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, 2014, 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 * lustre/doc/osd-api.txt.
38 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
41 #define DEBUG_SUBSYSTEM S_MDS
44 #include <obd_class.h>
45 #include <lustre_ver.h>
46 #include <obd_support.h>
47 #include <lprocfs_status.h>
49 #include <lustre_fid.h>
50 #include <lustre_param.h>
51 #include <lustre_fid.h>
52 #include <lustre_lmv.h>
53 #include <md_object.h>
54 #include <lustre_linkea.h>
56 #include "lod_internal.h"
58 static const char dot[] = ".";
59 static const char dotdot[] = "..";
61 static const struct dt_body_operations lod_body_lnk_ops;
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_index_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_index_insert(const struct lu_env *env,
87 const struct dt_rec *rec,
88 const struct dt_key *key,
91 return lod_sub_object_declare_insert(env, dt_object_child(dt),
96 * Implementation of dt_index_operations::dio_insert.
98 * Used with regular (non-striped) objects
100 * \see dt_index_operations::dio_insert() in the API description for details.
102 static int lod_index_insert(const struct lu_env *env,
103 struct dt_object *dt,
104 const struct dt_rec *rec,
105 const struct dt_key *key,
109 return lod_sub_object_index_insert(env, dt_object_child(dt), rec, key,
114 * Implementation of dt_index_operations::dio_declare_delete.
116 * Used with regular (non-striped) objects.
118 * \see dt_index_operations::dio_declare_delete() in the API description
121 static int lod_declare_index_delete(const struct lu_env *env,
122 struct dt_object *dt,
123 const struct dt_key *key,
126 return lod_sub_object_declare_delete(env, dt_object_child(dt), key,
131 * Implementation of dt_index_operations::dio_delete.
133 * Used with regular (non-striped) objects.
135 * \see dt_index_operations::dio_delete() in the API description for details.
137 static int lod_index_delete(const struct lu_env *env,
138 struct dt_object *dt,
139 const struct dt_key *key,
142 return lod_sub_object_delete(env, dt_object_child(dt), key, th);
146 * Implementation of dt_it_ops::init.
148 * Used with regular (non-striped) objects.
150 * \see dt_it_ops::init() in the API description for details.
152 static struct dt_it *lod_it_init(const struct lu_env *env,
153 struct dt_object *dt, __u32 attr)
155 struct dt_object *next = dt_object_child(dt);
156 struct lod_it *it = &lod_env_info(env)->lti_it;
157 struct dt_it *it_next;
159 it_next = next->do_index_ops->dio_it.init(env, next, attr);
163 /* currently we do not use more than one iterator per thread
164 * so we store it in thread info. if at some point we need
165 * more active iterators in a single thread, we can allocate
167 LASSERT(it->lit_obj == NULL);
169 it->lit_it = it_next;
172 return (struct dt_it *)it;
175 #define LOD_CHECK_IT(env, it) \
177 LASSERT((it)->lit_obj != NULL); \
178 LASSERT((it)->lit_it != NULL); \
182 * Implementation of dt_index_operations::dio_it.fini.
184 * Used with regular (non-striped) objects.
186 * \see dt_index_operations::dio_it.fini() in the API description for details.
188 static void lod_it_fini(const struct lu_env *env, struct dt_it *di)
190 struct lod_it *it = (struct lod_it *)di;
192 LOD_CHECK_IT(env, it);
193 it->lit_obj->do_index_ops->dio_it.fini(env, it->lit_it);
195 /* the iterator not in use any more */
201 * Implementation of dt_it_ops::get.
203 * Used with regular (non-striped) objects.
205 * \see dt_it_ops::get() in the API description for details.
207 static int lod_it_get(const struct lu_env *env, struct dt_it *di,
208 const struct dt_key *key)
210 const struct lod_it *it = (const struct lod_it *)di;
212 LOD_CHECK_IT(env, it);
213 return it->lit_obj->do_index_ops->dio_it.get(env, it->lit_it, key);
217 * Implementation of dt_it_ops::put.
219 * Used with regular (non-striped) objects.
221 * \see dt_it_ops::put() in the API description for details.
223 static void lod_it_put(const struct lu_env *env, struct dt_it *di)
225 struct lod_it *it = (struct lod_it *)di;
227 LOD_CHECK_IT(env, it);
228 return it->lit_obj->do_index_ops->dio_it.put(env, it->lit_it);
232 * Implementation of dt_it_ops::next.
234 * Used with regular (non-striped) objects
236 * \see dt_it_ops::next() in the API description for details.
238 static int lod_it_next(const struct lu_env *env, struct dt_it *di)
240 struct lod_it *it = (struct lod_it *)di;
242 LOD_CHECK_IT(env, it);
243 return it->lit_obj->do_index_ops->dio_it.next(env, it->lit_it);
247 * Implementation of dt_it_ops::key.
249 * Used with regular (non-striped) objects.
251 * \see dt_it_ops::key() in the API description for details.
253 static struct dt_key *lod_it_key(const struct lu_env *env,
254 const struct dt_it *di)
256 const struct lod_it *it = (const struct lod_it *)di;
258 LOD_CHECK_IT(env, it);
259 return it->lit_obj->do_index_ops->dio_it.key(env, it->lit_it);
263 * Implementation of dt_it_ops::key_size.
265 * Used with regular (non-striped) objects.
267 * \see dt_it_ops::key_size() in the API description for details.
269 static int lod_it_key_size(const struct lu_env *env, const struct dt_it *di)
271 struct lod_it *it = (struct lod_it *)di;
273 LOD_CHECK_IT(env, it);
274 return it->lit_obj->do_index_ops->dio_it.key_size(env, it->lit_it);
278 * Implementation of dt_it_ops::rec.
280 * Used with regular (non-striped) objects.
282 * \see dt_it_ops::rec() in the API description for details.
284 static int lod_it_rec(const struct lu_env *env, const struct dt_it *di,
285 struct dt_rec *rec, __u32 attr)
287 const struct lod_it *it = (const struct lod_it *)di;
289 LOD_CHECK_IT(env, it);
290 return it->lit_obj->do_index_ops->dio_it.rec(env, it->lit_it, rec,
295 * Implementation of dt_it_ops::rec_size.
297 * Used with regular (non-striped) objects.
299 * \see dt_it_ops::rec_size() in the API description for details.
301 static int lod_it_rec_size(const struct lu_env *env, const struct dt_it *di,
304 const struct lod_it *it = (const struct lod_it *)di;
306 LOD_CHECK_IT(env, it);
307 return it->lit_obj->do_index_ops->dio_it.rec_size(env, it->lit_it,
312 * Implementation of dt_it_ops::store.
314 * Used with regular (non-striped) objects.
316 * \see dt_it_ops::store() in the API description for details.
318 static __u64 lod_it_store(const struct lu_env *env, const struct dt_it *di)
320 const struct lod_it *it = (const struct lod_it *)di;
322 LOD_CHECK_IT(env, it);
323 return it->lit_obj->do_index_ops->dio_it.store(env, it->lit_it);
327 * Implementation of dt_it_ops::load.
329 * Used with regular (non-striped) objects.
331 * \see dt_it_ops::load() in the API description for details.
333 static int lod_it_load(const struct lu_env *env, const struct dt_it *di,
336 const struct lod_it *it = (const struct lod_it *)di;
338 LOD_CHECK_IT(env, it);
339 return it->lit_obj->do_index_ops->dio_it.load(env, it->lit_it, hash);
343 * Implementation of dt_it_ops::key_rec.
345 * Used with regular (non-striped) objects.
347 * \see dt_it_ops::rec() in the API description for details.
349 static int lod_it_key_rec(const struct lu_env *env, const struct dt_it *di,
352 const struct lod_it *it = (const struct lod_it *)di;
354 LOD_CHECK_IT(env, it);
355 return it->lit_obj->do_index_ops->dio_it.key_rec(env, it->lit_it,
359 static struct dt_index_operations lod_index_ops = {
360 .dio_lookup = lod_index_lookup,
361 .dio_declare_insert = lod_declare_index_insert,
362 .dio_insert = lod_index_insert,
363 .dio_declare_delete = lod_declare_index_delete,
364 .dio_delete = lod_index_delete,
372 .key_size = lod_it_key_size,
374 .rec_size = lod_it_rec_size,
375 .store = lod_it_store,
377 .key_rec = lod_it_key_rec,
382 * Implementation of dt_it_ops::init.
384 * Used with striped objects. Internally just initializes the iterator
385 * on the first stripe.
387 * \see dt_it_ops::init() in the API description for details.
389 static struct dt_it *lod_striped_it_init(const struct lu_env *env,
390 struct dt_object *dt, __u32 attr)
392 struct lod_object *lo = lod_dt_obj(dt);
393 struct dt_object *next;
394 struct lod_it *it = &lod_env_info(env)->lti_it;
395 struct dt_it *it_next;
398 LASSERT(lo->ldo_stripenr > 0);
399 next = lo->ldo_stripe[0];
400 LASSERT(next != NULL);
401 LASSERT(next->do_index_ops != NULL);
403 it_next = next->do_index_ops->dio_it.init(env, next, attr);
407 /* currently we do not use more than one iterator per thread
408 * so we store it in thread info. if at some point we need
409 * more active iterators in a single thread, we can allocate
411 LASSERT(it->lit_obj == NULL);
413 it->lit_stripe_index = 0;
415 it->lit_it = it_next;
418 return (struct dt_it *)it;
421 #define LOD_CHECK_STRIPED_IT(env, it, lo) \
423 LASSERT((it)->lit_obj != NULL); \
424 LASSERT((it)->lit_it != NULL); \
425 LASSERT((lo)->ldo_stripenr > 0); \
426 LASSERT((it)->lit_stripe_index < (lo)->ldo_stripenr); \
430 * Implementation of dt_it_ops::fini.
432 * Used with striped objects.
434 * \see dt_it_ops::fini() in the API description for details.
436 static void lod_striped_it_fini(const struct lu_env *env, struct dt_it *di)
438 struct lod_it *it = (struct lod_it *)di;
439 struct lod_object *lo = lod_dt_obj(it->lit_obj);
440 struct dt_object *next;
442 LOD_CHECK_STRIPED_IT(env, it, lo);
444 next = lo->ldo_stripe[it->lit_stripe_index];
445 LASSERT(next != NULL);
446 LASSERT(next->do_index_ops != NULL);
448 next->do_index_ops->dio_it.fini(env, it->lit_it);
450 /* the iterator not in use any more */
453 it->lit_stripe_index = 0;
457 * Implementation of dt_it_ops::get.
459 * Right now it's not used widely, only to reset the iterator to the
460 * initial position. It should be possible to implement a full version
461 * which chooses a correct stripe to be able to position with any key.
463 * \see dt_it_ops::get() in the API description for details.
465 static int lod_striped_it_get(const struct lu_env *env, struct dt_it *di,
466 const struct dt_key *key)
468 const struct lod_it *it = (const struct lod_it *)di;
469 struct lod_object *lo = lod_dt_obj(it->lit_obj);
470 struct dt_object *next;
473 LOD_CHECK_STRIPED_IT(env, it, lo);
475 next = lo->ldo_stripe[it->lit_stripe_index];
476 LASSERT(next != NULL);
477 LASSERT(next->do_index_ops != NULL);
479 return next->do_index_ops->dio_it.get(env, it->lit_it, key);
483 * Implementation of dt_it_ops::put.
485 * Used with striped objects.
487 * \see dt_it_ops::put() in the API description for details.
489 static void lod_striped_it_put(const struct lu_env *env, struct dt_it *di)
491 struct lod_it *it = (struct lod_it *)di;
492 struct lod_object *lo = lod_dt_obj(it->lit_obj);
493 struct dt_object *next;
495 LOD_CHECK_STRIPED_IT(env, it, lo);
497 next = lo->ldo_stripe[it->lit_stripe_index];
498 LASSERT(next != NULL);
499 LASSERT(next->do_index_ops != NULL);
501 return next->do_index_ops->dio_it.put(env, it->lit_it);
505 * Implementation of dt_it_ops::next.
507 * Used with striped objects. When the end of the current stripe is
508 * reached, the method takes the next stripe's iterator.
510 * \see dt_it_ops::next() in the API description for details.
