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 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 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(lod->lod_lmv_failout ? D_ERROR : D_INFO,
924 "%s: invalid shard name %.*s with the FID "DFID
925 " for the striped directory "DFID", %s\n",
926 lod2obd(lod)->obd_name, ent->lde_namelen,
927 ent->lde_name, PFID(&fid),
928 PFID(lu_object_fid(&obj->do_lu)),
929 lod->lod_lmv_failout ? "failout" : "skip");
931 if (lod->lod_lmv_failout)
939 if (ent->lde_name[len] < '0' ||
940 ent->lde_name[len] > '9') {
941 CDEBUG(lod->lod_lmv_failout ? D_ERROR : D_INFO,
942 "%s: invalid shard name %.*s with the "
943 "FID "DFID" for the striped directory "
945 lod2obd(lod)->obd_name, ent->lde_namelen,
946 ent->lde_name, PFID(&fid),
947 PFID(lu_object_fid(&obj->do_lu)),
948 lod->lod_lmv_failout ?
951 if (lod->lod_lmv_failout)
957 index = index * 10 + ent->lde_name[len++] - '0';
958 } while (len < ent->lde_namelen);
960 if (len == ent->lde_namelen) {
961 /* Out of LMV EA range. */
962 if (index >= stripes) {
963 CERROR("%s: the shard %.*s for the striped "
964 "directory "DFID" is out of the known "
965 "LMV EA range [0 - %u], failout\n",
966 lod2obd(lod)->obd_name, ent->lde_namelen,
968 PFID(lu_object_fid(&obj->do_lu)),
974 /* The slot has been occupied. */
975 if (!fid_is_zero(&lmv1->lmv_stripe_fids[index])) {
979 &lmv1->lmv_stripe_fids[index]);
980 CERROR("%s: both the shard "DFID" and "DFID
981 " for the striped directory "DFID
982 " claim the same LMV EA slot at the "
983 "index %d, failout\n",
984 lod2obd(lod)->obd_name,
985 PFID(&fid0), PFID(&fid),
986 PFID(lu_object_fid(&obj->do_lu)), index);
991 /* stored as LE mode */
992 lmv1->lmv_stripe_fids[index] = ent->lde_fid;
995 rc = iops->next(env, it);
1000 iops->fini(env, it);
1002 RETURN(rc > 0 ? lmv_mds_md_size(stripes, magic) : rc);
1006 * Implementation of dt_object_operations::do_index_try.
1008 * \see dt_object_operations::do_index_try() in the API description for details.
1010 static int lod_index_try(const struct lu_env *env, struct dt_object *dt,
1011 const struct dt_index_features *feat)
1013 struct lod_object *lo = lod_dt_obj(dt);
1014 struct dt_object *next = dt_object_child(dt);
1018 LASSERT(next->do_ops);
1019 LASSERT(next->do_ops->do_index_try);
1021 rc = lod_striping_load(env, lo);
1025 rc = next->do_ops->do_index_try(env, next, feat);
1029 if (lo->ldo_dir_stripe_count > 0) {
1032 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
1033 if (!lo->ldo_stripe[i])
1035 if (!dt_object_exists(lo->ldo_stripe[i]))
1037 rc = lo->ldo_stripe[i]->do_ops->do_index_try(env,
1038 lo->ldo_stripe[i], feat);
1042 dt->do_index_ops = &lod_striped_index_ops;
1044 dt->do_index_ops = &lod_index_ops;
1051 * Implementation of dt_object_operations::do_read_lock.
1053 * \see dt_object_operations::do_read_lock() in the API description for details.
1055 static void lod_read_lock(const struct lu_env *env, struct dt_object *dt,
1058 dt_read_lock(env, dt_object_child(dt), role);
1062 * Implementation of dt_object_operations::do_write_lock.
1064 * \see dt_object_operations::do_write_lock() in the API description for
1067 static void lod_write_lock(const struct lu_env *env, struct dt_object *dt,
1070 dt_write_lock(env, dt_object_child(dt), role);
1074 * Implementation of dt_object_operations::do_read_unlock.
1076 * \see dt_object_operations::do_read_unlock() in the API description for
1079 static void lod_read_unlock(const struct lu_env *env, struct dt_object *dt)
1081 dt_read_unlock(env, dt_object_child(dt));
1085 * Implementation of dt_object_operations::do_write_unlock.
1087 * \see dt_object_operations::do_write_unlock() in the API description for
1090 static void lod_write_unlock(const struct lu_env *env, struct dt_object *dt)
1092 dt_write_unlock(env, dt_object_child(dt));
1096 * Implementation of dt_object_operations::do_write_locked.
1098 * \see dt_object_operations::do_write_locked() in the API description for
1101 static int lod_write_locked(const struct lu_env *env, struct dt_object *dt)
1103 return dt_write_locked(env, dt_object_child(dt));
1107 * Implementation of dt_object_operations::do_attr_get.
1109 * \see dt_object_operations::do_attr_get() in the API description for details.
1111 static int lod_attr_get(const struct lu_env *env,
1112 struct dt_object *dt,
1113 struct lu_attr *attr)
1115 /* Note: for striped directory, client will merge attributes
1116 * from all of the sub-stripes see lmv_merge_attr(), and there
1117 * no MDD logic depend on directory nlink/size/time, so we can
1118 * always use master inode nlink and size for now. */
1119 return dt_attr_get(env, dt_object_child(dt), attr);
1122 void lod_adjust_stripe_size(struct lod_layout_component *comp,
1123 __u32 def_stripe_size)
1125 __u64 comp_end = comp->llc_extent.e_end;
1127 /* Choose stripe size if not set. Note that default stripe size can't
1128 * be used as is, because it must be multiplier of given component end.
1129 * - first check if default stripe size can be used
1130 * - if not than select the lowest set bit from component end and use
1131 * that value as stripe size
1133 if (!comp->llc_stripe_size) {
1134 if (comp_end == LUSTRE_EOF || !(comp_end % def_stripe_size))
1135 comp->llc_stripe_size = def_stripe_size;
1137 comp->llc_stripe_size = comp_end & ~(comp_end - 1);
1139 /* check stripe size is multiplier of comp_end */
1140 if (comp_end != LUSTRE_EOF &&
1141 comp_end % comp->llc_stripe_size) {
1142 /* fix that even for defined stripe size but warn
1143 * about the problem, that must not happen
1145 CWARN("Component end %llu is not aligned by the stripe size %u\n",
1146 comp_end, comp->llc_stripe_size);
1148 comp->llc_stripe_size = comp_end & ~(comp_end - 1);
1153 static inline void lod_adjust_stripe_info(struct lod_layout_component *comp,
1154 struct lov_desc *desc,
1157 if (comp->llc_pattern != LOV_PATTERN_MDT) {
1158 if (append_stripes) {
1159 comp->llc_stripe_count = append_stripes;
1160 } else if (!comp->llc_stripe_count) {
1161 comp->llc_stripe_count =
1162 desc->ld_default_stripe_count;
1166 lod_adjust_stripe_size(comp, desc->ld_default_stripe_size);
1169 int lod_obj_for_each_stripe(const struct lu_env *env, struct lod_object *lo,
1171 struct lod_obj_stripe_cb_data *data)
1173 struct lod_layout_component *lod_comp;
1177 LASSERT(lo->ldo_comp_cnt != 0 && lo->ldo_comp_entries != NULL);
1178 for (i = 0; i < lo->ldo_comp_cnt; i++) {
1179 lod_comp = &lo->ldo_comp_entries[i];
1181 if (lod_comp->llc_stripe == NULL)
1184 /* has stripe but not inited yet, this component has been
1185 * declared to be created, but hasn't created yet.
1187 if (!lod_comp_inited(lod_comp))
1190 if (data->locd_comp_skip_cb &&
1191 data->locd_comp_skip_cb(env, lo, i, data))
1194 if (data->locd_comp_cb) {
1195 rc = data->locd_comp_cb(env, lo, i, data);
1200 /* could used just to do sth about component, not each
1203 if (!data->locd_stripe_cb)
1206 LASSERT(lod_comp->llc_stripe_count > 0);
1207 for (j = 0; j < lod_comp->llc_stripe_count; j++) {
1208 struct dt_object *dt = lod_comp->llc_stripe[j];
1212 rc = data->locd_stripe_cb(env, lo, dt, th, i, j, data);
1220 static bool lod_obj_attr_set_comp_skip_cb(const struct lu_env *env,
1221 struct lod_object *lo, int comp_idx,
1222 struct lod_obj_stripe_cb_data *data)
1224 struct lod_layout_component *lod_comp = &lo->ldo_comp_entries[comp_idx];
1225 bool skipped = false;
1227 if (!(data->locd_attr->la_valid & LA_LAYOUT_VERSION))
1230 switch (lo->ldo_flr_state) {
1231 case LCM_FL_WRITE_PENDING: {
1234 /* skip stale components */
1235 if (lod_comp->llc_flags & LCME_FL_STALE) {
1240 /* skip valid and overlapping components, therefore any
1241 * attempts to write overlapped components will never succeed
1242 * because client will get EINPROGRESS. */
1243 for (i = 0; i < lo->ldo_comp_cnt; i++) {
1247 if (lo->ldo_comp_entries[i].llc_flags & LCME_FL_STALE)
1250 if (lu_extent_is_overlapped(&lod_comp->llc_extent,
1251 &lo->ldo_comp_entries[i].llc_extent)) {
1259 LASSERTF(0, "impossible: %d\n", lo->ldo_flr_state);
1260 case LCM_FL_SYNC_PENDING:
1264 CDEBUG(D_LAYOUT, DFID": %s to set component %x to version: %u\n",
1265 PFID(lu_object_fid(&lo->ldo_obj.do_lu)),
1266 skipped ? "skipped" : "chose", lod_comp->llc_id,
1267 data->locd_attr->la_layout_version);
1273 lod_obj_stripe_attr_set_cb(const struct lu_env *env, struct lod_object *lo,
1274 struct dt_object *dt, struct thandle *th,
1275 int comp_idx, int stripe_idx,
1276 struct lod_obj_stripe_cb_data *data)
1278 if (data->locd_declare)
1279 return lod_sub_declare_attr_set(env, dt, data->locd_attr, th);
1281 if (data->locd_attr->la_valid & LA_LAYOUT_VERSION) {
1282 CDEBUG(D_LAYOUT, DFID": set layout version: %u, comp_idx: %d\n",
1283 PFID(lu_object_fid(&dt->do_lu)),
1284 data->locd_attr->la_layout_version, comp_idx);
1287 return lod_sub_attr_set(env, dt, data->locd_attr, th);
1291 * Implementation of dt_object_operations::do_declare_attr_set.
1293 * If the object is striped, then apply the changes to all the stripes.
1295 * \see dt_object_operations::do_declare_attr_set() in the API description
1298 static int lod_declare_attr_set(const struct lu_env *env,
1299 struct dt_object *dt,
1300 const struct lu_attr *attr,
1303 struct dt_object *next = dt_object_child(dt);
1304 struct lod_object *lo = lod_dt_obj(dt);
1309 * declare setattr on the local object
1311 rc = lod_sub_declare_attr_set(env, next, attr, th);
1315 /* osp_declare_attr_set() ignores all attributes other than
1316 * UID, GID, PROJID, and size, and osp_attr_set() ignores all
1317 * but UID, GID and PROJID. Declaration of size attr setting
1318 * happens through lod_declare_init_size(), and not through
1319 * this function. Therefore we need not load striping unless
1320 * ownership is changing. This should save memory and (we hope)
1321 * speed up rename().
1323 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
1324 if (!(attr->la_valid & LA_REMOTE_ATTR_SET))
1327 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_OWNER))
1330 if (!(attr->la_valid & (LA_UID | LA_GID | LA_PROJID | LA_MODE |
1331 LA_ATIME | LA_MTIME | LA_CTIME |
1336 * load striping information, notice we don't do this when object
1337 * is being initialized as we don't need this information till
1338 * few specific cases like destroy, chown
1340 rc = lod_striping_load(env, lo);
1344 if (!lod_obj_is_striped(dt))
1348 * if object is striped declare changes on the stripes
1350 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
1351 LASSERT(lo->ldo_stripe);
1352 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
1353 if (lo->ldo_stripe[i] == NULL)
1355 if (!dt_object_exists(lo->ldo_stripe[i]))
1357 rc = lod_sub_declare_attr_set(env, lo->ldo_stripe[i],
1363 struct lod_obj_stripe_cb_data data = { { 0 } };
1365 data.locd_attr = attr;
1366 data.locd_declare = true;
1367 data.locd_stripe_cb = lod_obj_stripe_attr_set_cb;
1368 rc = lod_obj_for_each_stripe(env, lo, th, &data);
1374 if (!dt_object_exists(next) || dt_object_remote(next) ||
1375 !S_ISREG(attr->la_mode))
1378 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_STRIPE)) {
1379 rc = lod_sub_declare_xattr_del(env, next, XATTR_NAME_LOV, th);
1383 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CHANGE_STRIPE) ||
1384 OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PFL_RANGE)) {
1385 struct lod_thread_info *info = lod_env_info(env);
1386 struct lu_buf *buf = &info->lti_buf;
1388 buf->lb_buf = info->lti_ea_store;
1389 buf->lb_len = info->lti_ea_store_size;
1390 rc = lod_sub_declare_xattr_set(env, next, buf, XATTR_NAME_LOV,
1391 LU_XATTR_REPLACE, th);
1398 * Implementation of dt_object_operations::do_attr_set.
1400 * If the object is striped, then apply the changes to all or subset of
1401 * the stripes depending on the object type and specific attributes.
1403 * \see dt_object_operations::do_attr_set() in the API description for details.
1405 static int lod_attr_set(const struct lu_env *env,
1406 struct dt_object *dt,
1407 const struct lu_attr *attr,
1410 struct dt_object *next = dt_object_child(dt);
1411 struct lod_object *lo = lod_dt_obj(dt);
1416 * apply changes to the local object
1418 rc = lod_sub_attr_set(env, next, attr, th);
1422 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
1423 if (!(attr->la_valid & LA_REMOTE_ATTR_SET))
1426 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_OWNER))
1429 if (!(attr->la_valid & (LA_UID | LA_GID | LA_MODE | LA_PROJID |
1430 LA_ATIME | LA_MTIME | LA_CTIME |
1435 /* FIXME: a tricky case in the code path of mdd_layout_change():
1436 * the in-memory striping information has been freed in lod_xattr_set()
1437 * due to layout change. It has to load stripe here again. It only
1438 * changes flags of layout so declare_attr_set() is still accurate */
1439 rc = lod_striping_load(env, lo);
1443 if (!lod_obj_is_striped(dt))
1447 * if object is striped, apply changes to all the stripes
1449 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
1450 LASSERT(lo->ldo_stripe);
1451 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
1452 if (unlikely(lo->ldo_stripe[i] == NULL))
1455 if ((dt_object_exists(lo->ldo_stripe[i]) == 0))
1458 rc = lod_sub_attr_set(env, lo->ldo_stripe[i], attr, th);
1463 struct lod_obj_stripe_cb_data data = { { 0 } };
1465 data.locd_attr = attr;
1466 data.locd_declare = false;
1467 data.locd_comp_skip_cb = lod_obj_attr_set_comp_skip_cb;
1468 data.locd_stripe_cb = lod_obj_stripe_attr_set_cb;
1469 rc = lod_obj_for_each_stripe(env, lo, th, &data);
1475 if (!dt_object_exists(next) || dt_object_remote(next) ||
1476 !S_ISREG(attr->la_mode))
1479 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_STRIPE)) {
1480 rc = lod_sub_xattr_del(env, next, XATTR_NAME_LOV, th);
1484 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CHANGE_STRIPE)) {
1485 struct lod_thread_info *info = lod_env_info(env);
1486 struct lu_buf *buf = &info->lti_buf;
1487 struct ost_id *oi = &info->lti_ostid;
1488 struct lu_fid *fid = &info->lti_fid;
1489 struct lov_mds_md_v1 *lmm;
1490 struct lov_ost_data_v1 *objs;
1493 rc = lod_get_lov_ea(env, lo);
1497 buf->lb_buf = info->lti_ea_store;
1498 buf->lb_len = info->lti_ea_store_size;
1499 lmm = info->lti_ea_store;
1500 magic = le32_to_cpu(lmm->lmm_magic);
1501 if (magic == LOV_MAGIC_COMP_V1 || magic == LOV_MAGIC_SEL) {
1502 struct lov_comp_md_v1 *lcm = buf->lb_buf;
1503 struct lov_comp_md_entry_v1 *lcme =
1504 &lcm->lcm_entries[0];
1506 lmm = buf->lb_buf + le32_to_cpu(lcme->lcme_offset);
1507 magic = le32_to_cpu(lmm->lmm_magic);
1510 if (magic == LOV_MAGIC_V1)
1511 objs = &(lmm->lmm_objects[0]);
1513 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
1514 ostid_le_to_cpu(&objs->l_ost_oi, oi);
1515 ostid_to_fid(fid, oi, le32_to_cpu(objs->l_ost_idx));
1517 fid_to_ostid(fid, oi);
1518 ostid_cpu_to_le(oi, &objs->l_ost_oi);
1520 rc = lod_sub_xattr_set(env, next, buf, XATTR_NAME_LOV,
1521 LU_XATTR_REPLACE, th);
1522 } else if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PFL_RANGE)) {
1523 struct lod_thread_info *info = lod_env_info(env);
1524 struct lu_buf *buf = &info->lti_buf;
1525 struct lov_comp_md_v1 *lcm;
1526 struct lov_comp_md_entry_v1 *lcme;
1528 rc = lod_get_lov_ea(env, lo);
1532 buf->lb_buf = info->lti_ea_store;
1533 buf->lb_len = info->lti_ea_store_size;
1535 if (le32_to_cpu(lcm->lcm_magic) != LOV_MAGIC_COMP_V1 &&
1536 le32_to_cpu(lcm->lcm_magic) != LOV_MAGIC_SEL)
1539 le32_add_cpu(&lcm->lcm_layout_gen, 1);
1540 lcme = &lcm->lcm_entries[0];
1541 le64_add_cpu(&lcme->lcme_extent.e_start, 1);
1542 le64_add_cpu(&lcme->lcme_extent.e_end, -1);
1544 rc = lod_sub_xattr_set(env, next, buf, XATTR_NAME_LOV,
1545 LU_XATTR_REPLACE, th);
1552 * Implementation of dt_object_operations::do_xattr_get.
1554 * If LOV EA is requested from the root object and it's not
1555 * found, then return default striping for the filesystem.
1557 * \see dt_object_operations::do_xattr_get() in the API description for details.
1559 static int lod_xattr_get(const struct lu_env *env, struct dt_object *dt,
1560 struct lu_buf *buf, const char *name)
1562 struct lod_thread_info *info = lod_env_info(env);
1563 struct lod_device *dev = lu2lod_dev(dt->do_lu.lo_dev);
1568 rc = dt_xattr_get(env, dt_object_child(dt), buf, name);
1569 if (strcmp(name, XATTR_NAME_LMV) == 0) {
1570 struct lmv_mds_md_v1 *lmv1;
1571 struct lmv_foreign_md *lfm;
1574 if (rc > (typeof(rc))sizeof(*lmv1))
1577 /* short (<= sizeof(struct lmv_mds_md_v1)) foreign LMV case */
1578 /* XXX empty foreign LMV is not allowed */
1579 if (rc <= offsetof(typeof(*lfm), lfm_value))
1580 RETURN(rc = rc > 0 ? -EINVAL : rc);
1582 if (buf->lb_buf == NULL || buf->lb_len == 0) {
1583 BUILD_BUG_ON(sizeof(*lmv1) > sizeof(info->lti_key));
1585 /* lti_buf is large enough for *lmv1 or a short
1586 * (<= sizeof(struct lmv_mds_md_v1)) foreign LMV
1588 info->lti_buf.lb_buf = info->lti_key;
1589 info->lti_buf.lb_len = sizeof(*lmv1);
1590 rc = dt_xattr_get(env, dt_object_child(dt),
1591 &info->lti_buf, name);
1592 if (unlikely(rc <= offsetof(typeof(*lfm),
1594 RETURN(rc = rc > 0 ? -EINVAL : rc);
1596 lfm = info->lti_buf.lb_buf;
1597 if (le32_to_cpu(lfm->lfm_magic) == LMV_MAGIC_FOREIGN)
1600 if (unlikely(rc != sizeof(*lmv1)))
1601 RETURN(rc = rc > 0 ? -EINVAL : rc);
1603 lmv1 = info->lti_buf.lb_buf;
1604 /* The on-disk LMV EA only contains header, but the
1605 * returned LMV EA size should contain the space for
1606 * the FIDs of all shards of the striped directory. */
1607 if (le32_to_cpu(lmv1->lmv_magic) == LMV_MAGIC_V1)
1608 rc = lmv_mds_md_size(
1609 le32_to_cpu(lmv1->lmv_stripe_count),
1610 le32_to_cpu(lmv1->lmv_magic));
1613 if (le32_to_cpu(lmv1->lmv_magic) != LMV_MAGIC_V1)
1616 if (rc != sizeof(*lmv1))
1617 RETURN(rc = rc > 0 ? -EINVAL : rc);
1619 rc1 = lod_load_lmv_shards(env, lod_dt_obj(dt),
1623 RETURN(rc = rc1 != 0 ? rc1 : rc);
1626 if ((rc > 0) && buf->lb_buf && strcmp(name, XATTR_NAME_LOV) == 0) {
1627 struct lov_comp_md_v1 *lcm = buf->lb_buf;
1629 if (lcm->lcm_magic == cpu_to_le32(LOV_MAGIC_SEL))
1630 lcm->lcm_magic = cpu_to_le32(LOV_MAGIC_COMP_V1);
1633 if (rc != -ENODATA || !S_ISDIR(dt->do_lu.lo_header->loh_attr & S_IFMT))
1637 * XXX: Only used by lfsck
1639 * lod returns default striping on the real root of the device
1640 * this is like the root stores default striping for the whole
1641 * filesystem. historically we've been using a different approach
1642 * and store it in the config.
1644 dt_root_get(env, dev->lod_child, &info->lti_fid);
1645 is_root = lu_fid_eq(&info->lti_fid, lu_object_fid(&dt->do_lu));
1647 if (is_root && strcmp(XATTR_NAME_LOV, name) == 0) {
1648 struct lov_user_md *lum = buf->lb_buf;
1649 struct lov_desc *desc = &dev->lod_ost_descs.ltd_lov_desc;
1651 if (buf->lb_buf == NULL) {
1653 } else if (buf->lb_len >= sizeof(*lum)) {
1654 lum->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V1);
1655 lmm_oi_set_seq(&lum->lmm_oi, FID_SEQ_LOV_DEFAULT);
1656 lmm_oi_set_id(&lum->lmm_oi, 0);
1657 lmm_oi_cpu_to_le(&lum->lmm_oi, &lum->lmm_oi);
1658 lum->lmm_pattern = cpu_to_le32(desc->ld_pattern);
1659 lum->lmm_stripe_size = cpu_to_le32(
1660 desc->ld_default_stripe_size);
1661 lum->lmm_stripe_count = cpu_to_le16(
1662 desc->ld_default_stripe_count);
1663 lum->lmm_stripe_offset = cpu_to_le16(
1664 desc->ld_default_stripe_offset);
1677 * Checks that the magic of the stripe is sane.
1679 * \param[in] lod lod device
1680 * \param[in] lum a buffer storing LMV EA to verify
1682 * \retval 0 if the EA is sane
1683 * \retval negative otherwise
1685 static int lod_verify_md_striping(struct lod_device *lod,
1686 const struct lmv_user_md_v1 *lum)
1688 if (unlikely(le32_to_cpu(lum->lum_magic) != LMV_USER_MAGIC)) {
1689 CERROR("%s: invalid lmv_user_md: magic = %x, "
1690 "stripe_offset = %d, stripe_count = %u: rc = %d\n",
1691 lod2obd(lod)->obd_name, le32_to_cpu(lum->lum_magic),
1692 (int)le32_to_cpu(lum->lum_stripe_offset),
1693 le32_to_cpu(lum->lum_stripe_count), -EINVAL);
1701 * Initialize LMV EA for a slave.
1703 * Initialize slave's LMV EA from the master's LMV EA.
1705 * \param[in] master_lmv a buffer containing master's EA
1706 * \param[out] slave_lmv a buffer where slave's EA will be stored
1709 static void lod_prep_slave_lmv_md(struct lmv_mds_md_v1 *slave_lmv,
1710 const struct lmv_mds_md_v1 *master_lmv)
1712 *slave_lmv = *master_lmv;
1713 slave_lmv->lmv_magic = cpu_to_le32(LMV_MAGIC_STRIPE);
1719 * Generate LMV EA from the object passed as \a dt. The object must have
1720 * the stripes created and initialized.
1722 * \param[in] env execution environment
1723 * \param[in] dt object
1724 * \param[out] lmv_buf buffer storing generated LMV EA
1726 * \retval 0 on success
1727 * \retval negative if failed
1729 static int lod_prep_lmv_md(const struct lu_env *env, struct dt_object *dt,
1730 struct lu_buf *lmv_buf)
1732 struct lod_thread_info *info = lod_env_info(env);
1733 struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev);
1734 struct lod_object *lo = lod_dt_obj(dt);
1735 struct lmv_mds_md_v1 *lmm1;
1737 int type = LU_SEQ_RANGE_ANY;
1742 LASSERT(lo->ldo_dir_striped != 0);
1743 LASSERT(lo->ldo_dir_stripe_count > 0);
1744 stripe_count = lo->ldo_dir_stripe_count;
1745 /* Only store the LMV EA heahder on the disk. */
1746 if (info->lti_ea_store_size < sizeof(*lmm1)) {
1747 rc = lod_ea_store_resize(info, sizeof(*lmm1));
1751 memset(info->lti_ea_store, 0, sizeof(*lmm1));
1754 lmm1 = (struct lmv_mds_md_v1 *)info->lti_ea_store;
1755 memset(lmm1, 0, sizeof(*lmm1));
1756 lmm1->lmv_magic = cpu_to_le32(LMV_MAGIC);
1757 lmm1->lmv_stripe_count = cpu_to_le32(stripe_count);
1758 lmm1->lmv_hash_type = cpu_to_le32(lo->ldo_dir_hash_type);
1759 lmm1->lmv_layout_version = cpu_to_le32(lo->ldo_dir_layout_version);
1760 if (lod_is_layout_changing(lo)) {
1761 lmm1->lmv_migrate_hash = cpu_to_le32(lo->ldo_dir_migrate_hash);
1762 lmm1->lmv_migrate_offset =
1763 cpu_to_le32(lo->ldo_dir_migrate_offset);
1765 rc = lod_fld_lookup(env, lod, lu_object_fid(&dt->do_lu),
1770 lmm1->lmv_master_mdt_index = cpu_to_le32(mdtidx);
1771 lmv_buf->lb_buf = info->lti_ea_store;
1772 lmv_buf->lb_len = sizeof(*lmm1);
1778 * Create in-core represenation for a striped directory.
1780 * Parse the buffer containing LMV EA and instantiate LU objects
1781 * representing the stripe objects. The pointers to the objects are
1782 * stored in ldo_stripe field of \a lo. This function is used when
1783 * we need to access an already created object (i.e. load from a disk).
1785 * \param[in] env execution environment
1786 * \param[in] lo lod object
1787 * \param[in] buf buffer containing LMV EA
1789 * \retval 0 on success
1790 * \retval negative if failed
1792 int lod_parse_dir_striping(const struct lu_env *env, struct lod_object *lo,
1793 const struct lu_buf *buf)
1795 struct lod_thread_info *info = lod_env_info(env);
1796 struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
1797 struct lod_tgt_descs *ltd = &lod->lod_mdt_descs;
1798 struct dt_object **stripe;
1799 union lmv_mds_md *lmm = buf->lb_buf;
1800 struct lmv_mds_md_v1 *lmv1 = &lmm->lmv_md_v1;
1801 struct lu_fid *fid = &info->lti_fid;
1806 LASSERT(mutex_is_locked(&lo->ldo_layout_mutex));
1808 /* XXX may be useless as not called for foreign LMV ?? */
1809 if (le32_to_cpu(lmv1->lmv_magic) == LMV_MAGIC_FOREIGN)
1812 if (le32_to_cpu(lmv1->lmv_magic) == LMV_MAGIC_STRIPE) {
1813 lo->ldo_dir_slave_stripe = 1;
1817 if (!lmv_is_sane(lmv1))
1820 LASSERT(lo->ldo_stripe == NULL);
1821 OBD_ALLOC(stripe, sizeof(stripe[0]) *
1822 (le32_to_cpu(lmv1->lmv_stripe_count)));
1826 for (i = 0; i < le32_to_cpu(lmv1->lmv_stripe_count); i++) {
1827 struct dt_device *tgt_dt;
1828 struct dt_object *dto;
1829 int type = LU_SEQ_RANGE_ANY;
1832 fid_le_to_cpu(fid, &lmv1->lmv_stripe_fids[i]);
1833 if (!fid_is_sane(fid)) {
1838 rc = lod_fld_lookup(env, lod, fid, &idx, &type);
1842 if (idx == lod2lu_dev(lod)->ld_site->ld_seq_site->ss_node_id) {
1843 tgt_dt = lod->lod_child;
1845 struct lod_tgt_desc *tgt;
1847 tgt = LTD_TGT(ltd, idx);
1849 GOTO(out, rc = -ESTALE);
1850 tgt_dt = tgt->ltd_tgt;
1853 dto = dt_locate_at(env, tgt_dt, fid,
1854 lo->ldo_obj.do_lu.lo_dev->ld_site->ls_top_dev,
1857 GOTO(out, rc = PTR_ERR(dto));
1862 lo->ldo_stripe = stripe;
1863 lo->ldo_dir_stripe_count = le32_to_cpu(lmv1->lmv_stripe_count);
1864 lo->ldo_dir_stripes_allocated = le32_to_cpu(lmv1->lmv_stripe_count);
1865 lo->ldo_dir_layout_version = le32_to_cpu(lmv1->lmv_layout_version);
1866 lo->ldo_dir_migrate_offset = le32_to_cpu(lmv1->lmv_migrate_offset);
1867 lo->ldo_dir_migrate_hash = le32_to_cpu(lmv1->lmv_migrate_hash);
1868 lo->ldo_dir_hash_type = le32_to_cpu(lmv1->lmv_hash_type);
1870 lod_striping_free_nolock(env, lo);
1876 * Declare create a striped directory.
