 lo->ldo_dir_layout_version = le32_to_cpu(lmv->lmv_layout_version);
2437 OBD_ALLOC_PTR(slave_lmv);
2441 lod_prep_slave_lmv_md(slave_lmv, lmv);
2442 slave_buf.lb_buf = slave_lmv;
2443 slave_buf.lb_len = sizeof(*slave_lmv);
2445 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
2446 if (!lo->ldo_stripe[i])
2449 if (!dt_object_exists(lo->ldo_stripe[i]))
2452 rc = lod_sub_xattr_set(env, lo->ldo_stripe[i], &slave_buf,
2453 XATTR_NAME_LMV, fl, th);
2458 OBD_FREE_PTR(slave_lmv);
2464 * Implementation of dt_object_operations::do_declare_xattr_set.
2466 * Used with regular (non-striped) objects. Basically it
2467 * initializes the striping information and applies the
2468 * change to all the stripes.
2470 * \see dt_object_operations::do_declare_xattr_set() in the API description
2473 static int lod_dir_declare_xattr_set(const struct lu_env *env,
2474 struct dt_object *dt,
2475 const struct lu_buf *buf,
2476 const char *name, int fl,
2479 struct dt_object *next = dt_object_child(dt);
2480 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
2481 struct lod_object *lo = lod_dt_obj(dt);
2486 if (strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0) {
2487 struct lmv_user_md_v1 *lum;
2489 LASSERT(buf != NULL && buf->lb_buf != NULL);
2491 rc = lod_verify_md_striping(d, lum);
2494 } else if (strcmp(name, XATTR_NAME_LOV) == 0) {
2495 rc = lod_verify_striping(env, d, lo, buf, false);
2500 rc = lod_sub_declare_xattr_set(env, next, buf, name, fl, th);
2504 /* Note: Do not set LinkEA on sub-stripes, otherwise
2505 * it will confuse the fid2path process(see mdt_path_current()).
2506 * The linkEA between master and sub-stripes is set in
2507 * lod_xattr_set_lmv(). */
2508 if (strcmp(name, XATTR_NAME_LINK) == 0)
2511 /* set xattr to each stripes, if needed */
2512 rc = lod_striping_load(env, lo);
2516 if (lo->ldo_dir_stripe_count == 0)
2519 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
2520 if (!lo->ldo_stripe[i])
2523 if (!dt_object_exists(lo->ldo_stripe[i]))
2526 rc = lod_sub_declare_xattr_set(env, lo->ldo_stripe[i],
2536 lod_obj_stripe_replace_parent_fid_cb(const struct lu_env *env,
2537 struct lod_object *lo,
2538 struct dt_object *dt, struct thandle *th,
2539 int comp_idx, int stripe_idx,
2540 struct lod_obj_stripe_cb_data *data)
2542 struct lod_thread_info *info = lod_env_info(env);
2543 struct lod_layout_component *comp = &lo->ldo_comp_entries[comp_idx];
2544 struct filter_fid *ff = &info->lti_ff;
2545 struct lu_buf *buf = &info->lti_buf;
2549 buf->lb_len = sizeof(*ff);
2550 rc = dt_xattr_get(env, dt, buf, XATTR_NAME_FID);
2558 * locd_buf is set if it's called by dir migration, which doesn't check
2561 if (data->locd_buf) {
2562 memset(ff, 0, sizeof(*ff));
2563 ff->ff_parent = *(struct lu_fid *)data->locd_buf->lb_buf;
2565 filter_fid_le_to_cpu(ff, ff, sizeof(*ff));
2567 if (lu_fid_eq(lod_object_fid(lo), &ff->ff_parent) &&
2568 ff->ff_layout.ol_comp_id == comp->llc_id)
2571 memset(ff, 0, sizeof(*ff));
2572 ff->ff_parent = *lu_object_fid(&lo->ldo_obj.do_lu);
2575 /* rewrite filter_fid */
2576 ff->ff_parent.f_ver = stripe_idx;
2577 ff->ff_layout.ol_stripe_size = comp->llc_stripe_size;
2578 ff->ff_layout.ol_stripe_count = comp->llc_stripe_count;
2579 ff->ff_layout.ol_comp_id = comp->llc_id;
2580 ff->ff_layout.ol_comp_start = comp->llc_extent.e_start;
2581 ff->ff_layout.ol_comp_end = comp->llc_extent.e_end;
2582 filter_fid_cpu_to_le(ff, ff, sizeof(*ff));
2584 if (data->locd_declare)
2585 rc = lod_sub_declare_xattr_set(env, dt, buf, XATTR_NAME_FID,
2586 LU_XATTR_REPLACE, th);
2588 rc = lod_sub_xattr_set(env, dt, buf, XATTR_NAME_FID,
2589 LU_XATTR_REPLACE, th);
2595 * Reset parent FID on OST object
2597 * Replace parent FID with @dt object FID, which is only called during migration
2598 * to reset the parent FID after the MDT object is migrated to the new MDT, i.e.