512 static int lod_striped_it_next(const struct lu_env *env, struct dt_it *di)
514 struct lod_it *it = (struct lod_it *)di;
515 struct lod_object *lo = lod_dt_obj(it->lit_obj);
516 struct dt_object *next;
517 struct dt_it *it_next;
521 LOD_CHECK_STRIPED_IT(env, it, lo);
523 next = lo->ldo_stripe[it->lit_stripe_index];
524 LASSERT(next != NULL);
525 LASSERT(next->do_index_ops != NULL);
527 rc = next->do_index_ops->dio_it.next(env, it->lit_it);
531 if (rc == 0 && it->lit_stripe_index == 0)
534 if (rc == 0 && it->lit_stripe_index > 0) {
535 struct lu_dirent *ent;
537 ent = (struct lu_dirent *)lod_env_info(env)->lti_key;
539 rc = next->do_index_ops->dio_it.rec(env, it->lit_it,
540 (struct dt_rec *)ent,
545 /* skip . and .. for slave stripe */
546 if ((strncmp(ent->lde_name, ".",
547 le16_to_cpu(ent->lde_namelen)) == 0 &&
548 le16_to_cpu(ent->lde_namelen) == 1) ||
549 (strncmp(ent->lde_name, "..",
550 le16_to_cpu(ent->lde_namelen)) == 0 &&
551 le16_to_cpu(ent->lde_namelen) == 2))
557 /* go to next stripe */
558 if (it->lit_stripe_index + 1 >= lo->ldo_stripenr)
561 it->lit_stripe_index++;
563 next->do_index_ops->dio_it.put(env, it->lit_it);
564 next->do_index_ops->dio_it.fini(env, it->lit_it);
566 rc = next->do_ops->do_index_try(env, next, &dt_directory_features);
570 next = lo->ldo_stripe[it->lit_stripe_index];
571 LASSERT(next != NULL);
572 LASSERT(next->do_index_ops != NULL);
574 it_next = next->do_index_ops->dio_it.init(env, next, it->lit_attr);
575 if (!IS_ERR(it_next)) {
576 it->lit_it = it_next;
579 rc = PTR_ERR(it_next);
586 * Implementation of dt_it_ops::key.
588 * Used with striped objects.
590 * \see dt_it_ops::key() in the API description for details.
592 static struct dt_key *lod_striped_it_key(const struct lu_env *env,
593 const struct dt_it *di)
595 const struct lod_it *it = (const struct lod_it *)di;
596 struct lod_object *lo = lod_dt_obj(it->lit_obj);
597 struct dt_object *next;
599 LOD_CHECK_STRIPED_IT(env, it, lo);
601 next = lo->ldo_stripe[it->lit_stripe_index];
602 LASSERT(next != NULL);
603 LASSERT(next->do_index_ops != NULL);
605 return next->do_index_ops->dio_it.key(env, it->lit_it);
609 * Implementation of dt_it_ops::key_size.
611 * Used with striped objects.
613 * \see dt_it_ops::size() in the API description for details.
615 static int lod_striped_it_key_size(const struct lu_env *env,
616 const struct dt_it *di)
618 struct lod_it *it = (struct lod_it *)di;
619 struct lod_object *lo = lod_dt_obj(it->lit_obj);
620 struct dt_object *next;
622 LOD_CHECK_STRIPED_IT(env, it, lo);
624 next = lo->ldo_stripe[it->lit_stripe_index];
625 LASSERT(next != NULL);
626 LASSERT(next->do_index_ops != NULL);
628 return next->do_index_ops->dio_it.key_size(env, it->lit_it);
632 * Implementation of dt_it_ops::rec.
634 * Used with striped objects.
636 * \see dt_it_ops::rec() in the API description for details.
638 static int lod_striped_it_rec(const struct lu_env *env, const struct dt_it *di,
639 struct dt_rec *rec, __u32 attr)
641 const struct lod_it *it = (const struct lod_it *)di;
642 struct lod_object *lo = lod_dt_obj(it->lit_obj);
643 struct dt_object *next;
645 LOD_CHECK_STRIPED_IT(env, it, lo);
647 next = lo->ldo_stripe[it->lit_stripe_index];
648 LASSERT(next != NULL);
649 LASSERT(next->do_index_ops != NULL);
651 return next->do_index_ops->dio_it.rec(env, it->lit_it, rec, attr);
655 * Implementation of dt_it_ops::rec_size.
657 * Used with striped objects.
659 * \see dt_it_ops::rec_size() in the API description for details.
661 static int lod_striped_it_rec_size(const struct lu_env *env,
662 const struct dt_it *di, __u32 attr)
664 struct lod_it *it = (struct lod_it *)di;
665 struct lod_object *lo = lod_dt_obj(it->lit_obj);
666 struct dt_object *next;
668 LOD_CHECK_STRIPED_IT(env, it, lo);
670 next = lo->ldo_stripe[it->lit_stripe_index];
671 LASSERT(next != NULL);
672 LASSERT(next->do_index_ops != NULL);
674 return next->do_index_ops->dio_it.rec_size(env, it->lit_it, attr);
678 * Implementation of dt_it_ops::store.
680 * Used with striped objects.
682 * \see dt_it_ops::store() in the API description for details.
684 static __u64 lod_striped_it_store(const struct lu_env *env,
685 const struct dt_it *di)
687 const struct lod_it *it = (const struct lod_it *)di;
688 struct lod_object *lo = lod_dt_obj(it->lit_obj);
689 struct dt_object *next;
691 LOD_CHECK_STRIPED_IT(env, it, lo);
693 next = lo->ldo_stripe[it->lit_stripe_index];
694 LASSERT(next != NULL);
695 LASSERT(next->do_index_ops != NULL);
697 return next->do_index_ops->dio_it.store(env, it->lit_it);
701 * Implementation of dt_it_ops::load.
703 * Used with striped objects.
705 * \see dt_it_ops::load() in the API description for details.
707 static int lod_striped_it_load(const struct lu_env *env,
708 const struct dt_it *di, __u64 hash)
710 const struct lod_it *it = (const struct lod_it *)di;
711 struct lod_object *lo = lod_dt_obj(it->lit_obj);
712 struct dt_object *next;
714 LOD_CHECK_STRIPED_IT(env, it, lo);
716 next = lo->ldo_stripe[it->lit_stripe_index];
717 LASSERT(next != NULL);
718 LASSERT(next->do_index_ops != NULL);
720 return next->do_index_ops->dio_it.load(env, it->lit_it, hash);
723 static struct dt_index_operations lod_striped_index_ops = {
724 .dio_lookup = lod_index_lookup,
725 .dio_declare_insert = lod_declare_index_insert,
726 .dio_insert = lod_index_insert,
727 .dio_declare_delete = lod_declare_index_delete,
728 .dio_delete = lod_index_delete,
730 .init = lod_striped_it_init,
731 .fini = lod_striped_it_fini,
732 .get = lod_striped_it_get,
733 .put = lod_striped_it_put,
734 .next = lod_striped_it_next,
735 .key = lod_striped_it_key,
736 .key_size = lod_striped_it_key_size,
737 .rec = lod_striped_it_rec,
738 .rec_size = lod_striped_it_rec_size,
739 .store = lod_striped_it_store,
740 .load = lod_striped_it_load,
745 * Append the FID for each shard of the striped directory after the
746 * given LMV EA header.
748 * To simplify striped directory and the consistency verification,
749 * we only store the LMV EA header on disk, for both master object
750 * and slave objects. When someone wants to know the whole LMV EA,
751 * such as client readdir(), we can build the entrie LMV EA on the
752 * MDT side (in RAM) via iterating the sub-directory entries that
753 * are contained in the master object of the stripe directory.
755 * For the master object of the striped directroy, the valid name
756 * for each shard is composed of the ${shard_FID}:${shard_idx}.
758 * There may be holes in the LMV EA if some shards' name entries
759 * are corrupted or lost.
761 * \param[in] env pointer to the thread context
762 * \param[in] lo pointer to the master object of the striped directory
763 * \param[in] buf pointer to the lu_buf which will hold the LMV EA
764 * \param[in] resize whether re-allocate the buffer if it is not big enough
766 * \retval positive size of the LMV EA
767 * \retval 0 for nothing to be loaded
768 * \retval negative error number on failure
770 int lod_load_lmv_shards(const struct lu_env *env, struct lod_object *lo,
771 struct lu_buf *buf, bool resize)
773 struct lu_dirent *ent =
774 (struct lu_dirent *)lod_env_info(env)->lti_key;
775 struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
776 struct dt_object *obj = dt_object_child(&lo->ldo_obj);
777 struct lmv_mds_md_v1 *lmv1 = buf->lb_buf;
779 const struct dt_it_ops *iops;
781 __u32 magic = le32_to_cpu(lmv1->lmv_magic);
786 /* If it is not a striped directory, then load nothing. */
787 if (magic != LMV_MAGIC_V1)
790 /* If it is in migration (or failure), then load nothing. */
791 if (le32_to_cpu(lmv1->lmv_hash_type) & LMV_HASH_FLAG_MIGRATION)
794 stripes = le32_to_cpu(lmv1->lmv_stripe_count);
798 rc = lmv_mds_md_size(stripes, magic);
802 if (buf->lb_len < lmv1_size) {
811 lu_buf_alloc(buf, lmv1_size);
816 memcpy(buf->lb_buf, tbuf.lb_buf, tbuf.lb_len);
819 if (unlikely(!dt_try_as_dir(env, obj)))
822 memset(&lmv1->lmv_stripe_fids[0], 0, stripes * sizeof(struct lu_fid));
823 iops = &obj->do_index_ops->dio_it;
824 it = iops->init(env, obj, LUDA_64BITHASH);
828 rc = iops->load(env, it, 0);
830 rc = iops->next(env, it);
835 char name[FID_LEN + 2] = "";
840 rc = iops->rec(env, it, (struct dt_rec *)ent, LUDA_64BITHASH);
846 fid_le_to_cpu(&fid, &ent->lde_fid);
847 ent->lde_namelen = le16_to_cpu(ent->lde_namelen);
848 if (ent->lde_name[0] == '.') {
849 if (ent->lde_namelen == 1)
852 if (ent->lde_namelen == 2 && ent->lde_name[1] == '.')
856 len = snprintf(name, sizeof(name),
857 DFID":", PFID(&ent->lde_fid));
858 /* The ent->lde_name is composed of ${FID}:${index} */
859 if (ent->lde_namelen < len + 1 ||
860 memcmp(ent->lde_name, name, len) != 0) {
861 CDEBUG(lod->lod_lmv_failout ? D_ERROR : D_INFO,
862 "%s: invalid shard name %.*s with the FID "DFID
863 " for the striped directory "DFID", %s\n",
864 lod2obd(lod)->obd_name, ent->lde_namelen,
865 ent->lde_name, PFID(&fid),
866 PFID(lu_object_fid(&obj->do_lu)),
867 lod->lod_lmv_failout ? "failout" : "skip");
869 if (lod->lod_lmv_failout)
877 if (ent->lde_name[len] < '0' ||
878 ent->lde_name[len] > '9') {
879 CDEBUG(lod->lod_lmv_failout ? D_ERROR : D_INFO,
880 "%s: invalid shard name %.*s with the "
881 "FID "DFID" for the striped directory "
883 lod2obd(lod)->obd_name, ent->lde_namelen,
884 ent->lde_name, PFID(&fid),
885 PFID(lu_object_fid(&obj->do_lu)),
886 lod->lod_lmv_failout ?
889 if (lod->lod_lmv_failout)
895 index = index * 10 + ent->lde_name[len++] - '0';
896 } while (len < ent->lde_namelen);
898 if (len == ent->lde_namelen) {
899 /* Out of LMV EA range. */
900 if (index >= stripes) {
901 CERROR("%s: the shard %.*s for the striped "
902 "directory "DFID" is out of the known "
903 "LMV EA range [0 - %u], failout\n",
904 lod2obd(lod)->obd_name, ent->lde_namelen,
906 PFID(lu_object_fid(&obj->do_lu)),
912 /* The slot has been occupied. */
913 if (!fid_is_zero(&lmv1->lmv_stripe_fids[index])) {
917 &lmv1->lmv_stripe_fids[index]);
918 CERROR("%s: both the shard "DFID" and "DFID
919 " for the striped directory "DFID
920 " claim the same LMV EA slot at the "
921 "index %d, failout\n",
922 lod2obd(lod)->obd_name,
923 PFID(&fid0), PFID(&fid),
924 PFID(lu_object_fid(&obj->do_lu)), index);
929 /* stored as LE mode */
930 lmv1->lmv_stripe_fids[index] = ent->lde_fid;
933 rc = iops->next(env, it);
940 RETURN(rc > 0 ? lmv_mds_md_size(stripes, magic) : rc);
944 * Implementation of dt_object_operations::do_index_try.
946 * \see dt_object_operations::do_index_try() in the API description for details.
948 static int lod_index_try(const struct lu_env *env, struct dt_object *dt,
949 const struct dt_index_features *feat)
951 struct lod_object *lo = lod_dt_obj(dt);
952 struct dt_object *next = dt_object_child(dt);
956 LASSERT(next->do_ops);
957 LASSERT(next->do_ops->do_index_try);
959 rc = lod_load_striping_locked(env, lo);
963 rc = next->do_ops->do_index_try(env, next, feat);
967 if (lo->ldo_stripenr > 0) {
970 for (i = 0; i < lo->ldo_stripenr; i++) {
971 if (dt_object_exists(lo->ldo_stripe[i]) == 0)
973 rc = lo->ldo_stripe[i]->do_ops->do_index_try(env,
974 lo->ldo_stripe[i], feat);
978 dt->do_index_ops = &lod_striped_index_ops;
980 dt->do_index_ops = &lod_index_ops;
987 * Implementation of dt_object_operations::do_read_lock.
989 * \see dt_object_operations::do_read_lock() in the API description for details.