1878 * Declare creating a striped directory with a given stripe pattern on the
1879 * specified MDTs. A striped directory is represented as a regular directory
1880 * - an index listing all the stripes. The stripes point back to the master
1881 * object with ".." and LinkEA. The master object gets LMV EA which
1882 * identifies it as a striped directory. The function allocates FIDs
1885 * \param[in] env execution environment
1886 * \param[in] dt object
1887 * \param[in] attr attributes to initialize the objects with
1888 * \param[in] dof type of objects to be created
1889 * \param[in] th transaction handle
1891 * \retval 0 on success
1892 * \retval negative if failed
1894 static int lod_dir_declare_create_stripes(const struct lu_env *env,
1895 struct dt_object *dt,
1896 struct lu_attr *attr,
1897 struct dt_object_format *dof,
1900 struct lod_thread_info *info = lod_env_info(env);
1901 struct lu_buf lmv_buf;
1902 struct lu_buf slave_lmv_buf;
1903 struct lmv_mds_md_v1 *lmm;
1904 struct lmv_mds_md_v1 *slave_lmm = NULL;
1905 struct dt_insert_rec *rec = &info->lti_dt_rec;
1906 struct lod_object *lo = lod_dt_obj(dt);
1911 rc = lod_prep_lmv_md(env, dt, &lmv_buf);
1914 lmm = lmv_buf.lb_buf;
1916 OBD_ALLOC_PTR(slave_lmm);
1917 if (slave_lmm == NULL)
1918 GOTO(out, rc = -ENOMEM);
1920 lod_prep_slave_lmv_md(slave_lmm, lmm);
1921 slave_lmv_buf.lb_buf = slave_lmm;
1922 slave_lmv_buf.lb_len = sizeof(*slave_lmm);
1924 if (!dt_try_as_dir(env, dt_object_child(dt)))
1925 GOTO(out, rc = -EINVAL);
1927 rec->rec_type = S_IFDIR;
1928 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
1929 struct dt_object *dto = lo->ldo_stripe[i];
1930 char *stripe_name = info->lti_key;
1931 struct lu_name *sname;
1932 struct linkea_data ldata = { NULL };
1933 struct lu_buf linkea_buf;
1935 /* OBD_FAIL_MDS_STRIPE_FID may leave stripe uninitialized */
1939 /* directory split skip create for existing stripes */
1940 if (!(lod_is_splitting(lo) && i < lo->ldo_dir_split_offset)) {
1941 rc = lod_sub_declare_create(env, dto, attr, NULL, dof,
1946 if (!dt_try_as_dir(env, dto))
1947 GOTO(out, rc = -EINVAL);
1949 rc = lod_sub_declare_ref_add(env, dto, th);
1953 rec->rec_fid = lu_object_fid(&dto->do_lu);
1954 rc = lod_sub_declare_insert(env, dto,
1955 (const struct dt_rec *)rec,
1956 (const struct dt_key *)dot,
1961 /* master stripe FID will be put to .. */
1962 rec->rec_fid = lu_object_fid(&dt->do_lu);
1963 rc = lod_sub_declare_insert(env, dto,
1964 (const struct dt_rec *)rec,
1965 (const struct dt_key *)dotdot,
1970 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_NAME) &&
1972 snprintf(stripe_name, sizeof(info->lti_key),
1974 PFID(lu_object_fid(&dto->do_lu)),
1977 snprintf(stripe_name, sizeof(info->lti_key),
1979 PFID(lu_object_fid(&dto->do_lu)), i);
1981 sname = lod_name_get(env, stripe_name,
1982 strlen(stripe_name));
1983 rc = linkea_links_new(&ldata, &info->lti_linkea_buf,
1984 sname, lu_object_fid(&dt->do_lu));
1988 linkea_buf.lb_buf = ldata.ld_buf->lb_buf;
1989 linkea_buf.lb_len = ldata.ld_leh->leh_len;
1990 rc = lod_sub_declare_xattr_set(env, dto, &linkea_buf,
1991 XATTR_NAME_LINK, 0, th);
1995 rec->rec_fid = lu_object_fid(&dto->do_lu);
1996 rc = lod_sub_declare_insert(env, dt_object_child(dt),
1997 (const struct dt_rec *)rec,
1998 (const struct dt_key *)stripe_name, th);
2002 rc = lod_sub_declare_ref_add(env, dt_object_child(dt),
2008 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_SLAVE_LMV) ||
2009 cfs_fail_val != i) {
2010 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_LMV) &&
2012 slave_lmm->lmv_master_mdt_index =
2015 slave_lmm->lmv_master_mdt_index =
2017 rc = lod_sub_declare_xattr_set(env, dto, &slave_lmv_buf,
2018 XATTR_NAME_LMV, 0, th);
2024 rc = lod_sub_declare_xattr_set(env, dt_object_child(dt),
2025 &lmv_buf, XATTR_NAME_LMV, 0, th);
2029 if (slave_lmm != NULL)
2030 OBD_FREE_PTR(slave_lmm);
2036 * Allocate a striping on a predefined set of MDTs.
2038 * Allocates new striping using the MDT index range provided by the data from
2039 * the lum_obejcts contained in the lmv_user_md passed to this method if
2040 * \a is_specific is true; or allocates new layout starting from MDT index in
2041 * lo->ldo_dir_stripe_offset. The exact order of MDTs is not important and
2042 * varies depending on MDT status. The number of stripes needed and stripe
2043 * offset are taken from the object. If that number cannot be met, then the
2044 * function returns an error and then it's the caller's responsibility to
2045 * release the stripes allocated. All the internal structures are protected,
2046 * but no concurrent allocation is allowed on the same objects.
2048 * \param[in] env execution environment for this thread
2049 * \param[in] lo LOD object
2050 * \param[out] stripes striping created
2051 * \param[out] mdt_indices MDT indices of striping created
2052 * \param[in] is_specific true if the MDTs are provided by lum; false if
2053 * only the starting MDT index is provided
2055 * \retval positive stripes allocated, including the first stripe allocated
2057 * \retval negative errno on failure
2059 static int lod_mdt_alloc_specific(const struct lu_env *env,
2060 struct lod_object *lo,
2061 struct dt_object **stripes,
2062 __u32 *mdt_indices, bool is_specific)
2064 struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
2065 struct lu_tgt_descs *ltd = &lod->lod_mdt_descs;
2066 struct lu_tgt_desc *tgt = NULL;
2067 struct lu_object_conf conf = { .loc_flags = LOC_F_NEW };
2068 struct dt_device *tgt_dt = NULL;
2069 struct lu_fid fid = { 0 };
2070 struct dt_object *dto;
2072 u32 stripe_count = lo->ldo_dir_stripe_count;
2078 master_index = lu_site2seq(lod2lu_dev(lod)->ld_site)->ss_node_id;
2079 if (stripe_count > 1)
2080 /* Set the start index for the 2nd stripe allocation */
2081 mdt_indices[1] = (mdt_indices[0] + 1) %
2082 (lod->lod_remote_mdt_count + 1);
2084 for (; stripe_idx < stripe_count; stripe_idx++) {
2085 /* Try to find next avaible target */
2086 idx = mdt_indices[stripe_idx];
2087 for (j = 0; j < lod->lod_remote_mdt_count;
2088 j++, idx = (idx + 1) % (lod->lod_remote_mdt_count + 1)) {
2089 bool already_allocated = false;
2092 CDEBUG(D_INFO, "try idx %d, mdt cnt %u, allocated %u\n",
2093 idx, lod->lod_remote_mdt_count + 1, stripe_idx);
2095 if (likely(!is_specific &&
2096 !OBD_FAIL_CHECK(OBD_FAIL_LARGE_STRIPE))) {
2097 /* check whether the idx already exists
2098 * in current allocated array */
2099 for (k = 0; k < stripe_idx; k++) {
2100 if (mdt_indices[k] == idx) {
2101 already_allocated = true;
2106 if (already_allocated)
2110 /* Sigh, this index is not in the bitmap, let's check
2111 * next available target */
2112 if (!cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx) &&
2113 idx != master_index)
2116 if (idx == master_index) {
2117 /* Allocate the FID locally */
2118 tgt_dt = lod->lod_child;
2119 rc = dt_fid_alloc(env, tgt_dt, &fid, NULL,
2126 /* check the status of the OSP */
2127 tgt = LTD_TGT(ltd, idx);
2131 tgt_dt = tgt->ltd_tgt;
2132 if (!tgt->ltd_active)
2133 /* this OSP doesn't feel well */
2136 rc = dt_fid_alloc(env, tgt_dt, &fid, NULL, NULL);
2143 /* Can not allocate more stripes */
2144 if (j == lod->lod_remote_mdt_count) {
2145 CDEBUG(D_INFO, "%s: require stripes %u only get %d\n",
2146 lod2obd(lod)->obd_name, stripe_count,
2151 CDEBUG(D_INFO, "Get idx %d, for stripe %d "DFID"\n",
2152 idx, stripe_idx, PFID(&fid));
2153 mdt_indices[stripe_idx] = idx;
2154 /* Set the start index for next stripe allocation */
2155 if (!is_specific && stripe_idx < stripe_count - 1) {
2157 * for large dir test, put all other slaves on one
2158 * remote MDT, otherwise we may save too many local
2159 * slave locks which will exceed RS_MAX_LOCKS.
2161 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_LARGE_STRIPE)))
2163 mdt_indices[stripe_idx + 1] = (idx + 1) %
2164 (lod->lod_remote_mdt_count + 1);
2166 /* tgt_dt and fid must be ready after search avaible OSP
2167 * in the above loop */
2168 LASSERT(tgt_dt != NULL);
2169 LASSERT(fid_is_sane(&fid));
2171 /* fail a remote stripe FID allocation */
2172 if (stripe_idx && OBD_FAIL_CHECK(OBD_FAIL_MDS_STRIPE_FID))
2175 dto = dt_locate_at(env, tgt_dt, &fid,
2176 lo->ldo_obj.do_lu.lo_dev->ld_site->ls_top_dev,
2183 stripes[stripe_idx] = dto;
2189 for (j = 1; j < stripe_idx; j++) {
2190 LASSERT(stripes[j] != NULL);
2191 dt_object_put(env, stripes[j]);
2197 static int lod_prep_md_striped_create(const struct lu_env *env,
2198 struct dt_object *dt,
2199 struct lu_attr *attr,
2200 const struct lmv_user_md_v1 *lum,
2201 struct dt_object_format *dof,
2204 struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev);
2205 struct lod_object *lo = lod_dt_obj(dt);
2206 struct dt_object **stripes;
2207 struct lu_object_conf conf = { .loc_flags = LOC_F_NEW };
2208 struct lu_fid fid = { 0 };
2215 /* The lum has been verifed in lod_verify_md_striping */
2216 LASSERT(le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC ||
2217 le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC_SPECIFIC);
2219 stripe_count = lo->ldo_dir_stripe_count;
2221 OBD_ALLOC(stripes, sizeof(stripes[0]) * stripe_count);
2225 /* Allocate the first stripe locally */
2226 rc = dt_fid_alloc(env, lod->lod_child, &fid, NULL, NULL);
2230 stripes[0] = dt_locate_at(env, lod->lod_child, &fid,
2231 dt->do_lu.lo_dev->ld_site->ls_top_dev, &conf);
2232 if (IS_ERR(stripes[0]))
2233 GOTO(out, rc = PTR_ERR(stripes[0]));
2235 if (lo->ldo_dir_stripe_offset == LMV_OFFSET_DEFAULT) {
2236 lod_qos_statfs_update(env, lod, &lod->lod_mdt_descs);
2237 rc = lod_mdt_alloc_qos(env, lo, stripes, 1, stripe_count);
2239 rc = lod_mdt_alloc_rr(env, lo, stripes, 1,
2243 bool is_specific = false;
2245 OBD_ALLOC(idx_array, sizeof(idx_array[0]) * stripe_count);
2247 GOTO(out, rc = -ENOMEM);
2249 if (le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC_SPECIFIC) {
2251 for (i = 0; i < stripe_count; i++)
2253 le32_to_cpu(lum->lum_objects[i].lum_mds);
2256 /* stripe 0 is local */
2258 lu_site2seq(lod2lu_dev(lod)->ld_site)->ss_node_id;
2259 rc = lod_mdt_alloc_specific(env, lo, stripes, idx_array,
2261 OBD_FREE(idx_array, sizeof(idx_array[0]) * stripe_count);
2269 lo->ldo_dir_striped = 1;
2270 lo->ldo_stripe = stripes;
2271 lo->ldo_dir_stripe_count = rc;
2272 lo->ldo_dir_stripes_allocated = stripe_count;
2274 lo->ldo_dir_stripe_loaded = 1;
2276 rc = lod_dir_declare_create_stripes(env, dt, attr, dof, th);
2278 lod_striping_free(env, lo);
2284 if (!IS_ERR_OR_NULL(stripes[0]))
2285 dt_object_put(env, stripes[0]);
2286 for (i = 1; i < stripe_count; i++)
2287 LASSERT(!stripes[i]);
2288 OBD_FREE(stripes, sizeof(stripes[0]) * stripe_count);
2295 * Alloc cached foreign LMV
2297 * \param[in] lo object
2298 * \param[in] size size of foreign LMV
2300 * \retval 0 on success
2301 * \retval negative if failed
2303 int lod_alloc_foreign_lmv(struct lod_object *lo, size_t size)
2305 OBD_ALLOC_LARGE(lo->ldo_foreign_lmv, size);
2306 if (lo->ldo_foreign_lmv == NULL)
2308 lo->ldo_foreign_lmv_size = size;
2309 lo->ldo_dir_is_foreign = 1;
2315 * Declare create striped md object.
2317 * The function declares intention to create a striped directory. This is a
2318 * wrapper for lod_prep_md_striped_create(). The only additional functionality
2319 * is to verify pattern \a lum_buf is good. Check that function for the details.
2321 * \param[in] env execution environment
2322 * \param[in] dt object
2323 * \param[in] attr attributes to initialize the objects with
2324 * \param[in] lum_buf a pattern specifying the number of stripes and
2326 * \param[in] dof type of objects to be created
2327 * \param[in] th transaction handle
2329 * \retval 0 on success
2330 * \retval negative if failed
2333 static int lod_declare_xattr_set_lmv(const struct lu_env *env,
2334 struct dt_object *dt,
2335 struct lu_attr *attr,
2336 const struct lu_buf *lum_buf,
2337 struct dt_object_format *dof,
2340 struct lod_object *lo = lod_dt_obj(dt);
2341 struct lmv_user_md_v1 *lum = lum_buf->lb_buf;
2345 LASSERT(lum != NULL);
2347 CDEBUG(D_INFO, "lum magic = %x count = %u offset = %d\n",
2348 le32_to_cpu(lum->lum_magic), le32_to_cpu(lum->lum_stripe_count),
2349 (int)le32_to_cpu(lum->lum_stripe_offset));
2351 if (lo->ldo_dir_stripe_count == 0) {
2352 if (lo->ldo_dir_is_foreign) {
2353 rc = lod_alloc_foreign_lmv(lo, lum_buf->lb_len);
2356 memcpy(lo->ldo_foreign_lmv, lum, lum_buf->lb_len);
2357 lo->ldo_dir_stripe_loaded = 1;
2362 /* prepare dir striped objects */
2363 rc = lod_prep_md_striped_create(env, dt, attr, lum, dof, th);
2365 /* failed to create striping, let's reset
2366 * config so that others don't get confused */
2367 lod_striping_free(env, lo);
2375 * Set or replace striped directory layout, and LFSCK may set layout on a plain
2376 * directory, so don't check stripe count.
2378 * \param[in] env execution environment
2379 * \param[in] dt target object
2380 * \param[in] buf LMV buf which contains source stripe fids
2381 * \param[in] fl set or replace
2382 * \param[in] th transaction handle
2384 * \retval 0 on success
2385 * \retval negative if failed
2387 static int lod_dir_layout_set(const struct lu_env *env,
2388 struct dt_object *dt,
2389 const struct lu_buf *buf,
2393 struct dt_object *next = dt_object_child(dt);
2394 struct lod_object *lo = lod_dt_obj(dt);
2395 struct lod_device *lod = lu2lod_dev(lod2lu_obj(lo)->lo_dev);
2396 struct lmv_mds_md_v1 *lmv = buf->lb_buf;
2397 struct lmv_mds_md_v1 *slave_lmv;
2398 struct lu_buf slave_buf;
2404 if (!lmv_is_sane2(lmv))
2407 /* adjust hash for dir merge, which may not be set in user command */
2408 if (lmv_is_merging(lmv) && !lmv->lmv_migrate_hash)
2409 lmv->lmv_merge_hash =
2410 lod->lod_mdt_descs.ltd_lmv_desc.ld_pattern;
2412 LMV_DEBUG(D_INFO, lmv, "set");
2414 rc = lod_sub_xattr_set(env, next, buf, XATTR_NAME_LMV, fl, th);
2418 /* directory restripe may update stripe LMV directly */
2419 if (!lo->ldo_dir_stripe_count)
2422 lo->ldo_dir_hash_type = le32_to_cpu(lmv->lmv_hash_type);
2423 lo->ldo_dir_migrate_offset = le32_to_cpu(lmv->lmv_migrate_offset);
2424 lo->ldo_dir_migrate_hash = le32_to_cpu(lmv->lmv_migrate_hash);
2425 lo->ldo_dir_layout_version = le32_to_cpu(lmv->lmv_layout_version);
2427 OBD_ALLOC_PTR(slave_lmv);
2431 lod_prep_slave_lmv_md(slave_lmv, lmv);
2432 slave_buf.lb_buf = slave_lmv;
2433 slave_buf.lb_len = sizeof(*slave_lmv);
2435 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
2436 if (!lo->ldo_stripe[i])
2439 if (!dt_object_exists(lo->ldo_stripe[i]))
2442 rc = lod_sub_xattr_set(env, lo->ldo_stripe[i], &slave_buf,
2443 XATTR_NAME_LMV, fl, th);
2448 OBD_FREE_PTR(slave_lmv);
2454 * Implementation of dt_object_operations::do_declare_xattr_set.
2456 * Used with regular (non-striped) objects. Basically it
2457 * initializes the striping information and applies the
2458 * change to all the stripes.
2460 * \see dt_object_operations::do_declare_xattr_set() in the API description
2463 static int lod_dir_declare_xattr_set(const struct lu_env *env,
2464 struct dt_object *dt,
2465 const struct lu_buf *buf,
2466 const char *name, int fl,
2469 struct dt_object *next = dt_object_child(dt);
2470 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
2471 struct lod_object *lo = lod_dt_obj(dt);
2476 if (strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0) {
2477 struct lmv_user_md_v1 *lum;
2479 LASSERT(buf != NULL && buf->lb_buf != NULL);
2481 rc = lod_verify_md_striping(d, lum);
2484 } else if (strcmp(name, XATTR_NAME_LOV) == 0) {
2485 rc = lod_verify_striping(env, d, lo, buf, false);
2490 rc = lod_sub_declare_xattr_set(env, next, buf, name, fl, th);
2494 /* Note: Do not set LinkEA on sub-stripes, otherwise
2495 * it will confuse the fid2path process(see mdt_path_current()).
2496 * The linkEA between master and sub-stripes is set in
2497 * lod_xattr_set_lmv(). */
2498 if (strcmp(name, XATTR_NAME_LINK) == 0)
2501 /* set xattr to each stripes, if needed */
2502 rc = lod_striping_load(env, lo);
2506 if (lo->ldo_dir_stripe_count == 0)
2509 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
2510 if (!lo->ldo_stripe[i])
2513 if (!dt_object_exists(lo->ldo_stripe[i]))
2516 rc = lod_sub_declare_xattr_set(env, lo->ldo_stripe[i],
2526 lod_obj_stripe_replace_parent_fid_cb(const struct lu_env *env,
2527 struct lod_object *lo,
2528 struct dt_object *dt, struct thandle *th,
2529 int comp_idx, int stripe_idx,
2530 struct lod_obj_stripe_cb_data *data)
2532 struct lod_thread_info *info = lod_env_info(env);
2533 struct lod_layout_component *comp = &lo->ldo_comp_entries[comp_idx];
2534 struct filter_fid *ff = &info->lti_ff;
2535 struct lu_buf *buf = &info->lti_buf;
2539 buf->lb_len = sizeof(*ff);
2540 rc = dt_xattr_get(env, dt, buf, XATTR_NAME_FID);
2548 * locd_buf is set if it's called by dir migration, which doesn't check
2551 if (data->locd_buf) {
2552 memset(ff, 0, sizeof(*ff));
2553 ff->ff_parent = *(struct lu_fid *)data->locd_buf->lb_buf;
2555 filter_fid_le_to_cpu(ff, ff, sizeof(*ff));
2557 if (lu_fid_eq(lod_object_fid(lo), &ff->ff_parent) &&
2558 ff->ff_layout.ol_comp_id == comp->llc_id)
2561 memset(ff, 0, sizeof(*ff));
2562 ff->ff_parent = *lu_object_fid(&lo->ldo_obj.do_lu);
2565 /* rewrite filter_fid */
2566 ff->ff_parent.f_ver = stripe_idx;
2567 ff->ff_layout.ol_stripe_size = comp->llc_stripe_size;
2568 ff->ff_layout.ol_stripe_count = comp->llc_stripe_count;
2569 ff->ff_layout.ol_comp_id = comp->llc_id;
2570 ff->ff_layout.ol_comp_start = comp->llc_extent.e_start;
2571 ff->ff_layout.ol_comp_end = comp->llc_extent.e_end;
2572 filter_fid_cpu_to_le(ff, ff, sizeof(*ff));
2574 if (data->locd_declare)
2575 rc = lod_sub_declare_xattr_set(env, dt, buf, XATTR_NAME_FID,
2576 LU_XATTR_REPLACE, th);
2578 rc = lod_sub_xattr_set(env, dt, buf, XATTR_NAME_FID,
2579 LU_XATTR_REPLACE, th);
2585 * Reset parent FID on OST object
2587 * Replace parent FID with @dt object FID, which is only called during migration
2588 * to reset the parent FID after the MDT object is migrated to the new MDT, i.e.
2589 * the FID is changed.
2591 * \param[in] env execution environment
2592 * \param[in] dt dt_object whose stripes's parent FID will be reset
2593 * \parem[in] th thandle
2594 * \param[in] declare if it is declare
2596 * \retval 0 if reset succeeds
2597 * \retval negative errno if reset fails
2599 static int lod_replace_parent_fid(const struct lu_env *env,
2600 struct dt_object *dt,
2601 const struct lu_buf *buf,
2602 struct thandle *th, bool declare)
2604 struct lod_object *lo = lod_dt_obj(dt);
2605 struct lod_thread_info *info = lod_env_info(env);
2606 struct filter_fid *ff;
2607 struct lod_obj_stripe_cb_data data = { { 0 } };
2611 LASSERT(S_ISREG(dt->do_lu.lo_header->loh_attr));
2613 /* set xattr to each stripes, if needed */
2614 rc = lod_striping_load(env, lo);
2618 if (!lod_obj_is_striped(dt))
2621 if (info->lti_ea_store_size < sizeof(*ff)) {
2622 rc = lod_ea_store_resize(info, sizeof(*ff));
2627 data.locd_declare = declare;
2628 data.locd_stripe_cb = lod_obj_stripe_replace_parent_fid_cb;
2629 data.locd_buf = buf;
2630 rc = lod_obj_for_each_stripe(env, lo, th, &data);
2635 inline __u16 lod_comp_entry_stripe_count(struct lod_object *lo,
2636 struct lod_layout_component *entry,
2639 struct lod_device *lod = lu2lod_dev(lod2lu_obj(lo)->lo_dev);
2643 else if (lod_comp_inited(entry))
2644 return entry->llc_stripe_count;
2645 else if ((__u16)-1 == entry->llc_stripe_count)
2646 return lod->lod_ost_count;
2648 return lod_get_stripe_count(lod, lo,
2649 entry->llc_stripe_count, false);
2652 static int lod_comp_md_size(struct lod_object *lo, bool is_dir)
2654 int magic, size = 0, i;
2655 struct lod_layout_component *comp_entries;
2657 bool is_composite, is_foreign = false;
2660 comp_cnt = lo->ldo_def_striping->lds_def_comp_cnt;
2661 comp_entries = lo->ldo_def_striping->lds_def_comp_entries;
2663 lo->ldo_def_striping->lds_def_striping_is_composite;
2665 comp_cnt = lo->ldo_comp_cnt;
2666 comp_entries = lo->ldo_comp_entries;
2667 is_composite = lo->ldo_is_composite;
2668 is_foreign = lo->ldo_is_foreign;
2672 return lo->ldo_foreign_lov_size;
2674 LASSERT(comp_cnt != 0 && comp_entries != NULL);
2676 size = sizeof(struct lov_comp_md_v1) +
2677 sizeof(struct lov_comp_md_entry_v1) * comp_cnt;
2678 LASSERT(size % sizeof(__u64) == 0);
2681 for (i = 0; i < comp_cnt; i++) {
2684 magic = comp_entries[i].llc_pool ? LOV_MAGIC_V3 : LOV_MAGIC_V1;
2685 stripe_count = lod_comp_entry_stripe_count(lo, &comp_entries[i],
2687 if (!is_dir && is_composite)
2688 lod_comp_shrink_stripe_count(&comp_entries[i],
2691 size += lov_user_md_size(stripe_count, magic);
2692 LASSERT(size % sizeof(__u64) == 0);
2698 * Declare component add. The xattr name is XATTR_LUSTRE_LOV.add, and
2699 * the xattr value is binary lov_comp_md_v1 which contains component(s)
2702 * \param[in] env execution environment
2703 * \param[in] dt dt_object to add components on
2704 * \param[in] buf buffer contains components to be added
2705 * \parem[in] th thandle
2707 * \retval 0 on success
2708 * \retval negative errno on failure
2710 static int lod_declare_layout_add(const struct lu_env *env,
2711 struct dt_object *dt,
2712 const struct lu_buf *buf,
2715 struct lod_thread_info *info = lod_env_info(env);
2716 struct lod_layout_component *comp_array, *lod_comp, *old_array;
2717 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
2718 struct dt_object *next = dt_object_child(dt);
2719 struct lov_desc *desc = &d->lod_ost_descs.ltd_lov_desc;
2720 struct lod_object *lo = lod_dt_obj(dt);
2721 struct lov_user_md_v3 *v3;
2722 struct lov_comp_md_v1 *comp_v1 = buf->lb_buf;
2724 int i, rc, array_cnt, old_array_cnt;
2727 LASSERT(lo->ldo_is_composite);
2729 if (lo->ldo_flr_state != LCM_FL_NONE)
2732 rc = lod_verify_striping(env, d, lo, buf, false);
2736 magic = comp_v1->lcm_magic;
2737 if (magic == __swab32(LOV_USER_MAGIC_COMP_V1)) {
2738 lustre_swab_lov_comp_md_v1(comp_v1);
2739 magic = comp_v1->lcm_magic;
2742 if (magic != LOV_USER_MAGIC_COMP_V1)
2745 array_cnt = lo->ldo_comp_cnt + comp_v1->lcm_entry_count;
2746 OBD_ALLOC(comp_array, sizeof(*comp_array) * array_cnt);
2747 if (comp_array == NULL)
2750 memcpy(comp_array, lo->ldo_comp_entries,
2751 sizeof(*comp_array) * lo->ldo_comp_cnt);
2753 for (i = 0; i < comp_v1->lcm_entry_count; i++) {
2754 struct lov_user_md_v1 *v1;
2755 struct lu_extent *ext;
2757 v1 = (struct lov_user_md *)((char *)comp_v1 +
2758 comp_v1->lcm_entries[i].lcme_offset);
2759 ext = &comp_v1->lcm_entries[i].lcme_extent;
2761 lod_comp = &comp_array[lo->ldo_comp_cnt + i];
2762 lod_comp->llc_extent.e_start = ext->e_start;
2763 lod_comp->llc_extent.e_end = ext->e_end;
2764 lod_comp->llc_stripe_offset = v1->lmm_stripe_offset;
2765 lod_comp->llc_flags = comp_v1->lcm_entries[i].lcme_flags;
2767 lod_comp->llc_stripe_count = v1->lmm_stripe_count;
2768 lod_comp->llc_stripe_size = v1->lmm_stripe_size;
2769 lod_adjust_stripe_info(lod_comp, desc, 0);
2771 if (v1->lmm_magic == LOV_USER_MAGIC_V3) {
2772 v3 = (struct lov_user_md_v3 *) v1;
2773 if (v3->lmm_pool_name[0] != '\0') {
2774 rc = lod_set_pool(&lod_comp->llc_pool,
2782 old_array = lo->ldo_comp_entries;
2783 old_array_cnt = lo->ldo_comp_cnt;
2785 lo->ldo_comp_entries = comp_array;
2786 lo->ldo_comp_cnt = array_cnt;
2788 /* No need to increase layout generation here, it will be increased
2789 * later when generating component ID for the new components */
2791 info->lti_buf.lb_len = lod_comp_md_size(lo, false);
2792 rc = lod_sub_declare_xattr_set(env, next, &info->lti_buf,
2793 XATTR_NAME_LOV, 0, th);
2795 lo->ldo_comp_entries = old_array;
2796 lo->ldo_comp_cnt = old_array_cnt;
2800 OBD_FREE(old_array, sizeof(*lod_comp) * old_array_cnt);
2802 LASSERT(lo->ldo_mirror_count == 1);
2803 lo->ldo_mirrors[0].lme_end = array_cnt - 1;
2808 for (i = lo->ldo_comp_cnt; i < array_cnt; i++) {
2809 lod_comp = &comp_array[i];
2810 if (lod_comp->llc_pool != NULL) {
2811 OBD_FREE(lod_comp->llc_pool,
2812 strlen(lod_comp->llc_pool) + 1);
2813 lod_comp->llc_pool = NULL;
2816 OBD_FREE(comp_array, sizeof(*comp_array) * array_cnt);
2821 * lod_last_non_stale_mirror() - Check if a mirror is the last non-stale mirror.
2822 * @mirror_id: Mirror id to be checked.
2825 * This function checks if a mirror with specified @mirror_id is the last
2826 * non-stale mirror of a LOD object @lo.
2828 * Return: true or false.
2831 bool lod_last_non_stale_mirror(__u16 mirror_id, struct lod_object *lo)
2833 struct lod_layout_component *lod_comp;
2834 bool has_stale_flag;
2837 for (i = 0; i < lo->ldo_mirror_count; i++) {
2838 if (lo->ldo_mirrors[i].lme_id == mirror_id ||
2839 lo->ldo_mirrors[i].lme_stale)
2842 has_stale_flag = false;
2843 lod_foreach_mirror_comp(lod_comp, lo, i) {
2844 if (lod_comp->llc_flags & LCME_FL_STALE) {
2845 has_stale_flag = true;
2849 if (!has_stale_flag)
2857 * Declare component set. The xattr is name XATTR_LUSTRE_LOV.set.$field,
2858 * the '$field' can only be 'flags' now. The xattr value is binary
2859 * lov_comp_md_v1 which contains the component ID(s) and the value of
2860 * the field to be modified.