2599 * the FID is changed.
2601 * \param[in] env execution environment
2602 * \param[in] dt dt_object whose stripes's parent FID will be reset
2603 * \parem[in] th thandle
2604 * \param[in] declare if it is declare
2606 * \retval 0 if reset succeeds
2607 * \retval negative errno if reset fails
2609 static int lod_replace_parent_fid(const struct lu_env *env,
2610 struct dt_object *dt,
2611 const struct lu_buf *buf,
2612 struct thandle *th, bool declare)
2614 struct lod_object *lo = lod_dt_obj(dt);
2615 struct lod_thread_info *info = lod_env_info(env);
2616 struct filter_fid *ff;
2617 struct lod_obj_stripe_cb_data data = { { 0 } };
2621 LASSERT(S_ISREG(dt->do_lu.lo_header->loh_attr));
2623 /* set xattr to each stripes, if needed */
2624 rc = lod_striping_load(env, lo);
2628 if (!lod_obj_is_striped(dt))
2631 if (info->lti_ea_store_size < sizeof(*ff)) {
2632 rc = lod_ea_store_resize(info, sizeof(*ff));
2637 data.locd_declare = declare;
2638 data.locd_stripe_cb = lod_obj_stripe_replace_parent_fid_cb;
2639 data.locd_buf = buf;
2640 rc = lod_obj_for_each_stripe(env, lo, th, &data);
2645 __u16 lod_comp_entry_stripe_count(struct lod_object *lo,
2646 int comp_idx, bool is_dir)
2648 struct lod_device *lod = lu2lod_dev(lod2lu_obj(lo)->lo_dev);
2649 struct lod_layout_component *entry;
2654 entry = &lo->ldo_comp_entries[comp_idx];
2655 if (lod_comp_inited(entry))
2656 return entry->llc_stripe_count;
2657 else if ((__u16)-1 == entry->llc_stripe_count)
2658 return lod->lod_ost_count;
2660 return lod_get_stripe_count(lod, lo, comp_idx,
2661 entry->llc_stripe_count,
2662 entry->llc_pattern &
2663 LOV_PATTERN_OVERSTRIPING);
2666 static int lod_comp_md_size(struct lod_object *lo, bool is_dir)
2668 int magic, size = 0, i;
2669 struct lod_layout_component *comp_entries;
2671 bool is_composite, is_foreign = false;
2674 comp_cnt = lo->ldo_def_striping->lds_def_comp_cnt;
2675 comp_entries = lo->ldo_def_striping->lds_def_comp_entries;
2677 lo->ldo_def_striping->lds_def_striping_is_composite;
2679 comp_cnt = lo->ldo_comp_cnt;
2680 comp_entries = lo->ldo_comp_entries;
2681 is_composite = lo->ldo_is_composite;
2682 is_foreign = lo->ldo_is_foreign;
2686 return lo->ldo_foreign_lov_size;
2688 LASSERT(comp_cnt != 0 && comp_entries != NULL);
2690 size = sizeof(struct lov_comp_md_v1) +
2691 sizeof(struct lov_comp_md_entry_v1) * comp_cnt;
2692 LASSERT(size % sizeof(__u64) == 0);
2695 for (i = 0; i < comp_cnt; i++) {
2698 magic = comp_entries[i].llc_pool ? LOV_MAGIC_V3 : LOV_MAGIC_V1;
2699 stripe_count = lod_comp_entry_stripe_count(lo, i, is_dir);
2700 if (!is_dir && is_composite)
2701 lod_comp_shrink_stripe_count(&comp_entries[i],
2704 size += lov_user_md_size(stripe_count, magic);
2705 LASSERT(size % sizeof(__u64) == 0);
2711 * Declare component add. The xattr name is XATTR_LUSTRE_LOV.add, and
2712 * the xattr value is binary lov_comp_md_v1 which contains component(s)
2715 * \param[in] env execution environment
2716 * \param[in] dt dt_object to add components on
2717 * \param[in] buf buffer contains components to be added
2718 * \parem[in] th thandle
2720 * \retval 0 on success
2721 * \retval negative errno on failure