991 static void lod_object_read_lock(const struct lu_env *env,
992 struct dt_object *dt, unsigned role)
994 dt_read_lock(env, dt_object_child(dt), role);
998 * Implementation of dt_object_operations::do_write_lock.
1000 * \see dt_object_operations::do_write_lock() in the API description for
1003 static void lod_object_write_lock(const struct lu_env *env,
1004 struct dt_object *dt, unsigned role)
1006 dt_write_lock(env, dt_object_child(dt), role);
1010 * Implementation of dt_object_operations::do_read_unlock.
1012 * \see dt_object_operations::do_read_unlock() in the API description for
1015 static void lod_object_read_unlock(const struct lu_env *env,
1016 struct dt_object *dt)
1018 dt_read_unlock(env, dt_object_child(dt));
1022 * Implementation of dt_object_operations::do_write_unlock.
1024 * \see dt_object_operations::do_write_unlock() in the API description for
1027 static void lod_object_write_unlock(const struct lu_env *env,
1028 struct dt_object *dt)
1030 dt_write_unlock(env, dt_object_child(dt));
1034 * Implementation of dt_object_operations::do_write_locked.
1036 * \see dt_object_operations::do_write_locked() in the API description for
1039 static int lod_object_write_locked(const struct lu_env *env,
1040 struct dt_object *dt)
1042 return dt_write_locked(env, dt_object_child(dt));
1046 * Implementation of dt_object_operations::do_attr_get.
1048 * \see dt_object_operations::do_attr_get() in the API description for details.
1050 static int lod_attr_get(const struct lu_env *env,
1051 struct dt_object *dt,
1052 struct lu_attr *attr)
1054 /* Note: for striped directory, client will merge attributes
1055 * from all of the sub-stripes see lmv_merge_attr(), and there
1056 * no MDD logic depend on directory nlink/size/time, so we can
1057 * always use master inode nlink and size for now. */
1058 return dt_attr_get(env, dt_object_child(dt), attr);
1062 * Mark all of the striped directory sub-stripes dead.
1064 * When a striped object is a subject to removal, we have
1065 * to mark all the stripes to prevent further access to
1066 * them (e.g. create a new file in those). So we mark
1067 * all the stripes with LMV_HASH_FLAG_DEAD. The function
1068 * can be used to declare the changes and to apply them.
1069 * If the object isn't striped, then just return success.
1071 * \param[in] env execution environment
1072 * \param[in] dt the striped object
1073 * \param[in] handle transaction handle
1074 * \param[in] declare whether to declare the change or apply
1076 * \retval 0 on success
1077 * \retval negative if failed
1079 static int lod_mark_dead_object(const struct lu_env *env,
1080 struct dt_object *dt,
1084 struct lod_object *lo = lod_dt_obj(dt);
1085 struct lmv_mds_md_v1 *lmv;
1086 __u32 dead_hash_type;
1092 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr))
1095 rc = lod_load_striping_locked(env, lo);
1099 if (lo->ldo_stripenr == 0)
1102 rc = lod_get_lmv_ea(env, lo);
1106 lmv = lod_env_info(env)->lti_ea_store;
1107 lmv->lmv_magic = cpu_to_le32(LMV_MAGIC_STRIPE);
1108 dead_hash_type = le32_to_cpu(lmv->lmv_hash_type) | LMV_HASH_FLAG_DEAD;
1109 lmv->lmv_hash_type = cpu_to_le32(dead_hash_type);
1110 for (i = 0; i < lo->ldo_stripenr; i++) {
1113 lmv->lmv_master_mdt_index = i;
1115 buf.lb_len = sizeof(*lmv);
1117 rc = lod_sub_object_declare_xattr_set(env,
1118 lo->ldo_stripe[i], &buf,
1120 LU_XATTR_REPLACE, th);
1122 rc = lod_sub_object_xattr_set(env, lo->ldo_stripe[i],
1123 &buf, XATTR_NAME_LMV,
1124 LU_XATTR_REPLACE, th);
1134 * Implementation of dt_object_operations::do_declare_attr_set.
1136 * If the object is striped, then apply the changes to all the stripes.
1138 * \see dt_object_operations::do_declare_attr_set() in the API description
1141 static int lod_declare_attr_set(const struct lu_env *env,
1142 struct dt_object *dt,
1143 const struct lu_attr *attr,
1146 struct dt_object *next = dt_object_child(dt);
1147 struct lod_object *lo = lod_dt_obj(dt);
1151 /* Set dead object on all other stripes */
1152 if (attr->la_valid & LA_FLAGS && !(attr->la_valid & ~LA_FLAGS) &&
1153 attr->la_flags & LUSTRE_SLAVE_DEAD_FL) {
1154 rc = lod_mark_dead_object(env, dt, th, true);
1159 * declare setattr on the local object
1161 rc = lod_sub_object_declare_attr_set(env, next, attr, th);
1165 /* osp_declare_attr_set() ignores all attributes other than
1166 * UID, GID, and size, and osp_attr_set() ignores all but UID
1167 * and GID. Declaration of size attr setting happens through
1168 * lod_declare_init_size(), and not through this function.
1169 * Therefore we need not load striping unless ownership is
1170 * changing. This should save memory and (we hope) speed up
1172 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
1173 if (!(attr->la_valid & (LA_UID | LA_GID)))
1176 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_OWNER))
1179 if (!(attr->la_valid & (LA_UID | LA_GID | LA_MODE |
1180 LA_ATIME | LA_MTIME | LA_CTIME |
1185 * load striping information, notice we don't do this when object
1186 * is being initialized as we don't need this information till
1187 * few specific cases like destroy, chown
1189 rc = lod_load_striping(env, lo);
1193 if (lo->ldo_stripenr == 0)
1197 * if object is striped declare changes on the stripes
1199 LASSERT(lo->ldo_stripe);
1200 for (i = 0; i < lo->ldo_stripenr; i++) {
1201 if (lo->ldo_stripe[i] == NULL)
1203 rc = lod_sub_object_declare_attr_set(env,
1204 lo->ldo_stripe[i], attr,
1210 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_STRIPE) &&
1211 dt_object_exists(next) != 0 &&
1212 dt_object_remote(next) == 0)
1213 lod_sub_object_declare_xattr_del(env, next,
1214 XATTR_NAME_LOV, th);
1216 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CHANGE_STRIPE) &&
1217 dt_object_exists(next) &&
1218 dt_object_remote(next) == 0 && S_ISREG(attr->la_mode)) {
1219 struct lod_thread_info *info = lod_env_info(env);
1220 struct lu_buf *buf = &info->lti_buf;
1222 buf->lb_buf = info->lti_ea_store;
1223 buf->lb_len = info->lti_ea_store_size;
1224 lod_sub_object_declare_xattr_set(env, next, buf,
1226 LU_XATTR_REPLACE, th);
1233 * Implementation of dt_object_operations::do_attr_set.
1235 * If the object is striped, then apply the changes to all or subset of
1236 * the stripes depending on the object type and specific attributes.
1238 * \see dt_object_operations::do_attr_set() in the API description for details.
1240 static int lod_attr_set(const struct lu_env *env,
1241 struct dt_object *dt,
1242 const struct lu_attr *attr,
1245 struct dt_object *next = dt_object_child(dt);
1246 struct lod_object *lo = lod_dt_obj(dt);
1250 /* Set dead object on all other stripes */
1251 if (attr->la_valid & LA_FLAGS && !(attr->la_valid & ~LA_FLAGS) &&
1252 attr->la_flags & LUSTRE_SLAVE_DEAD_FL) {
1253 rc = lod_mark_dead_object(env, dt, th, false);
1258 * apply changes to the local object
1260 rc = lod_sub_object_attr_set(env, next, attr, th);
1264 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
1265 if (!(attr->la_valid & (LA_UID | LA_GID)))
1268 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_OWNER))
1271 if (!(attr->la_valid & (LA_UID | LA_GID | LA_MODE |
1272 LA_ATIME | LA_MTIME | LA_CTIME |
1277 if (lo->ldo_stripenr == 0)
1281 * if object is striped, apply changes to all the stripes
1283 LASSERT(lo->ldo_stripe);
1284 for (i = 0; i < lo->ldo_stripenr; i++) {
1285 if (unlikely(lo->ldo_stripe[i] == NULL))
1288 if (S_ISDIR(dt->do_lu.lo_header->loh_attr) &&
1289 (dt_object_exists(lo->ldo_stripe[i]) == 0))
1292 rc = lod_sub_object_attr_set(env, lo->ldo_stripe[i], attr, th);
1297 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_STRIPE) &&
1298 dt_object_exists(next) != 0 &&
1299 dt_object_remote(next) == 0)
1300 rc = lod_sub_object_xattr_del(env, next, XATTR_NAME_LOV, th);
1302 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_CHANGE_STRIPE) &&
1303 dt_object_exists(next) &&
1304 dt_object_remote(next) == 0 && S_ISREG(attr->la_mode)) {
1305 struct lod_thread_info *info = lod_env_info(env);
1306 struct lu_buf *buf = &info->lti_buf;
1307 struct ost_id *oi = &info->lti_ostid;
1308 struct lu_fid *fid = &info->lti_fid;
1309 struct lov_mds_md_v1 *lmm;
1310 struct lov_ost_data_v1 *objs;
1314 rc1 = lod_get_lov_ea(env, lo);
1318 buf->lb_buf = info->lti_ea_store;
1319 buf->lb_len = info->lti_ea_store_size;
1320 lmm = info->lti_ea_store;
1321 magic = le32_to_cpu(lmm->lmm_magic);
1322 if (magic == LOV_MAGIC_V1)
1323 objs = &(lmm->lmm_objects[0]);
1325 objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
1326 ostid_le_to_cpu(&objs->l_ost_oi, oi);
1327 ostid_to_fid(fid, oi, le32_to_cpu(objs->l_ost_idx));
1329 fid_to_ostid(fid, oi);
1330 ostid_cpu_to_le(oi, &objs->l_ost_oi);
1332 rc = lod_sub_object_xattr_set(env, next, buf, XATTR_NAME_LOV,
1333 LU_XATTR_REPLACE, th);
1340 * Implementation of dt_object_operations::do_xattr_get.
1342 * If LOV EA is requested from the root object and it's not
1343 * found, then return default striping for the filesystem.
1345 * \see dt_object_operations::do_xattr_get() in the API description for details.
1347 static int lod_xattr_get(const struct lu_env *env, struct dt_object *dt,
1348 struct lu_buf *buf, const char *name)
1350 struct lod_thread_info *info = lod_env_info(env);
1351 struct lod_device *dev = lu2lod_dev(dt->do_lu.lo_dev);
1355 rc = dt_xattr_get(env, dt_object_child(dt), buf, name);
1356 if (strcmp(name, XATTR_NAME_LMV) == 0) {
1357 struct lmv_mds_md_v1 *lmv1;
1360 if (rc > (typeof(rc))sizeof(*lmv1))
1363 if (rc < (typeof(rc))sizeof(*lmv1))
1364 RETURN(rc = rc > 0 ? -EINVAL : rc);
1366 if (buf->lb_buf == NULL || buf->lb_len == 0) {
1367 CLASSERT(sizeof(*lmv1) <= sizeof(info->lti_key));
1369 info->lti_buf.lb_buf = info->lti_key;
1370 info->lti_buf.lb_len = sizeof(*lmv1);
1371 rc = dt_xattr_get(env, dt_object_child(dt),
1372 &info->lti_buf, name);
1373 if (unlikely(rc != sizeof(*lmv1)))
1374 RETURN(rc = rc > 0 ? -EINVAL : rc);
1376 lmv1 = info->lti_buf.lb_buf;
1377 /* The on-disk LMV EA only contains header, but the
1378 * returned LMV EA size should contain the space for
1379 * the FIDs of all shards of the striped directory. */
1380 if (le32_to_cpu(lmv1->lmv_magic) == LMV_MAGIC_V1)
1381 rc = lmv_mds_md_size(
1382 le32_to_cpu(lmv1->lmv_stripe_count),
1385 rc1 = lod_load_lmv_shards(env, lod_dt_obj(dt),
1389 RETURN(rc = rc1 != 0 ? rc1 : rc);
1392 if (rc != -ENODATA || !S_ISDIR(dt->do_lu.lo_header->loh_attr & S_IFMT))
1396 * lod returns default striping on the real root of the device
1397 * this is like the root stores default striping for the whole
1398 * filesystem. historically we've been using a different approach
1399 * and store it in the config.