2861 * Please update allowed_lustre_lov macro if $field groks more values
2864 * \param[in] env execution environment
2865 * \param[in] dt dt_object to be modified
2866 * \param[in] op operation string, like "set.flags"
2867 * \param[in] buf buffer contains components to be set
2868 * \parem[in] th thandle
2870 * \retval 0 on success
2871 * \retval negative errno on failure
2873 static int lod_declare_layout_set(const struct lu_env *env,
2874 struct dt_object *dt,
2875 char *op, const struct lu_buf *buf,
2878 struct lod_layout_component *lod_comp;
2879 struct lod_thread_info *info = lod_env_info(env);
2880 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
2881 struct lod_object *lo = lod_dt_obj(dt);
2882 struct lov_comp_md_v1 *comp_v1 = buf->lb_buf;
2885 bool changed = false;
2888 /* Please update allowed_lustre_lov macro if op
2889 * groks more values in the future
2891 if (strcmp(op, "set.flags") != 0) {
2892 CDEBUG(D_LAYOUT, "%s: operation (%s) not supported.\n",
2893 lod2obd(d)->obd_name, op);
2897 magic = comp_v1->lcm_magic;
2898 if (magic == __swab32(LOV_USER_MAGIC_COMP_V1)) {
2899 lustre_swab_lov_comp_md_v1(comp_v1);
2900 magic = comp_v1->lcm_magic;
2903 if (magic != LOV_USER_MAGIC_COMP_V1)
2906 if (comp_v1->lcm_entry_count == 0) {
2907 CDEBUG(D_LAYOUT, "%s: entry count is zero.\n",
2908 lod2obd(d)->obd_name);
2912 for (i = 0; i < comp_v1->lcm_entry_count; i++) {
2913 __u32 id = comp_v1->lcm_entries[i].lcme_id;
2914 __u32 flags = comp_v1->lcm_entries[i].lcme_flags;
2915 __u32 mirror_flag = flags & LCME_MIRROR_FLAGS;
2916 __u16 mirror_id = mirror_id_of(id);
2917 bool neg = flags & LCME_FL_NEG;
2919 if (flags & LCME_FL_INIT) {
2921 lod_striping_free(env, lo);
2925 flags &= ~(LCME_MIRROR_FLAGS | LCME_FL_NEG);
2926 for (j = 0; j < lo->ldo_comp_cnt; j++) {
2927 lod_comp = &lo->ldo_comp_entries[j];
2929 /* lfs only put one flag in each entry */
2930 if ((flags && id != lod_comp->llc_id) ||
2931 (mirror_flag && mirror_id !=
2932 mirror_id_of(lod_comp->llc_id)))
2937 lod_comp->llc_flags &= ~flags;
2939 lod_comp->llc_flags &= ~mirror_flag;
2942 if ((flags & LCME_FL_STALE) &&
2943 lod_last_non_stale_mirror(mirror_id,
2946 lod_comp->llc_flags |= flags;
2949 lod_comp->llc_flags |= mirror_flag;
2950 if (mirror_flag & LCME_FL_NOSYNC)
2951 lod_comp->llc_timestamp =
2952 ktime_get_real_seconds();
2960 CDEBUG(D_LAYOUT, "%s: requested component(s) not found.\n",
2961 lod2obd(d)->obd_name);
2965 lod_obj_inc_layout_gen(lo);
2967 info->lti_buf.lb_len = lod_comp_md_size(lo, false);
2968 rc = lod_sub_declare_xattr_set(env, dt_object_child(dt), &info->lti_buf,
2969 XATTR_NAME_LOV, LU_XATTR_REPLACE, th);
2974 * Declare component deletion. The xattr name is XATTR_LUSTRE_LOV.del,
2975 * and the xattr value is a unique component ID or a special lcme_id.
2977 * \param[in] env execution environment
2978 * \param[in] dt dt_object to be operated on
2979 * \param[in] buf buffer contains component ID or lcme_id
2980 * \parem[in] th thandle
2982 * \retval 0 on success
2983 * \retval negative errno on failure
2985 static int lod_declare_layout_del(const struct lu_env *env,
2986 struct dt_object *dt,
2987 const struct lu_buf *buf,
2990 struct lod_thread_info *info = lod_env_info(env);
2991 struct dt_object *next = dt_object_child(dt);
2992 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
2993 struct lod_object *lo = lod_dt_obj(dt);
2994 struct lu_attr *attr = &lod_env_info(env)->lti_attr;
2995 struct lov_comp_md_v1 *comp_v1 = buf->lb_buf;
2996 __u32 magic, id, flags, neg_flags = 0;
3000 LASSERT(lo->ldo_is_composite);
3002 if (lo->ldo_flr_state != LCM_FL_NONE)
3005 magic = comp_v1->lcm_magic;
3006 if (magic == __swab32(LOV_USER_MAGIC_COMP_V1)) {
3007 lustre_swab_lov_comp_md_v1(comp_v1);
3008 magic = comp_v1->lcm_magic;
3011 if (magic != LOV_USER_MAGIC_COMP_V1)
3014 id = comp_v1->lcm_entries[0].lcme_id;
3015 flags = comp_v1->lcm_entries[0].lcme_flags;
3017 if (id > LCME_ID_MAX || (flags & ~LCME_KNOWN_FLAGS)) {
3018 CDEBUG(D_LAYOUT, "%s: invalid component id %#x, flags %#x\n",
3019 lod2obd(d)->obd_name, id, flags);
3023 if (id != LCME_ID_INVAL && flags != 0) {
3024 CDEBUG(D_LAYOUT, "%s: specified both id and flags.\n",
3025 lod2obd(d)->obd_name);
3029 if (id == LCME_ID_INVAL && !flags) {
3030 CDEBUG(D_LAYOUT, "%s: no id or flags specified.\n",
3031 lod2obd(d)->obd_name);
3035 if (flags & LCME_FL_NEG) {
3036 neg_flags = flags & ~LCME_FL_NEG;
3040 left = lo->ldo_comp_cnt;
3044 for (i = (lo->ldo_comp_cnt - 1); i >= 0; i--) {
3045 struct lod_layout_component *lod_comp;
3047 lod_comp = &lo->ldo_comp_entries[i];
3049 if (id != LCME_ID_INVAL && id != lod_comp->llc_id)
3051 else if (flags && !(flags & lod_comp->llc_flags))
3053 else if (neg_flags && (neg_flags & lod_comp->llc_flags))
3056 if (left != (i + 1)) {
3057 CDEBUG(D_LAYOUT, "%s: this deletion will create "
3058 "a hole.\n", lod2obd(d)->obd_name);
3063 /* Mark the component as deleted */
3064 lod_comp->llc_id = LCME_ID_INVAL;
3066 /* Not instantiated component */
3067 if (lod_comp->llc_stripe == NULL)
3070 LASSERT(lod_comp->llc_stripe_count > 0);
3071 for (j = 0; j < lod_comp->llc_stripe_count; j++) {
3072 struct dt_object *obj = lod_comp->llc_stripe[j];
3076 rc = lod_sub_declare_destroy(env, obj, th);
3082 LASSERTF(left >= 0, "left = %d\n", left);
3083 if (left == lo->ldo_comp_cnt) {
3084 CDEBUG(D_LAYOUT, "%s: requested component id:%#x not found\n",
3085 lod2obd(d)->obd_name, id);
3089 memset(attr, 0, sizeof(*attr));
3090 attr->la_valid = LA_SIZE;
3091 rc = lod_sub_declare_attr_set(env, next, attr, th);
3096 info->lti_buf.lb_len = lod_comp_md_size(lo, false);
3097 rc = lod_sub_declare_xattr_set(env, next, &info->lti_buf,
3098 XATTR_NAME_LOV, 0, th);
3100 rc = lod_sub_declare_xattr_del(env, next, XATTR_NAME_LOV, th);
3107 * Declare layout add/set/del operations issued by special xattr names:
3109 * XATTR_LUSTRE_LOV.add add component(s) to existing file
3110 * XATTR_LUSTRE_LOV.del delete component(s) from existing file
3111 * XATTR_LUSTRE_LOV.set.$field set specified field of certain component(s)
3113 * \param[in] env execution environment
3114 * \param[in] dt object
3115 * \param[in] name name of xattr
3116 * \param[in] buf lu_buf contains xattr value
3117 * \param[in] th transaction handle
3119 * \retval 0 on success
3120 * \retval negative if failed
3122 static int lod_declare_modify_layout(const struct lu_env *env,
3123 struct dt_object *dt,
3125 const struct lu_buf *buf,
3128 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
3129 struct lod_object *lo = lod_dt_obj(dt);
3131 int rc, len = strlen(XATTR_LUSTRE_LOV);
3134 LASSERT(dt_object_exists(dt));
3136 if (strlen(name) <= len || name[len] != '.') {
3137 CDEBUG(D_LAYOUT, "%s: invalid xattr name: %s\n",
3138 lod2obd(d)->obd_name, name);
3143 rc = lod_striping_load(env, lo);
3147 /* the layout to be modified must be a composite layout */
3148 if (!lo->ldo_is_composite) {
3149 CDEBUG(D_LAYOUT, "%s: object "DFID" isn't a composite file.\n",
3150 lod2obd(d)->obd_name, PFID(lu_object_fid(&dt->do_lu)));
3151 GOTO(unlock, rc = -EINVAL);
3154 op = (char *)name + len;
3155 if (strcmp(op, "add") == 0) {
3156 rc = lod_declare_layout_add(env, dt, buf, th);
3157 } else if (strcmp(op, "del") == 0) {
3158 rc = lod_declare_layout_del(env, dt, buf, th);
3159 } else if (strncmp(op, "set", strlen("set")) == 0) {
3160 rc = lod_declare_layout_set(env, dt, op, buf, th);
3162 CDEBUG(D_LAYOUT, "%s: unsupported xattr name:%s\n",
3163 lod2obd(d)->obd_name, name);
3164 GOTO(unlock, rc = -ENOTSUPP);
3168 lod_striping_free(env, lo);
3174 * Convert a plain file lov_mds_md to a composite layout.
3176 * \param[in,out] info the thread info::lti_ea_store buffer contains little
3177 * endian plain file layout
3179 * \retval 0 on success, <0 on failure
3181 static int lod_layout_convert(struct lod_thread_info *info)
3183 struct lov_mds_md *lmm = info->lti_ea_store;
3184 struct lov_mds_md *lmm_save;
3185 struct lov_comp_md_v1 *lcm;
3186 struct lov_comp_md_entry_v1 *lcme;
3192 /* realloc buffer to a composite layout which contains one component */
3193 blob_size = lov_mds_md_size(le16_to_cpu(lmm->lmm_stripe_count),
3194 le32_to_cpu(lmm->lmm_magic));
3195 size = sizeof(*lcm) + sizeof(*lcme) + blob_size;
3197 OBD_ALLOC_LARGE(lmm_save, blob_size);
3199 GOTO(out, rc = -ENOMEM);
3201 memcpy(lmm_save, lmm, blob_size);
3203 if (info->lti_ea_store_size < size) {
3204 rc = lod_ea_store_resize(info, size);
3209 lcm = info->lti_ea_store;
3210 lcm->lcm_magic = cpu_to_le32(LOV_MAGIC_COMP_V1);
3211 lcm->lcm_size = cpu_to_le32(size);
3212 lcm->lcm_layout_gen = cpu_to_le32(le16_to_cpu(
3213 lmm_save->lmm_layout_gen));
3214 lcm->lcm_flags = cpu_to_le16(LCM_FL_NONE);
3215 lcm->lcm_entry_count = cpu_to_le16(1);
3216 lcm->lcm_mirror_count = 0;
3218 lcme = &lcm->lcm_entries[0];
3219 lcme->lcme_flags = cpu_to_le32(LCME_FL_INIT);
3220 lcme->lcme_extent.e_start = 0;
3221 lcme->lcme_extent.e_end = cpu_to_le64(OBD_OBJECT_EOF);
3222 lcme->lcme_offset = cpu_to_le32(sizeof(*lcm) + sizeof(*lcme));
3223 lcme->lcme_size = cpu_to_le32(blob_size);
3225 memcpy((char *)lcm + lcme->lcme_offset, (char *)lmm_save, blob_size);
3230 OBD_FREE_LARGE(lmm_save, blob_size);
3235 * Merge layouts to form a mirrored file.
3237 static int lod_declare_layout_merge(const struct lu_env *env,
3238 struct dt_object *dt, const struct lu_buf *mbuf,
3241 struct lod_thread_info *info = lod_env_info(env);
3242 struct lu_buf *buf = &info->lti_buf;
3243 struct lod_object *lo = lod_dt_obj(dt);
3244 struct lov_comp_md_v1 *lcm;
3245 struct lov_comp_md_v1 *cur_lcm;
3246 struct lov_comp_md_v1 *merge_lcm;
3247 struct lov_comp_md_entry_v1 *lcme;
3248 struct lov_mds_md_v1 *lmm;
3251 __u16 cur_entry_count;
3252 __u16 merge_entry_count;
3254 __u16 mirror_id = 0;
3261 merge_lcm = mbuf->lb_buf;
3262 if (mbuf->lb_len < sizeof(*merge_lcm))
3265 /* must be an existing layout from disk */
3266 if (le32_to_cpu(merge_lcm->lcm_magic) != LOV_MAGIC_COMP_V1)
3269 merge_entry_count = le16_to_cpu(merge_lcm->lcm_entry_count);
3271 /* do not allow to merge two mirrored files */
3272 if (le16_to_cpu(merge_lcm->lcm_mirror_count))
3275 /* verify the target buffer */
3276 rc = lod_get_lov_ea(env, lo);
3278 RETURN(rc ? : -ENODATA);
3280 cur_lcm = info->lti_ea_store;
3281 switch (le32_to_cpu(cur_lcm->lcm_magic)) {
3284 rc = lod_layout_convert(info);
3286 case LOV_MAGIC_COMP_V1:
3296 /* info->lti_ea_store could be reallocated in lod_layout_convert() */
3297 cur_lcm = info->lti_ea_store;
3298 cur_entry_count = le16_to_cpu(cur_lcm->lcm_entry_count);
3300 /* 'lcm_mirror_count + 1' is the current # of mirrors the file has */
3301 mirror_count = le16_to_cpu(cur_lcm->lcm_mirror_count) + 1;
3302 if (mirror_count + 1 > LUSTRE_MIRROR_COUNT_MAX)
3305 /* size of new layout */
3306 size = le32_to_cpu(cur_lcm->lcm_size) +
3307 le32_to_cpu(merge_lcm->lcm_size) - sizeof(*cur_lcm);
3309 memset(buf, 0, sizeof(*buf));
3310 lu_buf_alloc(buf, size);
3311 if (buf->lb_buf == NULL)
3315 memcpy(lcm, cur_lcm, sizeof(*lcm) + cur_entry_count * sizeof(*lcme));
3317 offset = sizeof(*lcm) +
3318 sizeof(*lcme) * (cur_entry_count + merge_entry_count);
3319 for (i = 0; i < cur_entry_count; i++) {
3320 struct lov_comp_md_entry_v1 *cur_lcme;
3322 lcme = &lcm->lcm_entries[i];
3323 cur_lcme = &cur_lcm->lcm_entries[i];
3325 lcme->lcme_offset = cpu_to_le32(offset);
3326 memcpy((char *)lcm + offset,
3327 (char *)cur_lcm + le32_to_cpu(cur_lcme->lcme_offset),
3328 le32_to_cpu(lcme->lcme_size));
3330 offset += le32_to_cpu(lcme->lcme_size);
3332 if (mirror_count == 1 &&
3333 mirror_id_of(le32_to_cpu(lcme->lcme_id)) == 0) {
3334 /* Add mirror from a non-flr file, create new mirror ID.
3335 * Otherwise, keep existing mirror's component ID, used
3336 * for mirror extension.
3338 id = pflr_id(1, i + 1);
3339 lcme->lcme_id = cpu_to_le32(id);
3342 id = max(le32_to_cpu(lcme->lcme_id), id);
3345 mirror_id = mirror_id_of(id) + 1;
3347 /* check if first entry in new layout is DOM */
3348 lmm = (struct lov_mds_md_v1 *)((char *)merge_lcm +
3349 merge_lcm->lcm_entries[0].lcme_offset);
3350 merge_has_dom = lov_pattern(le32_to_cpu(lmm->lmm_pattern)) ==
3353 for (i = 0; i < merge_entry_count; i++) {
3354 struct lov_comp_md_entry_v1 *merge_lcme;
3356 merge_lcme = &merge_lcm->lcm_entries[i];
3357 lcme = &lcm->lcm_entries[cur_entry_count + i];
3359 *lcme = *merge_lcme;
3360 lcme->lcme_offset = cpu_to_le32(offset);
3361 if (merge_has_dom && i == 0)
3362 lcme->lcme_flags |= cpu_to_le32(LCME_FL_STALE);
3364 id = pflr_id(mirror_id, i + 1);
3365 lcme->lcme_id = cpu_to_le32(id);
3367 memcpy((char *)lcm + offset,
3368 (char *)merge_lcm + le32_to_cpu(merge_lcme->lcme_offset),
3369 le32_to_cpu(lcme->lcme_size));
3371 offset += le32_to_cpu(lcme->lcme_size);
3374 /* fixup layout information */
3375 lod_obj_inc_layout_gen(lo);
3376 lcm->lcm_layout_gen = cpu_to_le32(lo->ldo_layout_gen);
3377 lcm->lcm_size = cpu_to_le32(size);
3378 lcm->lcm_entry_count = cpu_to_le16(cur_entry_count + merge_entry_count);
3379 lcm->lcm_mirror_count = cpu_to_le16(mirror_count);
3380 if ((le16_to_cpu(lcm->lcm_flags) & LCM_FL_FLR_MASK) == LCM_FL_NONE)
3381 lcm->lcm_flags = cpu_to_le32(LCM_FL_RDONLY);
3383 rc = lod_striping_reload(env, lo, buf);
3387 rc = lod_sub_declare_xattr_set(env, dt_object_child(dt), buf,
3388 XATTR_NAME_LOV, LU_XATTR_REPLACE, th);
3396 * Split layouts, just set the LOVEA with the layout from mbuf.
3398 static int lod_declare_layout_split(const struct lu_env *env,
3399 struct dt_object *dt, const struct lu_buf *mbuf,
3402 struct lod_object *lo = lod_dt_obj(dt);
3403 struct lov_comp_md_v1 *lcm = mbuf->lb_buf;
3407 lod_obj_inc_layout_gen(lo);
3408 lcm->lcm_layout_gen = cpu_to_le32(lo->ldo_layout_gen);
3410 rc = lod_striping_reload(env, lo, mbuf);
3414 rc = lod_sub_declare_xattr_set(env, dt_object_child(dt), mbuf,
3415 XATTR_NAME_LOV, LU_XATTR_REPLACE, th);
3420 * Implementation of dt_object_operations::do_declare_xattr_set.
3422 * \see dt_object_operations::do_declare_xattr_set() in the API description
3425 * the extension to the API:
3426 * - declaring LOVEA requests striping creation
3427 * - LU_XATTR_REPLACE means layout swap
3429 static int lod_declare_xattr_set(const struct lu_env *env,
3430 struct dt_object *dt,
3431 const struct lu_buf *buf,
3432 const char *name, int fl,
3435 struct dt_object *next = dt_object_child(dt);
3436 struct lu_attr *attr = &lod_env_info(env)->lti_attr;
3441 mode = dt->do_lu.lo_header->loh_attr & S_IFMT;
3442 if ((S_ISREG(mode) || mode == 0) &&
3443 !(fl & (LU_XATTR_REPLACE | LU_XATTR_MERGE | LU_XATTR_SPLIT)) &&
3444 (strcmp(name, XATTR_NAME_LOV) == 0 ||
3445 strcmp(name, XATTR_LUSTRE_LOV) == 0)) {
3447 * this is a request to create object's striping.
3449 * allow to declare predefined striping on a new (!mode) object
3450 * which is supposed to be replay of regular file creation
3451 * (when LOV setting is declared)
3453 * LU_XATTR_REPLACE is set to indicate a layout swap
3455 if (dt_object_exists(dt)) {
3456 rc = dt_attr_get(env, next, attr);
3460 memset(attr, 0, sizeof(*attr));
3461 attr->la_valid = LA_TYPE | LA_MODE;
3462 attr->la_mode = S_IFREG;
3464 rc = lod_declare_striped_create(env, dt, attr, buf, th);
3465 } else if (fl & LU_XATTR_MERGE) {
3466 LASSERT(strcmp(name, XATTR_NAME_LOV) == 0 ||
3467 strcmp(name, XATTR_LUSTRE_LOV) == 0);
3468 rc = lod_declare_layout_merge(env, dt, buf, th);
3469 } else if (fl & LU_XATTR_SPLIT) {
3470 LASSERT(strcmp(name, XATTR_NAME_LOV) == 0 ||
3471 strcmp(name, XATTR_LUSTRE_LOV) == 0);
3472 rc = lod_declare_layout_split(env, dt, buf, th);
3473 } else if (S_ISREG(mode) &&
3474 strlen(name) >= sizeof(XATTR_LUSTRE_LOV) + 3 &&
3475 allowed_lustre_lov(name)) {
3477 * this is a request to modify object's striping.
3478 * add/set/del component(s).
3480 if (!dt_object_exists(dt))
3483 rc = lod_declare_modify_layout(env, dt, name, buf, th);
3484 } else if (S_ISDIR(mode)) {
3485 rc = lod_dir_declare_xattr_set(env, dt, buf, name, fl, th);
3486 } else if (strcmp(name, XATTR_NAME_FID) == 0) {
3487 rc = lod_replace_parent_fid(env, dt, buf, th, true);
3489 rc = lod_sub_declare_xattr_set(env, next, buf, name, fl, th);
3496 * Apply xattr changes to the object.
3498 * Applies xattr changes to the object and the stripes if the latter exist.
3500 * \param[in] env execution environment
3501 * \param[in] dt object
3502 * \param[in] buf buffer pointing to the new value of xattr
3503 * \param[in] name name of xattr
3504 * \param[in] fl flags
3505 * \param[in] th transaction handle
3507 * \retval 0 on success
3508 * \retval negative if failed
3510 static int lod_xattr_set_internal(const struct lu_env *env,
3511 struct dt_object *dt,
3512 const struct lu_buf *buf,
3513 const char *name, int fl,
3516 struct dt_object *next = dt_object_child(dt);
3517 struct lod_object *lo = lod_dt_obj(dt);
3522 rc = lod_sub_xattr_set(env, next, buf, name, fl, th);
3523 if (rc != 0 || !S_ISDIR(dt->do_lu.lo_header->loh_attr))
3526 /* Note: Do not set LinkEA on sub-stripes, otherwise
3527 * it will confuse the fid2path process(see mdt_path_current()).
3528 * The linkEA between master and sub-stripes is set in
3529 * lod_xattr_set_lmv(). */
3530 if (lo->ldo_dir_stripe_count == 0 || strcmp(name, XATTR_NAME_LINK) == 0)
3533 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
3534 if (!lo->ldo_stripe[i])
3537 if (!dt_object_exists(lo->ldo_stripe[i]))
3540 rc = lod_sub_xattr_set(env, lo->ldo_stripe[i], buf, name,
3550 * Delete an extended attribute.
3552 * Deletes specified xattr from the object and the stripes if the latter exist.
3554 * \param[in] env execution environment
3555 * \param[in] dt object
3556 * \param[in] name name of xattr
3557 * \param[in] th transaction handle
3559 * \retval 0 on success
3560 * \retval negative if failed
3562 static int lod_xattr_del_internal(const struct lu_env *env,
3563 struct dt_object *dt,
3564 const char *name, struct thandle *th)
3566 struct dt_object *next = dt_object_child(dt);
3567 struct lod_object *lo = lod_dt_obj(dt);
3572 rc = lod_sub_xattr_del(env, next, name, th);
3573 if (rc != 0 || !S_ISDIR(dt->do_lu.lo_header->loh_attr))
3576 if (lo->ldo_dir_stripe_count == 0)
3579 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
3580 LASSERT(lo->ldo_stripe[i]);
3582 rc = lod_sub_xattr_del(env, lo->ldo_stripe[i], name, th);
3591 * Set default striping on a directory.
3593 * Sets specified striping on a directory object unless it matches the default
3594 * striping (LOVEA_DELETE_VALUES() macro). In the latter case remove existing
3595 * EA. This striping will be used when regular file is being created in this
3598 * \param[in] env execution environment
3599 * \param[in] dt the striped object
3600 * \param[in] buf buffer with the striping
3601 * \param[in] name name of EA
3602 * \param[in] fl xattr flag (see OSD API description)
3603 * \param[in] th transaction handle
3605 * \retval 0 on success
3606 * \retval negative if failed
3608 static int lod_xattr_set_lov_on_dir(const struct lu_env *env,
3609 struct dt_object *dt,
3610 const struct lu_buf *buf,
3611 const char *name, int fl,
3614 struct lov_user_md_v1 *lum;
3615 struct lov_user_md_v3 *v3 = NULL;
3616 const char *pool_name = NULL;
3621 LASSERT(buf != NULL && buf->lb_buf != NULL);
3624 switch (lum->lmm_magic) {
3625 case LOV_USER_MAGIC_SPECIFIC:
3626 case LOV_USER_MAGIC_V3:
3628 if (v3->lmm_pool_name[0] != '\0')
3629 pool_name = v3->lmm_pool_name;
3631 case LOV_USER_MAGIC_V1:
3632 /* if { size, offset, count } = { 0, -1, 0 } and no pool
3633 * (i.e. all default values specified) then delete default
3634 * striping from dir. */
3636 "set default striping: sz %u # %u offset %d %s %s\n",
3637 (unsigned)lum->lmm_stripe_size,
3638 (unsigned)lum->lmm_stripe_count,
3639 (int)lum->lmm_stripe_offset,
3640 v3 ? "from" : "", v3 ? v3->lmm_pool_name : "");
3642 is_del = LOVEA_DELETE_VALUES(lum->lmm_stripe_size,
3643 lum->lmm_stripe_count,
3644 lum->lmm_stripe_offset,
3647 case LOV_USER_MAGIC_COMP_V1:
3649 struct lov_comp_md_v1 *lcm = (struct lov_comp_md_v1 *)lum;
3650 struct lov_comp_md_entry_v1 *lcme;
3653 comp_cnt = le16_to_cpu(lcm->lcm_entry_count);
3654 for (i = 0; i < comp_cnt; i++) {
3655 lcme = &lcm->lcm_entries[i];
3656 if (lcme->lcme_flags & cpu_to_le32(LCME_FL_EXTENSION)) {
3657 lcm->lcm_magic = cpu_to_le32(LOV_MAGIC_SEL);
3666 CERROR("Invalid magic %x\n", lum->lmm_magic);
3671 rc = lod_xattr_del_internal(env, dt, name, th);
3675 rc = lod_xattr_set_internal(env, dt, buf, name, fl, th);
3682 * Set default striping on a directory object.
3684 * Sets specified striping on a directory object unless it matches the default
3685 * striping (LOVEA_DELETE_VALUES() macro). In the latter case remove existing
3686 * EA. This striping will be used when a new directory is being created in the
3689 * \param[in] env execution environment
3690 * \param[in] dt the striped object
3691 * \param[in] buf buffer with the striping
3692 * \param[in] name name of EA
3693 * \param[in] fl xattr flag (see OSD API description)
3694 * \param[in] th transaction handle
3696 * \retval 0 on success
3697 * \retval negative if failed
3699 static int lod_xattr_set_default_lmv_on_dir(const struct lu_env *env,
3700 struct dt_object *dt,
3701 const struct lu_buf *buf,
3702 const char *name, int fl,
3705 struct lmv_user_md_v1 *lum;
3710 LASSERT(buf != NULL && buf->lb_buf != NULL);
3714 "set default stripe_count # %u stripe_offset %d hash %u\n",
3715 le32_to_cpu(lum->lum_stripe_count),
3716 (int)le32_to_cpu(lum->lum_stripe_offset),
3717 le32_to_cpu(lum->lum_hash_type));
3719 if (LMVEA_DELETE_VALUES((le32_to_cpu(lum->lum_stripe_count)),
3720 le32_to_cpu(lum->lum_stripe_offset)) &&
3721 le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC) {
3722 rc = lod_xattr_del_internal(env, dt, name, th);
3726 rc = lod_xattr_set_internal(env, dt, buf, name, fl, th);
3735 * Turn directory into a striped directory.
3737 * During replay the client sends the striping created before MDT
3738 * failure, then the layer above LOD sends this defined striping
3739 * using ->do_xattr_set(), so LOD uses this method to replay creation
3740 * of the stripes. Notice the original information for the striping
3741 * (#stripes, FIDs, etc) was transferred in declare path.
3743 * \param[in] env execution environment
3744 * \param[in] dt the striped object
3745 * \param[in] buf not used currently
3746 * \param[in] name not used currently
3747 * \param[in] fl xattr flag (see OSD API description)
3748 * \param[in] th transaction handle
3750 * \retval 0 on success
3751 * \retval negative if failed
3753 static int lod_xattr_set_lmv(const struct lu_env *env, struct dt_object *dt,
3754 const struct lu_buf *buf, const char *name,
3755 int fl, struct thandle *th)
3757 struct lod_object *lo = lod_dt_obj(dt);
3758 struct lod_thread_info *info = lod_env_info(env);
3759 struct lu_attr *attr = &info->lti_attr;
3760 struct dt_object_format *dof = &info->lti_format;
3761 struct lu_buf lmv_buf;
3762 struct lu_buf slave_lmv_buf;
3763 struct lmv_mds_md_v1 *lmm;
3764 struct lmv_mds_md_v1 *slave_lmm = NULL;
3765 struct dt_insert_rec *rec = &info->lti_dt_rec;
3770 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr))
3773 /* The stripes are supposed to be allocated in declare phase,
3774 * if there are no stripes being allocated, it will skip */
3775 if (lo->ldo_dir_stripe_count == 0) {
3776 if (lo->ldo_dir_is_foreign) {
3777 rc = lod_sub_xattr_set(env, dt_object_child(dt), buf,
3778 XATTR_NAME_LMV, fl, th);
3785 rc = dt_attr_get(env, dt_object_child(dt), attr);
3789 attr->la_valid = LA_ATIME | LA_MTIME | LA_CTIME |
3790 LA_MODE | LA_UID | LA_GID | LA_TYPE | LA_PROJID;
3791 dof->dof_type = DFT_DIR;
3793 rc = lod_prep_lmv_md(env, dt, &lmv_buf);
3796 lmm = lmv_buf.lb_buf;
3798 OBD_ALLOC_PTR(slave_lmm);
3799 if (slave_lmm == NULL)
3802 lod_prep_slave_lmv_md(slave_lmm, lmm);
3803 slave_lmv_buf.lb_buf = slave_lmm;
3804 slave_lmv_buf.lb_len = sizeof(*slave_lmm);
3806 rec->rec_type = S_IFDIR;
3807 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
3808 struct dt_object *dto = lo->ldo_stripe[i];
3809 char *stripe_name = info->lti_key;
3810 struct lu_name *sname;
3811 struct linkea_data ldata = { NULL };
3812 struct lu_buf linkea_buf;
3814 /* OBD_FAIL_MDS_STRIPE_FID may leave stripe uninitialized */
3818 /* fail a remote stripe creation */
3819 if (i && OBD_FAIL_CHECK(OBD_FAIL_MDS_STRIPE_CREATE))
3822 /* don't create stripe if:
3823 * 1. it's source stripe of migrating directory
3824 * 2. it's existed stripe of splitting directory
3826 if ((lod_is_migrating(lo) && i >= lo->ldo_dir_migrate_offset) ||
3827 (lod_is_splitting(lo) && i < lo->ldo_dir_split_offset)) {
3828 if (!dt_object_exists(dto))
3829 GOTO(out, rc = -EINVAL);
3831 dt_write_lock(env, dto, DT_TGT_CHILD);
3832 rc = lod_sub_create(env, dto, attr, NULL, dof, th);
3834 dt_write_unlock(env, dto);
3838 rc = lod_sub_ref_add(env, dto, th);
3839 dt_write_unlock(env, dto);
3843 rec->rec_fid = lu_object_fid(&dto->do_lu);
3844 rc = lod_sub_insert(env, dto,
3845 (const struct dt_rec *)rec,
3846 (const struct dt_key *)dot, th);
3851 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_SLAVE_LMV) ||
3852 cfs_fail_val != i) {
3853 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_LMV) &&
3855 slave_lmm->lmv_master_mdt_index =
3858 slave_lmm->lmv_master_mdt_index =
3861 rc = lod_sub_xattr_set(env, dto, &slave_lmv_buf,
3862 XATTR_NAME_LMV, 0, th);
3867 /* don't insert stripe if it's existed stripe of splitting
3868 * directory (this directory is striped).