2723 static int lod_declare_layout_add(const struct lu_env *env,
2724 struct dt_object *dt,
2725 const struct lu_buf *buf,
2728 struct lod_thread_info *info = lod_env_info(env);
2729 struct lod_layout_component *comp_array, *lod_comp, *old_array;
2730 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
2731 struct dt_object *next = dt_object_child(dt);
2732 struct lov_desc *desc = &d->lod_ost_descs.ltd_lov_desc;
2733 struct lod_object *lo = lod_dt_obj(dt);
2734 struct lov_user_md_v3 *v3;
2735 struct lov_comp_md_v1 *comp_v1 = buf->lb_buf;
2737 int i, rc, array_cnt, old_array_cnt;
2740 LASSERT(lo->ldo_is_composite);
2742 if (lo->ldo_flr_state != LCM_FL_NONE)
2745 rc = lod_verify_striping(env, d, lo, buf, false);
2749 magic = comp_v1->lcm_magic;
2750 if (magic == __swab32(LOV_USER_MAGIC_COMP_V1)) {
2751 lustre_swab_lov_comp_md_v1(comp_v1);
2752 magic = comp_v1->lcm_magic;
2755 if (magic != LOV_USER_MAGIC_COMP_V1)
2758 mutex_lock(&lo->ldo_layout_mutex);
2760 array_cnt = lo->ldo_comp_cnt + comp_v1->lcm_entry_count;
2761 OBD_ALLOC_PTR_ARRAY(comp_array, array_cnt);
2762 if (comp_array == NULL) {
2763 mutex_unlock(&lo->ldo_layout_mutex);
2768 memcpy(comp_array, lo->ldo_comp_entries,
2769 sizeof(*comp_array) * lo->ldo_comp_cnt);
2771 for (i = 0; i < comp_v1->lcm_entry_count; i++) {
2772 struct lov_user_md_v1 *v1;
2773 struct lu_extent *ext;
2775 v1 = (struct lov_user_md *)((char *)comp_v1 +
2776 comp_v1->lcm_entries[i].lcme_offset);
2777 ext = &comp_v1->lcm_entries[i].lcme_extent;
2779 lod_comp = &comp_array[lo->ldo_comp_cnt + i];
2780 lod_comp->llc_extent.e_start = ext->e_start;
2781 lod_comp->llc_extent.e_end = ext->e_end;
2782 lod_comp->llc_stripe_offset = v1->lmm_stripe_offset;
2783 lod_comp->llc_flags = comp_v1->lcm_entries[i].lcme_flags;
2785 lod_comp->llc_stripe_count = v1->lmm_stripe_count;
2786 lod_comp->llc_stripe_size = v1->lmm_stripe_size;
2787 lod_adjust_stripe_info(lod_comp, desc, 0);
2789 if (v1->lmm_magic == LOV_USER_MAGIC_V3) {
2790 v3 = (struct lov_user_md_v3 *) v1;
2791 if (v3->lmm_pool_name[0] != '\0') {
2792 rc = lod_set_pool(&lod_comp->llc_pool,
2800 old_array = lo->ldo_comp_entries;
2801 old_array_cnt = lo->ldo_comp_cnt;
2803 lo->ldo_comp_entries = comp_array;
2804 lo->ldo_comp_cnt = array_cnt;
2806 /* No need to increase layout generation here, it will be increased
2807 * later when generating component ID for the new components */
2809 info->lti_buf.lb_len = lod_comp_md_size(lo, false);
2810 rc = lod_sub_declare_xattr_set(env, next, &info->lti_buf,
2811 XATTR_NAME_LOV, 0, th);
2813 lo->ldo_comp_entries = old_array;
2814 lo->ldo_comp_cnt = old_array_cnt;
2818 OBD_FREE_PTR_ARRAY(old_array, old_array_cnt);
2820 LASSERT(lo->ldo_mirror_count == 1);
2821 lo->ldo_mirrors[0].lme_end = array_cnt - 1;
2823 mutex_unlock(&lo->ldo_layout_mutex);
2828 for (i = lo->ldo_comp_cnt; i < array_cnt; i++) {
2829 lod_comp = &comp_array[i];
2830 if (lod_comp->llc_pool != NULL) {
2831 OBD_FREE(lod_comp->llc_pool,
2832 strlen(lod_comp->llc_pool) + 1);
2833 lod_comp->llc_pool = NULL;
2836 OBD_FREE_PTR_ARRAY(comp_array, array_cnt);
2837 mutex_unlock(&lo->ldo_layout_mutex);
2843 * lod_last_non_stale_mirror() - Check if a mirror is the last non-stale mirror.