1401 dt_root_get(env, dev->lod_child, &info->lti_fid);
1402 is_root = lu_fid_eq(&info->lti_fid, lu_object_fid(&dt->do_lu));
1404 if (is_root && strcmp(XATTR_NAME_LOV, name) == 0) {
1405 struct lov_user_md *lum = buf->lb_buf;
1406 struct lov_desc *desc = &dev->lod_desc;
1408 if (buf->lb_buf == NULL) {
1410 } else if (buf->lb_len >= sizeof(*lum)) {
1411 lum->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V1);
1412 lmm_oi_set_seq(&lum->lmm_oi, FID_SEQ_LOV_DEFAULT);
1413 lmm_oi_set_id(&lum->lmm_oi, 0);
1414 lmm_oi_cpu_to_le(&lum->lmm_oi, &lum->lmm_oi);
1415 lum->lmm_pattern = cpu_to_le32(desc->ld_pattern);
1416 lum->lmm_stripe_size = cpu_to_le32(
1417 desc->ld_default_stripe_size);
1418 lum->lmm_stripe_count = cpu_to_le16(
1419 desc->ld_default_stripe_count);
1420 lum->lmm_stripe_offset = cpu_to_le16(
1421 desc->ld_default_stripe_offset);
1434 * Checks that the magic of the stripe is sane.
1436 * \param[in] lod lod device
1437 * \param[in] lum a buffer storing LMV EA to verify
1439 * \retval 0 if the EA is sane
1440 * \retval negative otherwise
1442 static int lod_verify_md_striping(struct lod_device *lod,
1443 const struct lmv_user_md_v1 *lum)
1445 if (unlikely(le32_to_cpu(lum->lum_magic) != LMV_USER_MAGIC)) {
1446 CERROR("%s: invalid lmv_user_md: magic = %x, "
1447 "stripe_offset = %d, stripe_count = %u: rc = %d\n",
1448 lod2obd(lod)->obd_name, le32_to_cpu(lum->lum_magic),
1449 (int)le32_to_cpu(lum->lum_stripe_offset),
1450 le32_to_cpu(lum->lum_stripe_count), -EINVAL);
1458 * Initialize LMV EA for a slave.
1460 * Initialize slave's LMV EA from the master's LMV EA.
1462 * \param[in] master_lmv a buffer containing master's EA
1463 * \param[out] slave_lmv a buffer where slave's EA will be stored
1466 static void lod_prep_slave_lmv_md(struct lmv_mds_md_v1 *slave_lmv,
1467 const struct lmv_mds_md_v1 *master_lmv)
1469 *slave_lmv = *master_lmv;
1470 slave_lmv->lmv_magic = cpu_to_le32(LMV_MAGIC_STRIPE);
1476 * Generate LMV EA from the object passed as \a dt. The object must have
1477 * the stripes created and initialized.
1479 * \param[in] env execution environment
1480 * \param[in] dt object
1481 * \param[out] lmv_buf buffer storing generated LMV EA
1483 * \retval 0 on success
1484 * \retval negative if failed
1486 static int lod_prep_lmv_md(const struct lu_env *env, struct dt_object *dt,
1487 struct lu_buf *lmv_buf)
1489 struct lod_thread_info *info = lod_env_info(env);
1490 struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev);
1491 struct lod_object *lo = lod_dt_obj(dt);
1492 struct lmv_mds_md_v1 *lmm1;
1494 int type = LU_SEQ_RANGE_ANY;
1499 LASSERT(lo->ldo_dir_striped != 0);
1500 LASSERT(lo->ldo_stripenr > 0);
1501 stripe_count = lo->ldo_stripenr;
1502 /* Only store the LMV EA heahder on the disk. */
1503 if (info->lti_ea_store_size < sizeof(*lmm1)) {
1504 rc = lod_ea_store_resize(info, sizeof(*lmm1));
1508 memset(info->lti_ea_store, 0, sizeof(*lmm1));
1511 lmm1 = (struct lmv_mds_md_v1 *)info->lti_ea_store;
1512 lmm1->lmv_magic = cpu_to_le32(LMV_MAGIC);
1513 lmm1->lmv_stripe_count = cpu_to_le32(stripe_count);
1514 lmm1->lmv_hash_type = cpu_to_le32(lo->ldo_dir_hash_type);
1515 rc = lod_fld_lookup(env, lod, lu_object_fid(&dt->do_lu),
1520 lmm1->lmv_master_mdt_index = cpu_to_le32(mdtidx);
1521 lmv_buf->lb_buf = info->lti_ea_store;
1522 lmv_buf->lb_len = sizeof(*lmm1);
1528 * Create in-core represenation for a striped directory.
1530 * Parse the buffer containing LMV EA and instantiate LU objects
1531 * representing the stripe objects. The pointers to the objects are
1532 * stored in ldo_stripe field of \a lo. This function is used when
1533 * we need to access an already created object (i.e. load from a disk).
1535 * \param[in] env execution environment
1536 * \param[in] lo lod object
1537 * \param[in] buf buffer containing LMV EA
1539 * \retval 0 on success
1540 * \retval negative if failed
1542 int lod_parse_dir_striping(const struct lu_env *env, struct lod_object *lo,
1543 const struct lu_buf *buf)
1545 struct lod_thread_info *info = lod_env_info(env);
1546 struct lod_device *lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
1547 struct lod_tgt_descs *ltd = &lod->lod_mdt_descs;
1548 struct dt_object **stripe;
1549 union lmv_mds_md *lmm = buf->lb_buf;
1550 struct lmv_mds_md_v1 *lmv1 = &lmm->lmv_md_v1;
1551 struct lu_fid *fid = &info->lti_fid;
1556 if (le32_to_cpu(lmv1->lmv_hash_type) & LMV_HASH_FLAG_MIGRATION)
1559 if (le32_to_cpu(lmv1->lmv_magic) == LMV_MAGIC_STRIPE) {
1560 lo->ldo_dir_slave_stripe = 1;
1564 if (le32_to_cpu(lmv1->lmv_magic) != LMV_MAGIC_V1)
1567 if (le32_to_cpu(lmv1->lmv_stripe_count) < 1)
1570 LASSERT(lo->ldo_stripe == NULL);
1571 OBD_ALLOC(stripe, sizeof(stripe[0]) *
1572 (le32_to_cpu(lmv1->lmv_stripe_count)));
1576 for (i = 0; i < le32_to_cpu(lmv1->lmv_stripe_count); i++) {
1577 struct dt_device *tgt_dt;
1578 struct dt_object *dto;
1579 int type = LU_SEQ_RANGE_ANY;
1582 fid_le_to_cpu(fid, &lmv1->lmv_stripe_fids[i]);
1583 if (!fid_is_sane(fid))
1584 GOTO(out, rc = -ESTALE);
1586 rc = lod_fld_lookup(env, lod, fid, &idx, &type);
1590 if (idx == lod2lu_dev(lod)->ld_site->ld_seq_site->ss_node_id) {
1591 tgt_dt = lod->lod_child;
1593 struct lod_tgt_desc *tgt;
1595 tgt = LTD_TGT(ltd, idx);
1597 GOTO(out, rc = -ESTALE);
1598 tgt_dt = tgt->ltd_tgt;
1601 dto = dt_locate_at(env, tgt_dt, fid,
1602 lo->ldo_obj.do_lu.lo_dev->ld_site->ls_top_dev,
1605 GOTO(out, rc = PTR_ERR(dto));
1610 lo->ldo_stripe = stripe;
1611 lo->ldo_stripenr = le32_to_cpu(lmv1->lmv_stripe_count);
1612 lo->ldo_stripes_allocated = le32_to_cpu(lmv1->lmv_stripe_count);
1614 lod_object_free_striping(env, lo);
1620 * Create a striped directory.
1622 * Create a striped directory with a given stripe pattern on the specified MDTs.
1623 * A striped directory is represented as a regular directory - an index listing
1624 * all the stripes. The stripes point back to the master object with ".." and
1625 * LinkEA. The master object gets LMV EA which identifies it as a striped
1626 * directory. The function allocates FIDs for all the stripes.
1628 * \param[in] env execution environment
1629 * \param[in] dt object
1630 * \param[in] attr attributes to initialize the objects with
1631 * \param[in] lum a pattern specifying the number of stripes and
1633 * \param[in] dof type of objects to be created
1634 * \param[in] th transaction handle
1636 * \retval 0 on success
1637 * \retval negative if failed
1639 static int lod_dir_declare_create_stripes(const struct lu_env *env,
1640 struct dt_object *dt,
1641 struct lu_attr *attr,
1642 struct dt_object_format *dof,
1645 struct lod_thread_info *info = lod_env_info(env);
1646 struct lu_buf lmv_buf;
1647 struct lu_buf slave_lmv_buf;
1648 struct lmv_mds_md_v1 *lmm;
1649 struct lmv_mds_md_v1 *slave_lmm = NULL;
1650 struct dt_insert_rec *rec = &info->lti_dt_rec;
1651 struct lod_object *lo = lod_dt_obj(dt);
1656 rc = lod_prep_lmv_md(env, dt, &lmv_buf);
1659 lmm = lmv_buf.lb_buf;
1661 OBD_ALLOC_PTR(slave_lmm);
1662 if (slave_lmm == NULL)
1663 GOTO(out, rc = -ENOMEM);
1665 lod_prep_slave_lmv_md(slave_lmm, lmm);
1666 slave_lmv_buf.lb_buf = slave_lmm;
1667 slave_lmv_buf.lb_len = sizeof(*slave_lmm);
1669 if (!dt_try_as_dir(env, dt_object_child(dt)))
1670 GOTO(out, rc = -EINVAL);
1672 rec->rec_type = S_IFDIR;
1673 for (i = 0; i < lo->ldo_stripenr; i++) {
1674 struct dt_object *dto = lo->ldo_stripe[i];
1675 char *stripe_name = info->lti_key;
1676 struct lu_name *sname;
1677 struct linkea_data ldata = { NULL };
1678 struct lu_buf linkea_buf;
1680 rc = lod_sub_object_declare_create(env, dto, attr, NULL,
1685 if (!dt_try_as_dir(env, dto))
1686 GOTO(out, rc = -EINVAL);
1688 rc = lod_sub_object_declare_ref_add(env, dto, th);
1692 rec->rec_fid = lu_object_fid(&dto->do_lu);
1693 rc = lod_sub_object_declare_insert(env, dto,
1694 (const struct dt_rec *)rec,
1695 (const struct dt_key *)dot, th);
1699 /* master stripe FID will be put to .. */
1700 rec->rec_fid = lu_object_fid(&dt->do_lu);
1701 rc = lod_sub_object_declare_insert(env, dto,
1702 (const struct dt_rec *)rec,
1703 (const struct dt_key *)dotdot,
1708 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_SLAVE_LMV) ||
1709 cfs_fail_val != i) {
1710 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_LMV) &&
1712 slave_lmm->lmv_master_mdt_index =
1715 slave_lmm->lmv_master_mdt_index =
1717 rc = lod_sub_object_declare_xattr_set(env, dto,
1718 &slave_lmv_buf, XATTR_NAME_LMV, 0, th);
1723 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_NAME) &&
1725 snprintf(stripe_name, sizeof(info->lti_key), DFID":%u",
1726 PFID(lu_object_fid(&dto->do_lu)), i + 1);
1728 snprintf(stripe_name, sizeof(info->lti_key), DFID":%u",
1729 PFID(lu_object_fid(&dto->do_lu)), i);
1731 sname = lod_name_get(env, stripe_name, strlen(stripe_name));
1732 rc = linkea_data_new(&ldata, &info->lti_linkea_buf);
1736 rc = linkea_add_buf(&ldata, sname, lu_object_fid(&dt->do_lu));
1740 linkea_buf.lb_buf = ldata.ld_buf->lb_buf;
1741 linkea_buf.lb_len = ldata.ld_leh->leh_len;
1742 rc = lod_sub_object_declare_xattr_set(env, dto, &linkea_buf,
1743 XATTR_NAME_LINK, 0, th);
1747 rec->rec_fid = lu_object_fid(&dto->do_lu);
1748 rc = lod_sub_object_declare_insert(env, dt_object_child(dt),
1749 (const struct dt_rec *)rec,
1750 (const struct dt_key *)stripe_name,
1755 rc = lod_sub_object_declare_ref_add(env, dt_object_child(dt),
1761 rc = lod_sub_object_declare_xattr_set(env, dt_object_child(dt),
1762 &lmv_buf, XATTR_NAME_LMV, 0, th);
1766 if (slave_lmm != NULL)
1767 OBD_FREE_PTR(slave_lmm);
1772 static int lod_prep_md_striped_create(const struct lu_env *env,
1773 struct dt_object *dt,
1774 struct lu_attr *attr,
1775 const struct lmv_user_md_v1 *lum,
1776 struct dt_object_format *dof,
1779 struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev);
1780 struct lod_tgt_descs *ltd = &lod->lod_mdt_descs;
1781 struct lod_object *lo = lod_dt_obj(dt);
1782 struct dt_object **stripe;
1790 /* The lum has been verifed in lod_verify_md_striping */
1791 LASSERT(le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC);
1792 LASSERT(le32_to_cpu(lum->lum_stripe_count) > 0);
1794 stripe_count = le32_to_cpu(lum->lum_stripe_count);
1796 /* shrink the stripe_count to the avaible MDT count */
1797 if (stripe_count > lod->lod_remote_mdt_count + 1)
1798 stripe_count = lod->lod_remote_mdt_count + 1;
1800 OBD_ALLOC(stripe, sizeof(stripe[0]) * stripe_count);
1804 OBD_ALLOC(idx_array, sizeof(idx_array[0]) * stripe_count);
1805 if (idx_array == NULL)
1806 GOTO(out_free, rc = -ENOMEM);
1808 for (i = 0; i < stripe_count; i++) {
1809 struct lod_tgt_desc *tgt = NULL;
1810 struct dt_object *dto;
1811 struct lu_fid fid = { 0 };
1813 struct lu_object_conf conf = { 0 };
1814 struct dt_device *tgt_dt = NULL;
1817 /* Right now, master stripe and master object are
1818 * on the same MDT */
1819 idx = lu_site2seq(lod2lu_dev(lod)->ld_site)->ss_node_id;
1820 rc = obd_fid_alloc(env, lod->lod_child_exp, &fid,
1824 tgt_dt = lod->lod_child;
1828 idx = (idx_array[i - 1] + 1) % (lod->lod_remote_mdt_count + 1);
1830 for (j = 0; j < lod->lod_remote_mdt_count;
1831 j++, idx = (idx + 1) % (lod->lod_remote_mdt_count + 1)) {
1832 bool already_allocated = false;
1835 CDEBUG(D_INFO, "try idx %d, mdt cnt %u,"
1836 " allocated %u, last allocated %d\n", idx,
1837 lod->lod_remote_mdt_count, i, idx_array[i - 1]);
1839 /* Find next available target */
1840 if (!cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx))
1843 /* check whether the idx already exists
1844 * in current allocated array */
1845 for (k = 0; k < i; k++) {
1846 if (idx_array[k] == idx) {
1847 already_allocated = true;
1852 if (already_allocated)
1855 /* check the status of the OSP */
1856 tgt = LTD_TGT(ltd, idx);
1860 tgt_dt = tgt->ltd_tgt;
1861 rc = dt_statfs(env, tgt_dt, NULL);
1863 /* this OSP doesn't feel well */
1868 rc = obd_fid_alloc(env, tgt->ltd_exp, &fid, NULL);
1877 /* Can not allocate more stripes */
1878 if (j == lod->lod_remote_mdt_count) {
1879 CDEBUG(D_INFO, "%s: require stripes %u only get %d\n",
1880 lod2obd(lod)->obd_name, stripe_count, i - 1);
1884 CDEBUG(D_INFO, "idx %d, mdt cnt %u,"
1885 " allocated %u, last allocated %d\n", idx,
1886 lod->lod_remote_mdt_count, i, idx_array[i - 1]);
1889 /* tgt_dt and fid must be ready after search avaible OSP
1890 * in the above loop */
1891 LASSERT(tgt_dt != NULL);
1892 LASSERT(fid_is_sane(&fid));
1893 conf.loc_flags = LOC_F_NEW;
1894 dto = dt_locate_at(env, tgt_dt, &fid,
1895 dt->do_lu.lo_dev->ld_site->ls_top_dev,
1898 GOTO(out_put, rc = PTR_ERR(dto));
1903 lo->ldo_dir_striped = 1;
1904 lo->ldo_stripe = stripe;
1905 lo->ldo_stripenr = i;
1906 lo->ldo_stripes_allocated = stripe_count;
1908 if (lo->ldo_stripenr == 0)
1909 GOTO(out_put, rc = -ENOSPC);
1911 rc = lod_dir_declare_create_stripes(env, dt, attr, dof, th);
1917 for (i = 0; i < stripe_count; i++)
1918 if (stripe[i] != NULL)
1919 lu_object_put(env, &stripe[i]->do_lu);
1920 OBD_FREE(stripe, sizeof(stripe[0]) * stripe_count);
1921 lo->ldo_stripenr = 0;
1922 lo->ldo_stripes_allocated = 0;
1923 lo->ldo_stripe = NULL;
1927 if (idx_array != NULL)
1928 OBD_FREE(idx_array, sizeof(idx_array[0]) * stripe_count);
1934 * Declare create striped md object.