3869 * NB, plain directory will insert itself as the first
3872 if (lod_is_splitting(lo) && lo->ldo_dir_split_offset > 1 &&
3873 lo->ldo_dir_split_offset > i)
3876 rec->rec_fid = lu_object_fid(&dt->do_lu);
3877 rc = lod_sub_insert(env, dto, (struct dt_rec *)rec,
3878 (const struct dt_key *)dotdot, th);
3882 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_NAME) &&
3884 snprintf(stripe_name, sizeof(info->lti_key), DFID":%d",
3885 PFID(lu_object_fid(&dto->do_lu)), i + 1);
3887 snprintf(stripe_name, sizeof(info->lti_key), DFID":%d",
3888 PFID(lu_object_fid(&dto->do_lu)), i);
3890 sname = lod_name_get(env, stripe_name, strlen(stripe_name));
3891 rc = linkea_links_new(&ldata, &info->lti_linkea_buf,
3892 sname, lu_object_fid(&dt->do_lu));
3896 linkea_buf.lb_buf = ldata.ld_buf->lb_buf;
3897 linkea_buf.lb_len = ldata.ld_leh->leh_len;
3898 rc = lod_sub_xattr_set(env, dto, &linkea_buf,
3899 XATTR_NAME_LINK, 0, th);
3903 rec->rec_fid = lu_object_fid(&dto->do_lu);
3904 rc = lod_sub_insert(env, dt_object_child(dt),
3905 (const struct dt_rec *)rec,
3906 (const struct dt_key *)stripe_name, th);
3910 rc = lod_sub_ref_add(env, dt_object_child(dt), th);
3915 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MASTER_LMV))
3916 rc = lod_sub_xattr_set(env, dt_object_child(dt),
3917 &lmv_buf, XATTR_NAME_LMV, fl, th);
3919 if (slave_lmm != NULL)
3920 OBD_FREE_PTR(slave_lmm);
3926 * Helper function to declare/execute creation of a striped directory
3928 * Called in declare/create object path, prepare striping for a directory
3929 * and prepare defaults data striping for the objects to be created in
3930 * that directory. Notice the function calls "declaration" or "execution"
3931 * methods depending on \a declare param. This is a consequence of the
3932 * current approach while we don't have natural distributed transactions:
3933 * we basically execute non-local updates in the declare phase. So, the
3934 * arguments for the both phases are the same and this is the reason for
3935 * this function to exist.
3937 * \param[in] env execution environment
3938 * \param[in] dt object
3939 * \param[in] attr attributes the stripes will be created with
3940 * \param[in] lmu lmv_user_md if MDT indices are specified
3941 * \param[in] dof format of stripes (see OSD API description)
3942 * \param[in] th transaction handle
3943 * \param[in] declare where to call "declare" or "execute" methods
3945 * \retval 0 on success
3946 * \retval negative if failed
3948 static int lod_dir_striping_create_internal(const struct lu_env *env,
3949 struct dt_object *dt,
3950 struct lu_attr *attr,
3951 const struct lu_buf *lmu,
3952 struct dt_object_format *dof,
3956 struct lod_thread_info *info = lod_env_info(env);
3957 struct lod_object *lo = lod_dt_obj(dt);
3958 const struct lod_default_striping *lds = lo->ldo_def_striping;
3962 LASSERT(ergo(lds != NULL,
3963 lds->lds_def_striping_set ||
3964 lds->lds_dir_def_striping_set));
3966 if (!LMVEA_DELETE_VALUES(lo->ldo_dir_stripe_count,
3967 lo->ldo_dir_stripe_offset)) {
3969 struct lmv_user_md_v1 *v1 = info->lti_ea_store;
3970 int stripe_count = lo->ldo_dir_stripe_count;
3972 if (info->lti_ea_store_size < sizeof(*v1)) {
3973 rc = lod_ea_store_resize(info, sizeof(*v1));
3976 v1 = info->lti_ea_store;
3979 memset(v1, 0, sizeof(*v1));
3980 v1->lum_magic = cpu_to_le32(LMV_USER_MAGIC);
3981 v1->lum_stripe_count = cpu_to_le32(stripe_count);
3982 v1->lum_stripe_offset =
3983 cpu_to_le32(lo->ldo_dir_stripe_offset);
3985 info->lti_buf.lb_buf = v1;
3986 info->lti_buf.lb_len = sizeof(*v1);
3987 lmu = &info->lti_buf;
3991 rc = lod_declare_xattr_set_lmv(env, dt, attr, lmu, dof,
3994 rc = lod_xattr_set_lmv(env, dt, lmu, XATTR_NAME_LMV, 0,
3999 /* foreign LMV EA case */
4001 struct lmv_foreign_md *lfm = lmu->lb_buf;
4003 if (lfm->lfm_magic == LMV_MAGIC_FOREIGN) {
4004 rc = lod_declare_xattr_set_lmv(env, dt, attr,
4008 if (lo->ldo_dir_is_foreign) {
4009 LASSERT(lo->ldo_foreign_lmv != NULL &&
4010 lo->ldo_foreign_lmv_size > 0);
4011 info->lti_buf.lb_buf = lo->ldo_foreign_lmv;
4012 info->lti_buf.lb_len = lo->ldo_foreign_lmv_size;
4013 lmu = &info->lti_buf;
4014 rc = lod_xattr_set_lmv(env, dt, lmu,
4015 XATTR_NAME_LMV, 0, th);
4020 /* Transfer default LMV striping from the parent */
4021 if (lds != NULL && lds->lds_dir_def_striping_set &&
4022 !(LMVEA_DELETE_VALUES(lds->lds_dir_def_stripe_count,
4023 lds->lds_dir_def_stripe_offset) &&
4024 le32_to_cpu(lds->lds_dir_def_hash_type) !=
4025 LMV_HASH_TYPE_UNKNOWN)) {
4026 struct lmv_user_md_v1 *v1 = info->lti_ea_store;
4028 if (info->lti_ea_store_size < sizeof(*v1)) {
4029 rc = lod_ea_store_resize(info, sizeof(*v1));
4032 v1 = info->lti_ea_store;
4035 memset(v1, 0, sizeof(*v1));
4036 v1->lum_magic = cpu_to_le32(LMV_USER_MAGIC);
4037 v1->lum_stripe_count =
4038 cpu_to_le32(lds->lds_dir_def_stripe_count);
4039 v1->lum_stripe_offset =
4040 cpu_to_le32(lds->lds_dir_def_stripe_offset);
4042 cpu_to_le32(lds->lds_dir_def_hash_type);
4044 info->lti_buf.lb_buf = v1;
4045 info->lti_buf.lb_len = sizeof(*v1);
4047 rc = lod_dir_declare_xattr_set(env, dt, &info->lti_buf,
4048 XATTR_NAME_DEFAULT_LMV,
4051 rc = lod_xattr_set_default_lmv_on_dir(env, dt,
4053 XATTR_NAME_DEFAULT_LMV, 0,
4059 /* Transfer default LOV striping from the parent */
4060 if (lds != NULL && lds->lds_def_striping_set &&
4061 lds->lds_def_comp_cnt != 0) {
4062 struct lov_mds_md *lmm;
4063 int lmm_size = lod_comp_md_size(lo, true);
4065 if (info->lti_ea_store_size < lmm_size) {
4066 rc = lod_ea_store_resize(info, lmm_size);
4070 lmm = info->lti_ea_store;
4072 rc = lod_generate_lovea(env, lo, lmm, &lmm_size, true);
4076 info->lti_buf.lb_buf = lmm;
4077 info->lti_buf.lb_len = lmm_size;
4080 rc = lod_dir_declare_xattr_set(env, dt, &info->lti_buf,
4081 XATTR_NAME_LOV, 0, th);
4083 rc = lod_xattr_set_lov_on_dir(env, dt, &info->lti_buf,
4084 XATTR_NAME_LOV, 0, th);
4092 static int lod_declare_dir_striping_create(const struct lu_env *env,
4093 struct dt_object *dt,
4094 struct lu_attr *attr,
4096 struct dt_object_format *dof,
4099 return lod_dir_striping_create_internal(env, dt, attr, lmu, dof, th,
4103 static int lod_dir_striping_create(const struct lu_env *env,
4104 struct dt_object *dt,
4105 struct lu_attr *attr,
4106 struct dt_object_format *dof,
4109 return lod_dir_striping_create_internal(env, dt, attr, NULL, dof, th,
4114 * Make LOV EA for striped object.
4116 * Generate striping information and store it in the LOV EA of the given
4117 * object. The caller must ensure nobody else is calling the function
4118 * against the object concurrently. The transaction must be started.
4119 * FLDB service must be running as well; it's used to map FID to the target,
4120 * which is stored in LOV EA.
4122 * \param[in] env execution environment for this thread
4123 * \param[in] lo LOD object
4124 * \param[in] th transaction handle
4126 * \retval 0 if LOV EA is stored successfully
4127 * \retval negative error number on failure
4129 static int lod_generate_and_set_lovea(const struct lu_env *env,
4130 struct lod_object *lo,
4133 struct lod_thread_info *info = lod_env_info(env);
4134 struct dt_object *next = dt_object_child(&lo->ldo_obj);
4135 struct lov_mds_md_v1 *lmm;
4141 if (lo->ldo_comp_cnt == 0 && !lo->ldo_is_foreign) {
4142 lod_striping_free(env, lo);
4143 rc = lod_sub_xattr_del(env, next, XATTR_NAME_LOV, th);
4147 lmm_size = lod_comp_md_size(lo, false);
4148 if (info->lti_ea_store_size < lmm_size) {
4149 rc = lod_ea_store_resize(info, lmm_size);
4153 lmm = info->lti_ea_store;
4155 rc = lod_generate_lovea(env, lo, lmm, &lmm_size, false);
4159 info->lti_buf.lb_buf = lmm;
4160 info->lti_buf.lb_len = lmm_size;
4161 rc = lod_sub_xattr_set(env, next, &info->lti_buf,
4162 XATTR_NAME_LOV, 0, th);
4166 static __u32 lod_gen_component_id(struct lod_object *lo,
4167 int mirror_id, int comp_idx);
4170 * Repeat an existing component
4172 * Creates a new layout by replicating an existing component. Uses striping
4173 * policy from previous component as a template for the striping for the new
4176 * New component starts with zero length, will be extended (or removed) before
4177 * returning layout to client.
4179 * NB: Reallocates layout components array (lo->ldo_comp_entries), invalidating
4180 * any pre-existing pointers to components. Handle with care.
4182 * \param[in] env execution environment for this thread
4183 * \param[in,out] lo object to update the layout of
4184 * \param[in] index index of component to copy
4186 * \retval 0 on success
4187 * \retval negative errno on error
4189 static int lod_layout_repeat_comp(const struct lu_env *env,
4190 struct lod_object *lo, int index)
4192 struct lod_layout_component *lod_comp;
4193 struct lod_layout_component *new_comp = NULL;
4194 struct lod_layout_component *comp_array;
4195 int rc = 0, i, new_cnt = lo->ldo_comp_cnt + 1;
4200 lod_comp = &lo->ldo_comp_entries[index];
4201 LASSERT(lod_comp_inited(lod_comp) && lod_comp->llc_id != LCME_ID_INVAL);
4203 CDEBUG(D_LAYOUT, "repeating component %d\n", index);
4205 OBD_ALLOC(comp_array, sizeof(*comp_array) * new_cnt);
4206 if (comp_array == NULL)
4207 GOTO(out, rc = -ENOMEM);
4209 for (i = 0; i < lo->ldo_comp_cnt; i++) {
4210 memcpy(&comp_array[i + offset], &lo->ldo_comp_entries[i],
4211 sizeof(*comp_array));
4213 /* Duplicate this component in to the next slot */
4215 new_comp = &comp_array[i + 1];
4216 memcpy(&comp_array[i + 1], &lo->ldo_comp_entries[i],
4217 sizeof(*comp_array));
4218 /* We must now skip this new component when copying */
4223 /* Set up copied component */
4224 new_comp->llc_flags &= ~LCME_FL_INIT;
4225 new_comp->llc_stripe = NULL;
4226 new_comp->llc_stripes_allocated = 0;
4227 new_comp->llc_stripe_offset = LOV_OFFSET_DEFAULT;
4228 /* for uninstantiated components, layout gen stores default stripe
4230 new_comp->llc_layout_gen = lod_comp->llc_stripe_offset;
4231 /* This makes the repeated component zero-length, placed at the end of
4232 * the preceding component */
4233 new_comp->llc_extent.e_start = new_comp->llc_extent.e_end;
4234 new_comp->llc_timestamp = lod_comp->llc_timestamp;
4235 new_comp->llc_pool = NULL;
4237 rc = lod_set_pool(&new_comp->llc_pool, lod_comp->llc_pool);
4241 if (new_comp->llc_ostlist.op_array) {
4242 __u32 *op_array = NULL;
4244 OBD_ALLOC(op_array, new_comp->llc_ostlist.op_size);
4246 GOTO(out, rc = -ENOMEM);
4247 memcpy(op_array, &new_comp->llc_ostlist.op_array,
4248 new_comp->llc_ostlist.op_size);
4249 new_comp->llc_ostlist.op_array = op_array;
4252 OBD_FREE(lo->ldo_comp_entries,
4253 sizeof(*comp_array) * lo->ldo_comp_cnt);
4254 lo->ldo_comp_entries = comp_array;
4255 lo->ldo_comp_cnt = new_cnt;
4257 /* Generate an id for the new component */
4258 mirror_id = mirror_id_of(new_comp->llc_id);
4259 new_comp->llc_id = LCME_ID_INVAL;
4260 new_comp->llc_id = lod_gen_component_id(lo, mirror_id, index + 1);
4261 if (new_comp->llc_id == LCME_ID_INVAL)
4262 GOTO(out, rc = -ERANGE);
4267 OBD_FREE(comp_array, sizeof(*comp_array) * new_cnt);
4272 static int lod_layout_data_init(struct lod_thread_info *info, __u32 comp_cnt)
4276 /* clear memory region that will be used for layout change */
4277 memset(&info->lti_layout_attr, 0, sizeof(struct lu_attr));
4278 info->lti_count = 0;
4280 if (info->lti_comp_size >= comp_cnt)
4283 if (info->lti_comp_size > 0) {
4284 OBD_FREE(info->lti_comp_idx,
4285 info->lti_comp_size * sizeof(__u32));
4286 info->lti_comp_size = 0;
4289 OBD_ALLOC(info->lti_comp_idx, comp_cnt * sizeof(__u32));
4290 if (!info->lti_comp_idx)
4293 info->lti_comp_size = comp_cnt;
4298 * Prepare new layout minus deleted components
4300 * Removes components marked for deletion (LCME_ID_INVAL) by copying to a new
4301 * layout and skipping those components. Removes stripe objects if any exist.
4304 * Reallocates layout components array (lo->ldo_comp_entries), invalidating
4305 * any pre-existing pointers to components.
4307 * Caller is responsible for updating mirror end (ldo_mirror[].lme_end).
4309 * \param[in] env execution environment for this thread
4310 * \param[in,out] lo object to update the layout of
4311 * \param[in] th transaction handle for this operation
4313 * \retval # of components deleted
4314 * \retval negative errno on error
4316 static int lod_layout_del_prep_layout(const struct lu_env *env,
4317 struct lod_object *lo,
4320 struct lod_layout_component *lod_comp;
4321 struct lod_thread_info *info = lod_env_info(env);
4322 int rc = 0, i, j, deleted = 0;
4326 LASSERT(lo->ldo_is_composite);
4327 LASSERT(lo->ldo_comp_cnt > 0 && lo->ldo_comp_entries != NULL);
4329 rc = lod_layout_data_init(info, lo->ldo_comp_cnt);
4333 for (i = 0; i < lo->ldo_comp_cnt; i++) {
4334 lod_comp = &lo->ldo_comp_entries[i];
4336 if (lod_comp->llc_id != LCME_ID_INVAL) {
4337 /* Build array of things to keep */
4338 info->lti_comp_idx[info->lti_count++] = i;
4342 lod_obj_set_pool(lo, i, NULL);
4343 if (lod_comp->llc_ostlist.op_array) {
4344 OBD_FREE(lod_comp->llc_ostlist.op_array,
4345 lod_comp->llc_ostlist.op_size);
4346 lod_comp->llc_ostlist.op_array = NULL;
4347 lod_comp->llc_ostlist.op_size = 0;
4351 CDEBUG(D_LAYOUT, "deleting comp %d, left %d\n", i,
4352 lo->ldo_comp_cnt - deleted);
4354 /* No striping info for this component */
4355 if (lod_comp->llc_stripe == NULL)
4358 LASSERT(lod_comp->llc_stripe_count > 0);
4359 for (j = 0; j < lod_comp->llc_stripe_count; j++) {
4360 struct dt_object *obj = lod_comp->llc_stripe[j];
4365 /* components which are not init have no sub objects
4367 if (lod_comp_inited(lod_comp)) {
4368 rc = lod_sub_destroy(env, obj, th);
4373 lu_object_put(env, &obj->do_lu);
4374 lod_comp->llc_stripe[j] = NULL;
4376 OBD_FREE(lod_comp->llc_stripe, sizeof(*lod_comp->llc_stripe) *
4377 lod_comp->llc_stripes_allocated);
4378 lod_comp->llc_stripe = NULL;
4379 OBD_FREE(lod_comp->llc_ost_indices,
4380 sizeof(__u32) * lod_comp->llc_stripes_allocated);
4381 lod_comp->llc_ost_indices = NULL;
4382 lod_comp->llc_stripes_allocated = 0;
4385 /* info->lti_count has the amount of left components */
4386 LASSERTF(info->lti_count >= 0 && info->lti_count < lo->ldo_comp_cnt,
4387 "left = %d, lo->ldo_comp_cnt %d\n", (int)info->lti_count,
4388 (int)lo->ldo_comp_cnt);
4390 if (info->lti_count > 0) {
4391 struct lod_layout_component *comp_array;
4393 OBD_ALLOC(comp_array, sizeof(*comp_array) * info->lti_count);
4394 if (comp_array == NULL)
4395 GOTO(out, rc = -ENOMEM);
4397 for (i = 0; i < info->lti_count; i++) {
4398 memcpy(&comp_array[i],
4399 &lo->ldo_comp_entries[info->lti_comp_idx[i]],
4400 sizeof(*comp_array));
4403 OBD_FREE(lo->ldo_comp_entries,
4404 sizeof(*comp_array) * lo->ldo_comp_cnt);
4405 lo->ldo_comp_entries = comp_array;
4406 lo->ldo_comp_cnt = info->lti_count;
4408 lod_free_comp_entries(lo);
4413 return rc ? rc : deleted;
4417 * Delete layout component(s)
4419 * This function sets up the layout data in the env and does the setattrs
4420 * required to write out the new layout. The layout itself is modified in
4421 * lod_layout_del_prep_layout.
4423 * \param[in] env execution environment for this thread
4424 * \param[in] dt object
4425 * \param[in] th transaction handle
4427 * \retval 0 on success
4428 * \retval negative error number on failure
4430 static int lod_layout_del(const struct lu_env *env, struct dt_object *dt,
4433 struct lod_object *lo = lod_dt_obj(dt);
4434 struct dt_object *next = dt_object_child(dt);
4435 struct lu_attr *attr = &lod_env_info(env)->lti_attr;
4438 LASSERT(lo->ldo_mirror_count == 1);
4440 rc = lod_layout_del_prep_layout(env, lo, th);
4444 /* Only do this if we didn't delete all components */
4445 if (lo->ldo_comp_cnt > 0) {
4446 lo->ldo_mirrors[0].lme_end = lo->ldo_comp_cnt - 1;
4447 lod_obj_inc_layout_gen(lo);
4450 LASSERT(dt_object_exists(dt));
4451 rc = dt_attr_get(env, next, attr);
4455 if (attr->la_size > 0) {
4457 attr->la_valid = LA_SIZE;
4458 rc = lod_sub_attr_set(env, next, attr, th);
4463 rc = lod_generate_and_set_lovea(env, lo, th);
4467 lod_striping_free(env, lo);
4472 static int lod_get_default_lov_striping(const struct lu_env *env,
4473 struct lod_object *lo,
4474 struct lod_default_striping *lds,
4475 struct dt_allocation_hint *ah);
4477 * Implementation of dt_object_operations::do_xattr_set.
4479 * Sets specified extended attribute on the object. Three types of EAs are
4481 * LOV EA - stores striping for a regular file or default striping (when set
4483 * LMV EA - stores a marker for the striped directories
4484 * DMV EA - stores default directory striping
4486 * When striping is applied to a non-striped existing object (this is called
4487 * late striping), then LOD notices the caller wants to turn the object into a
4488 * striped one. The stripe objects are created and appropriate EA is set:
4489 * LOV EA storing all the stripes directly or LMV EA storing just a small header
4490 * with striping configuration.
4492 * \see dt_object_operations::do_xattr_set() in the API description for details.
4494 static int lod_xattr_set(const struct lu_env *env,
4495 struct dt_object *dt, const struct lu_buf *buf,
4496 const char *name, int fl, struct thandle *th)
4498 struct dt_object *next = dt_object_child(dt);
4503 if (S_ISDIR(dt->do_lu.lo_header->loh_attr) &&
4504 !strcmp(name, XATTR_NAME_LMV)) {
4506 case LU_XATTR_CREATE:
4507 rc = lod_dir_striping_create(env, dt, NULL, NULL, th);
4510 case LU_XATTR_REPLACE:
4511 rc = lod_dir_layout_set(env, dt, buf, fl, th);
4518 } else if (S_ISDIR(dt->do_lu.lo_header->loh_attr) &&
4519 strcmp(name, XATTR_NAME_LOV) == 0) {
4520 struct lod_default_striping *lds = lod_lds_buf_get(env);
4521 struct lov_user_md_v1 *v1 = buf->lb_buf;
4522 char pool[LOV_MAXPOOLNAME + 1];
4525 /* get existing striping config */
4526 rc = lod_get_default_lov_striping(env, lod_dt_obj(dt), lds,
4531 memset(pool, 0, sizeof(pool));
4532 if (lds->lds_def_striping_set == 1)
4533 lod_layout_get_pool(lds->lds_def_comp_entries,
4534 lds->lds_def_comp_cnt, pool,
4537 is_del = LOVEA_DELETE_VALUES(v1->lmm_stripe_size,
4538 v1->lmm_stripe_count,
4539 v1->lmm_stripe_offset,
4542 /* Retain the pool name if it is not given */
4543 if (v1->lmm_magic == LOV_USER_MAGIC_V1 && pool[0] != '\0' &&
4545 struct lod_thread_info *info = lod_env_info(env);
4546 struct lov_user_md_v3 *v3 = info->lti_ea_store;
4548 memset(v3, 0, sizeof(*v3));
4549 v3->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V3);
4550 v3->lmm_pattern = cpu_to_le32(v1->lmm_pattern);
4551 v3->lmm_stripe_count =
4552 cpu_to_le32(v1->lmm_stripe_count);
4553 v3->lmm_stripe_offset =
4554 cpu_to_le32(v1->lmm_stripe_offset);
4555 v3->lmm_stripe_size = cpu_to_le32(v1->lmm_stripe_size);
4557 strlcpy(v3->lmm_pool_name, pool,
4558 sizeof(v3->lmm_pool_name));
4560 info->lti_buf.lb_buf = v3;
4561 info->lti_buf.lb_len = sizeof(*v3);
4562 rc = lod_xattr_set_lov_on_dir(env, dt, &info->lti_buf,
4565 rc = lod_xattr_set_lov_on_dir(env, dt, buf, name,
4569 if (lds->lds_def_striping_set == 1 &&
4570 lds->lds_def_comp_entries != NULL)
4571 lod_free_def_comp_entries(lds);
4574 } else if (S_ISDIR(dt->do_lu.lo_header->loh_attr) &&
4575 strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0) {
4577 rc = lod_xattr_set_default_lmv_on_dir(env, dt, buf, name, fl,
4580 } else if (S_ISREG(dt->do_lu.lo_header->loh_attr) &&
4581 (strcmp(name, XATTR_NAME_LOV) == 0 ||
4582 strcmp(name, XATTR_LUSTRE_LOV) == 0 ||
4583 allowed_lustre_lov(name))) {
4584 /* in case of lov EA swap, just set it
4585 * if not, it is a replay so check striping match what we
4586 * already have during req replay, declare_xattr_set()
4587 * defines striping, then create() does the work */
4588 if (fl & LU_XATTR_REPLACE) {
4589 /* free stripes, then update disk */
4590 lod_striping_free(env, lod_dt_obj(dt));
4592 rc = lod_sub_xattr_set(env, next, buf, name, fl, th);
4593 } else if (dt_object_remote(dt)) {
4594 /* This only happens during migration, see
4595 * mdd_migrate_create(), in which Master MDT will
4596 * create a remote target object, and only set
4597 * (migrating) stripe EA on the remote object,
4598 * and does not need creating each stripes. */
4599 rc = lod_sub_xattr_set(env, next, buf, name,
4601 } else if (strcmp(name, XATTR_LUSTRE_LOV".del") == 0) {
4602 /* delete component(s) */
4603 LASSERT(lod_dt_obj(dt)->ldo_comp_cached);
4604 rc = lod_layout_del(env, dt, th);
4607 * When 'name' is XATTR_LUSTRE_LOV or XATTR_NAME_LOV,
4608 * it's going to create create file with specified
4609 * component(s), the striping must have not being
4610 * cached in this case;
4612 * Otherwise, it's going to add/change component(s) to
4613 * an existing file, the striping must have been cached
4616 LASSERT(equi(!strcmp(name, XATTR_LUSTRE_LOV) ||
4617 !strcmp(name, XATTR_NAME_LOV),
4618 !lod_dt_obj(dt)->ldo_comp_cached));
4620 rc = lod_striped_create(env, dt, NULL, NULL, th);
4623 } else if (strcmp(name, XATTR_NAME_FID) == 0) {
4624 rc = lod_replace_parent_fid(env, dt, buf, th, false);
4629 /* then all other xattr */
4630 rc = lod_xattr_set_internal(env, dt, buf, name, fl, th);
4636 * Implementation of dt_object_operations::do_declare_xattr_del.
4638 * \see dt_object_operations::do_declare_xattr_del() in the API description
4641 static int lod_declare_xattr_del(const struct lu_env *env,
4642 struct dt_object *dt, const char *name,
4645 struct lod_object *lo = lod_dt_obj(dt);
4646 struct dt_object *next = dt_object_child(dt);
4651 rc = lod_sub_declare_xattr_del(env, next, name, th);
4655 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr))
4658 /* NB: don't delete stripe LMV, because when we do this, normally we
4659 * will remove stripes, besides, if directory LMV is corrupt, this will
4660 * prevent deleting its LMV and fixing it (via LFSCK).
4662 if (!strcmp(name, XATTR_NAME_LMV))
4665 rc = lod_striping_load(env, lo);
4669 if (lo->ldo_dir_stripe_count == 0)
4672 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
4673 struct dt_object *dto = lo->ldo_stripe[i];
4678 rc = lod_sub_declare_xattr_del(env, dto, name, th);
4687 * Implementation of dt_object_operations::do_xattr_del.
4689 * If EA storing a regular striping is being deleted, then release
4690 * all the references to the stripe objects in core.
4692 * \see dt_object_operations::do_xattr_del() in the API description for details.
4694 static int lod_xattr_del(const struct lu_env *env, struct dt_object *dt,
4695 const char *name, struct thandle *th)
4697 struct dt_object *next = dt_object_child(dt);
4698 struct lod_object *lo = lod_dt_obj(dt);
4703 if (!strcmp(name, XATTR_NAME_LOV) || !strcmp(name, XATTR_NAME_LMV))
4704 lod_striping_free(env, lod_dt_obj(dt));
4706 rc = lod_sub_xattr_del(env, next, name, th);
4707 if (rc != 0 || !S_ISDIR(dt->do_lu.lo_header->loh_attr))
4710 if (!strcmp(name, XATTR_NAME_LMV))
4713 if (lo->ldo_dir_stripe_count == 0)
4716 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
4717 struct dt_object *dto = lo->ldo_stripe[i];
4722 rc = lod_sub_xattr_del(env, dto, name, th);
4731 * Implementation of dt_object_operations::do_xattr_list.
4733 * \see dt_object_operations::do_xattr_list() in the API description
4736 static int lod_xattr_list(const struct lu_env *env,
4737 struct dt_object *dt, const struct lu_buf *buf)
4739 return dt_xattr_list(env, dt_object_child(dt), buf);
4742 static inline int lod_object_will_be_striped(int is_reg, const struct lu_fid *fid)
4744 return (is_reg && fid_seq(fid) != FID_SEQ_LOCAL_FILE);
4748 * Copy OST list from layout provided by user.
4750 * \param[in] lod_comp layout_component to be filled
4751 * \param[in] v3 LOV EA V3 user data
4753 * \retval 0 on success
4754 * \retval negative if failed
4756 int lod_comp_copy_ost_lists(struct lod_layout_component *lod_comp,
4757 struct lov_user_md_v3 *v3)
4763 if (v3->lmm_stripe_offset == LOV_OFFSET_DEFAULT)
4764 v3->lmm_stripe_offset = v3->lmm_objects[0].l_ost_idx;
4766 if (lod_comp->llc_ostlist.op_array) {
4767 if (lod_comp->llc_ostlist.op_size >=
4768 v3->lmm_stripe_count * sizeof(__u32)) {
4769 lod_comp->llc_ostlist.op_count =
4770 v3->lmm_stripe_count;
4773 OBD_FREE(lod_comp->llc_ostlist.op_array,
4774 lod_comp->llc_ostlist.op_size);
4777 /* copy ost list from lmm */
4778 lod_comp->llc_ostlist.op_count = v3->lmm_stripe_count;
4779 lod_comp->llc_ostlist.op_size = v3->lmm_stripe_count * sizeof(__u32);
4780 OBD_ALLOC(lod_comp->llc_ostlist.op_array,
4781 lod_comp->llc_ostlist.op_size);
4782 if (!lod_comp->llc_ostlist.op_array)
4785 for (j = 0; j < v3->lmm_stripe_count; j++) {
4786 lod_comp->llc_ostlist.op_array[j] =
4787 v3->lmm_objects[j].l_ost_idx;
4795 * Get default striping.