2844 * @mirror_id: Mirror id to be checked.
2847 * This function checks if a mirror with specified @mirror_id is the last
2848 * non-stale mirror of a LOD object @lo.
2850 * Return: true or false.
2853 bool lod_last_non_stale_mirror(__u16 mirror_id, struct lod_object *lo)
2855 struct lod_layout_component *lod_comp;
2856 bool has_stale_flag;
2859 for (i = 0; i < lo->ldo_mirror_count; i++) {
2860 if (lo->ldo_mirrors[i].lme_id == mirror_id ||
2861 lo->ldo_mirrors[i].lme_stale)
2864 has_stale_flag = false;
2865 lod_foreach_mirror_comp(lod_comp, lo, i) {
2866 if (lod_comp->llc_flags & LCME_FL_STALE) {
2867 has_stale_flag = true;
2871 if (!has_stale_flag)
2879 * Declare component set. The xattr is name XATTR_LUSTRE_LOV.set.$field,
2880 * the '$field' can only be 'flags' now. The xattr value is binary
2881 * lov_comp_md_v1 which contains the component ID(s) and the value of
2882 * the field to be modified.
2883 * Please update allowed_lustre_lov macro if $field groks more values
2886 * \param[in] env execution environment
2887 * \param[in] dt dt_object to be modified
2888 * \param[in] op operation string, like "set.flags"
2889 * \param[in] buf buffer contains components to be set
2890 * \parem[in] th thandle
2892 * \retval 0 on success
2893 * \retval negative errno on failure
2895 static int lod_declare_layout_set(const struct lu_env *env,
2896 struct dt_object *dt,
2897 char *op, const struct lu_buf *buf,
2900 struct lod_layout_component *lod_comp;
2901 struct lod_thread_info *info = lod_env_info(env);
2902 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
2903 struct lod_object *lo = lod_dt_obj(dt);
2904 struct lov_comp_md_v1 *comp_v1 = buf->lb_buf;
2907 bool changed = false;
2910 /* Please update allowed_lustre_lov macro if op
2911 * groks more values in the future
2913 if (strcmp(op, "set.flags") != 0) {
2914 CDEBUG(D_LAYOUT, "%s: operation (%s) not supported.\n",
2915 lod2obd(d)->obd_name, op);
2919 magic = comp_v1->lcm_magic;
2920 if (magic == __swab32(LOV_USER_MAGIC_COMP_V1)) {
2921 lustre_swab_lov_comp_md_v1(comp_v1);
2922 magic = comp_v1->lcm_magic;
2925 if (magic != LOV_USER_MAGIC_COMP_V1)
2928 if (comp_v1->lcm_entry_count == 0) {
2929 CDEBUG(D_LAYOUT, "%s: entry count is zero.\n",
2930 lod2obd(d)->obd_name);
2934 mutex_lock(&lo->ldo_layout_mutex);
2935 for (i = 0; i < comp_v1->lcm_entry_count; i++) {
2936 __u32 id = comp_v1->lcm_entries[i].lcme_id;
2937 __u32 flags = comp_v1->lcm_entries[i].lcme_flags;
2938 __u32 mirror_flag = flags & LCME_MIRROR_FLAGS;
2939 __u16 mirror_id = mirror_id_of(id);
2940 bool neg = flags & LCME_FL_NEG;
2942 if (flags & LCME_FL_INIT) {
2944 lod_striping_free_nolock(env, lo);
2945 mutex_unlock(&lo->ldo_layout_mutex);
2949 flags &= ~(LCME_MIRROR_FLAGS | LCME_FL_NEG);
2950 for (j = 0; j < lo->ldo_comp_cnt; j++) {
2951 lod_comp = &lo->ldo_comp_entries[j];
2953 /* lfs only put one flag in each entry */
2954 if ((flags && id != lod_comp->llc_id) ||