1936 * The function declares intention to create a striped directory. This is a
1937 * wrapper for lod_prep_md_striped_create(). The only additional functionality
1938 * is to verify pattern \a lum_buf is good. Check that function for the details.
1940 * \param[in] env execution environment
1941 * \param[in] dt object
1942 * \param[in] attr attributes to initialize the objects with
1943 * \param[in] lum_buf a pattern specifying the number of stripes and
1945 * \param[in] dof type of objects to be created
1946 * \param[in] th transaction handle
1948 * \retval 0 on success
1949 * \retval negative if failed
1952 static int lod_declare_xattr_set_lmv(const struct lu_env *env,
1953 struct dt_object *dt,
1954 struct lu_attr *attr,
1955 const struct lu_buf *lum_buf,
1956 struct dt_object_format *dof,
1959 struct lod_object *lo = lod_dt_obj(dt);
1960 struct lod_device *lod = lu2lod_dev(dt->do_lu.lo_dev);
1961 struct lmv_user_md_v1 *lum;
1965 lum = lum_buf->lb_buf;
1966 LASSERT(lum != NULL);
1968 CDEBUG(D_INFO, "lum magic = %x count = %u offset = %d\n",
1969 le32_to_cpu(lum->lum_magic), le32_to_cpu(lum->lum_stripe_count),
1970 (int)le32_to_cpu(lum->lum_stripe_offset));
1972 if (le32_to_cpu(lum->lum_stripe_count) == 0)
1975 rc = lod_verify_md_striping(lod, lum);
1979 /* prepare dir striped objects */
1980 rc = lod_prep_md_striped_create(env, dt, attr, lum, dof, th);
1982 /* failed to create striping, let's reset
1983 * config so that others don't get confused */
1984 lod_object_free_striping(env, lo);
1993 * Implementation of dt_object_operations::do_declare_xattr_set.
1995 * Used with regular (non-striped) objects. Basically it
1996 * initializes the striping information and applies the
1997 * change to all the stripes.
1999 * \see dt_object_operations::do_declare_xattr_set() in the API description
2002 static int lod_dir_declare_xattr_set(const struct lu_env *env,
2003 struct dt_object *dt,
2004 const struct lu_buf *buf,
2005 const char *name, int fl,
2008 struct dt_object *next = dt_object_child(dt);
2009 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
2010 struct lod_object *lo = lod_dt_obj(dt);
2015 if (strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0) {
2016 struct lmv_user_md_v1 *lum;
2018 LASSERT(buf != NULL && buf->lb_buf != NULL);
2020 rc = lod_verify_md_striping(d, lum);
2025 rc = lod_sub_object_declare_xattr_set(env, next, buf, name, fl, th);
2029 /* set xattr to each stripes, if needed */
2030 rc = lod_load_striping(env, lo);
2034 /* Note: Do not set LinkEA on sub-stripes, otherwise
2035 * it will confuse the fid2path process(see mdt_path_current()).
2036 * The linkEA between master and sub-stripes is set in
2037 * lod_xattr_set_lmv(). */
2038 if (lo->ldo_stripenr == 0 || strcmp(name, XATTR_NAME_LINK) == 0)
2041 for (i = 0; i < lo->ldo_stripenr; i++) {
2042 LASSERT(lo->ldo_stripe[i]);
2044 rc = lod_sub_object_declare_xattr_set(env, lo->ldo_stripe[i],
2054 * Implementation of dt_object_operations::do_declare_xattr_set.
2056 * \see dt_object_operations::do_declare_xattr_set() in the API description
2059 * the extension to the API:
2060 * - declaring LOVEA requests striping creation
2061 * - LU_XATTR_REPLACE means layout swap
2063 static int lod_declare_xattr_set(const struct lu_env *env,
2064 struct dt_object *dt,
2065 const struct lu_buf *buf,
2066 const char *name, int fl,
2069 struct dt_object *next = dt_object_child(dt);
2070 struct lu_attr *attr = &lod_env_info(env)->lti_attr;
2076 * allow to declare predefined striping on a new (!mode) object
2077 * which is supposed to be replay of regular file creation
2078 * (when LOV setting is declared)
2079 * LU_XATTR_REPLACE is set to indicate a layout swap
2081 mode = dt->do_lu.lo_header->loh_attr & S_IFMT;
2082 if ((S_ISREG(mode) || mode == 0) && strcmp(name, XATTR_NAME_LOV) == 0 &&
2083 !(fl & LU_XATTR_REPLACE)) {
2085 * this is a request to manipulate object's striping
2087 if (dt_object_exists(dt)) {
2088 rc = dt_attr_get(env, next, attr);
2092 memset(attr, 0, sizeof(*attr));
2093 attr->la_valid = LA_TYPE | LA_MODE;
2094 attr->la_mode = S_IFREG;
2096 rc = lod_declare_striped_object(env, dt, attr, buf, th);
2097 } else if (S_ISDIR(mode)) {
2098 rc = lod_dir_declare_xattr_set(env, dt, buf, name, fl, th);
2100 rc = lod_sub_object_declare_xattr_set(env, next, buf, name,
2108 * Resets cached default striping in the object.
2110 * \param[in] lo object
2112 static void lod_lov_stripe_cache_clear(struct lod_object *lo)
2114 lo->ldo_def_striping_set = 0;
2115 lo->ldo_def_striping_cached = 0;
2116 lod_object_set_pool(lo, NULL);
2117 lo->ldo_def_stripe_size = 0;
2118 lo->ldo_def_stripenr = 0;
2119 if (lo->ldo_dir_stripe != NULL)
2120 lo->ldo_dir_def_striping_cached = 0;
2124 * Apply xattr changes to the object.
2126 * Applies xattr changes to the object and the stripes if the latter exist.
2128 * \param[in] env execution environment
2129 * \param[in] dt object
2130 * \param[in] buf buffer pointing to the new value of xattr
2131 * \param[in] name name of xattr
2132 * \param[in] fl flags
2133 * \param[in] th transaction handle
2135 * \retval 0 on success
2136 * \retval negative if failed
2138 static int lod_xattr_set_internal(const struct lu_env *env,
2139 struct dt_object *dt,
2140 const struct lu_buf *buf,
2141 const char *name, int fl, struct thandle *th)
2143 struct dt_object *next = dt_object_child(dt);
2144 struct lod_object *lo = lod_dt_obj(dt);
2149 rc = lod_sub_object_xattr_set(env, next, buf, name, fl, th);
2150 if (rc != 0 || !S_ISDIR(dt->do_lu.lo_header->loh_attr))
2153 /* Note: Do not set LinkEA on sub-stripes, otherwise
2154 * it will confuse the fid2path process(see mdt_path_current()).
2155 * The linkEA between master and sub-stripes is set in
2156 * lod_xattr_set_lmv(). */
2157 if (lo->ldo_stripenr == 0 || strcmp(name, XATTR_NAME_LINK) == 0)
2160 for (i = 0; i < lo->ldo_stripenr; i++) {
2161 LASSERT(lo->ldo_stripe[i]);
2163 rc = lod_sub_object_xattr_set(env, lo->ldo_stripe[i], buf, name,
2173 * Delete an extended attribute.
2175 * Deletes specified xattr from the object and the stripes if the latter exist.
2177 * \param[in] env execution environment
2178 * \param[in] dt object
2179 * \param[in] name name of xattr
2180 * \param[in] th transaction handle
2182 * \retval 0 on success
2183 * \retval negative if failed
2185 static int lod_xattr_del_internal(const struct lu_env *env,
2186 struct dt_object *dt,
2187 const char *name, struct thandle *th)
2189 struct dt_object *next = dt_object_child(dt);
2190 struct lod_object *lo = lod_dt_obj(dt);
2195 rc = lod_sub_object_xattr_del(env, next, name, th);
2196 if (rc != 0 || !S_ISDIR(dt->do_lu.lo_header->loh_attr))
2199 if (lo->ldo_stripenr == 0)
2202 for (i = 0; i < lo->ldo_stripenr; i++) {
2203 LASSERT(lo->ldo_stripe[i]);
2205 rc = lod_sub_object_xattr_del(env, lo->ldo_stripe[i], name,
2215 * Set default striping on a directory.