4797 * \param[in] env execution environment
4798 * \param[in] lo object
4799 * \param[out] lds default striping
4801 * \retval 0 on success
4802 * \retval negative if failed
4804 static int lod_get_default_lov_striping(const struct lu_env *env,
4805 struct lod_object *lo,
4806 struct lod_default_striping *lds,
4807 struct dt_allocation_hint *ah)
4809 struct lod_thread_info *info = lod_env_info(env);
4810 struct lov_user_md_v1 *v1 = NULL;
4811 struct lov_user_md_v3 *v3 = NULL;
4812 struct lov_comp_md_v1 *comp_v1 = NULL;
4820 rc = lod_get_lov_ea(env, lo);
4824 if (rc < (typeof(rc))sizeof(struct lov_user_md))
4827 v1 = info->lti_ea_store;
4828 if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V1)) {
4829 lustre_swab_lov_user_md_v1(v1);
4830 } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V3)) {
4831 v3 = (struct lov_user_md_v3 *)v1;
4832 lustre_swab_lov_user_md_v3(v3);
4833 } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_SPECIFIC)) {
4834 v3 = (struct lov_user_md_v3 *)v1;
4835 lustre_swab_lov_user_md_v3(v3);
4836 lustre_swab_lov_user_md_objects(v3->lmm_objects,
4837 v3->lmm_stripe_count);
4838 } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_COMP_V1) ||
4839 v1->lmm_magic == __swab32(LOV_USER_MAGIC_SEL)) {
4840 comp_v1 = (struct lov_comp_md_v1 *)v1;
4841 lustre_swab_lov_comp_md_v1(comp_v1);
4844 if (v1->lmm_magic != LOV_MAGIC_V3 && v1->lmm_magic != LOV_MAGIC_V1 &&
4845 v1->lmm_magic != LOV_MAGIC_COMP_V1 &&
4846 v1->lmm_magic != LOV_MAGIC_SEL &&
4847 v1->lmm_magic != LOV_USER_MAGIC_SPECIFIC)
4850 if ((v1->lmm_magic == LOV_MAGIC_COMP_V1 ||
4851 v1->lmm_magic == LOV_MAGIC_SEL) &&
4852 !(ah && ah->dah_append_stripes)) {
4853 comp_v1 = (struct lov_comp_md_v1 *)v1;
4854 comp_cnt = comp_v1->lcm_entry_count;
4857 mirror_cnt = comp_v1->lcm_mirror_count + 1;
4865 /* realloc default comp entries if necessary */
4866 rc = lod_def_striping_comp_resize(lds, comp_cnt);
4870 lds->lds_def_comp_cnt = comp_cnt;
4871 lds->lds_def_striping_is_composite = composite;
4872 lds->lds_def_mirror_cnt = mirror_cnt;
4874 for (i = 0; i < comp_cnt; i++) {
4875 struct lod_layout_component *lod_comp;
4878 lod_comp = &lds->lds_def_comp_entries[i];
4880 * reset lod_comp values, llc_stripes is always NULL in
4881 * the default striping template, llc_pool will be reset
4884 memset(lod_comp, 0, offsetof(typeof(*lod_comp), llc_pool));
4887 v1 = (struct lov_user_md *)((char *)comp_v1 +
4888 comp_v1->lcm_entries[i].lcme_offset);
4889 lod_comp->llc_extent =
4890 comp_v1->lcm_entries[i].lcme_extent;
4891 /* We only inherit certain flags from the layout */
4892 lod_comp->llc_flags =
4893 comp_v1->lcm_entries[i].lcme_flags &
4894 LCME_TEMPLATE_FLAGS;
4897 if (!lov_pattern_supported(v1->lmm_pattern) &&
4898 !(v1->lmm_pattern & LOV_PATTERN_F_RELEASED)) {
4899 lod_free_def_comp_entries(lds);
4903 CDEBUG(D_LAYOUT, DFID" stripe_count=%d stripe_size=%d stripe_offset=%d append_stripes=%d\n",
4904 PFID(lu_object_fid(&lo->ldo_obj.do_lu)),
4905 (int)v1->lmm_stripe_count, (int)v1->lmm_stripe_size,
4906 (int)v1->lmm_stripe_offset,
4907 ah ? ah->dah_append_stripes : 0);
4909 if (ah && ah->dah_append_stripes)
4910 lod_comp->llc_stripe_count = ah->dah_append_stripes;
4912 lod_comp->llc_stripe_count = v1->lmm_stripe_count;
4913 lod_comp->llc_stripe_size = v1->lmm_stripe_size;
4914 lod_comp->llc_stripe_offset = v1->lmm_stripe_offset;
4915 lod_comp->llc_pattern = v1->lmm_pattern;
4918 if (ah && ah->dah_append_pool && ah->dah_append_pool[0]) {
4919 pool = ah->dah_append_pool;
4920 } else if (v1->lmm_magic == LOV_USER_MAGIC_V3) {
4921 /* XXX: sanity check here */
4922 v3 = (struct lov_user_md_v3 *) v1;
4923 if (v3->lmm_pool_name[0] != '\0')
4924 pool = v3->lmm_pool_name;
4926 lod_set_def_pool(lds, i, pool);
4927 if (v1->lmm_magic == LOV_USER_MAGIC_SPECIFIC) {
4928 v3 = (struct lov_user_md_v3 *)v1;
4929 rc = lod_comp_copy_ost_lists(lod_comp, v3);
4932 } else if (lod_comp->llc_ostlist.op_array &&
4933 lod_comp->llc_ostlist.op_count) {
4934 for (j = 0; j < lod_comp->llc_ostlist.op_count; j++)
4935 lod_comp->llc_ostlist.op_array[j] = -1;
4936 lod_comp->llc_ostlist.op_count = 0;
4940 lds->lds_def_striping_set = 1;
4945 * Get default directory striping.
4947 * \param[in] env execution environment
4948 * \param[in] lo object
4949 * \param[out] lds default striping
4951 * \retval 0 on success
4952 * \retval negative if failed
4954 static int lod_get_default_lmv_striping(const struct lu_env *env,
4955 struct lod_object *lo,
4956 struct lod_default_striping *lds)
4958 struct lmv_user_md *lmu;
4961 lds->lds_dir_def_striping_set = 0;
4963 rc = lod_get_default_lmv_ea(env, lo);
4967 if (rc >= (int)sizeof(*lmu)) {
4968 struct lod_thread_info *info = lod_env_info(env);
4970 lmu = info->lti_ea_store;
4972 lds->lds_dir_def_stripe_count =
4973 le32_to_cpu(lmu->lum_stripe_count);
4974 lds->lds_dir_def_stripe_offset =
4975 le32_to_cpu(lmu->lum_stripe_offset);
4976 lds->lds_dir_def_hash_type =
4977 le32_to_cpu(lmu->lum_hash_type);
4978 lds->lds_dir_def_striping_set = 1;
4985 * Get default striping in the object.
4987 * Get object default striping and default directory striping.
4989 * \param[in] env execution environment
4990 * \param[in] lo object
4991 * \param[out] lds default striping
4993 * \retval 0 on success
4994 * \retval negative if failed
4996 static int lod_get_default_striping(const struct lu_env *env,
4997 struct lod_object *lo,
4998 struct lod_default_striping *lds)
5002 rc = lod_get_default_lov_striping(env, lo, lds, NULL);
5003 rc1 = lod_get_default_lmv_striping(env, lo, lds);
5004 if (rc == 0 && rc1 < 0)
5011 * Apply default striping on object.
5013 * If object striping pattern is not set, set to the one in default striping.
5014 * The default striping is from parent or fs.
5016 * \param[in] lo new object
5017 * \param[in] lds default striping
5018 * \param[in] mode new object's mode
5020 static void lod_striping_from_default(struct lod_object *lo,
5021 const struct lod_default_striping *lds,
5024 struct lod_device *d = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
5027 if (lds->lds_def_striping_set && S_ISREG(mode)) {
5028 struct lov_desc *desc = &d->lod_ost_descs.ltd_lov_desc;
5030 rc = lod_alloc_comp_entries(lo, lds->lds_def_mirror_cnt,
5031 lds->lds_def_comp_cnt);
5035 lo->ldo_is_composite = lds->lds_def_striping_is_composite;
5036 if (lds->lds_def_mirror_cnt > 1)
5037 lo->ldo_flr_state = LCM_FL_RDONLY;
5039 for (i = 0; i < lo->ldo_comp_cnt; i++) {
5040 struct lod_layout_component *obj_comp =
5041 &lo->ldo_comp_entries[i];
5042 struct lod_layout_component *def_comp =
5043 &lds->lds_def_comp_entries[i];
5045 CDEBUG(D_LAYOUT, "Inherit from default: flags=%#x "
5046 "size=%hu nr=%u offset=%u pattern=%#x pool=%s\n",
5047 def_comp->llc_flags,
5048 def_comp->llc_stripe_size,
5049 def_comp->llc_stripe_count,
5050 def_comp->llc_stripe_offset,
5051 def_comp->llc_pattern,
5052 def_comp->llc_pool ?: "");
5054 *obj_comp = *def_comp;
5055 if (def_comp->llc_pool != NULL) {
5056 /* pointer was copied from def_comp */
5057 obj_comp->llc_pool = NULL;
5058 lod_obj_set_pool(lo, i, def_comp->llc_pool);
5062 if (def_comp->llc_ostlist.op_array &&
5063 def_comp->llc_ostlist.op_count) {
5064 OBD_ALLOC(obj_comp->llc_ostlist.op_array,
5065 obj_comp->llc_ostlist.op_size);
5066 if (!obj_comp->llc_ostlist.op_array)
5068 memcpy(obj_comp->llc_ostlist.op_array,
5069 def_comp->llc_ostlist.op_array,
5070 obj_comp->llc_ostlist.op_size);
5071 } else if (def_comp->llc_ostlist.op_array) {
5072 obj_comp->llc_ostlist.op_array = NULL;
5076 * Don't initialize these fields for plain layout
5077 * (v1/v3) here, they are inherited in the order of
5078 * 'parent' -> 'fs default (root)' -> 'global default
5079 * values for stripe_count & stripe_size'.
5081 * see lod_ah_init().
5083 if (!lo->ldo_is_composite)
5086 lod_adjust_stripe_info(obj_comp, desc, 0);
5088 } else if (lds->lds_dir_def_striping_set && S_ISDIR(mode)) {
5089 if (lo->ldo_dir_stripe_count == 0)
5090 lo->ldo_dir_stripe_count =
5091 lds->lds_dir_def_stripe_count;
5092 if (lo->ldo_dir_stripe_offset == -1)
5093 lo->ldo_dir_stripe_offset =
5094 lds->lds_dir_def_stripe_offset;
5095 if (lo->ldo_dir_hash_type == 0)
5096 lo->ldo_dir_hash_type = lds->lds_dir_def_hash_type;
5098 CDEBUG(D_LAYOUT, "striping from default dir: count:%hu, "
5099 "offset:%u, hash_type:%u\n",
5100 lo->ldo_dir_stripe_count, lo->ldo_dir_stripe_offset,
5101 lo->ldo_dir_hash_type);
5105 static inline bool lod_need_inherit_more(struct lod_object *lo, bool from_root,
5108 struct lod_layout_component *lod_comp;
5110 if (lo->ldo_comp_cnt == 0)
5113 if (lo->ldo_is_composite)
5116 lod_comp = &lo->ldo_comp_entries[0];
5118 if (lod_comp->llc_stripe_count <= 0 ||
5119 lod_comp->llc_stripe_size <= 0)
5122 if (from_root && (lod_comp->llc_pool == NULL ||
5123 lod_comp->llc_stripe_offset == LOV_OFFSET_DEFAULT))
5126 if (append_pool && append_pool[0])
5133 * Implementation of dt_object_operations::do_ah_init.
5135 * This method is used to make a decision on the striping configuration for the
5136 * object being created. It can be taken from the \a parent object if it exists,
5137 * or filesystem's default. The resulting configuration (number of stripes,
5138 * stripe size/offset, pool name, etc) is stored in the object itself and will
5139 * be used by the methods like ->doo_declare_create().
5141 * \see dt_object_operations::do_ah_init() in the API description for details.
5143 static void lod_ah_init(const struct lu_env *env,
5144 struct dt_allocation_hint *ah,
5145 struct dt_object *parent,
5146 struct dt_object *child,
5149 struct lod_device *d = lu2lod_dev(child->do_lu.lo_dev);
5150 struct lod_thread_info *info = lod_env_info(env);
5151 struct lod_default_striping *lds = lod_lds_buf_get(env);
5152 struct dt_object *nextp = NULL;
5153 struct dt_object *nextc;
5154 struct lod_object *lp = NULL;
5155 struct lod_object *lc;
5156 struct lov_desc *desc;
5157 struct lod_layout_component *lod_comp;
5163 if (ah->dah_append_stripes == -1)
5164 ah->dah_append_stripes =
5165 d->lod_ost_descs.ltd_lov_desc.ld_tgt_count;
5167 if (likely(parent)) {
5168 nextp = dt_object_child(parent);
5169 lp = lod_dt_obj(parent);
5172 nextc = dt_object_child(child);
5173 lc = lod_dt_obj(child);
5175 LASSERT(!lod_obj_is_striped(child));
5176 /* default layout template may have been set on the regular file
5177 * when this is called from mdd_create_data() */
5178 if (S_ISREG(child_mode))
5179 lod_free_comp_entries(lc);
5181 if (!dt_object_exists(nextc))
5182 nextc->do_ops->do_ah_init(env, ah, nextp, nextc, child_mode);
5184 if (S_ISDIR(child_mode)) {
5185 const struct lmv_user_md_v1 *lum1 = ah->dah_eadata;
5187 /* other default values are 0 */
5188 lc->ldo_dir_stripe_offset = -1;
5190 /* no default striping configuration is needed for
5193 if (ah->dah_eadata != NULL && ah->dah_eadata_len != 0 &&
5194 le32_to_cpu(lum1->lum_magic) == LMV_MAGIC_FOREIGN) {
5195 lc->ldo_dir_is_foreign = true;
5196 /* keep stripe_count 0 and stripe_offset -1 */
5197 CDEBUG(D_INFO, "no default striping for foreign dir\n");
5202 * If parent object is not root directory,
5203 * then get default striping from parent object.
5205 if (likely(lp != NULL)) {
5206 lod_get_default_striping(env, lp, lds);
5208 /* inherit default striping except ROOT */
5209 if ((lds->lds_def_striping_set ||
5210 lds->lds_dir_def_striping_set) &&
5211 !fid_is_root(lod_object_fid(lp)))
5212 lc->ldo_def_striping = lds;
5215 /* It should always honour the specified stripes */
5216 /* Note: old client (< 2.7)might also do lfs mkdir, whose EA
5217 * will have old magic. In this case, we should ignore the
5218 * stripe count and try to create dir by default stripe.
5220 if (ah->dah_eadata != NULL && ah->dah_eadata_len != 0 &&
5221 (le32_to_cpu(lum1->lum_magic) == LMV_USER_MAGIC ||
5222 le32_to_cpu(lum1->lum_magic) == LMV_USER_MAGIC_SPECIFIC)) {
5223 lc->ldo_dir_stripe_count =
5224 le32_to_cpu(lum1->lum_stripe_count);
5225 lc->ldo_dir_stripe_offset =
5226 le32_to_cpu(lum1->lum_stripe_offset);
5227 lc->ldo_dir_hash_type =
5228 le32_to_cpu(lum1->lum_hash_type);
5230 "set dirstripe: count %hu, offset %d, hash %u\n",
5231 lc->ldo_dir_stripe_count,
5232 (int)lc->ldo_dir_stripe_offset,
5233 lc->ldo_dir_hash_type);
5235 /* transfer defaults LMV to new directory */
5236 lod_striping_from_default(lc, lds, child_mode);
5238 /* set count 0 to create normal directory */
5239 if (lc->ldo_dir_stripe_count == 1)
5240 lc->ldo_dir_stripe_count = 0;
5243 /* shrink the stripe_count to the avaible MDT count */
5244 if (lc->ldo_dir_stripe_count > d->lod_remote_mdt_count + 1 &&
5245 !OBD_FAIL_CHECK(OBD_FAIL_LARGE_STRIPE)) {
5246 lc->ldo_dir_stripe_count = d->lod_remote_mdt_count + 1;
5247 if (lc->ldo_dir_stripe_count == 1)
5248 lc->ldo_dir_stripe_count = 0;
5251 if (!(lc->ldo_dir_hash_type & LMV_HASH_TYPE_MASK))
5252 lc->ldo_dir_hash_type |=
5253 d->lod_mdt_descs.ltd_lmv_desc.ld_pattern;
5255 CDEBUG(D_INFO, "final dir stripe [%hu %d %u]\n",
5256 lc->ldo_dir_stripe_count,
5257 (int)lc->ldo_dir_stripe_offset, lc->ldo_dir_hash_type);
5262 /* child object regular file*/
5264 if (!lod_object_will_be_striped(S_ISREG(child_mode),
5265 lu_object_fid(&child->do_lu)))
5268 /* If object is going to be striped over OSTs, transfer default
5269 * striping information to the child, so that we can use it
5270 * during declaration and creation.
5272 * Try from the parent first.
5274 if (likely(lp != NULL)) {
5275 rc = lod_get_default_lov_striping(env, lp, lds, ah);
5277 lod_striping_from_default(lc, lds, child_mode);
5280 /* Initialize lod_device::lod_md_root object reference */
5281 if (d->lod_md_root == NULL) {
5282 struct dt_object *root;
5283 struct lod_object *lroot;
5285 lu_root_fid(&info->lti_fid);
5286 root = dt_locate(env, &d->lod_dt_dev, &info->lti_fid);
5287 if (!IS_ERR(root)) {
5288 lroot = lod_dt_obj(root);
5290 spin_lock(&d->lod_lock);
5291 if (d->lod_md_root != NULL)
5292 dt_object_put(env, &d->lod_md_root->ldo_obj);
5293 d->lod_md_root = lroot;
5294 spin_unlock(&d->lod_lock);
5298 /* try inherit layout from the root object (fs default) when:
5299 * - parent does not have default layout; or
5300 * - parent has plain(v1/v3) default layout, and some attributes
5301 * are not specified in the default layout;
5303 if (d->lod_md_root != NULL &&
5304 lod_need_inherit_more(lc, true, ah->dah_append_pool)) {
5305 rc = lod_get_default_lov_striping(env, d->lod_md_root, lds,
5309 if (lc->ldo_comp_cnt == 0) {
5310 lod_striping_from_default(lc, lds, child_mode);
5311 } else if (!lds->lds_def_striping_is_composite) {
5312 struct lod_layout_component *def_comp;
5314 LASSERT(!lc->ldo_is_composite);
5315 lod_comp = &lc->ldo_comp_entries[0];
5316 def_comp = &lds->lds_def_comp_entries[0];
5318 if (lod_comp->llc_stripe_count <= 0)
5319 lod_comp->llc_stripe_count =
5320 def_comp->llc_stripe_count;
5321 if (lod_comp->llc_stripe_size <= 0)
5322 lod_comp->llc_stripe_size =
5323 def_comp->llc_stripe_size;
5324 if (lod_comp->llc_stripe_offset == LOV_OFFSET_DEFAULT &&
5325 (!lod_comp->llc_pool || !lod_comp->llc_pool[0]))
5326 lod_comp->llc_stripe_offset =
5327 def_comp->llc_stripe_offset;
5328 if (lod_comp->llc_pool == NULL)
5329 lod_obj_set_pool(lc, 0, def_comp->llc_pool);
5334 * fs default striping may not be explicitly set, or historically set
5335 * in config log, use them.
5337 if (lod_need_inherit_more(lc, false, ah->dah_append_pool)) {
5338 if (lc->ldo_comp_cnt == 0) {
5339 rc = lod_alloc_comp_entries(lc, 0, 1);
5341 /* fail to allocate memory, will create a
5342 * non-striped file. */
5344 lc->ldo_is_composite = 0;
5345 lod_comp = &lc->ldo_comp_entries[0];
5346 lod_comp->llc_stripe_offset = LOV_OFFSET_DEFAULT;
5348 LASSERT(!lc->ldo_is_composite);
5349 lod_comp = &lc->ldo_comp_entries[0];
5350 desc = &d->lod_ost_descs.ltd_lov_desc;
5351 lod_adjust_stripe_info(lod_comp, desc, ah->dah_append_stripes);
5352 if (ah->dah_append_pool && ah->dah_append_pool[0])
5353 lod_obj_set_pool(lc, 0, ah->dah_append_pool);
5360 * Size initialization on late striping.
5362 * Propagate the size of a truncated object to a deferred striping.
5363 * This function handles a special case when truncate was done on a
5364 * non-striped object and now while the striping is being created
5365 * we can't lose that size, so we have to propagate it to the stripes
5368 * \param[in] env execution environment
5369 * \param[in] dt object
5370 * \param[in] th transaction handle
5372 * \retval 0 on success
5373 * \retval negative if failed
5375 static int lod_declare_init_size(const struct lu_env *env,
5376 struct dt_object *dt, struct thandle *th)
5378 struct dt_object *next = dt_object_child(dt);
5379 struct lod_object *lo = lod_dt_obj(dt);
5380 struct dt_object **objects = NULL;
5381 struct lu_attr *attr = &lod_env_info(env)->lti_attr;
5382 uint64_t size, offs;
5383 int i, rc, stripe, stripe_count = 0, stripe_size = 0;
5384 struct lu_extent size_ext;
5387 if (!lod_obj_is_striped(dt))
5390 rc = dt_attr_get(env, next, attr);
5391 LASSERT(attr->la_valid & LA_SIZE);
5395 size = attr->la_size;
5399 size_ext = (typeof(size_ext)){ .e_start = size - 1, .e_end = size };
5400 for (i = 0; i < lo->ldo_comp_cnt; i++) {
5401 struct lod_layout_component *lod_comp;
5402 struct lu_extent *extent;
5404 lod_comp = &lo->ldo_comp_entries[i];
5406 if (lod_comp->llc_stripe == NULL)
5409 extent = &lod_comp->llc_extent;
5410 CDEBUG(D_INFO, "%lld "DEXT"\n", size, PEXT(extent));
5411 if (!lo->ldo_is_composite ||
5412 lu_extent_is_overlapped(extent, &size_ext)) {
5413 objects = lod_comp->llc_stripe;
5414 stripe_count = lod_comp->llc_stripe_count;
5415 stripe_size = lod_comp->llc_stripe_size;
5418 if (stripe_count == 0)
5421 LASSERT(objects != NULL && stripe_size != 0);
5422 do_div(size, stripe_size);
5423 stripe = do_div(size, stripe_count);
5424 LASSERT(objects[stripe] != NULL);
5426 size = size * stripe_size;
5427 offs = attr->la_size;
5428 size += do_div(offs, stripe_size);
5430 attr->la_valid = LA_SIZE;
5431 attr->la_size = size;
5433 rc = lod_sub_declare_attr_set(env, objects[stripe],
5442 * Declare creation of striped object.
5444 * The function declares creation stripes for a regular object. The function
5445 * also declares whether the stripes will be created with non-zero size if
5446 * previously size was set non-zero on the master object. If object \a dt is
5447 * not local, then only fully defined striping can be applied in \a lovea.
5448 * Otherwise \a lovea can be in the form of pattern, see lod_qos_parse_config()
5451 * \param[in] env execution environment
5452 * \param[in] dt object
5453 * \param[in] attr attributes the stripes will be created with
5454 * \param[in] lovea a buffer containing striping description
5455 * \param[in] th transaction handle
5457 * \retval 0 on success
5458 * \retval negative if failed
5460 int lod_declare_striped_create(const struct lu_env *env, struct dt_object *dt,
5461 struct lu_attr *attr,
5462 const struct lu_buf *lovea, struct thandle *th)
5464 struct lod_thread_info *info = lod_env_info(env);
5465 struct dt_object *next = dt_object_child(dt);
5466 struct lod_object *lo = lod_dt_obj(dt);
5470 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_ALLOC_OBDO))
5471 GOTO(out, rc = -ENOMEM);
5473 if (!dt_object_remote(next)) {
5474 /* choose OST and generate appropriate objects */
5475 rc = lod_prepare_create(env, lo, attr, lovea, th);
5480 * declare storage for striping data
5482 info->lti_buf.lb_len = lod_comp_md_size(lo, false);
5484 /* LOD can not choose OST objects for remote objects, i.e.
5485 * stripes must be ready before that. Right now, it can only
5486 * happen during migrate, i.e. migrate process needs to create
5487 * remote regular file (mdd_migrate_create), then the migrate
5488 * process will provide stripeEA. */
5489 LASSERT(lovea != NULL);
5490 info->lti_buf = *lovea;
5493 rc = lod_sub_declare_xattr_set(env, next, &info->lti_buf,
5494 XATTR_NAME_LOV, 0, th);
5499 * if striping is created with local object's size > 0,
5500 * we have to propagate this size to specific object
5501 * the case is possible only when local object was created previously
5503 if (dt_object_exists(next))
5504 rc = lod_declare_init_size(env, dt, th);
5507 /* failed to create striping or to set initial size, let's reset
5508 * config so that others don't get confused */
5510 lod_striping_free(env, lo);
5516 * Whether subdirectories under \a dt should be created on MDTs by space QoS
5518 * If LMV_HASH_FLAG_SPACE is set on directory default layout, its subdirectories
5519 * should be created on MDT by space QoS.
5521 * \param[in] env execution environment
5522 * \param[in] dev lu device
5523 * \param[in] dt object
5525 * \retval 1 if directory should create subdir by space usage
5527 * \retval -ev if failed
5529 static inline int dt_object_qos_mkdir(const struct lu_env *env,
5530 struct lu_device *dev,
5531 struct dt_object *dt)
5533 struct lod_thread_info *info = lod_env_info(env);
5534 struct lu_object *obj;
5535 struct lod_object *lo;
5536 struct lmv_user_md *lmu;
5539 obj = lu_object_find_slice(env, dev, lu_object_fid(&dt->do_lu), NULL);
5541 return PTR_ERR(obj);
5543 lo = lu2lod_obj(obj);
5545 rc = lod_get_default_lmv_ea(env, lo);
5546 dt_object_put(env, dt);
5550 if (rc < (int)sizeof(*lmu))
5553 lmu = info->lti_ea_store;
5554 return le32_to_cpu(lmu->lum_stripe_offset) == LMV_OFFSET_DEFAULT;
5558 * Implementation of dt_object_operations::do_declare_create.
5560 * The method declares creation of a new object. If the object will be striped,
5561 * then helper functions are called to find FIDs for the stripes, declare
5562 * creation of the stripes and declare initialization of the striping
5563 * information to be stored in the master object.
5565 * \see dt_object_operations::do_declare_create() in the API description
5568 static int lod_declare_create(const struct lu_env *env, struct dt_object *dt,
5569 struct lu_attr *attr,
5570 struct dt_allocation_hint *hint,
5571 struct dt_object_format *dof, struct thandle *th)
5573 struct dt_object *next = dt_object_child(dt);
5574 struct lod_object *lo = lod_dt_obj(dt);
5583 * first of all, we declare creation of local object
5585 rc = lod_sub_declare_create(env, next, attr, hint, dof, th);
5590 * it's lod_ah_init() that has decided the object will be striped
5592 if (dof->dof_type == DFT_REGULAR) {
5593 /* callers don't want stripes */
5594 /* XXX: all tricky interactions with ->ah_make_hint() decided
5595 * to use striping, then ->declare_create() behaving differently
5596 * should be cleaned */
5597 if (dof->u.dof_reg.striped != 0)
5598 rc = lod_declare_striped_create(env, dt, attr,
5600 } else if (dof->dof_type == DFT_DIR) {
5601 struct seq_server_site *ss;
5602 struct lu_buf buf = { NULL };
5603 struct lu_buf *lmu = NULL;
5605 ss = lu_site2seq(dt->do_lu.lo_dev->ld_site);
5607 /* If the parent has default stripeEA, and client
5608 * did not find it before sending create request,
5609 * then MDT will return -EREMOTE, and client will
5610 * retrieve the default stripeEA and re-create the
5613 * Note: if dah_eadata != NULL, it means creating the
5614 * striped directory with specified stripeEA, then it
5615 * should ignore the default stripeEA */
5616 if (hint != NULL && hint->dah_eadata == NULL) {
5617 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_STALE_DIR_LAYOUT))
5618 GOTO(out, rc = -EREMOTE);
5620 if (lo->ldo_dir_stripe_offset == LMV_OFFSET_DEFAULT) {
5621 struct lod_default_striping *lds;
5623 lds = lo->ldo_def_striping;
5625 * child and parent should be on the same MDT,
5626 * but if parent has default LMV, and the start
5627 * MDT offset is -1, it's allowed. This check
5628 * is not necessary after 2.12.22 because client
5629 * follows this already, but old client may not.
5631 if (hint->dah_parent &&
5632 dt_object_remote(hint->dah_parent) && lds &&
5633 lds->lds_dir_def_stripe_offset !=
5635 GOTO(out, rc = -EREMOTE);
5636 } else if (lo->ldo_dir_stripe_offset !=
5638 struct lod_device *lod;
5639 struct lu_tgt_desc *mdt = NULL;
5640 bool found_mdt = false;
5642 lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
5643 lod_foreach_mdt(lod, mdt) {
5644 if (mdt->ltd_index ==
5645 lo->ldo_dir_stripe_offset) {
5651 /* If the MDT indicated by stripe_offset can be
5652 * found, then tell client to resend the create
5653 * request to the correct MDT, otherwise return
5654 * error to client */
5656 GOTO(out, rc = -EREMOTE);
5658 GOTO(out, rc = -EINVAL);
5660 } else if (hint && hint->dah_eadata) {
5662 lmu->lb_buf = (void *)hint->dah_eadata;
5663 lmu->lb_len = hint->dah_eadata_len;
5666 rc = lod_declare_dir_striping_create(env, dt, attr, lmu, dof,
5670 /* failed to create striping or to set initial size, let's reset
5671 * config so that others don't get confused */
5673 lod_striping_free(env, lo);
5678 * Generate component ID for new created component.
5680 * \param[in] lo LOD object
5681 * \param[in] comp_idx index of ldo_comp_entries
5683 * \retval component ID on success
5684 * \retval LCME_ID_INVAL on failure
5686 static __u32 lod_gen_component_id(struct lod_object *lo,
5687 int mirror_id, int comp_idx)
5689 struct lod_layout_component *lod_comp;
5690 __u32 id, start, end;
5693 LASSERT(lo->ldo_comp_entries[comp_idx].llc_id == LCME_ID_INVAL);
5695 lod_obj_inc_layout_gen(lo);
5696 id = lo->ldo_layout_gen;
5697 if (likely(id <= SEQ_ID_MAX))
5698 RETURN(pflr_id(mirror_id, id & SEQ_ID_MASK));
5700 /* Layout generation wraps, need to check collisions. */
5701 start = id & SEQ_ID_MASK;
5704 for (id = start; id <= end; id++) {
5705 for (i = 0; i < lo->ldo_comp_cnt; i++) {
5706 lod_comp = &lo->ldo_comp_entries[i];
5707 if (pflr_id(mirror_id, id) == lod_comp->llc_id)
5710 /* Found the ununsed ID */
5711 if (i == lo->ldo_comp_cnt)
5712 RETURN(pflr_id(mirror_id, id));
5714 if (end == LCME_ID_MAX) {
5716 end = min(lo->ldo_layout_gen & LCME_ID_MASK,
5717 (__u32)(LCME_ID_MAX - 1));
5721 RETURN(LCME_ID_INVAL);
5725 * Creation of a striped regular object.