2955 (mirror_flag && mirror_id !=
2956 mirror_id_of(lod_comp->llc_id)))
2961 lod_comp->llc_flags &= ~flags;
2963 lod_comp->llc_flags &= ~mirror_flag;
2966 if ((flags & LCME_FL_STALE) &&
2967 lod_last_non_stale_mirror(mirror_id,
2970 &lo->ldo_layout_mutex);
2973 lod_comp->llc_flags |= flags;
2976 lod_comp->llc_flags |= mirror_flag;
2977 if (mirror_flag & LCME_FL_NOSYNC)
2978 lod_comp->llc_timestamp =
2979 ktime_get_real_seconds();
2985 mutex_unlock(&lo->ldo_layout_mutex);
2988 CDEBUG(D_LAYOUT, "%s: requested component(s) not found.\n",
2989 lod2obd(d)->obd_name);
2993 lod_obj_inc_layout_gen(lo);
2995 info->lti_buf.lb_len = lod_comp_md_size(lo, false);
2996 rc = lod_sub_declare_xattr_set(env, dt_object_child(dt), &info->lti_buf,
2997 XATTR_NAME_LOV, LU_XATTR_REPLACE, th);
3002 * Declare component deletion. The xattr name is XATTR_LUSTRE_LOV.del,
3003 * and the xattr value is a unique component ID or a special lcme_id.
3005 * \param[in] env execution environment
3006 * \param[in] dt dt_object to be operated on
3007 * \param[in] buf buffer contains component ID or lcme_id
3008 * \parem[in] th thandle
3010 * \retval 0 on success
3011 * \retval negative errno on failure
3013 static int lod_declare_layout_del(const struct lu_env *env,
3014 struct dt_object *dt,
3015 const struct lu_buf *buf,
3018 struct lod_thread_info *info = lod_env_info(env);
3019 struct dt_object *next = dt_object_child(dt);
3020 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
3021 struct lod_object *lo = lod_dt_obj(dt);
3022 struct lu_attr *attr = &lod_env_info(env)->lti_attr;
3023 struct lov_comp_md_v1 *comp_v1 = buf->lb_buf;
3024 __u32 magic, id, flags, neg_flags = 0;
3028 LASSERT(lo->ldo_is_composite);
3030 if (lo->ldo_flr_state != LCM_FL_NONE)
3033 magic = comp_v1->lcm_magic;
3034 if (magic == __swab32(LOV_USER_MAGIC_COMP_V1)) {
3035 lustre_swab_lov_comp_md_v1(comp_v1);
3036 magic = comp_v1->lcm_magic;
3039 if (magic != LOV_USER_MAGIC_COMP_V1)
3042 id = comp_v1->lcm_entries[0].lcme_id;
3043 flags = comp_v1->lcm_entries[0].lcme_flags;
3045 if (id > LCME_ID_MAX || (flags & ~LCME_KNOWN_FLAGS)) {
3046 CDEBUG(D_LAYOUT, "%s: invalid component id %#x, flags %#x\n",
3047 lod2obd(d)->obd_name, id, flags);
3051 if (id != LCME_ID_INVAL && flags != 0) {
3052 CDEBUG(D_LAYOUT, "%s: specified both id and flags.\n",
3053 lod2obd(d)->obd_name);
3057 if (id == LCME_ID_INVAL && !flags) {
3058 CDEBUG(D_LAYOUT, "%s: no id or flags specified.\n",
3059 lod2obd(d)->obd_name);
3063 if (flags & LCME_FL_NEG) {
3064 neg_flags = flags & ~LCME_FL_NEG;
3068 mutex_lock(&lo->ldo_layout_mutex);
3070 left = lo->ldo_comp_cnt;
3072 mutex_unlock(&lo->ldo_layout_mutex);
3076 for (i = (lo->ldo_comp_cnt - 1); i >= 0; i--) {
3077 struct lod_layout_component *lod_comp;
3079 lod_comp = &lo->ldo_comp_entries[i];
3081 if (id != LCME_ID_INVAL && id != lod_comp->llc_id)
3083 else if (flags && !(flags & lod_comp->llc_flags))
3085 else if (neg_flags && (neg_flags & lod_comp->llc_flags))