2217 * Sets specified striping on a directory object unless it matches the default
2218 * striping (LOVEA_DELETE_VALUES() macro). In the latter case remove existing
2219 * EA. This striping will be used when regular file is being created in this
2222 * \param[in] env execution environment
2223 * \param[in] dt the striped object
2224 * \param[in] buf buffer with the striping
2225 * \param[in] name name of EA
2226 * \param[in] fl xattr flag (see OSD API description)
2227 * \param[in] th transaction handle
2229 * \retval 0 on success
2230 * \retval negative if failed
2232 static int lod_xattr_set_lov_on_dir(const struct lu_env *env,
2233 struct dt_object *dt,
2234 const struct lu_buf *buf,
2235 const char *name, int fl,
2238 struct lod_device *d = lu2lod_dev(dt->do_lu.lo_dev);
2239 struct lod_object *l = lod_dt_obj(dt);
2240 struct lov_user_md_v1 *lum;
2241 struct lov_user_md_v3 *v3 = NULL;
2242 const char *pool_name = NULL;
2246 /* If it is striped dir, we should clear the stripe cache for
2247 * slave stripe as well, but there are no effective way to
2248 * notify the LOD on the slave MDT, so we do not cache stripe
2249 * information for slave stripe for now. XXX*/
2250 lod_lov_stripe_cache_clear(l);
2251 LASSERT(buf != NULL && buf->lb_buf != NULL);
2254 rc = lod_verify_striping(d, buf, false);
2258 if (lum->lmm_magic == LOV_USER_MAGIC_V3) {
2260 if (v3->lmm_pool_name[0] != '\0')
2261 pool_name = v3->lmm_pool_name;
2264 /* if { size, offset, count } = { 0, -1, 0 } and no pool
2265 * (i.e. all default values specified) then delete default
2266 * striping from dir. */
2268 "set default striping: sz %u # %u offset %d %s %s\n",
2269 (unsigned)lum->lmm_stripe_size,
2270 (unsigned)lum->lmm_stripe_count,
2271 (int)lum->lmm_stripe_offset,
2272 v3 ? "from" : "", v3 ? v3->lmm_pool_name : "");
2274 if (LOVEA_DELETE_VALUES(lum->lmm_stripe_size, lum->lmm_stripe_count,
2275 lum->lmm_stripe_offset, pool_name)) {
2276 rc = lod_xattr_del_internal(env, dt, name, th);
2280 rc = lod_xattr_set_internal(env, dt, buf, name, fl, th);
2287 * Set default striping on a directory object.
2289 * Sets specified striping on a directory object unless it matches the default
2290 * striping (LOVEA_DELETE_VALUES() macro). In the latter case remove existing
2291 * EA. This striping will be used when a new directory is being created in the
2294 * \param[in] env execution environment
2295 * \param[in] dt the striped object
2296 * \param[in] buf buffer with the striping
2297 * \param[in] name name of EA
2298 * \param[in] fl xattr flag (see OSD API description)
2299 * \param[in] th transaction handle
2301 * \retval 0 on success
2302 * \retval negative if failed
2304 static int lod_xattr_set_default_lmv_on_dir(const struct lu_env *env,
2305 struct dt_object *dt,
2306 const struct lu_buf *buf,
2307 const char *name, int fl,
2310 struct lod_object *l = lod_dt_obj(dt);
2311 struct lmv_user_md_v1 *lum;
2315 LASSERT(buf != NULL && buf->lb_buf != NULL);
2318 CDEBUG(D_OTHER, "set default stripe_count # %u stripe_offset %d\n",
2319 le32_to_cpu(lum->lum_stripe_count),
2320 (int)le32_to_cpu(lum->lum_stripe_offset));
2322 if (LMVEA_DELETE_VALUES((le32_to_cpu(lum->lum_stripe_count)),
2323 le32_to_cpu(lum->lum_stripe_offset)) &&
2324 le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC) {
2325 rc = lod_xattr_del_internal(env, dt, name, th);
2329 rc = lod_xattr_set_internal(env, dt, buf, name, fl, th);
2334 /* Update default stripe cache */
2335 if (l->ldo_dir_stripe == NULL) {
2336 OBD_ALLOC_PTR(l->ldo_dir_stripe);
2337 if (l->ldo_dir_stripe == NULL)
2341 l->ldo_dir_def_striping_cached = 0;
2346 * Turn directory into a striped directory.
2348 * During replay the client sends the striping created before MDT
2349 * failure, then the layer above LOD sends this defined striping
2350 * using ->do_xattr_set(), so LOD uses this method to replay creation
2351 * of the stripes. Notice the original information for the striping
2352 * (#stripes, FIDs, etc) was transferred in declare path.
2354 * \param[in] env execution environment
2355 * \param[in] dt the striped object
2356 * \param[in] buf not used currently
2357 * \param[in] name not used currently
2358 * \param[in] fl xattr flag (see OSD API description)
2359 * \param[in] th transaction handle
2361 * \retval 0 on success
2362 * \retval negative if failed
2364 static int lod_xattr_set_lmv(const struct lu_env *env, struct dt_object *dt,
2365 const struct lu_buf *buf, const char *name,
2366 int fl, struct thandle *th)
2368 struct lod_object *lo = lod_dt_obj(dt);
2369 struct lod_thread_info *info = lod_env_info(env);
2370 struct lu_attr *attr = &info->lti_attr;
2371 struct dt_object_format *dof = &info->lti_format;
2372 struct lu_buf lmv_buf;
2373 struct lu_buf slave_lmv_buf;
2374 struct lmv_mds_md_v1 *lmm;
2375 struct lmv_mds_md_v1 *slave_lmm = NULL;
2376 struct dt_insert_rec *rec = &info->lti_dt_rec;
2381 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr))
2384 /* The stripes are supposed to be allocated in declare phase,
2385 * if there are no stripes being allocated, it will skip */
2386 if (lo->ldo_stripenr == 0)
2389 rc = dt_attr_get(env, dt_object_child(dt), attr);
2393 attr->la_valid = LA_ATIME | LA_MTIME | LA_CTIME |
2394 LA_MODE | LA_UID | LA_GID | LA_TYPE;
2395 dof->dof_type = DFT_DIR;
2397 rc = lod_prep_lmv_md(env, dt, &lmv_buf);
2400 lmm = lmv_buf.lb_buf;
2402 OBD_ALLOC_PTR(slave_lmm);
2403 if (slave_lmm == NULL)
2406 lod_prep_slave_lmv_md(slave_lmm, lmm);
2407 slave_lmv_buf.lb_buf = slave_lmm;
2408 slave_lmv_buf.lb_len = sizeof(*slave_lmm);
2410 rec->rec_type = S_IFDIR;
2411 for (i = 0; i < lo->ldo_stripenr; i++) {
2412 struct dt_object *dto;
2413 char *stripe_name = info->lti_key;
2414 struct lu_name *sname;
2415 struct linkea_data ldata = { NULL };
2416 struct lu_buf linkea_buf;
2418 dto = lo->ldo_stripe[i];
2420 dt_write_lock(env, dto, MOR_TGT_CHILD);
2421 rc = lod_sub_object_create(env, dto, attr, NULL, dof,
2424 dt_write_unlock(env, dto);
2428 rc = lod_sub_object_ref_add(env, dto, th);
2429 dt_write_unlock(env, dto);
2433 rec->rec_fid = lu_object_fid(&dto->do_lu);
2434 rc = lod_sub_object_index_insert(env, dto,
2435 (const struct dt_rec *)rec,
2436 (const struct dt_key *)dot, th, 0);
2440 rec->rec_fid = lu_object_fid(&dt->do_lu);
2441 rc = lod_sub_object_index_insert(env, dto, (struct dt_rec *)rec,
2442 (const struct dt_key *)dotdot, th, 0);
2446 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_SLAVE_LMV) ||
2447 cfs_fail_val != i) {
2448 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_LMV) &&
2450 slave_lmm->lmv_master_mdt_index =
2453 slave_lmm->lmv_master_mdt_index =
2456 rc = lod_sub_object_xattr_set(env, dto, &slave_lmv_buf,
2457 XATTR_NAME_LMV, fl, th);
2462 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_SLAVE_NAME) &&
2464 snprintf(stripe_name, sizeof(info->lti_key), DFID":%d",
2465 PFID(lu_object_fid(&dto->do_lu)), i + 1);
2467 snprintf(stripe_name, sizeof(info->lti_key), DFID":%d",
2468 PFID(lu_object_fid(&dto->do_lu)), i);
2470 sname = lod_name_get(env, stripe_name, strlen(stripe_name));
2471 rc = linkea_data_new(&ldata, &info->lti_linkea_buf);
2475 rc = linkea_add_buf(&ldata, sname, lu_object_fid(&dt->do_lu));
2479 linkea_buf.lb_buf = ldata.ld_buf->lb_buf;
2480 linkea_buf.lb_len = ldata.ld_leh->leh_len;
2481 rc = lod_sub_object_xattr_set(env, dto, &linkea_buf,
2482 XATTR_NAME_LINK, 0, th);
2486 rec->rec_fid = lu_object_fid(&dto->do_lu);
2487 rc = lod_sub_object_index_insert(env, dt_object_child(dt),
2488 (const struct dt_rec *)rec,
2489 (const struct dt_key *)stripe_name, th, 0);
2493 rc = lod_sub_object_ref_add(env, dt_object_child(dt), th);
2498 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MASTER_LMV))
2499 rc = lod_sub_object_xattr_set(env, dt_object_child(dt),
2500 &lmv_buf, XATTR_NAME_LMV, fl, th);
2502 if (slave_lmm != NULL)
2503 OBD_FREE_PTR(slave_lmm);
2509 * Helper function to declare/execute creation of a striped directory
2511 * Called in declare/create object path, prepare striping for a directory
2512 * and prepare defaults data striping for the objects to be created in
2513 * that directory. Notice the function calls "declaration" or "execution"
2514 * methods depending on \a declare param. This is a consequence of the
2515 * current approach while we don't have natural distributed transactions:
2516 * we basically execute non-local updates in the declare phase. So, the
2517 * arguments for the both phases are the same and this is the reason for
2518 * this function to exist.
2520 * \param[in] env execution environment
2521 * \param[in] dt object
2522 * \param[in] attr attributes the stripes will be created with
2523 * \param[in] dof format of stripes (see OSD API description)
2524 * \param[in] th transaction handle
2525 * \param[in] declare where to call "declare" or "execute" methods
2527 * \retval 0 on success
2528 * \retval negative if failed
2530 static int lod_dir_striping_create_internal(const struct lu_env *env,
2531 struct dt_object *dt,
2532 struct lu_attr *attr,
2533 struct dt_object_format *dof,
2537 struct lod_thread_info *info = lod_env_info(env);
2538 struct lod_object *lo = lod_dt_obj(dt);
2542 if (!LMVEA_DELETE_VALUES(lo->ldo_stripenr,
2543 lo->ldo_dir_stripe_offset)) {
2544 struct lmv_user_md_v1 *v1 = info->lti_ea_store;
2545 int stripe_count = lo->ldo_stripenr;
2547 if (info->lti_ea_store_size < sizeof(*v1)) {
2548 rc = lod_ea_store_resize(info, sizeof(*v1));
2551 v1 = info->lti_ea_store;
2554 memset(v1, 0, sizeof(*v1));
2555 v1->lum_magic = cpu_to_le32(LMV_USER_MAGIC);
2556 v1->lum_stripe_count = cpu_to_le32(stripe_count);
2557 v1->lum_stripe_offset =
2558 cpu_to_le32(lo->ldo_dir_stripe_offset);
2560 info->lti_buf.lb_buf = v1;
2561 info->lti_buf.lb_len = sizeof(*v1);
2564 rc = lod_declare_xattr_set_lmv(env, dt, attr,
2565 &info->lti_buf, dof, th);
2567 rc = lod_xattr_set_lmv(env, dt, &info->lti_buf,
2568 XATTR_NAME_LMV, 0, th);
2573 /* Transfer default LMV striping from the parent */
2574 if (lo->ldo_dir_def_striping_set &&
2575 !LMVEA_DELETE_VALUES(lo->ldo_dir_def_stripenr,
2576 lo->ldo_dir_def_stripe_offset)) {
2577 struct lmv_user_md_v1 *v1 = info->lti_ea_store;
2578 int def_stripe_count = lo->ldo_dir_def_stripenr;
2580 if (info->lti_ea_store_size < sizeof(*v1)) {
2581 rc = lod_ea_store_resize(info, sizeof(*v1));
2584 v1 = info->lti_ea_store;
2587 memset(v1, 0, sizeof(*v1));
2588 v1->lum_magic = cpu_to_le32(LMV_USER_MAGIC);
2589 v1->lum_stripe_count = cpu_to_le32(def_stripe_count);
2590 v1->lum_stripe_offset =
2591 cpu_to_le32(lo->ldo_dir_def_stripe_offset);
2593 cpu_to_le32(lo->ldo_dir_def_hash_type);
2595 info->lti_buf.lb_buf = v1;
2596 info->lti_buf.lb_len = sizeof(*v1);
2598 rc = lod_dir_declare_xattr_set(env, dt, &info->lti_buf,
2599 XATTR_NAME_DEFAULT_LMV,
2602 rc = lod_xattr_set_default_lmv_on_dir(env, dt,
2604 XATTR_NAME_DEFAULT_LMV, 0,
2610 /* Transfer default LOV striping from the parent */
2611 if (lo->ldo_def_striping_set &&
2612 !LOVEA_DELETE_VALUES(lo->ldo_def_stripe_size,
2613 lo->ldo_def_stripenr,
2614 lo->ldo_def_stripe_offset,
2616 struct lov_user_md_v3 *v3 = info->lti_ea_store;
2618 if (info->lti_ea_store_size < sizeof(*v3)) {
2619 rc = lod_ea_store_resize(info, sizeof(*v3));
2622 v3 = info->lti_ea_store;
2625 memset(v3, 0, sizeof(*v3));
2626 v3->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V3);
2627 v3->lmm_stripe_count = cpu_to_le16(lo->ldo_def_stripenr);
2628 v3->lmm_stripe_offset = cpu_to_le16(lo->ldo_def_stripe_offset);
2629 v3->lmm_stripe_size = cpu_to_le32(lo->ldo_def_stripe_size);
2630 if (lo->ldo_pool != NULL)
2631 strlcpy(v3->lmm_pool_name, lo->ldo_pool,
2632 sizeof(v3->lmm_pool_name));
2634 info->lti_buf.lb_buf = v3;
2635 info->lti_buf.lb_len = sizeof(*v3);
2638 rc = lod_dir_declare_xattr_set(env, dt, &info->lti_buf,
2639 XATTR_NAME_LOV, 0, th);
2641 rc = lod_xattr_set_lov_on_dir(env, dt, &info->lti_buf,
2642 XATTR_NAME_LOV, 0, th);
2650 static int lod_declare_dir_striping_create(const struct lu_env *env,
2651 struct dt_object *dt,
2652 struct lu_attr *attr,
2653 struct dt_object_format *dof,
2656 return lod_dir_striping_create_internal(env, dt, attr, dof, th, true);
2659 static int lod_dir_striping_create(const struct lu_env *env,
2660 struct dt_object *dt,
2661 struct lu_attr *attr,
2662 struct dt_object_format *dof,
2665 struct lod_object *lo = lod_dt_obj(dt);
2668 rc = lod_dir_striping_create_internal(env, dt, attr, dof, th, false);
2670 lo->ldo_striping_cached = 1;
2676 * Implementation of dt_object_operations::do_xattr_set.