5727 * The function is called to create the stripe objects for a regular
5728 * striped file. This can happen at the initial object creation or
5729 * when the caller asks LOD to do so using ->do_xattr_set() method
5730 * (so called late striping). Notice all the information are already
5731 * prepared in the form of the list of objects (ldo_stripe field).
5732 * This is done during declare phase.
5734 * \param[in] env execution environment
5735 * \param[in] dt object
5736 * \param[in] attr attributes the stripes will be created with
5737 * \param[in] dof format of stripes (see OSD API description)
5738 * \param[in] th transaction handle
5740 * \retval 0 on success
5741 * \retval negative if failed
5743 int lod_striped_create(const struct lu_env *env, struct dt_object *dt,
5744 struct lu_attr *attr, struct dt_object_format *dof,
5747 struct lod_layout_component *lod_comp;
5748 struct lod_object *lo = lod_dt_obj(dt);
5753 LASSERT((lo->ldo_comp_cnt != 0 && lo->ldo_comp_entries != NULL) ||
5754 lo->ldo_is_foreign);
5756 mirror_id = 0; /* non-flr file's mirror_id is 0 */
5757 if (lo->ldo_mirror_count > 1) {
5758 for (i = 0; i < lo->ldo_comp_cnt; i++) {
5759 lod_comp = &lo->ldo_comp_entries[i];
5760 if (lod_comp->llc_id != LCME_ID_INVAL &&
5761 mirror_id_of(lod_comp->llc_id) > mirror_id)
5762 mirror_id = mirror_id_of(lod_comp->llc_id);
5766 /* create all underlying objects */
5767 for (i = 0; i < lo->ldo_comp_cnt; i++) {
5768 lod_comp = &lo->ldo_comp_entries[i];
5770 if (lod_comp->llc_id == LCME_ID_INVAL) {
5771 /* only the component of FLR layout with more than 1
5772 * mirror has mirror ID in its component ID.
5774 if (lod_comp->llc_extent.e_start == 0 &&
5775 lo->ldo_mirror_count > 1)
5778 lod_comp->llc_id = lod_gen_component_id(lo,
5780 if (lod_comp->llc_id == LCME_ID_INVAL)
5781 GOTO(out, rc = -ERANGE);
5784 if (lod_comp_inited(lod_comp))
5787 if (lod_comp->llc_pattern & LOV_PATTERN_F_RELEASED)
5788 lod_comp_set_init(lod_comp);
5790 if (lov_pattern(lod_comp->llc_pattern) == LOV_PATTERN_MDT)
5791 lod_comp_set_init(lod_comp);
5793 if (lod_comp->llc_stripe == NULL)
5796 LASSERT(lod_comp->llc_stripe_count);
5797 for (j = 0; j < lod_comp->llc_stripe_count; j++) {
5798 struct dt_object *object = lod_comp->llc_stripe[j];
5799 LASSERT(object != NULL);
5800 rc = lod_sub_create(env, object, attr, NULL, dof, th);
5804 lod_comp_set_init(lod_comp);
5807 rc = lod_fill_mirrors(lo);
5811 rc = lod_generate_and_set_lovea(env, lo, th);
5815 lo->ldo_comp_cached = 1;
5819 lod_striping_free(env, lo);
5823 static inline bool lod_obj_is_dom(struct dt_object *dt)
5825 struct lod_object *lo = lod_dt_obj(dt);
5827 if (!dt_object_exists(dt_object_child(dt)))
5830 if (S_ISDIR(dt->do_lu.lo_header->loh_attr))
5833 if (!lo->ldo_comp_cnt)
5836 return (lov_pattern(lo->ldo_comp_entries[0].llc_pattern) ==
5841 * Implementation of dt_object_operations::do_create.
5843 * If any of preceeding methods (like ->do_declare_create(),
5844 * ->do_ah_init(), etc) chose to create a striped object,
5845 * then this method will create the master and the stripes.
5847 * \see dt_object_operations::do_create() in the API description for details.
5849 static int lod_create(const struct lu_env *env, struct dt_object *dt,
5850 struct lu_attr *attr, struct dt_allocation_hint *hint,
5851 struct dt_object_format *dof, struct thandle *th)
5856 /* create local object */
5857 rc = lod_sub_create(env, dt_object_child(dt), attr, hint, dof, th);
5861 if (S_ISREG(dt->do_lu.lo_header->loh_attr) &&
5862 (lod_obj_is_striped(dt) || lod_obj_is_dom(dt)) &&
5863 dof->u.dof_reg.striped != 0) {
5864 LASSERT(lod_dt_obj(dt)->ldo_comp_cached == 0);
5865 rc = lod_striped_create(env, dt, attr, dof, th);
5872 lod_obj_stripe_destroy_cb(const struct lu_env *env, struct lod_object *lo,
5873 struct dt_object *dt, struct thandle *th,
5874 int comp_idx, int stripe_idx,
5875 struct lod_obj_stripe_cb_data *data)
5877 if (data->locd_declare)
5878 return lod_sub_declare_destroy(env, dt, th);
5879 else if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_SPEOBJ) ||
5880 stripe_idx == cfs_fail_val)
5881 return lod_sub_destroy(env, dt, th);
5887 * Implementation of dt_object_operations::do_declare_destroy.
5889 * If the object is a striped directory, then the function declares reference
5890 * removal from the master object (this is an index) to the stripes and declares
5891 * destroy of all the stripes. In all the cases, it declares an intention to
5892 * destroy the object itself.
5894 * \see dt_object_operations::do_declare_destroy() in the API description
5897 static int lod_declare_destroy(const struct lu_env *env, struct dt_object *dt,
5900 struct dt_object *next = dt_object_child(dt);
5901 struct lod_object *lo = lod_dt_obj(dt);
5902 struct lod_thread_info *info = lod_env_info(env);
5903 struct dt_object *stripe;
5904 char *stripe_name = info->lti_key;
5910 * load striping information, notice we don't do this when object
5911 * is being initialized as we don't need this information till
5912 * few specific cases like destroy, chown
5914 rc = lod_striping_load(env, lo);
5918 /* declare destroy for all underlying objects */
5919 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
5920 rc = next->do_ops->do_index_try(env, next,
5921 &dt_directory_features);
5925 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
5926 stripe = lo->ldo_stripe[i];
5930 rc = lod_sub_declare_ref_del(env, next, th);
5934 snprintf(stripe_name, sizeof(info->lti_key),
5936 PFID(lu_object_fid(&stripe->do_lu)), i);
5937 rc = lod_sub_declare_delete(env, next,
5938 (const struct dt_key *)stripe_name, th);
5945 * we declare destroy for the local object
5947 rc = lod_sub_declare_destroy(env, next, th);
5951 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ) ||
5952 OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
5955 if (!lod_obj_is_striped(dt))
5958 /* declare destroy all striped objects */
5959 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
5960 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
5961 stripe = lo->ldo_stripe[i];
5965 if (!dt_object_exists(stripe))
5968 rc = lod_sub_declare_ref_del(env, stripe, th);
5972 rc = lod_sub_declare_destroy(env, stripe, th);
5977 struct lod_obj_stripe_cb_data data = { { 0 } };
5979 data.locd_declare = true;
5980 data.locd_stripe_cb = lod_obj_stripe_destroy_cb;
5981 rc = lod_obj_for_each_stripe(env, lo, th, &data);
5988 * Implementation of dt_object_operations::do_destroy.
5990 * If the object is a striped directory, then the function removes references
5991 * from the master object (this is an index) to the stripes and destroys all
5992 * the stripes. In all the cases, the function destroys the object itself.
5994 * \see dt_object_operations::do_destroy() in the API description for details.
5996 static int lod_destroy(const struct lu_env *env, struct dt_object *dt,
5999 struct dt_object *next = dt_object_child(dt);
6000 struct lod_object *lo = lod_dt_obj(dt);
6001 struct lod_thread_info *info = lod_env_info(env);
6002 char *stripe_name = info->lti_key;
6003 struct dt_object *stripe;
6009 /* destroy sub-stripe of master object */
6010 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
6011 rc = next->do_ops->do_index_try(env, next,
6012 &dt_directory_features);
6016 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
6017 stripe = lo->ldo_stripe[i];
6021 rc = lod_sub_ref_del(env, next, th);
6025 snprintf(stripe_name, sizeof(info->lti_key), DFID":%d",
6026 PFID(lu_object_fid(&stripe->do_lu)), i);
6028 CDEBUG(D_INFO, DFID" delete stripe %s "DFID"\n",
6029 PFID(lu_object_fid(&dt->do_lu)), stripe_name,
6030 PFID(lu_object_fid(&stripe->do_lu)));
6032 rc = lod_sub_delete(env, next,
6033 (const struct dt_key *)stripe_name, th);
6039 rc = lod_sub_destroy(env, next, th);
6043 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ) ||
6044 OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
6047 if (!lod_obj_is_striped(dt))
6050 /* destroy all striped objects */
6051 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
6052 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
6053 stripe = lo->ldo_stripe[i];
6057 if (!dt_object_exists(stripe))
6060 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_SPEOBJ) ||
6061 i == cfs_fail_val) {
6062 dt_write_lock(env, stripe, DT_TGT_CHILD);
6063 rc = lod_sub_ref_del(env, stripe, th);
6064 dt_write_unlock(env, stripe);
6068 rc = lod_sub_destroy(env, stripe, th);
6074 struct lod_obj_stripe_cb_data data = { { 0 } };
6076 data.locd_declare = false;
6077 data.locd_stripe_cb = lod_obj_stripe_destroy_cb;
6078 rc = lod_obj_for_each_stripe(env, lo, th, &data);
6085 * Implementation of dt_object_operations::do_declare_ref_add.
6087 * \see dt_object_operations::do_declare_ref_add() in the API description
6090 static int lod_declare_ref_add(const struct lu_env *env,
6091 struct dt_object *dt, struct thandle *th)
6093 return lod_sub_declare_ref_add(env, dt_object_child(dt), th);
6097 * Implementation of dt_object_operations::do_ref_add.
6099 * \see dt_object_operations::do_ref_add() in the API description for details.
6101 static int lod_ref_add(const struct lu_env *env,
6102 struct dt_object *dt, struct thandle *th)
6104 return lod_sub_ref_add(env, dt_object_child(dt), th);
6108 * Implementation of dt_object_operations::do_declare_ref_del.
6110 * \see dt_object_operations::do_declare_ref_del() in the API description
6113 static int lod_declare_ref_del(const struct lu_env *env,
6114 struct dt_object *dt, struct thandle *th)
6116 return lod_sub_declare_ref_del(env, dt_object_child(dt), th);
6120 * Implementation of dt_object_operations::do_ref_del
6122 * \see dt_object_operations::do_ref_del() in the API description for details.
6124 static int lod_ref_del(const struct lu_env *env,
6125 struct dt_object *dt, struct thandle *th)
6127 return lod_sub_ref_del(env, dt_object_child(dt), th);
6131 * Implementation of dt_object_operations::do_object_sync.
6133 * \see dt_object_operations::do_object_sync() in the API description
6136 static int lod_object_sync(const struct lu_env *env, struct dt_object *dt,
6137 __u64 start, __u64 end)
6139 return dt_object_sync(env, dt_object_child(dt), start, end);
6143 * Implementation of dt_object_operations::do_object_unlock.
6145 * Used to release LDLM lock(s).
6147 * \see dt_object_operations::do_object_unlock() in the API description
6150 static int lod_object_unlock(const struct lu_env *env, struct dt_object *dt,
6151 struct ldlm_enqueue_info *einfo,
6152 union ldlm_policy_data *policy)
6154 struct lod_object *lo = lod_dt_obj(dt);
6155 struct lustre_handle_array *slave_locks = einfo->ei_cbdata;
6156 int slave_locks_size;
6160 if (slave_locks == NULL)
6163 LASSERT(S_ISDIR(dt->do_lu.lo_header->loh_attr));
6164 /* Note: for remote lock for single stripe dir, MDT will cancel
6165 * the lock by lockh directly */
6166 LASSERT(!dt_object_remote(dt_object_child(dt)));
6168 /* locks were unlocked in MDT layer */
6169 for (i = 0; i < slave_locks->ha_count; i++)
6170 LASSERT(!lustre_handle_is_used(&slave_locks->ha_handles[i]));
6173 * NB, ha_count may not equal to ldo_dir_stripe_count, because dir
6174 * layout may change, e.g., shrink dir layout after migration.
6176 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
6177 if (lo->ldo_stripe[i])
6178 dt_invalidate(env, lo->ldo_stripe[i]);
6181 slave_locks_size = offsetof(typeof(*slave_locks),
6182 ha_handles[slave_locks->ha_count]);
6183 OBD_FREE(slave_locks, slave_locks_size);
6184 einfo->ei_cbdata = NULL;
6190 * Implementation of dt_object_operations::do_object_lock.
6192 * Used to get LDLM lock on the non-striped and striped objects.
6194 * \see dt_object_operations::do_object_lock() in the API description
6197 static int lod_object_lock(const struct lu_env *env,
6198 struct dt_object *dt,
6199 struct lustre_handle *lh,
6200 struct ldlm_enqueue_info *einfo,
6201 union ldlm_policy_data *policy)
6203 struct lod_object *lo = lod_dt_obj(dt);
6204 int slave_locks_size;
6205 struct lustre_handle_array *slave_locks = NULL;
6210 /* remote object lock */
6211 if (!einfo->ei_enq_slave) {
6212 LASSERT(dt_object_remote(dt));
6213 return dt_object_lock(env, dt_object_child(dt), lh, einfo,
6217 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr))
6220 rc = lod_striping_load(env, lo);
6225 if (lo->ldo_dir_stripe_count <= 1)
6228 slave_locks_size = offsetof(typeof(*slave_locks),
6229 ha_handles[lo->ldo_dir_stripe_count]);
6230 /* Freed in lod_object_unlock */
6231 OBD_ALLOC(slave_locks, slave_locks_size);
6234 slave_locks->ha_count = lo->ldo_dir_stripe_count;
6236 /* striped directory lock */
6237 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
6238 struct lustre_handle lockh;
6239 struct ldlm_res_id *res_id;
6240 struct dt_object *stripe;
6242 stripe = lo->ldo_stripe[i];
6246 res_id = &lod_env_info(env)->lti_res_id;
6247 fid_build_reg_res_name(lu_object_fid(&stripe->do_lu), res_id);
6248 einfo->ei_res_id = res_id;
6250 if (dt_object_remote(stripe)) {
6251 set_bit(i, (void *)slave_locks->ha_map);
6252 rc = dt_object_lock(env, stripe, &lockh, einfo, policy);
6254 struct ldlm_namespace *ns = einfo->ei_namespace;
6255 ldlm_blocking_callback blocking = einfo->ei_cb_local_bl;
6256 ldlm_completion_callback completion = einfo->ei_cb_cp;
6257 __u64 dlmflags = LDLM_FL_ATOMIC_CB;
6259 if (einfo->ei_mode == LCK_PW ||
6260 einfo->ei_mode == LCK_EX)
6261 dlmflags |= LDLM_FL_COS_INCOMPAT;
6263 LASSERT(ns != NULL);
6264 rc = ldlm_cli_enqueue_local(env, ns, res_id, LDLM_IBITS,
6265 policy, einfo->ei_mode,
6266 &dlmflags, blocking,
6268 NULL, 0, LVB_T_NONE,
6273 ldlm_lock_decref_and_cancel(
6274 &slave_locks->ha_handles[i],
6276 OBD_FREE(slave_locks, slave_locks_size);
6279 slave_locks->ha_handles[i] = lockh;
6281 einfo->ei_cbdata = slave_locks;
6287 * Implementation of dt_object_operations::do_invalidate.
6289 * \see dt_object_operations::do_invalidate() in the API description for details
6291 static int lod_invalidate(const struct lu_env *env, struct dt_object *dt)
6293 return dt_invalidate(env, dt_object_child(dt));
6296 static int lod_declare_instantiate_components(const struct lu_env *env,
6297 struct lod_object *lo, struct thandle *th)
6299 struct lod_thread_info *info = lod_env_info(env);
6304 LASSERT(info->lti_count < lo->ldo_comp_cnt);
6306 for (i = 0; i < info->lti_count; i++) {
6307 rc = lod_qos_prep_create(env, lo, NULL, th,
6308 info->lti_comp_idx[i]);
6314 info->lti_buf.lb_len = lod_comp_md_size(lo, false);
6315 rc = lod_sub_declare_xattr_set(env, lod_object_child(lo),
6316 &info->lti_buf, XATTR_NAME_LOV, 0, th);
6323 * Check OSTs for an existing component for further extension
6325 * Checks if OSTs are still healthy and not out of space. Gets free space
6326 * on OSTs (relative to allocation watermark rmb_low) and compares to
6327 * the proposed new_end for this component.
6329 * Decides whether or not to extend a component on its current OSTs.
6331 * \param[in] env execution environment for this thread
6332 * \param[in] lo object we're checking
6333 * \param[in] index index of this component
6334 * \param[in] extension_size extension size for this component
6335 * \param[in] extent layout extent for requested operation
6336 * \param[in] comp_extent extension component extent
6337 * \param[in] write if this is write operation
6339 * \retval true - OK to extend on current OSTs
6340 * \retval false - do not extend on current OSTs
6342 static bool lod_sel_osts_allowed(const struct lu_env *env,
6343 struct lod_object *lo,
6344 int index, __u64 extension_size,
6345 struct lu_extent *extent,
6346 struct lu_extent *comp_extent, int write)
6348 struct lod_layout_component *lod_comp = &lo->ldo_comp_entries[index];
6349 struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
6350 struct obd_statfs *sfs = &lod_env_info(env)->lti_osfs;
6351 __u64 available = 0;
6358 LASSERT(lod_comp->llc_stripe_count != 0);
6361 (extent->e_start == 0 && extent->e_end == OBD_OBJECT_EOF)) {
6362 /* truncate or append */
6363 size = extension_size;
6365 /* In case of write op, check the real write extent,
6366 * it may be larger than the extension_size */
6367 size = roundup(min(extent->e_end, comp_extent->e_end) -
6368 max(extent->e_start, comp_extent->e_start),
6371 /* extension_size is file level, so we must divide by stripe count to
6372 * compare it to available space on a single OST */
6373 size /= lod_comp->llc_stripe_count;
6375 lod_getref(&lod->lod_ost_descs);
6376 for (i = 0; i < lod_comp->llc_stripe_count; i++) {
6377 int index = lod_comp->llc_ost_indices[i];
6378 struct lod_tgt_desc *ost = OST_TGT(lod, index);
6379 struct obd_statfs_info info = { 0 };
6380 int j, repeated = 0;
6384 /* Get the number of times this OST repeats in this component.
6385 * Note: inter-component repeats are not counted as this is
6386 * considered as a rare case: we try to not repeat OST in other
6387 * components if possible. */
6388 for (j = 0; j < lod_comp->llc_stripe_count; j++) {
6389 if (index != lod_comp->llc_ost_indices[j])
6392 /* already handled */
6398 if (j < lod_comp->llc_stripe_count)
6401 if (!cfs_bitmap_check(lod->lod_ost_bitmap, index)) {
6402 CDEBUG(D_LAYOUT, "ost %d no longer present\n", index);
6407 rc = dt_statfs_info(env, ost->ltd_tgt, sfs, &info);
6409 CDEBUG(D_LAYOUT, "statfs failed for ost %d, error %d\n",
6415 if (sfs->os_state & OS_STATE_ENOSPC ||
6416 sfs->os_state & OS_STATE_READONLY ||
6417 sfs->os_state & OS_STATE_DEGRADED) {
6418 CDEBUG(D_LAYOUT, "ost %d is not availble for SEL "
6419 "extension, state %u\n", index, sfs->os_state);
6425 available = sfs->os_bavail * sfs->os_bsize;
6426 /* 'available' is relative to the allocation threshold */
6427 available -= (__u64) info.os_reserved_mb_low << 20;
6429 CDEBUG(D_LAYOUT, "ost %d lowwm: %d highwm: %d, "
6430 "%llu %% blocks available, %llu %% blocks free\n",
6431 index, info.os_reserved_mb_low, info.os_reserved_mb_high,
6432 (100ull * sfs->os_bavail) / sfs->os_blocks,
6433 (100ull * sfs->os_bfree) / sfs->os_blocks);
6435 if (size * repeated > available) {
6437 CDEBUG(D_LAYOUT, "low space on ost %d, available %llu "
6438 "< extension size %llu\n", index, available,
6443 lod_putref(lod, &lod->lod_ost_descs);
6449 * Adjust extents after component removal
6451 * When we remove an extension component, we move the start of the next
6452 * component to match the start of the extension component, so no space is left
6455 * \param[in] env execution environment for this thread
6456 * \param[in] lo object
6457 * \param[in] max_comp layout component
6458 * \param[in] index index of this component
6460 * \retval 0 on success
6461 * \retval negative errno on error
6463 static void lod_sel_adjust_extents(const struct lu_env *env,
6464 struct lod_object *lo,
6465 int max_comp, int index)
6467 struct lod_layout_component *lod_comp = NULL;
6468 struct lod_layout_component *next = NULL;
6469 struct lod_layout_component *prev = NULL;
6470 __u64 new_start = 0;
6474 /* Extension space component */
6475 lod_comp = &lo->ldo_comp_entries[index];
6476 next = &lo->ldo_comp_entries[index + 1];
6477 prev = &lo->ldo_comp_entries[index - 1];
6479 LASSERT(lod_comp != NULL && prev != NULL && next != NULL);
6480 LASSERT(lod_comp->llc_flags & LCME_FL_EXTENSION);
6482 /* Previous is being removed */
6483 if (prev && prev->llc_id == LCME_ID_INVAL)
6484 new_start = prev->llc_extent.e_start;
6486 new_start = lod_comp->llc_extent.e_start;
6488 for (i = index + 1; i < max_comp; i++) {
6489 lod_comp = &lo->ldo_comp_entries[i];
6491 start = lod_comp->llc_extent.e_start;
6492 lod_comp->llc_extent.e_start = new_start;
6494 /* We only move zero length extendable components */
6495 if (!(start == lod_comp->llc_extent.e_end))
6498 LASSERT(!(lod_comp->llc_flags & LCME_FL_INIT));
6500 lod_comp->llc_extent.e_end = new_start;
6504 /* Calculate the proposed 'new end' for a component we're extending */
6505 static __u64 lod_extension_new_end(__u64 extension_size, __u64 extent_end,
6506 __u32 stripe_size, __u64 component_end,
6507 __u64 extension_end)
6511 LASSERT(extension_size != 0 && stripe_size != 0);
6513 /* Round up to extension size */
6514 if (extent_end == OBD_OBJECT_EOF) {
6515 new_end = OBD_OBJECT_EOF;
6517 /* Add at least extension_size to the previous component_end,
6518 * covering the req layout extent */
6519 new_end = max(extent_end - component_end, extension_size);
6520 new_end = roundup(new_end, extension_size);
6521 new_end += component_end;
6523 /* Component end must be min stripe size aligned */
6524 if (new_end % stripe_size) {
6525 CDEBUG(D_LAYOUT, "new component end is not aligned "
6526 "by the stripe size %u: [%llu, %llu) ext size "
6527 "%llu new end %llu, aligning\n",
6528 stripe_size, component_end, extent_end,
6529 extension_size, new_end);
6530 new_end = roundup(new_end, stripe_size);
6534 if (new_end < extent_end)
6535 new_end = OBD_OBJECT_EOF;
6538 /* Don't extend past the end of the extension component */
6539 if (new_end > extension_end)
6540 new_end = extension_end;
6545 /* As lod_sel_handler() could be re-entered for the same component several
6546 * times, this is the data for the next call. Fields could be changed to
6547 * component indexes when needed, (e.g. if there is no need to instantiate
6548 * all the previous components up to the current position) to tell the caller
6549 * where to start over from. */
6556 * Process extent updates for a particular layout component
6558 * Handle layout updates for a particular extension space component touched by
6559 * a layout update operation. Core function of self-extending PFL feature.
6561 * In general, this function processes exactly *one* stage of an extension
6562 * operation, modifying the layout accordingly, then returns to the caller.
6563 * The caller is responsible for restarting processing with the new layout,
6564 * which may repeatedly return to this function until the extension updates
6567 * This function does one of a few things to the layout:
6568 * 1. Extends the component before the current extension space component to
6569 * allow it to accomodate the requested operation (if space/policy permit that
6570 * component to continue on its current OSTs)
6572 * 2. If extension of the existing component fails, we do one of two things:
6573 * a. If there is a component after the extension space, we remove the
6574 * extension space component, move the start of the next component down
6575 * accordingly, then notify the caller to restart processing w/the new
6577 * b. If there is no following component, we try repeating the current
6578 * component, creating a new component using the current one as a
6579 * template (keeping its stripe properties but not specific striping),
6580 * and try assigning striping for this component. If there is sufficient
6581 * free space on the OSTs chosen for this component, it is instantiated
6582 * and i/o continues there.
6584 * If there is not sufficient space on the new OSTs, we remove this new
6585 * component & extend the current component.
6587 * Note further that uninited components followed by extension space can be zero
6588 * length meaning that we will try to extend them before initializing them, and
6589 * if that fails, they will be removed without initialization.
6591 * 3. If we extend to/beyond the end of an extension space component, that
6592 * component is exhausted (all of its range has been given to real components),
6593 * so we remove it and restart processing.
6595 * \param[in] env execution environment for this thread
6596 * \param[in,out] lo object to update the layout of
6597 * \param[in] extent layout extent for requested operation, update
6598 * layout to fit this operation
6599 * \param[in] th transaction handle for this operation
6600 * \param[in,out] max_comp the highest comp for the portion of the layout
6601 * we are operating on (For FLR, the chosen
6602 * replica). Updated because we may remove
6604 * \param[in] index index of the extension space component we're
6606 * \param[in] write if this is write op
6607 * \param[in,out] force if the extension is to be forced; set here
6608 to force it on the 2nd call for the same
6611 * \retval 0 on success
6612 * \retval negative errno on error
6614 static int lod_sel_handler(const struct lu_env *env,
6615 struct lod_object *lo,
6616 struct lu_extent *extent,
6617 struct thandle *th, int *max_comp,
6618 int index, int write,
6619 struct sel_data *sd)
6621 struct lod_device *d = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
6622 struct lod_thread_info *info = lod_env_info(env);
6623 struct lod_layout_component *lod_comp;
6624 struct lod_layout_component *prev;
6625 struct lod_layout_component *next = NULL;
6626 __u64 extension_size;
6633 /* First component cannot be extension space */
6635 CERROR("%s: "DFID" first component cannot be extension space\n",
6636 lod2obd(d)->obd_name, PFID(lod_object_fid(lo)));
6640 lod_comp = &lo->ldo_comp_entries[index];
6641 prev = &lo->ldo_comp_entries[index - 1];
6642 if ((index + 1) < *max_comp)
6643 next = &lo->ldo_comp_entries[index + 1];
6645 /* extension size uses the stripe size field as KiB */
6646 extension_size = lod_comp->llc_stripe_size * SEL_UNIT_SIZE;
6648 CDEBUG(D_LAYOUT, "prev start %llu, extension start %llu, extension end"
6649 " %llu, extension size %llu\n", prev->llc_extent.e_start,
6650 lod_comp->llc_extent.e_start, lod_comp->llc_extent.e_end,
6653 /* Two extension space components cannot be adjacent & extension space
6654 * components cannot be init */
6655 if ((prev->llc_flags & LCME_FL_EXTENSION) ||
6656 !(ergo(next, !(next->llc_flags & LCME_FL_EXTENSION))) ||
6657 lod_comp_inited(lod_comp)) {
6658 CERROR("%s: "DFID" invalid extension space components\n",
6659 lod2obd(d)->obd_name, PFID(lod_object_fid(lo)));
6663 if (!prev->llc_stripe) {
6664 CDEBUG(D_LAYOUT, "Previous component not inited\n");
6665 info->lti_count = 1;
6666 info->lti_comp_idx[0] = index - 1;
6667 rc = lod_declare_instantiate_components(env, lo, th);
6668 /* ENOSPC tells us we can't use this component. If there is
6669 * a next or we are repeating, we either spill over (next) or
6670 * extend the original comp (repeat). Otherwise, return the
6671 * error to the user. */
6672 if (rc == -ENOSPC && (next || sd->sd_repeat))
6678 if (sd->sd_force == 0 && rc == 0)
6679 rc = !lod_sel_osts_allowed(env, lo, index - 1,
6680 extension_size, extent,
6681 &lod_comp->llc_extent, write);
6683 repeated = !!(sd->sd_repeat);
6687 /* Extend previous component */
6689 new_end = lod_extension_new_end(extension_size, extent->e_end,
6690 prev->llc_stripe_size,
6691 prev->llc_extent.e_end,
6692 lod_comp->llc_extent.e_end);
6694 CDEBUG(D_LAYOUT, "new end %llu\n", new_end);
6695 lod_comp->llc_extent.e_start = new_end;
6696 prev->llc_extent.e_end = new_end;
6698 if (prev->llc_extent.e_end == lod_comp->llc_extent.e_end) {
6699 CDEBUG(D_LAYOUT, "Extension component exhausted\n");
6700 lod_comp->llc_id = LCME_ID_INVAL;
6704 /* rc == 1, failed to extend current component */
6707 /* Normal 'spillover' case - Remove the extension
6708 * space component & bring down the start of the next
6710 lod_comp->llc_id = LCME_ID_INVAL;
6712 if (!(prev->llc_flags & LCME_FL_INIT)) {
6713 prev->llc_id = LCME_ID_INVAL;
6716 lod_sel_adjust_extents(env, lo, *max_comp, index);
6717 } else if (lod_comp_inited(prev)) {
6718 /* If there is no next, and the previous component is
6719 * INIT'ed, try repeating the previous component. */
6720 LASSERT(repeated == 0);
6721 rc = lod_layout_repeat_comp(env, lo, index - 1);
6725 /* The previous component is a repeated component.