3088 if (left != (i + 1)) {
3089 CDEBUG(D_LAYOUT, "%s: this deletion will create "
3090 "a hole.\n", lod2obd(d)->obd_name);
3091 mutex_unlock(&lo->ldo_layout_mutex);
3096 /* Mark the component as deleted */
3097 lod_comp->llc_id = LCME_ID_INVAL;
3099 /* Not instantiated component */
3100 if (lod_comp->llc_stripe == NULL)
3103 LASSERT(lod_comp->llc_stripe_count > 0);
3104 for (j = 0; j < lod_comp->llc_stripe_count; j++) {
3105 struct dt_object *obj = lod_comp->llc_stripe[j];
3109 rc = lod_sub_declare_destroy(env, obj, th);
3111 mutex_unlock(&lo->ldo_layout_mutex);
3117 LASSERTF(left >= 0, "left = %d\n", left);
3118 if (left == lo->ldo_comp_cnt) {
3119 CDEBUG(D_LAYOUT, "%s: requested component id:%#x not found\n",
3120 lod2obd(d)->obd_name, id);
3121 mutex_unlock(&lo->ldo_layout_mutex);
3125 mutex_unlock(&lo->ldo_layout_mutex);
3127 memset(attr, 0, sizeof(*attr));
3128 attr->la_valid = LA_SIZE;
3129 rc = lod_sub_declare_attr_set(env, next, attr, th);
3134 info->lti_buf.lb_len = lod_comp_md_size(lo, false);
3135 rc = lod_sub_declare_xattr_set(env, next, &info->lti_buf,
3136 XATTR_NAME_LOV, 0, th);
3138 rc = lod_sub_declare_xattr_del(env, next, XATTR_NAME_LOV, th);
3145 * Declare layout add/set/del operations issued by special xattr names:
3147 * XATTR_LUSTRE_LOV.add add component(s) to existing file
3148 * XATTR_LUSTRE_LOV.del delete component(s) from existing file
3149 * XATTR_LUSTRE_LOV.set.$field set specified field of certain component(s)
3151 * \param[in] env execution environment
3152 * \param[in] dt object
3153 * \param[in] name name of xattr
3154 * \param[in] buf lu_buf contains xattr value
3155 * \param[in] th transaction handle
3157 * \retval 0 on success
3158 * \retval negative if failed
3160 static int lod_declare_modify_layout(const struct lu_env *env,
3161 struct dt_object *dt,
3163 const struct lu_buf *buf,
3166 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
3167 struct lod_object *lo = lod_dt_obj(dt);
3169 int rc, len = strlen(XATTR_LUSTRE_LOV);
3172 LASSERT(dt_object_exists(dt));
3174 if (strlen(name) <= len || name[len] != '.') {
3175 CDEBUG(D_LAYOUT, "%s: invalid xattr name: %s\n",
3176 lod2obd(d)->obd_name, name);
3181 rc = lod_striping_load(env, lo);
3185 /* the layout to be modified must be a composite layout */
3186 if (!lo->ldo_is_composite) {
3187 CDEBUG(D_LAYOUT, "%s: object "DFID" isn't a composite file.\n",
3188 lod2obd(d)->obd_name, PFID(lu_object_fid(&dt->do_lu)));
3189 GOTO(unlock, rc = -EINVAL);
3192 op = (char *)name + len;
3193 if (strcmp(op, "add") == 0) {
3194 rc = lod_declare_layout_add(env, dt, buf, th);
3195 } else if (strcmp(op, "del") == 0) {
3196 rc = lod_declare_layout_del(env, dt, buf, th);
3197 } else if (strncmp(op, "set", strlen("set")) == 0) {
3198 rc = lod_declare_layout_set(env, dt, op, buf, th);
3200 CDEBUG(D_LAYOUT, "%s: unsupported xattr name:%s\n",
3201 lod2obd(d)->obd_name, name);
3202 GOTO(unlock, rc = -ENOTSUPP);