2678 * Sets specified extended attribute on the object. Three types of EAs are
2680 * LOV EA - stores striping for a regular file or default striping (when set
2682 * LMV EA - stores a marker for the striped directories
2683 * DMV EA - stores default directory striping
2685 * When striping is applied to a non-striped existing object (this is called
2686 * late striping), then LOD notices the caller wants to turn the object into a
2687 * striped one. The stripe objects are created and appropriate EA is set:
2688 * LOV EA storing all the stripes directly or LMV EA storing just a small header
2689 * with striping configuration.
2691 * \see dt_object_operations::do_xattr_set() in the API description for details.
2693 static int lod_xattr_set(const struct lu_env *env,
2694 struct dt_object *dt, const struct lu_buf *buf,
2695 const char *name, int fl, struct thandle *th)
2697 struct dt_object *next = dt_object_child(dt);
2701 if (S_ISDIR(dt->do_lu.lo_header->loh_attr) &&
2702 strcmp(name, XATTR_NAME_LMV) == 0) {
2703 struct lmv_mds_md_v1 *lmm = buf->lb_buf;
2705 if (lmm != NULL && le32_to_cpu(lmm->lmv_hash_type) &
2706 LMV_HASH_FLAG_MIGRATION)
2707 rc = lod_sub_object_xattr_set(env, next, buf, name, fl,
2710 rc = lod_dir_striping_create(env, dt, NULL, NULL, th);
2715 if (S_ISDIR(dt->do_lu.lo_header->loh_attr) &&
2716 strcmp(name, XATTR_NAME_LOV) == 0) {
2718 rc = lod_xattr_set_lov_on_dir(env, dt, buf, name, fl, th);
2720 } else if (S_ISDIR(dt->do_lu.lo_header->loh_attr) &&
2721 strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0) {
2723 rc = lod_xattr_set_default_lmv_on_dir(env, dt, buf, name, fl,
2726 } else if (S_ISREG(dt->do_lu.lo_header->loh_attr) &&
2727 !strcmp(name, XATTR_NAME_LOV)) {
2728 /* in case of lov EA swap, just set it
2729 * if not, it is a replay so check striping match what we
2730 * already have during req replay, declare_xattr_set()
2731 * defines striping, then create() does the work */
2732 if (fl & LU_XATTR_REPLACE) {
2733 /* free stripes, then update disk */
2734 lod_object_free_striping(env, lod_dt_obj(dt));
2736 rc = lod_sub_object_xattr_set(env, next, buf, name,
2738 } else if (dt_object_remote(dt)) {
2739 /* This only happens during migration, see
2740 * mdd_migrate_create(), in which Master MDT will
2741 * create a remote target object, and only set
2742 * (migrating) stripe EA on the remote object,
2743 * and does not need creating each stripes. */
2744 rc = lod_sub_object_xattr_set(env, next, buf, name,
2747 rc = lod_striping_create(env, dt, NULL, NULL, th);
2752 /* then all other xattr */
2753 rc = lod_xattr_set_internal(env, dt, buf, name, fl, th);
2759 * Implementation of dt_object_operations::do_declare_xattr_del.
2761 * \see dt_object_operations::do_declare_xattr_del() in the API description
2764 static int lod_declare_xattr_del(const struct lu_env *env,
2765 struct dt_object *dt, const char *name,
2768 struct lod_object *lo = lod_dt_obj(dt);
2773 rc = lod_sub_object_declare_xattr_del(env, dt_object_child(dt),
2778 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr))
2781 /* set xattr to each stripes, if needed */
2782 rc = lod_load_striping(env, lo);
2786 if (lo->ldo_stripenr == 0)
2789 for (i = 0; i < lo->ldo_stripenr; i++) {
2790 LASSERT(lo->ldo_stripe[i]);
2791 rc = lod_sub_object_declare_xattr_del(env, lo->ldo_stripe[i],
2801 * Implementation of dt_object_operations::do_xattr_del.
2803 * If EA storing a regular striping is being deleted, then release
2804 * all the references to the stripe objects in core.
2806 * \see dt_object_operations::do_xattr_del() in the API description for details.
2808 static int lod_xattr_del(const struct lu_env *env, struct dt_object *dt,
2809 const char *name, struct thandle *th)
2811 struct dt_object *next = dt_object_child(dt);
2812 struct lod_object *lo = lod_dt_obj(dt);
2817 if (!strcmp(name, XATTR_NAME_LOV))
2818 lod_object_free_striping(env, lod_dt_obj(dt));
2820 rc = lod_sub_object_xattr_del(env, next, name, th);
2821 if (rc != 0 || !S_ISDIR(dt->do_lu.lo_header->loh_attr))
2824 if (lo->ldo_stripenr == 0)
2827 for (i = 0; i < lo->ldo_stripenr; i++) {
2828 LASSERT(lo->ldo_stripe[i]);
2830 rc = lod_sub_object_xattr_del(env, lo->ldo_stripe[i], name, th);
2839 * Implementation of dt_object_operations::do_xattr_list.
2841 * \see dt_object_operations::do_xattr_list() in the API description
2844 static int lod_xattr_list(const struct lu_env *env,
2845 struct dt_object *dt, const struct lu_buf *buf)
2847 return dt_xattr_list(env, dt_object_child(dt), buf);
2851 * Initialize a pool the object belongs to.
2853 * When a striped object is being created, striping configuration
2854 * may demand the stripes are allocated on a limited set of the
2855 * targets. These limited sets are known as "pools". So we copy
2856 * a pool name into the object and later actual creation methods
2857 * (like lod_object_create()) will use this information to allocate
2858 * the stripes properly.
2860 * \param[in] o object
2861 * \param[in] pool pool name
2863 int lod_object_set_pool(struct lod_object *o, char *pool)
2868 len = strlen(o->ldo_pool);
2869 OBD_FREE(o->ldo_pool, len + 1);
2874 OBD_ALLOC(o->ldo_pool, len + 1);
2875 if (o->ldo_pool == NULL)
2877 strcpy(o->ldo_pool, pool);
2882 static inline int lod_object_will_be_striped(int is_reg, const struct lu_fid *fid)
2884 return (is_reg && fid_seq(fid) != FID_SEQ_LOCAL_FILE);
2889 * Cache default regular striping in the object.
2891 * To improve performance of striped regular object creation we cache
2892 * default LOV striping (if it exists) in the parent directory object.
2894 * \param[in] env execution environment
2895 * \param[in] lp object
2897 * \retval 0 on success
2898 * \retval negative if failed
2900 static int lod_cache_parent_lov_striping(const struct lu_env *env,
2901 struct lod_object *lp)
2903 struct lod_thread_info *info = lod_env_info(env);
2904 struct lov_user_md_v1 *v1 = NULL;
2905 struct lov_user_md_v3 *v3 = NULL;
2909 /* called from MDD without parent being write locked,
2911 dt_write_lock(env, dt_object_child(&lp->ldo_obj), 0);
2912 rc = lod_get_lov_ea(env, lp);
2916 if (rc < (typeof(rc))sizeof(struct lov_user_md)) {
2917 /* don't lookup for non-existing or invalid striping */
2918 lp->ldo_def_striping_set = 0;
2919 lp->ldo_def_striping_cached = 1;
2920 lp->ldo_def_stripe_size = 0;
2921 lp->ldo_def_stripenr = 0;
2922 lp->ldo_def_stripe_offset = (typeof(v1->lmm_stripe_offset))(-1);
2923 GOTO(unlock, rc = 0);
2927 v1 = info->lti_ea_store;
2928 if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V1)) {
2929 lustre_swab_lov_user_md_v1(v1);
2930 } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V3)) {
2931 v3 = (struct lov_user_md_v3 *)v1;
2932 lustre_swab_lov_user_md_v3(v3);
2935 if (v1->lmm_magic != LOV_MAGIC_V3 && v1->lmm_magic != LOV_MAGIC_V1)
2936 GOTO(unlock, rc = 0);
2938 if (v1->lmm_pattern != LOV_PATTERN_RAID0 && v1->lmm_pattern != 0)
2939 GOTO(unlock, rc = 0);
2941 CDEBUG(D_INFO, DFID" stripe_count=%d stripe_size=%d stripe_offset=%d\n",
2942 PFID(lu_object_fid(&lp->ldo_obj.do_lu)),
2943 (int)v1->lmm_stripe_count,
2944 (int)v1->lmm_stripe_size, (int)v1->lmm_stripe_offset);
2946 lp->ldo_def_stripenr = v1->lmm_stripe_count;
2947 lp->ldo_def_stripe_size = v1->lmm_stripe_size;
2948 lp->ldo_def_stripe_offset = v1->lmm_stripe_offset;
2949 lp->ldo_def_striping_cached = 1;
2950 lp->ldo_def_striping_set = 1;
2951 if (v1->lmm_magic == LOV_USER_MAGIC_V3) {
2952 /* XXX: sanity check here */
2953 v3 = (struct lov_user_md_v3 *) v1;
2954 if (v3->lmm_pool_name[0])
2955 lod_object_set_pool(lp, v3->lmm_pool_name);
2959 dt_write_unlock(env, dt_object_child(&lp->ldo_obj));
2965 * Cache default directory striping in the object.
2967 * To improve performance of striped directory creation we cache default
2968 * directory striping (if it exists) in the parent directory object.
2970 * \param[in] env execution environment
2971 * \param[in] lp object
2973 * \retval 0 on success
2974 * \retval negative if failed
2976 static int lod_cache_parent_lmv_striping(const struct lu_env *env,
2977 struct lod_object *lp)
2979 struct lod_thread_info *info = lod_env_info(env);
2980 struct lmv_user_md_v1 *v1 = NULL;
2984 /* called from MDD without parent being write locked,
2986 dt_write_lock(env, dt_object_child(&lp->ldo_obj), 0);
2987 rc = lod_get_default_lmv_ea(env, lp);
2991 if (rc < (typeof(rc))sizeof(struct lmv_user_md)) {
2992 /* don't lookup for non-existing or invalid striping */
2993 lp->ldo_dir_def_striping_set = 0;
2994 lp->ldo_dir_def_striping_cached = 1;
2995 lp->ldo_dir_def_stripenr = 0;
2996 lp->ldo_dir_def_stripe_offset =
2997 (typeof(v1->lum_stripe_offset))(-1);
2998 lp->ldo_dir_def_hash_type = LMV_HASH_TYPE_FNV_1A_64;
2999 GOTO(unlock, rc = 0);
3003 v1 = info->lti_ea_store;
3005 lp->ldo_dir_def_stripenr = le32_to_cpu(v1->lum_stripe_count);
3006 lp->ldo_dir_def_stripe_offset = le32_to_cpu(v1->lum_stripe_offset);
3007 lp->ldo_dir_def_hash_type = le32_to_cpu(v1->lum_hash_type);
3008 lp->ldo_dir_def_striping_set = 1;
3009 lp->ldo_dir_def_striping_cached = 1;
3013 dt_write_unlock(env, dt_object_child(&lp->ldo_obj));
3018 * Cache default striping in the object.
3020 * To improve performance of striped object creation we cache default striping
3021 * (if it exists) in the parent directory object. We always cache default
3022 * striping for the regular files (stored in LOV EA) and we cache default
3023 * striping for the directories if requested by \a child_mode (when a new
3024 * directory is being created).