6726 * Record this so we don't keep trying to repeat it. */
6729 /* If the previous component is not INIT'ed, this may
6730 * be a component we have just instantiated but failed
6731 * to extend. Or even a repeated component we failed
6732 * to prepare a striping for. Do not repeat but instead
6733 * remove the repeated component & force the extention
6734 * of the original one */
6737 prev->llc_id = LCME_ID_INVAL;
6744 rc = lod_layout_del_prep_layout(env, lo, NULL);
6747 LASSERTF(-rc == change,
6748 "number deleted %d != requested %d\n", -rc,
6751 *max_comp = *max_comp + change;
6753 /* lod_del_prep_layout reallocates ldo_comp_entries, so we must
6754 * refresh these pointers before using them */
6755 lod_comp = &lo->ldo_comp_entries[index];
6756 prev = &lo->ldo_comp_entries[index - 1];
6757 CDEBUG(D_LAYOUT, "After extent updates: prev start %llu, current start "
6758 "%llu, current end %llu max_comp %d ldo_comp_cnt %d\n",
6759 prev->llc_extent.e_start, lod_comp->llc_extent.e_start,
6760 lod_comp->llc_extent.e_end, *max_comp, lo->ldo_comp_cnt);
6762 /* Layout changed successfully */
6767 * Declare layout extent updates
6769 * Handles extensions. Identifies extension components touched by current
6770 * operation and passes them to processing function.
6772 * Restarts with updated layouts from the processing function until the current
6773 * operation no longer touches an extension space component.
6775 * \param[in] env execution environment for this thread
6776 * \param[in,out] lo object to update the layout of
6777 * \param[in] extent layout extent for requested operation, update layout to
6778 * fit this operation
6779 * \param[in] th transaction handle for this operation
6780 * \param[in] pick identifies chosen mirror for FLR layouts
6781 * \param[in] write if this is write op
6783 * \retval 1 on layout changed, 0 on no change
6784 * \retval negative errno on error
6786 static int lod_declare_update_extents(const struct lu_env *env,
6787 struct lod_object *lo, struct lu_extent *extent,
6788 struct thandle *th, int pick, int write)
6790 struct lod_thread_info *info = lod_env_info(env);
6791 struct lod_layout_component *lod_comp;
6792 bool layout_changed = false;
6793 struct sel_data sd = { 0 };
6801 /* This makes us work on the components of the chosen mirror */
6802 start_index = lo->ldo_mirrors[pick].lme_start;
6803 max_comp = lo->ldo_mirrors[pick].lme_end + 1;
6804 if (lo->ldo_flr_state == LCM_FL_NONE)
6805 LASSERT(start_index == 0 && max_comp == lo->ldo_comp_cnt);
6807 CDEBUG(D_LAYOUT, "extent->e_start %llu, extent->e_end %llu\n",
6808 extent->e_start, extent->e_end);
6809 for (i = start_index; i < max_comp; i++) {
6810 lod_comp = &lo->ldo_comp_entries[i];
6812 /* We've passed all components of interest */
6813 if (lod_comp->llc_extent.e_start >= extent->e_end)
6816 if (lod_comp->llc_flags & LCME_FL_EXTENSION) {
6817 layout_changed = true;
6818 rc = lod_sel_handler(env, lo, extent, th, &max_comp,
6823 /* Nothing has changed behind the prev one */
6829 /* We may have added or removed components. If so, we must update the
6830 * start & ends of all the mirrors after the current one, and the end
6831 * of the current mirror. */
6832 change = max_comp - 1 - lo->ldo_mirrors[pick].lme_end;
6834 lo->ldo_mirrors[pick].lme_end += change;
6835 for (i = pick + 1; i < lo->ldo_mirror_count; i++) {
6836 lo->ldo_mirrors[i].lme_start += change;
6837 lo->ldo_mirrors[i].lme_end += change;
6843 /* The amount of components has changed, adjust the lti_comp_idx */
6844 rc2 = lod_layout_data_init(info, lo->ldo_comp_cnt);
6846 return rc < 0 ? rc : rc2 < 0 ? rc2 : layout_changed;
6849 /* If striping is already instantiated or INIT'ed DOM? */
6850 static bool lod_is_instantiation_needed(struct lod_layout_component *comp)
6852 return !(((lov_pattern(comp->llc_pattern) == LOV_PATTERN_MDT) &&
6853 lod_comp_inited(comp)) || comp->llc_stripe);
6857 * Declare layout update for a non-FLR layout.
6859 * \param[in] env execution environment for this thread
6860 * \param[in,out] lo object to update the layout of
6861 * \param[in] layout layout intent for requested operation, "update" is
6862 * a process of reacting to this
6863 * \param[in] buf buffer containing lov ea (see comment on usage inline)
6864 * \param[in] th transaction handle for this operation
6866 * \retval 0 on success
6867 * \retval negative errno on error
6869 static int lod_declare_update_plain(const struct lu_env *env,
6870 struct lod_object *lo, struct layout_intent *layout,
6871 const struct lu_buf *buf, struct thandle *th)
6873 struct lod_thread_info *info = lod_env_info(env);
6874 struct lod_device *d = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
6875 struct lod_layout_component *lod_comp;
6876 struct lov_comp_md_v1 *comp_v1 = NULL;
6877 bool layout_changed = false;
6878 bool replay = false;
6882 LASSERT(lo->ldo_flr_state == LCM_FL_NONE);
6885 * In case the client is passing lovea, which only happens during
6886 * the replay of layout intent write RPC for now, we may need to
6887 * parse the lovea and apply new layout configuration.
6889 if (buf && buf->lb_len) {
6890 struct lov_user_md_v1 *v1 = buf->lb_buf;
6892 if (v1->lmm_magic != (LOV_MAGIC_DEFINED | LOV_MAGIC_COMP_V1) &&
6893 v1->lmm_magic != __swab32(LOV_MAGIC_DEFINED |
6894 LOV_MAGIC_COMP_V1)) {
6895 CERROR("%s: the replay buffer of layout extend "
6896 "(magic %#x) does not contain expected "
6897 "composite layout.\n",
6898 lod2obd(d)->obd_name, v1->lmm_magic);
6899 GOTO(out, rc = -EINVAL);
6902 rc = lod_use_defined_striping(env, lo, buf);
6905 lo->ldo_comp_cached = 1;
6907 rc = lod_get_lov_ea(env, lo);
6910 /* old on-disk EA is stored in info->lti_buf */
6911 comp_v1 = (struct lov_comp_md_v1 *)info->lti_buf.lb_buf;
6913 layout_changed = true;
6915 rc = lod_layout_data_init(info, lo->ldo_comp_cnt);
6919 /* non replay path */
6920 rc = lod_striping_load(env, lo);
6925 /* Make sure defined layout covers the requested write range. */
6926 lod_comp = &lo->ldo_comp_entries[lo->ldo_comp_cnt - 1];
6927 if (lo->ldo_comp_cnt > 1 &&
6928 lod_comp->llc_extent.e_end != OBD_OBJECT_EOF &&
6929 lod_comp->llc_extent.e_end < layout->li_extent.e_end) {
6930 CDEBUG_LIMIT(replay ? D_ERROR : D_LAYOUT,
6931 "%s: the defined layout [0, %#llx) does not "
6932 "covers the write range "DEXT"\n",
6933 lod2obd(d)->obd_name, lod_comp->llc_extent.e_end,
6934 PEXT(&layout->li_extent));
6935 GOTO(out, rc = -EINVAL);
6938 CDEBUG(D_LAYOUT, "%s: "DFID": update components "DEXT"\n",
6939 lod2obd(d)->obd_name, PFID(lod_object_fid(lo)),
6940 PEXT(&layout->li_extent));
6943 rc = lod_declare_update_extents(env, lo, &layout->li_extent,
6944 th, 0, layout->li_opc == LAYOUT_INTENT_WRITE);
6948 layout_changed = true;
6952 * Iterate ld->ldo_comp_entries, find the component whose extent under
6953 * the write range and not instantianted.
6955 for (i = 0; i < lo->ldo_comp_cnt; i++) {
6956 lod_comp = &lo->ldo_comp_entries[i];
6958 if (lod_comp->llc_extent.e_start >= layout->li_extent.e_end)
6962 /* If striping is instantiated or INIT'ed DOM skip */
6963 if (!lod_is_instantiation_needed(lod_comp))
6967 * In replay path, lod_comp is the EA passed by
6968 * client replay buffer, comp_v1 is the pre-recovery
6969 * on-disk EA, we'd sift out those components which
6970 * were init-ed in the on-disk EA.
6972 if (le32_to_cpu(comp_v1->lcm_entries[i].lcme_flags) &
6977 * this component hasn't instantiated in normal path, or during
6978 * replay it needs replay the instantiation.
6981 /* A released component is being extended */
6982 if (lod_comp->llc_pattern & LOV_PATTERN_F_RELEASED)
6983 GOTO(out, rc = -EINVAL);
6985 LASSERT(info->lti_comp_idx != NULL);
6986 info->lti_comp_idx[info->lti_count++] = i;
6987 layout_changed = true;
6990 if (!layout_changed)
6993 lod_obj_inc_layout_gen(lo);
6994 rc = lod_declare_instantiate_components(env, lo, th);
6998 lod_striping_free(env, lo);
7002 static inline int lod_comp_index(struct lod_object *lo,
7003 struct lod_layout_component *lod_comp)
7005 LASSERT(lod_comp >= lo->ldo_comp_entries &&
7006 lod_comp <= &lo->ldo_comp_entries[lo->ldo_comp_cnt - 1]);
7008 return lod_comp - lo->ldo_comp_entries;
7012 * Stale other mirrors by writing extent.
7014 static int lod_stale_components(const struct lu_env *env, struct lod_object *lo,
7015 int primary, struct lu_extent *extent,
7018 struct lod_layout_component *pri_comp, *lod_comp;
7019 struct lu_extent pri_extent;
7024 /* The writing extent decides which components in the primary
7025 * are affected... */
7026 CDEBUG(D_LAYOUT, "primary mirror %d, "DEXT"\n", primary, PEXT(extent));
7029 lod_foreach_mirror_comp(pri_comp, lo, primary) {
7030 if (!lu_extent_is_overlapped(extent, &pri_comp->llc_extent))
7033 CDEBUG(D_LAYOUT, "primary comp %u "DEXT"\n",
7034 lod_comp_index(lo, pri_comp),
7035 PEXT(&pri_comp->llc_extent));
7037 pri_extent.e_start = pri_comp->llc_extent.e_start;
7038 pri_extent.e_end = pri_comp->llc_extent.e_end;
7040 for (i = 0; i < lo->ldo_mirror_count; i++) {
7043 rc = lod_declare_update_extents(env, lo, &pri_extent,
7045 /* if update_extents changed the layout, it may have
7046 * reallocated the component array, so start over to
7047 * avoid using stale pointers */
7053 /* ... and then stale other components that are
7054 * overlapping with primary components */
7055 lod_foreach_mirror_comp(lod_comp, lo, i) {
7056 if (!lu_extent_is_overlapped(
7058 &lod_comp->llc_extent))
7061 CDEBUG(D_LAYOUT, "stale: %u / %u\n",
7062 i, lod_comp_index(lo, lod_comp));
7064 lod_comp->llc_flags |= LCME_FL_STALE;
7065 lo->ldo_mirrors[i].lme_stale = 1;
7074 * check an OST's availability
7075 * \param[in] env execution environment
7076 * \param[in] lo lod object
7077 * \param[in] dt dt object
7078 * \param[in] index mirror index
7080 * \retval negative if failed
7081 * \retval 1 if \a dt is available
7082 * \retval 0 if \a dt is not available
7084 static inline int lod_check_ost_avail(const struct lu_env *env,
7085 struct lod_object *lo,
7086 struct dt_object *dt, int index)
7088 struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
7089 struct lod_tgt_desc *ost;
7091 int type = LU_SEQ_RANGE_OST;
7094 rc = lod_fld_lookup(env, lod, lu_object_fid(&dt->do_lu), &idx, &type);
7096 CERROR("%s: can't locate "DFID":rc = %d\n",
7097 lod2obd(lod)->obd_name, PFID(lu_object_fid(&dt->do_lu)),
7102 ost = OST_TGT(lod, idx);
7103 if (ost->ltd_statfs.os_state &
7104 (OS_STATE_READONLY | OS_STATE_ENOSPC | OS_STATE_ENOINO |
7105 OS_STATE_NOPRECREATE) ||
7106 ost->ltd_active == 0) {
7107 CDEBUG(D_LAYOUT, DFID ": mirror %d OST%d unavail, rc = %d\n",
7108 PFID(lod_object_fid(lo)), index, idx, rc);
7116 * Pick primary mirror for write
7117 * \param[in] env execution environment
7118 * \param[in] lo object
7119 * \param[in] extent write range
7121 static int lod_primary_pick(const struct lu_env *env, struct lod_object *lo,
7122 struct lu_extent *extent)
7124 struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
7125 unsigned int seq = 0;
7126 struct lod_layout_component *lod_comp;
7128 int picked = -1, second_pick = -1, third_pick = -1;
7131 if (OBD_FAIL_CHECK(OBD_FAIL_FLR_RANDOM_PICK_MIRROR)) {
7132 get_random_bytes(&seq, sizeof(seq));
7133 seq %= lo->ldo_mirror_count;
7137 * Pick a mirror as the primary, and check the availability of OSTs.
7139 * This algo can be revised later after knowing the topology of
7142 lod_qos_statfs_update(env, lod, &lod->lod_ost_descs);
7143 for (i = 0; i < lo->ldo_mirror_count; i++) {
7144 bool ost_avail = true;
7145 int index = (i + seq) % lo->ldo_mirror_count;
7147 if (lo->ldo_mirrors[index].lme_stale) {
7148 CDEBUG(D_LAYOUT, DFID": mirror %d stale\n",
7149 PFID(lod_object_fid(lo)), index);
7153 /* 2nd pick is for the primary mirror containing unavail OST */
7154 if (lo->ldo_mirrors[index].lme_primary && second_pick < 0)
7155 second_pick = index;
7157 /* 3rd pick is for non-primary mirror containing unavail OST */
7158 if (second_pick < 0 && third_pick < 0)
7162 * we found a non-primary 1st pick, we'd like to find a
7163 * potential pirmary mirror.
7165 if (picked >= 0 && !lo->ldo_mirrors[index].lme_primary)
7168 /* check the availability of OSTs */
7169 lod_foreach_mirror_comp(lod_comp, lo, index) {
7170 if (!lod_comp_inited(lod_comp) || !lod_comp->llc_stripe)
7173 for (j = 0; j < lod_comp->llc_stripe_count; j++) {
7174 struct dt_object *dt = lod_comp->llc_stripe[j];
7176 rc = lod_check_ost_avail(env, lo, dt, index);
7183 } /* for all dt object in one component */
7186 } /* for all components in a mirror */
7189 * the OSTs where allocated objects locates in the components
7190 * of the mirror are available.
7195 /* this mirror has all OSTs available */
7199 * primary with all OSTs are available, this is the perfect
7202 if (lo->ldo_mirrors[index].lme_primary)
7204 } /* for all mirrors */
7206 /* failed to pick a sound mirror, lower our expectation */
7208 picked = second_pick;
7210 picked = third_pick;
7217 static int lod_prepare_resync_mirror(const struct lu_env *env,
7218 struct lod_object *lo,
7221 struct lod_thread_info *info = lod_env_info(env);
7222 struct lod_layout_component *lod_comp;
7223 bool neg = !!(MIRROR_ID_NEG & mirror_id);
7226 mirror_id &= ~MIRROR_ID_NEG;
7228 for (i = 0; i < lo->ldo_mirror_count; i++) {
7229 if ((!neg && lo->ldo_mirrors[i].lme_id != mirror_id) ||
7230 (neg && lo->ldo_mirrors[i].lme_id == mirror_id))
7233 lod_foreach_mirror_comp(lod_comp, lo, i) {
7234 if (lod_comp_inited(lod_comp))
7237 info->lti_comp_idx[info->lti_count++] =
7238 lod_comp_index(lo, lod_comp);
7246 * figure out the components should be instantiated for resync.
7248 static int lod_prepare_resync(const struct lu_env *env, struct lod_object *lo,
7249 struct lu_extent *extent)
7251 struct lod_thread_info *info = lod_env_info(env);
7252 struct lod_layout_component *lod_comp;
7253 unsigned int need_sync = 0;
7257 DFID": instantiate all stale components in "DEXT"\n",
7258 PFID(lod_object_fid(lo)), PEXT(extent));
7261 * instantiate all components within this extent, even non-stale
7264 for (i = 0; i < lo->ldo_mirror_count; i++) {
7265 if (!lo->ldo_mirrors[i].lme_stale)
7268 lod_foreach_mirror_comp(lod_comp, lo, i) {
7269 if (!lu_extent_is_overlapped(extent,
7270 &lod_comp->llc_extent))
7275 if (lod_comp_inited(lod_comp))
7278 CDEBUG(D_LAYOUT, "resync instantiate %d / %d\n",
7279 i, lod_comp_index(lo, lod_comp));
7280 info->lti_comp_idx[info->lti_count++] =
7281 lod_comp_index(lo, lod_comp);
7285 return need_sync ? 0 : -EALREADY;
7288 static int lod_declare_update_rdonly(const struct lu_env *env,
7289 struct lod_object *lo, struct md_layout_change *mlc,
7292 struct lod_thread_info *info = lod_env_info(env);
7293 struct lu_attr *layout_attr = &info->lti_layout_attr;
7294 struct lod_layout_component *lod_comp;
7295 struct lu_extent extent = { 0 };
7299 LASSERT(lo->ldo_flr_state == LCM_FL_RDONLY);
7300 LASSERT(mlc->mlc_opc == MD_LAYOUT_WRITE ||
7301 mlc->mlc_opc == MD_LAYOUT_RESYNC);
7302 LASSERT(lo->ldo_mirror_count > 0);
7304 if (mlc->mlc_opc == MD_LAYOUT_WRITE) {
7305 struct layout_intent *layout = mlc->mlc_intent;
7306 int write = layout->li_opc == LAYOUT_INTENT_WRITE;
7309 extent = layout->li_extent;
7310 CDEBUG(D_LAYOUT, DFID": trying to write :"DEXT"\n",
7311 PFID(lod_object_fid(lo)), PEXT(&extent));
7313 picked = lod_primary_pick(env, lo, &extent);
7317 CDEBUG(D_LAYOUT, DFID": picked mirror id %u as primary\n",
7318 PFID(lod_object_fid(lo)),
7319 lo->ldo_mirrors[picked].lme_id);
7321 /* Update extents of primary before staling */
7322 rc = lod_declare_update_extents(env, lo, &extent, th, picked,
7327 if (layout->li_opc == LAYOUT_INTENT_TRUNC) {
7329 * trunc transfers [0, size) in the intent extent, we'd
7330 * stale components overlapping [size, eof).
7332 extent.e_start = extent.e_end;
7333 extent.e_end = OBD_OBJECT_EOF;
7336 /* stale overlapping components from other mirrors */
7337 rc = lod_stale_components(env, lo, picked, &extent, th);
7341 /* restore truncate intent extent */
7342 if (layout->li_opc == LAYOUT_INTENT_TRUNC)
7343 extent.e_end = extent.e_start;
7345 /* instantiate components for the picked mirror, start from 0 */
7348 lod_foreach_mirror_comp(lod_comp, lo, picked) {
7349 if (!lu_extent_is_overlapped(&extent,
7350 &lod_comp->llc_extent))
7353 if (!lod_is_instantiation_needed(lod_comp))
7356 info->lti_comp_idx[info->lti_count++] =
7357 lod_comp_index(lo, lod_comp);
7360 lo->ldo_flr_state = LCM_FL_WRITE_PENDING;
7361 } else { /* MD_LAYOUT_RESYNC */
7365 * could contain multiple non-stale mirrors, so we need to
7366 * prep uninited all components assuming any non-stale mirror
7367 * could be picked as the primary mirror.
7369 if (mlc->mlc_mirror_id == 0) {
7371 for (i = 0; i < lo->ldo_mirror_count; i++) {
7372 if (lo->ldo_mirrors[i].lme_stale)
7375 lod_foreach_mirror_comp(lod_comp, lo, i) {
7376 if (!lod_comp_inited(lod_comp))
7380 lod_comp->llc_extent.e_end)
7382 lod_comp->llc_extent.e_end;
7385 rc = lod_prepare_resync(env, lo, &extent);
7389 /* mirror write, try to init its all components */
7390 rc = lod_prepare_resync_mirror(env, lo,
7391 mlc->mlc_mirror_id);
7396 /* change the file state to SYNC_PENDING */
7397 lo->ldo_flr_state = LCM_FL_SYNC_PENDING;
7400 /* Reset the layout version once it's becoming too large.
7401 * This way it can make sure that the layout version is
7402 * monotonously increased in this writing era. */
7403 lod_obj_inc_layout_gen(lo);
7404 if (lo->ldo_layout_gen > (LCME_ID_MAX >> 1)) {
7405 __u32 layout_version;
7407 get_random_bytes(&layout_version, sizeof(layout_version));
7408 lo->ldo_layout_gen = layout_version & 0xffff;
7411 rc = lod_declare_instantiate_components(env, lo, th);
7415 layout_attr->la_valid = LA_LAYOUT_VERSION;
7416 layout_attr->la_layout_version = 0; /* set current version */
7417 if (mlc->mlc_opc == MD_LAYOUT_RESYNC)
7418 layout_attr->la_layout_version = LU_LAYOUT_RESYNC;
7419 rc = lod_declare_attr_set(env, &lo->ldo_obj, layout_attr, th);
7425 lod_striping_free(env, lo);
7429 static int lod_declare_update_write_pending(const struct lu_env *env,
7430 struct lod_object *lo, struct md_layout_change *mlc,
7433 struct lod_thread_info *info = lod_env_info(env);
7434 struct lu_attr *layout_attr = &info->lti_layout_attr;
7435 struct lod_layout_component *lod_comp;
7436 struct lu_extent extent = { 0 };
7442 LASSERT(lo->ldo_flr_state == LCM_FL_WRITE_PENDING);
7443 LASSERT(mlc->mlc_opc == MD_LAYOUT_WRITE ||
7444 mlc->mlc_opc == MD_LAYOUT_RESYNC);
7446 /* look for the primary mirror */
7447 for (i = 0; i < lo->ldo_mirror_count; i++) {
7448 if (lo->ldo_mirrors[i].lme_stale)
7451 LASSERTF(primary < 0, DFID " has multiple primary: %u / %u",
7452 PFID(lod_object_fid(lo)),
7453 lo->ldo_mirrors[i].lme_id,
7454 lo->ldo_mirrors[primary].lme_id);
7459 CERROR(DFID ": doesn't have a primary mirror\n",
7460 PFID(lod_object_fid(lo)));
7461 GOTO(out, rc = -ENODATA);
7464 CDEBUG(D_LAYOUT, DFID": found primary %u\n",
7465 PFID(lod_object_fid(lo)), lo->ldo_mirrors[primary].lme_id);
7467 LASSERT(!lo->ldo_mirrors[primary].lme_stale);
7469 /* for LAYOUT_WRITE opc, it has to do the following operations:
7470 * 1. stale overlapping componets from stale mirrors;
7471 * 2. instantiate components of the primary mirror;
7472 * 3. transfter layout version to all objects of the primary;
7474 * for LAYOUT_RESYNC opc, it will do:
7475 * 1. instantiate components of all stale mirrors;
7476 * 2. transfer layout version to all objects to close write era. */
7478 if (mlc->mlc_opc == MD_LAYOUT_WRITE) {
7479 struct layout_intent *layout = mlc->mlc_intent;
7480 int write = layout->li_opc == LAYOUT_INTENT_WRITE;
7482 LASSERT(mlc->mlc_intent != NULL);
7484 extent = mlc->mlc_intent->li_extent;
7486 CDEBUG(D_LAYOUT, DFID": intent to write: "DEXT"\n",
7487 PFID(lod_object_fid(lo)), PEXT(&extent));
7489 /* 1. Update extents of primary before staling */
7490 rc = lod_declare_update_extents(env, lo, &extent, th, primary,
7495 if (mlc->mlc_intent->li_opc == LAYOUT_INTENT_TRUNC) {
7497 * trunc transfers [0, size) in the intent extent, we'd
7498 * stale components overlapping [size, eof).
7500 extent.e_start = extent.e_end;
7501 extent.e_end = OBD_OBJECT_EOF;
7504 /* 2. stale overlapping components */
7505 rc = lod_stale_components(env, lo, primary, &extent, th);
7509 /* 3. find the components which need instantiating.
7510 * instantiate [0, mlc->mlc_intent->e_end) */
7512 /* restore truncate intent extent */
7513 if (mlc->mlc_intent->li_opc == LAYOUT_INTENT_TRUNC)
7514 extent.e_end = extent.e_start;
7517 lod_foreach_mirror_comp(lod_comp, lo, primary) {
7518 if (!lu_extent_is_overlapped(&extent,
7519 &lod_comp->llc_extent))
7522 if (!lod_is_instantiation_needed(lod_comp))
7525 CDEBUG(D_LAYOUT, "write instantiate %d / %d\n",
7526 primary, lod_comp_index(lo, lod_comp));
7527 info->lti_comp_idx[info->lti_count++] =
7528 lod_comp_index(lo, lod_comp);
7530 } else { /* MD_LAYOUT_RESYNC */
7531 if (mlc->mlc_mirror_id == 0) {
7533 lod_foreach_mirror_comp(lod_comp, lo, primary) {
7534 if (!lod_comp_inited(lod_comp))
7537 extent.e_end = lod_comp->llc_extent.e_end;
7540 rc = lod_prepare_resync(env, lo, &extent);
7544 /* mirror write, try to init its all components */
7545 rc = lod_prepare_resync_mirror(env, lo,
7546 mlc->mlc_mirror_id);
7551 /* change the file state to SYNC_PENDING */
7552 lo->ldo_flr_state = LCM_FL_SYNC_PENDING;
7555 rc = lod_declare_instantiate_components(env, lo, th);
7559 /* 3. transfer layout version to OST objects.
7560 * transfer new layout version to OST objects so that stale writes
7561 * can be denied. It also ends an era of writing by setting
7562 * LU_LAYOUT_RESYNC. Normal client can never use this bit to
7563 * send write RPC; only resync RPCs could do it. */
7564 layout_attr->la_valid = LA_LAYOUT_VERSION;
7565 layout_attr->la_layout_version = 0; /* set current version */
7566 if (mlc->mlc_opc == MD_LAYOUT_RESYNC)
7567 layout_attr->la_layout_version = LU_LAYOUT_RESYNC;
7568 rc = lod_declare_attr_set(env, &lo->ldo_obj, layout_attr, th);
7572 lod_obj_inc_layout_gen(lo);
7575 lod_striping_free(env, lo);
7579 static int lod_declare_update_sync_pending(const struct lu_env *env,
7580 struct lod_object *lo, struct md_layout_change *mlc,
7583 struct lod_thread_info *info = lod_env_info(env);
7584 unsigned sync_components = 0;
7585 unsigned resync_components = 0;
7590 LASSERT(lo->ldo_flr_state == LCM_FL_SYNC_PENDING);
7591 LASSERT(mlc->mlc_opc == MD_LAYOUT_RESYNC_DONE ||
7592 mlc->mlc_opc == MD_LAYOUT_WRITE);
7594 CDEBUG(D_LAYOUT, DFID ": received op %d in sync pending\n",
7595 PFID(lod_object_fid(lo)), mlc->mlc_opc);
7597 if (mlc->mlc_opc == MD_LAYOUT_WRITE) {
7598 CDEBUG(D_LAYOUT, DFID": cocurrent write to sync pending\n",
7599 PFID(lod_object_fid(lo)));
7601 lo->ldo_flr_state = LCM_FL_WRITE_PENDING;
7602 return lod_declare_update_write_pending(env, lo, mlc, th);
7605 /* MD_LAYOUT_RESYNC_DONE */
7607 for (i = 0; i < lo->ldo_comp_cnt; i++) {
7608 struct lod_layout_component *lod_comp;
7611 lod_comp = &lo->ldo_comp_entries[i];
7613 if (!(lod_comp->llc_flags & LCME_FL_STALE)) {
7618 for (j = 0; j < mlc->mlc_resync_count; j++) {
7619 if (lod_comp->llc_id != mlc->mlc_resync_ids[j])
7622 mlc->mlc_resync_ids[j] = LCME_ID_INVAL;
7623 lod_comp->llc_flags &= ~LCME_FL_STALE;
7624 resync_components++;
7630 for (i = 0; i < mlc->mlc_resync_count; i++) {
7631 if (mlc->mlc_resync_ids[i] == LCME_ID_INVAL)
7634 CDEBUG(D_LAYOUT, DFID": lcme id %u (%d / %zd) not exist "
7635 "or already synced\n", PFID(lod_object_fid(lo)),
7636 mlc->mlc_resync_ids[i], i, mlc->mlc_resync_count);
7637 GOTO(out, rc = -EINVAL);
7640 if (!sync_components || (mlc->mlc_resync_count && !resync_components)) {
7641 CDEBUG(D_LAYOUT, DFID": no mirror in sync\n",
7642 PFID(lod_object_fid(lo)));
7644 /* tend to return an error code here to prevent
7645 * the MDT from setting SoM attribute */
7646 GOTO(out, rc = -EINVAL);
7649 CDEBUG(D_LAYOUT, DFID": synced %u resynced %u/%zu components\n",
7650 PFID(lod_object_fid(lo)),
7651 sync_components, resync_components, mlc->mlc_resync_count);
7653 lo->ldo_flr_state = LCM_FL_RDONLY;
7654 lod_obj_inc_layout_gen(lo);
7656 info->lti_buf.lb_len = lod_comp_md_size(lo, false);
7657 rc = lod_sub_declare_xattr_set(env, lod_object_child(lo),
7658 &info->lti_buf, XATTR_NAME_LOV, 0, th);
7663 lod_striping_free(env, lo);
7667 typedef int (*mlc_handler)(const struct lu_env *env, struct dt_object *dt,
7668 const struct md_layout_change *mlc,
7669 struct thandle *th);
7672 * Attach stripes after target's for migrating directory. NB, we
7673 * only need to declare this, the actual work is done inside
7674 * lod_xattr_set_lmv().
7676 * \param[in] env execution environment
7677 * \param[in] dt target object
7678 * \param[in] mlc layout change data
7679 * \param[in] th transaction handle
7681 * \retval 0 on success
7682 * \retval negative if failed
7684 static int lod_dir_declare_layout_attach(const struct lu_env *env,
7685 struct dt_object *dt,
7686 const struct md_layout_change *mlc,
7689 struct lod_thread_info *info = lod_env_info(env);
7690 struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev);
7691 struct lod_tgt_descs *ltd = &lod->lod_mdt_descs;
7692 struct lod_object *lo = lod_dt_obj(dt);
7693 struct dt_object *next = dt_object_child(dt);
7694 struct dt_object_format *dof = &info->lti_format;
7695 struct lmv_mds_md_v1 *lmv = mlc->mlc_buf.lb_buf;
7696 struct dt_object **stripes;
7697 __u32 stripe_count = le32_to_cpu(lmv->lmv_stripe_count);
7698 struct lu_fid *fid = &info->lti_fid;
7699 struct lod_tgt_desc *tgt;
7700 struct dt_object *dto;
7701 struct dt_device *tgt_dt;
7702 int type = LU_SEQ_RANGE_ANY;
7703 struct dt_insert_rec *rec = &info->lti_dt_rec;
7704 char *stripe_name = info->lti_key;
7705 struct lu_name *sname;
7706 struct linkea_data ldata = { NULL };
7707 struct lu_buf linkea_buf;
7714 if (!lmv_is_sane(lmv))
7717 if (!dt_try_as_dir(env, dt))
7720 dof->dof_type = DFT_DIR;
7723 sizeof(*stripes) * (lo->ldo_dir_stripe_count + stripe_count));
7727 for (i = 0; i < lo->ldo_dir_stripe_count; i++)
7728 stripes[i] = lo->ldo_stripe[i];
7730 rec->rec_type = S_IFDIR;
7732 for (i = 0; i < stripe_count; i++) {
7734 &lmv->lmv_stripe_fids[i]);
7735 if (!fid_is_sane(fid))
7738 rc = lod_fld_lookup(env, lod, fid, &idx, &type);
7742 if (idx == lod2lu_dev(lod)->ld_site->ld_seq_site->ss_node_id) {
7743 tgt_dt = lod->lod_child;
7745 tgt = LTD_TGT(ltd, idx);
7747 GOTO(out, rc = -ESTALE);
7748 tgt_dt = tgt->ltd_tgt;
7751 dto = dt_locate_at(env, tgt_dt, fid,
7752 lo->ldo_obj.do_lu.lo_dev->ld_site->ls_top_dev,
7755 GOTO(out, rc = PTR_ERR(dto));
7757 stripes[i + lo->ldo_dir_stripe_count] = dto;
7759 if (!dt_try_as_dir(env, dto))
7760 GOTO(out, rc = -ENOTDIR);
7762 rc = lod_sub_declare_ref_add(env, dto, th);
7766 rec->rec_fid = lu_object_fid(&dto->do_lu);
7767 rc = lod_sub_declare_insert(env, dto,
7768 (const struct dt_rec *)rec,
7769 (const struct dt_key *)dot, th);
7773 rc = lod_sub_declare_insert(env, dto,
7774 (const struct dt_rec *)rec,
7775 (const struct dt_key *)dotdot, th);
7779 rc = lod_sub_declare_xattr_set(env, dto, &mlc->mlc_buf,
7780 XATTR_NAME_LMV, 0, th);
7784 snprintf(stripe_name, sizeof(info->lti_key), DFID":%u",
7785 PFID(lu_object_fid(&dto->do_lu)),
7786 i + lo->ldo_dir_stripe_count);
7788 sname = lod_name_get(env, stripe_name, strlen(stripe_name));
7789 rc = linkea_links_new(&ldata, &info->lti_linkea_buf,
7790 sname, lu_object_fid(&dt->do_lu));
7794 linkea_buf.lb_buf = ldata.ld_buf->lb_buf;
7795 linkea_buf.lb_len = ldata.ld_leh->leh_len;
7796 rc = lod_sub_declare_xattr_set(env, dto, &linkea_buf,
7797 XATTR_NAME_LINK, 0, th);
7801 rc = lod_sub_declare_insert(env, next,
7802 (const struct dt_rec *)rec,
7803 (const struct dt_key *)stripe_name,
7808 rc = lod_sub_declare_ref_add(env, next, th);
7814 OBD_FREE(lo->ldo_stripe,
7815 sizeof(*stripes) * lo->ldo_dir_stripes_allocated);
7816 lo->ldo_stripe = stripes;
7817 lo->ldo_dir_migrate_offset = lo->ldo_dir_stripe_count;
7818 lo->ldo_dir_migrate_hash = le32_to_cpu(lmv->lmv_hash_type);
7819 lo->ldo_dir_stripe_count += stripe_count;
7820 lo->ldo_dir_stripes_allocated += stripe_count;
7822 /* plain directory split creates target as a plain directory, while
7823 * after source attached as the first stripe, it becomes a striped
7824 * directory, set correct do_index_ops, otherwise it can't be unlinked.
7826 dt->do_index_ops = &lod_striped_index_ops;
7830 i = lo->ldo_dir_stripe_count;
7831 while (i < lo->ldo_dir_stripe_count + stripe_count && stripes[i])
7832 dt_object_put(env, stripes[i++]);
7835 sizeof(*stripes) * (stripe_count + lo->ldo_dir_stripe_count));
7839 static int lod_dir_declare_layout_detach(const struct lu_env *env,
7840 struct dt_object *dt,
7841 const struct md_layout_change *unused,
7844 struct lod_thread_info *info = lod_env_info(env);
7845 struct lod_object *lo = lod_dt_obj(dt);
7846 struct dt_object *next = dt_object_child(dt);
7847 char *stripe_name = info->lti_key;
7848 struct dt_object *dto;
7852 if (!dt_try_as_dir(env, dt))
7855 if (!lo->ldo_dir_stripe_count)
7856 return lod_sub_declare_delete(env, next,
7857 (const struct dt_key *)dotdot, th);
7859 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
7860 dto = lo->ldo_stripe[i];
7864 if (!dt_try_as_dir(env, dto))
7867 rc = lod_sub_declare_delete(env, dto,
7868 (const struct dt_key *)dotdot, th);
7872 snprintf(stripe_name, sizeof(info->lti_key), DFID":%d",
7873 PFID(lu_object_fid(&dto->do_lu)), i);
7875 rc = lod_sub_declare_delete(env, next,
7876 (const struct dt_key *)stripe_name, th);
7880 rc = lod_sub_declare_ref_del(env, next, th);
7888 static int dt_dir_is_empty(const struct lu_env *env,
7889 struct dt_object *obj)
7892 const struct dt_it_ops *iops;
7897 if (!dt_try_as_dir(env, obj))
7900 iops = &obj->do_index_ops->dio_it;
7901 it = iops->init(env, obj, LUDA_64BITHASH);
7903 RETURN(PTR_ERR(it));
7905 rc = iops->get(env, it, (const struct dt_key *)"");
7909 for (rc = 0, i = 0; rc == 0 && i < 3; ++i)
7910 rc = iops->next(env, it);
7916 /* Huh? Index contains no zero key? */
7921 iops->fini(env, it);
7926 static int lod_dir_declare_layout_shrink(const struct lu_env *env,
7927 struct dt_object *dt,
7928 const struct md_layout_change *mlc,
7931 struct lod_thread_info *info = lod_env_info(env);
7932 struct lod_object *lo = lod_dt_obj(dt);
7933 struct dt_object *next = dt_object_child(dt);
7934 struct lmv_user_md *lmu = mlc->mlc_buf.lb_buf;
7935 __u32 final_stripe_count;
7936 char *stripe_name = info->lti_key;
7937 struct lu_buf *lmv_buf = &info->lti_buf;
7938 struct dt_object *dto;
7944 if (!dt_try_as_dir(env, dt))
7947 /* shouldn't be called on plain directory */
7948 LASSERT(lo->ldo_dir_stripe_count);
7950 lmv_buf->lb_buf = &info->lti_lmv.lmv_md_v1;
7951 lmv_buf->lb_len = sizeof(info->lti_lmv.lmv_md_v1);
7953 final_stripe_count = le32_to_cpu(lmu->lum_stripe_count);
7954 LASSERT(final_stripe_count &&
7955 final_stripe_count < lo->ldo_dir_stripe_count);
7957 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
7958 dto = lo->ldo_stripe[i];
7962 if (i < final_stripe_count) {
7963 if (final_stripe_count == 1)
7966 rc = lod_sub_declare_xattr_set(env, dto, lmv_buf,
7968 LU_XATTR_REPLACE, th);
7975 rc = dt_dir_is_empty(env, dto);
7979 rc = lod_sub_declare_ref_del(env, dto, th);
7983 rc = lod_sub_declare_destroy(env, dto, th);
7987 snprintf(stripe_name, sizeof(info->lti_key), DFID":%d",
7988 PFID(lu_object_fid(&dto->do_lu)), i);
7990 rc = lod_sub_declare_delete(env, next,
7991 (const struct dt_key *)stripe_name, th);
7995 rc = lod_sub_declare_ref_del(env, next, th);
8000 rc = lod_sub_declare_xattr_set(env, next, lmv_buf, XATTR_NAME_LMV,
8001 LU_XATTR_REPLACE, th);
8006 * Allocate stripes for split directory.
8008 * \param[in] env execution environment
8009 * \param[in] dt target object
8010 * \param[in] mlc layout change data
8011 * \param[in] th transaction handle
8013 * \retval 0 on success
8014 * \retval negative if failed
8016 static int lod_dir_declare_layout_split(const struct lu_env *env,
8017 struct dt_object *dt,
8018 const struct md_layout_change *mlc,
8021 struct lod_thread_info *info = lod_env_info(env);
8022 struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev);
8023 struct lod_object *lo = lod_dt_obj(dt);
8024 struct dt_object_format *dof = &info->lti_format;
8025 struct lmv_user_md_v1 *lum = mlc->mlc_spec->u.sp_ea.eadata;
8026 struct dt_object **stripes;
8034 LASSERT(le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC);
8035 LASSERT(le32_to_cpu(lum->lum_stripe_offset) == LMV_OFFSET_DEFAULT);
8037 saved_count = lo->ldo_dir_stripes_allocated;
8038 stripe_count = le32_to_cpu(lum->lum_stripe_count);
8039 if (stripe_count <= saved_count)
8042 dof->dof_type = DFT_DIR;
8044 OBD_ALLOC(stripes, sizeof(*stripes) * stripe_count);
8048 for (i = 0; i < lo->ldo_dir_stripes_allocated; i++)
8049 stripes[i] = lo->ldo_stripe[i];
8051 lod_qos_statfs_update(env, lod, &lod->lod_mdt_descs);
8052 rc = lod_mdt_alloc_qos(env, lo, stripes, saved_count, stripe_count);
8054 rc = lod_mdt_alloc_rr(env, lo, stripes, saved_count,
8057 OBD_FREE(stripes, sizeof(*stripes) * stripe_count);
8061 LASSERT(rc > saved_count);
8062 OBD_FREE(lo->ldo_stripe,
8063 sizeof(*stripes) * lo->ldo_dir_stripes_allocated);
8064 lo->ldo_stripe = stripes;
8065 lo->ldo_dir_striped = 1;
8066 lo->ldo_dir_stripe_count = rc;
8067 lo->ldo_dir_stripes_allocated = stripe_count;
8068 lo->ldo_dir_split_hash = lo->ldo_dir_hash_type;
8069 lo->ldo_dir_hash_type = le32_to_cpu(lum->lum_hash_type);
8070 if (!lmv_is_known_hash_type(lo->ldo_dir_hash_type))
8071 lo->ldo_dir_hash_type =
8072 lod->lod_mdt_descs.ltd_lmv_desc.ld_pattern;
8073 lo->ldo_dir_hash_type |= LMV_HASH_FLAG_SPLIT | LMV_HASH_FLAG_MIGRATION;
8074 lo->ldo_dir_split_offset = saved_count;
8075 lo->ldo_dir_layout_version++;
8076 lo->ldo_dir_stripe_loaded = 1;
8078 rc = lod_dir_declare_create_stripes(env, dt, mlc->mlc_attr, dof, th);
8080 lod_striping_free(env, lo);
8086 * detach all stripes from dir master object, NB, stripes are not destroyed, but
8087 * deleted from it's parent namespace, this function is called in two places:
8088 * 1. mdd_migrate_mdt() detach stripes from source, and attach them to
8090 * 2. mdd_dir_layout_update() detach stripe before turning 1-stripe directory to
8091 * a plain directory.
8093 * \param[in] env execution environment
8094 * \param[in] dt target object
8095 * \param[in] mlc layout change data
8096 * \param[in] th transaction handle
8098 * \retval 0 on success
8099 * \retval negative if failed
8101 static int lod_dir_layout_detach(const struct lu_env *env,
8102 struct dt_object *dt,
8103 const struct md_layout_change *mlc,
8106 struct lod_thread_info *info = lod_env_info(env);
8107 struct lod_object *lo = lod_dt_obj(dt);
8108 struct dt_object *next = dt_object_child(dt);
8109 char *stripe_name = info->lti_key;
8110 struct dt_object *dto;
8116 if (!lo->ldo_dir_stripe_count) {
8117 /* plain directory delete .. */
8118 rc = lod_sub_delete(env, next,
8119 (const struct dt_key *)dotdot, th);
8123 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
8124 dto = lo->ldo_stripe[i];
8128 rc = lod_sub_delete(env, dto,
8129 (const struct dt_key *)dotdot, th);
8133 snprintf(stripe_name, sizeof(info->lti_key), DFID":%d",
8134 PFID(lu_object_fid(&dto->do_lu)), i);
8136 rc = lod_sub_delete(env, next,
8137 (const struct dt_key *)stripe_name, th);
8141 rc = lod_sub_ref_del(env, next, th);
8146 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
8147 dto = lo->ldo_stripe[i];
8149 dt_object_put(env, dto);
8151 OBD_FREE(lo->ldo_stripe,
8152 sizeof(struct dt_object *) * lo->ldo_dir_stripes_allocated);
8153 lo->ldo_stripe = NULL;
8154 lo->ldo_dir_stripes_allocated = 0;
8155 lo->ldo_dir_stripe_count = 0;
8160 static int lod_dir_layout_shrink(const struct lu_env *env,
8161 struct dt_object *dt,
8162 const struct md_layout_change *mlc,
8165 struct lod_thread_info *info = lod_env_info(env);
8166 struct lod_object *lo = lod_dt_obj(dt);
8167 struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
8168 struct dt_object *next = dt_object_child(dt);
8169 struct lmv_user_md *lmu = mlc->mlc_buf.lb_buf;
8170 __u32 final_stripe_count;
8171 char *stripe_name = info->lti_key;
8172 struct dt_object *dto;
8173 struct lu_buf *lmv_buf = &info->lti_buf;
8174 struct lmv_mds_md_v1 *lmv = &info->lti_lmv.lmv_md_v1;
8176 int type = LU_SEQ_RANGE_ANY;
8182 final_stripe_count = le32_to_cpu(lmu->lum_stripe_count);
8184 lmv_buf->lb_buf = lmv;
8185 lmv_buf->lb_len = sizeof(*lmv);
8186 lmv->lmv_magic = cpu_to_le32(LMV_MAGIC_STRIPE);
8187 lmv->lmv_stripe_count = cpu_to_le32(final_stripe_count);
8188 lmv->lmv_hash_type = cpu_to_le32(lo->ldo_dir_hash_type) &
8189 cpu_to_le32(LMV_HASH_TYPE_MASK);
8190 lmv->lmv_layout_version =
8191 cpu_to_le32(lo->ldo_dir_layout_version + 1);
8193 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
8194 dto = lo->ldo_stripe[i];
8198 if (i < final_stripe_count) {
8199 /* if only one stripe left, no need to update
8200 * LMV because this stripe will replace master
8201 * object and act as a plain directory.
8203 if (final_stripe_count == 1)
8207 rc = lod_fld_lookup(env, lod,
8208 lu_object_fid(&dto->do_lu),
8213 lmv->lmv_master_mdt_index = cpu_to_le32(mdtidx);
8214 rc = lod_sub_xattr_set(env, dto, lmv_buf,
8216 LU_XATTR_REPLACE, th);
8223 dt_write_lock(env, dto, DT_TGT_CHILD);
8224 rc = lod_sub_ref_del(env, dto, th);
8225 dt_write_unlock(env, dto);
8229 rc = lod_sub_destroy(env, dto, th);
8233 snprintf(stripe_name, sizeof(info->lti_key), DFID":%d",
8234 PFID(lu_object_fid(&dto->do_lu)), i);
8236 rc = lod_sub_delete(env, next,
8237 (const struct dt_key *)stripe_name, th);
8241 rc = lod_sub_ref_del(env, next, th);
8246 rc = lod_fld_lookup(env, lod, lu_object_fid(&dt->do_lu), &mdtidx,
8251 lmv->lmv_magic = cpu_to_le32(LMV_MAGIC_V1);
8252 lmv->lmv_master_mdt_index = cpu_to_le32(mdtidx);
8253 rc = lod_sub_xattr_set(env, next, lmv_buf, XATTR_NAME_LMV,
8254 LU_XATTR_REPLACE, th);
8258 for (i = final_stripe_count; i < lo->ldo_dir_stripe_count; i++) {
8259 dto = lo->ldo_stripe[i];
8261 dt_object_put(env, dto);
8263 lo->ldo_dir_stripe_count = final_stripe_count;
8268 static mlc_handler dir_mlc_declare_ops[MD_LAYOUT_MAX] = {
8269 [MD_LAYOUT_ATTACH] = lod_dir_declare_layout_attach,
8270 [MD_LAYOUT_DETACH] = lod_dir_declare_layout_detach,
8271 [MD_LAYOUT_SHRINK] = lod_dir_declare_layout_shrink,
8272 [MD_LAYOUT_SPLIT] = lod_dir_declare_layout_split,
8275 static mlc_handler dir_mlc_ops[MD_LAYOUT_MAX] = {
8276 [MD_LAYOUT_DETACH] = lod_dir_layout_detach,
8277 [MD_LAYOUT_SHRINK] = lod_dir_layout_shrink,
8280 static int lod_declare_layout_change(const struct lu_env *env,
8281 struct dt_object *dt, struct md_layout_change *mlc,
8284 struct lod_thread_info *info = lod_env_info(env);
8285 struct lod_object *lo = lod_dt_obj(dt);
8290 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
8291 LASSERT(dir_mlc_declare_ops[mlc->mlc_opc]);
8292 rc = dir_mlc_declare_ops[mlc->mlc_opc](env, dt, mlc, th);
8296 if (!S_ISREG(dt->do_lu.lo_header->loh_attr) || !dt_object_exists(dt) ||
8297 dt_object_remote(dt_object_child(dt)))
8300 rc = lod_striping_load(env, lo);
8304 LASSERT(lo->ldo_comp_cnt > 0);
8306 rc = lod_layout_data_init(info, lo->ldo_comp_cnt);
8310 switch (lo->ldo_flr_state) {
8312 rc = lod_declare_update_plain(env, lo, mlc->mlc_intent,
8316 rc = lod_declare_update_rdonly(env, lo, mlc, th);
8318 case LCM_FL_WRITE_PENDING:
8319 rc = lod_declare_update_write_pending(env, lo, mlc, th);
8321 case LCM_FL_SYNC_PENDING:
8322 rc = lod_declare_update_sync_pending(env, lo, mlc, th);
8333 * Instantiate layout component objects which covers the intent write offset.
8335 static int lod_layout_change(const struct lu_env *env, struct dt_object *dt,
8336 struct md_layout_change *mlc, struct thandle *th)
8338 struct lu_attr *attr = &lod_env_info(env)->lti_attr;
8339 struct lu_attr *layout_attr = &lod_env_info(env)->lti_layout_attr;
8340 struct lod_object *lo = lod_dt_obj(dt);
8345 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
8346 LASSERT(dir_mlc_ops[mlc->mlc_opc]);
8347 rc = dir_mlc_ops[mlc->mlc_opc](env, dt, mlc, th);
8351 rc = lod_striped_create(env, dt, attr, NULL, th);
8352 if (!rc && layout_attr->la_valid & LA_LAYOUT_VERSION) {
8353 layout_attr->la_layout_version |= lo->ldo_layout_gen;
8354 rc = lod_attr_set(env, dt, layout_attr, th);
8360 struct dt_object_operations lod_obj_ops = {
8361 .do_read_lock = lod_read_lock,
8362 .do_write_lock = lod_write_lock,
8363 .do_read_unlock = lod_read_unlock,
8364 .do_write_unlock = lod_write_unlock,
8365 .do_write_locked = lod_write_locked,
8366 .do_attr_get = lod_attr_get,
8367 .do_declare_attr_set = lod_declare_attr_set,
8368 .do_attr_set = lod_attr_set,
8369 .do_xattr_get = lod_xattr_get,
8370 .do_declare_xattr_set = lod_declare_xattr_set,
8371 .do_xattr_set = lod_xattr_set,
8372 .do_declare_xattr_del = lod_declare_xattr_del,
8373 .do_xattr_del = lod_xattr_del,
8374 .do_xattr_list = lod_xattr_list,
8375 .do_ah_init = lod_ah_init,
8376 .do_declare_create = lod_declare_create,
8377 .do_create = lod_create,
8378 .do_declare_destroy = lod_declare_destroy,
8379 .do_destroy = lod_destroy,
8380 .do_index_try = lod_index_try,
8381 .do_declare_ref_add = lod_declare_ref_add,
8382 .do_ref_add = lod_ref_add,
8383 .do_declare_ref_del = lod_declare_ref_del,
8384 .do_ref_del = lod_ref_del,
8385 .do_object_sync = lod_object_sync,
8386 .do_object_lock = lod_object_lock,
8387 .do_object_unlock = lod_object_unlock,
8388 .do_invalidate = lod_invalidate,
8389 .do_declare_layout_change = lod_declare_layout_change,
8390 .do_layout_change = lod_layout_change,
8394 * Implementation of dt_body_operations::dbo_read.
8396 * \see dt_body_operations::dbo_read() in the API description for details.
8398 static ssize_t lod_read(const struct lu_env *env, struct dt_object *dt,
8399 struct lu_buf *buf, loff_t *pos)
8401 struct dt_object *next = dt_object_child(dt);
8403 LASSERT(S_ISREG(dt->do_lu.lo_header->loh_attr) ||
8404 S_ISLNK(dt->do_lu.lo_header->loh_attr));
8405 return next->do_body_ops->dbo_read(env, next, buf, pos);
8409 * Implementation of dt_body_operations::dbo_declare_write.
8411 * \see dt_body_operations::dbo_declare_write() in the API description
8414 static ssize_t lod_declare_write(const struct lu_env *env,
8415 struct dt_object *dt,
8416 const struct lu_buf *buf, loff_t pos,
8419 return lod_sub_declare_write(env, dt_object_child(dt), buf, pos, th);
8423 * Implementation of dt_body_operations::dbo_write.
8425 * \see dt_body_operations::dbo_write() in the API description for details.
8427 static ssize_t lod_write(const struct lu_env *env, struct dt_object *dt,
8428 const struct lu_buf *buf, loff_t *pos,
8431 LASSERT(S_ISREG(dt->do_lu.lo_header->loh_attr) ||
8432 S_ISLNK(dt->do_lu.lo_header->loh_attr));
8433 return lod_sub_write(env, dt_object_child(dt), buf, pos, th);
8436 static int lod_declare_punch(const struct lu_env *env, struct dt_object *dt,
8437 __u64 start, __u64 end, struct thandle *th)
8439 if (dt_object_remote(dt))
8442 return lod_sub_declare_punch(env, dt_object_child(dt), start, end, th);
8445 static int lod_punch(const struct lu_env *env, struct dt_object *dt,
8446 __u64 start, __u64 end, struct thandle *th)
8448 if (dt_object_remote(dt))
8451 LASSERT(S_ISREG(dt->do_lu.lo_header->loh_attr));
8452 return lod_sub_punch(env, dt_object_child(dt), start, end, th);
8456 * different type of files use the same body_ops because object may be created
8457 * in OUT, where there is no chance to set correct body_ops for each type, so
8458 * body_ops themselves will check file type inside, see lod_read/write/punch for
8461 const struct dt_body_operations lod_body_ops = {
8462 .dbo_read = lod_read,
8463 .dbo_declare_write = lod_declare_write,
8464 .dbo_write = lod_write,
8465 .dbo_declare_punch = lod_declare_punch,
8466 .dbo_punch = lod_punch,
8470 * Implementation of lu_object_operations::loo_object_init.
8472 * The function determines the type and the index of the target device using
8473 * sequence of the object's FID. Then passes control down to the
8474 * corresponding device:
8475 * OSD for the local objects, OSP for remote
8477 * \see lu_object_operations::loo_object_init() in the API description
8480 static int lod_object_init(const struct lu_env *env, struct lu_object *lo,
8481 const struct lu_object_conf *conf)
8483 struct lod_device *lod = lu2lod_dev(lo->lo_dev);
8484 struct lu_device *cdev = NULL;
8485 struct lu_object *cobj;
8486 struct lod_tgt_descs *ltd = NULL;
8487 struct lod_tgt_desc *tgt;
8489 int type = LU_SEQ_RANGE_ANY;
8493 rc = lod_fld_lookup(env, lod, lu_object_fid(lo), &idx, &type);
8497 if (type == LU_SEQ_RANGE_MDT &&
8498 idx == lu_site2seq(lo->lo_dev->ld_site)->ss_node_id) {
8499 cdev = &lod->lod_child->dd_lu_dev;
8500 } else if (type == LU_SEQ_RANGE_MDT) {
8501 ltd = &lod->lod_mdt_descs;
8503 } else if (type == LU_SEQ_RANGE_OST) {
8504 ltd = &lod->lod_ost_descs;
8511 if (ltd->ltd_tgts_size > idx &&
8512 cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx)) {
8513 tgt = LTD_TGT(ltd, idx);
8515 LASSERT(tgt != NULL);
8516 LASSERT(tgt->ltd_tgt != NULL);
8518 cdev = &(tgt->ltd_tgt->dd_lu_dev);
8520 lod_putref(lod, ltd);
8523 if (unlikely(cdev == NULL))
8526 cobj = cdev->ld_ops->ldo_object_alloc(env, lo->lo_header, cdev);
8527 if (unlikely(cobj == NULL))
8530 lu2lod_obj(lo)->ldo_obj.do_body_ops = &lod_body_ops;
8532 lu_object_add(lo, cobj);
8539 * Alloc cached foreign LOV
8541 * \param[in] lo object
8542 * \param[in] size size of foreign LOV
8544 * \retval 0 on success
8545 * \retval negative if failed
8547 int lod_alloc_foreign_lov(struct lod_object *lo, size_t size)
8549 OBD_ALLOC_LARGE(lo->ldo_foreign_lov, size);
8550 if (lo->ldo_foreign_lov == NULL)
8552 lo->ldo_foreign_lov_size = size;
8553 lo->ldo_is_foreign = 1;
8559 * Free cached foreign LOV
8561 * \param[in] lo object
8563 void lod_free_foreign_lov(struct lod_object *lo)
8565 if (lo->ldo_foreign_lov != NULL)
8566 OBD_FREE_LARGE(lo->ldo_foreign_lov, lo->ldo_foreign_lov_size);
8567 lo->ldo_foreign_lov = NULL;
8568 lo->ldo_foreign_lov_size = 0;
8569 lo->ldo_is_foreign = 0;
8574 * Free cached foreign LMV
8576 * \param[in] lo object
8578 void lod_free_foreign_lmv(struct lod_object *lo)
8580 if (lo->ldo_foreign_lmv != NULL)
8581 OBD_FREE_LARGE(lo->ldo_foreign_lmv, lo->ldo_foreign_lmv_size);
8582 lo->ldo_foreign_lmv = NULL;
8583 lo->ldo_foreign_lmv_size = 0;
8584 lo->ldo_dir_is_foreign = 0;
8589 * Release resources associated with striping.
8591 * If the object is striped (regular or directory), then release
8592 * the stripe objects references and free the ldo_stripe array.
8594 * \param[in] env execution environment
8595 * \param[in] lo object
8597 void lod_striping_free_nolock(const struct lu_env *env, struct lod_object *lo)
8599 struct lod_layout_component *lod_comp;
8602 if (unlikely(lo->ldo_is_foreign)) {
8603 lod_free_foreign_lov(lo);
8604 lo->ldo_comp_cached = 0;
8605 } else if (unlikely(lo->ldo_dir_is_foreign)) {
8606 lod_free_foreign_lmv(lo);
8607 lo->ldo_dir_stripe_loaded = 0;
8608 } else if (lo->ldo_stripe != NULL) {
8609 LASSERT(lo->ldo_comp_entries == NULL);
8610 LASSERT(lo->ldo_dir_stripes_allocated > 0);
8612 for (i = 0; i < lo->ldo_dir_stripe_count; i++) {
8613 if (lo->ldo_stripe[i])
8614 dt_object_put(env, lo->ldo_stripe[i]);
8617 j = sizeof(struct dt_object *) * lo->ldo_dir_stripes_allocated;
8618 OBD_FREE(lo->ldo_stripe, j);
8619 lo->ldo_stripe = NULL;
8620 lo->ldo_dir_stripes_allocated = 0;
8621 lo->ldo_dir_stripe_loaded = 0;
8622 lo->ldo_dir_stripe_count = 0;
8623 } else if (lo->ldo_comp_entries != NULL) {
8624 for (i = 0; i < lo->ldo_comp_cnt; i++) {
8625 /* free lod_layout_component::llc_stripe array */
8626 lod_comp = &lo->ldo_comp_entries[i];
8628 if (lod_comp->llc_stripe == NULL)
8630 LASSERT(lod_comp->llc_stripes_allocated != 0);
8631 for (j = 0; j < lod_comp->llc_stripes_allocated; j++) {
8632 if (lod_comp->llc_stripe[j] != NULL)
8634 &lod_comp->llc_stripe[j]->do_lu);
8636 OBD_FREE(lod_comp->llc_stripe,
8637 sizeof(struct dt_object *) *
8638 lod_comp->llc_stripes_allocated);
8639 lod_comp->llc_stripe = NULL;
8640 OBD_FREE(lod_comp->llc_ost_indices,
8642 lod_comp->llc_stripes_allocated);
8643 lod_comp->llc_ost_indices = NULL;
8644 lod_comp->llc_stripes_allocated = 0;
8646 lod_free_comp_entries(lo);
8647 lo->ldo_comp_cached = 0;
8651 void lod_striping_free(const struct lu_env *env, struct lod_object *lo)
8653 mutex_lock(&lo->ldo_layout_mutex);
8654 lod_striping_free_nolock(env, lo);
8655 mutex_unlock(&lo->ldo_layout_mutex);
8659 * Implementation of lu_object_operations::loo_object_free.
8661 * \see lu_object_operations::loo_object_free() in the API description
8664 static void lod_object_free(const struct lu_env *env, struct lu_object *o)
8666 struct lod_object *lo = lu2lod_obj(o);
8668 /* release all underlying object pinned */
8669 lod_striping_free(env, lo);
8671 /* lo doesn't contain a lu_object_header, so we don't need call_rcu */
8672 OBD_SLAB_FREE_PTR(lo, lod_object_kmem);
8676 * Implementation of lu_object_operations::loo_object_release.
8678 * \see lu_object_operations::loo_object_release() in the API description
8681 static void lod_object_release(const struct lu_env *env, struct lu_object *o)
8683 /* XXX: shouldn't we release everything here in case if object
8684 * creation failed before? */
8688 * Implementation of lu_object_operations::loo_object_print.
8690 * \see lu_object_operations::loo_object_print() in the API description
8693 static int lod_object_print(const struct lu_env *env, void *cookie,
8694 lu_printer_t p, const struct lu_object *l)
8696 struct lod_object *o = lu2lod_obj((struct lu_object *) l);
8698 return (*p)(env, cookie, LUSTRE_LOD_NAME"-object@%p", o);
8701 struct lu_object_operations lod_lu_obj_ops = {
8702 .loo_object_init = lod_object_init,
8703 .loo_object_free = lod_object_free,
8704 .loo_object_release = lod_object_release,
8705 .loo_object_print = lod_object_print,