3026 * \param[in] env execution environment
3027 * \param[in] lp object
3028 * \param[in] child_mode new object's mode
3030 * \retval 0 on success
3031 * \retval negative if failed
3033 static int lod_cache_parent_striping(const struct lu_env *env,
3034 struct lod_object *lp,
3040 if (!lp->ldo_def_striping_cached) {
3041 /* we haven't tried to get default striping for
3042 * the directory yet, let's cache it in the object */
3043 rc = lod_cache_parent_lov_striping(env, lp);
3048 /* If the parent is on the remote MDT, we should always
3049 * try to refresh the default stripeEA cache, because we
3050 * do not cache default striping information for remote
3052 if (S_ISDIR(child_mode) && (!lp->ldo_dir_def_striping_cached ||
3053 dt_object_remote(&lp->ldo_obj)))
3054 rc = lod_cache_parent_lmv_striping(env, lp);
3060 * Implementation of dt_object_operations::do_ah_init.
3062 * This method is used to make a decision on the striping configuration for the
3063 * object being created. It can be taken from the \a parent object if it exists,
3064 * or filesystem's default. The resulting configuration (number of stripes,
3065 * stripe size/offset, pool name, etc) is stored in the object itself and will
3066 * be used by the methods like ->doo_declare_create().
3068 * \see dt_object_operations::do_ah_init() in the API description for details.
3070 static void lod_ah_init(const struct lu_env *env,
3071 struct dt_allocation_hint *ah,
3072 struct dt_object *parent,
3073 struct dt_object *child,
3076 struct lod_device *d = lu2lod_dev(child->do_lu.lo_dev);
3077 struct dt_object *nextp = NULL;
3078 struct dt_object *nextc;
3079 struct lod_object *lp = NULL;
3080 struct lod_object *lc;
3081 struct lov_desc *desc;
3087 if (likely(parent)) {
3088 nextp = dt_object_child(parent);
3089 lp = lod_dt_obj(parent);
3090 rc = lod_load_striping(env, lp);
3095 nextc = dt_object_child(child);
3096 lc = lod_dt_obj(child);
3098 LASSERT(lc->ldo_stripenr == 0);
3099 LASSERT(lc->ldo_stripe == NULL);
3102 * local object may want some hints
3103 * in case of late striping creation, ->ah_init()
3104 * can be called with local object existing
3106 if (!dt_object_exists(nextc) || dt_object_remote(nextc)) {
3107 struct dt_object *obj;
3109 obj = (nextp != NULL && dt_object_remote(nextp)) ? NULL : nextp;
3110 nextc->do_ops->do_ah_init(env, ah, obj, nextc, child_mode);
3113 if (S_ISDIR(child_mode)) {
3114 if (lc->ldo_dir_stripe == NULL) {
3115 OBD_ALLOC_PTR(lc->ldo_dir_stripe);
3116 if (lc->ldo_dir_stripe == NULL)
3120 LASSERT(lp != NULL);
3121 if (lp->ldo_dir_stripe == NULL) {
3122 OBD_ALLOC_PTR(lp->ldo_dir_stripe);
3123 if (lp->ldo_dir_stripe == NULL)
3127 rc = lod_cache_parent_striping(env, lp, child_mode);
3131 /* transfer defaults to new directory */
3132 if (lp->ldo_def_striping_set) {
3134 lod_object_set_pool(lc, lp->ldo_pool);
3135 lc->ldo_def_stripenr = lp->ldo_def_stripenr;
3136 lc->ldo_def_stripe_size = lp->ldo_def_stripe_size;
3137 lc->ldo_def_stripe_offset = lp->ldo_def_stripe_offset;
3138 lc->ldo_def_striping_set = 1;
3139 lc->ldo_def_striping_cached = 1;
3140 CDEBUG(D_OTHER, "inherite EA sz:%d off:%d nr:%d\n",
3141 (int)lc->ldo_def_stripe_size,
3142 (int)lc->ldo_def_stripe_offset,
3143 (int)lc->ldo_def_stripenr);
3146 /* transfer dir defaults to new directory */
3147 if (lp->ldo_dir_def_striping_set) {
3148 lc->ldo_dir_def_stripenr = lp->ldo_dir_def_stripenr;
3149 lc->ldo_dir_def_stripe_offset =
3150 lp->ldo_dir_def_stripe_offset;
3151 lc->ldo_dir_def_hash_type =
3152 lp->ldo_dir_def_hash_type;
3153 lc->ldo_dir_def_striping_set = 1;
3154 lc->ldo_dir_def_striping_cached = 1;
3155 CDEBUG(D_INFO, "inherit default EA nr:%d off:%d t%u\n",
3156 (int)lc->ldo_dir_def_stripenr,
3157 (int)lc->ldo_dir_def_stripe_offset,
3158 lc->ldo_dir_def_hash_type);
3161 /* It should always honour the specified stripes */
3162 if (ah->dah_eadata != NULL && ah->dah_eadata_len != 0) {
3163 const struct lmv_user_md_v1 *lum1 = ah->dah_eadata;
3165 rc = lod_verify_md_striping(d, lum1);
3167 le32_to_cpu(lum1->lum_stripe_count) > 1) {
3168 /* Directory will be striped only if
3169 * stripe_count > 1 */
3171 le32_to_cpu(lum1->lum_stripe_count);
3172 lc->ldo_dir_stripe_offset =
3173 le32_to_cpu(lum1->lum_stripe_offset);
3174 lc->ldo_dir_hash_type =
3175 le32_to_cpu(lum1->lum_hash_type);
3176 CDEBUG(D_INFO, "set stripe EA nr:%hu off:%d\n",
3178 (int)lc->ldo_dir_stripe_offset);
3180 /* then check whether there is default stripes from parent */
3181 } else if (lp->ldo_dir_def_striping_set) {
3182 /* If there are default dir stripe from parent */
3183 lc->ldo_stripenr = lp->ldo_dir_def_stripenr;
3184 lc->ldo_dir_stripe_offset =
3185 lp->ldo_dir_def_stripe_offset;
3186 lc->ldo_dir_hash_type =
3187 lp->ldo_dir_def_hash_type;
3188 CDEBUG(D_INFO, "inherit EA nr:%hu off:%d\n",
3190 (int)lc->ldo_dir_stripe_offset);
3192 /* set default stripe for this directory */
3193 lc->ldo_stripenr = 0;
3194 lc->ldo_dir_stripe_offset = -1;
3197 CDEBUG(D_INFO, "final striping count:%hu, offset:%d\n",
3198 lc->ldo_stripenr, (int)lc->ldo_dir_stripe_offset);
3204 * if object is going to be striped over OSTs, transfer default
3205 * striping information to the child, so that we can use it
3206 * during declaration and creation
3208 if (!lod_object_will_be_striped(S_ISREG(child_mode),
3209 lu_object_fid(&child->do_lu)))
3212 * try from the parent
3214 if (likely(parent)) {
3215 lod_cache_parent_striping(env, lp, child_mode);
3217 lc->ldo_def_stripe_offset = LOV_OFFSET_DEFAULT;
3219 if (lp->ldo_def_striping_set) {
3221 lod_object_set_pool(lc, lp->ldo_pool);
3222 lc->ldo_stripenr = lp->ldo_def_stripenr;
3223 lc->ldo_stripe_size = lp->ldo_def_stripe_size;
3224 lc->ldo_def_stripe_offset = lp->ldo_def_stripe_offset;
3225 CDEBUG(D_OTHER, "striping from parent: #%d, sz %d %s\n",
3226 lc->ldo_stripenr, lc->ldo_stripe_size,
3227 lp->ldo_pool ? lp->ldo_pool : "");
3232 * if the parent doesn't provide with specific pattern, grab fs-wide one
3234 desc = &d->lod_desc;
3235 if (lc->ldo_stripenr == 0)
3236 lc->ldo_stripenr = desc->ld_default_stripe_count;
3237 if (lc->ldo_stripe_size == 0)
3238 lc->ldo_stripe_size = desc->ld_default_stripe_size;
3239 CDEBUG(D_OTHER, "final striping: # %d stripes, sz %d from %s\n",
3240 lc->ldo_stripenr, lc->ldo_stripe_size,
3241 lc->ldo_pool ? lc->ldo_pool : "");
3244 /* we do not cache stripe information for slave stripe, see
3245 * lod_xattr_set_lov_on_dir */
3246 if (lp != NULL && lp->ldo_dir_slave_stripe)
3247 lod_lov_stripe_cache_clear(lp);
3252 #define ll_do_div64(aaa,bbb) do_div((aaa), (bbb))
3254 * Size initialization on late striping.
3256 * Propagate the size of a truncated object to a deferred striping.
3257 * This function handles a special case when truncate was done on a
3258 * non-striped object and now while the striping is being created
3259 * we can't lose that size, so we have to propagate it to the stripes
3262 * \param[in] env execution environment
3263 * \param[in] dt object
3264 * \param[in] th transaction handle
3266 * \retval 0 on success
3267 * \retval negative if failed
3269 static int lod_declare_init_size(const struct lu_env *env,
3270 struct dt_object *dt, struct thandle *th)
3272 struct dt_object *next = dt_object_child(dt);
3273 struct lod_object *lo = lod_dt_obj(dt);
3274 struct lu_attr *attr = &lod_env_info(env)->lti_attr;
3275 uint64_t size, offs;
3279 /* XXX: we support the simplest (RAID0) striping so far */
3280 LASSERT(lo->ldo_stripe || lo->ldo_stripenr == 0);
3281 LASSERT(lo->ldo_stripe_size > 0);
3283 rc = dt_attr_get(env, next, attr);
3284 LASSERT(attr->la_valid & LA_SIZE);
3288 size = attr->la_size;
3292 /* ll_do_div64(a, b) returns a % b, and a = a / b */
3293 ll_do_div64(size, (__u64) lo->ldo_stripe_size);
3294 stripe = ll_do_div64(size, (__u64) lo->ldo_stripenr);
3296 size = size * lo->ldo_stripe_size;
3297 offs = attr->la_size;
3298 size += ll_do_div64(offs, lo->ldo_stripe_size);
3300 attr->la_valid = LA_SIZE;
3301 attr->la_size = size;
3303 rc = lod_sub_object_declare_attr_set(env, lo->ldo_stripe[stripe], attr,
3310 * Declare creation of striped object.
3312 * The function declares creation stripes for a regular object. The function
3313 * also declares whether the stripes will be created with non-zero size if
3314 * previously size was set non-zero on the master object. If object \a dt is
3315 * not local, then only fully defined striping can be applied in \a lovea.
3316 * Otherwise \a lovea can be in the form of pattern, see lod_qos_parse_config()
3319 * \param[in] env execution environment
3320 * \param[in] dt object
3321 * \param[in] attr attributes the stripes will be created with
3322 * \param[in] lovea a buffer containing striping description
3323 * \param[in] th transaction handle
3325 * \retval 0 on success
3326 * \retval negative if failed
3328 int lod_declare_striped_object(const struct lu_env *env, struct dt_object *dt,
3329 struct lu_attr *attr,
3330 const struct lu_buf *lovea, struct thandle *th)
3332 struct lod_thread_info *info = lod_env_info(env);
3333 struct dt_object *next = dt_object_child(dt);
3334 struct lod_object *lo = lod_dt_obj(dt);
3338 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_ALLOC_OBDO)) {
3339 /* failed to create striping, let's reset
3340 * config so that others don't get confused */
3341 lod_object_free_striping(env, lo);
3342 GOTO(out, rc = -ENOMEM);
3345 if (!dt_object_remote(next)) {
3346 /* choose OST and generate appropriate objects */
3347 rc = lod_qos_prep_create(env, lo, attr, lovea, th);
3349 /* failed to create striping, let's reset
3350 * config so that others don't get confused */
3351 lod_object_free_striping(env, lo);
3356 * declare storage for striping data
3358 info->lti_buf.lb_len = lov_mds_md_size(lo->ldo_stripenr,
3359 lo->ldo_pool ? LOV_MAGIC_V3 : LOV_MAGIC_V1);
3361 /* LOD can not choose OST objects for remote objects, i.e.
3362 * stripes must be ready before that. Right now, it can only
3363 * happen during migrate, i.e. migrate process needs to create
3364 * remote regular file (mdd_migrate_create), then the migrate
3365 * process will provide stripeEA. */
3366 LASSERT(lovea != NULL);
3367 info->lti_buf = *lovea;
3370 rc = lod_sub_object_declare_xattr_set(env, next, &info->lti_buf,
3371 XATTR_NAME_LOV, 0, th);
3376 * if striping is created with local object's size > 0,
3377 * we have to propagate this size to specific object
3378 * the case is possible only when local object was created previously
3380 if (dt_object_exists(next))
3381 rc = lod_declare_init_size(env, dt, th);
3388 * Implementation of dt_object_operations::do_declare_create.
3390 * The method declares creation of a new object. If the object will be striped,
3391 * then helper functions are called to find FIDs for the stripes, declare
3392 * creation of the stripes and declare initialization of the striping
3393 * information to be stored in the master object.
3395 * \see dt_object_operations::do_declare_create() in the API description
3398 static int lod_declare_object_create(const struct lu_env *env,
3399 struct dt_object *dt,
3400 struct lu_attr *attr,
3401 struct dt_allocation_hint *hint,
3402 struct dt_object_format *dof,
3405 struct dt_object *next = dt_object_child(dt);
3406 struct lod_object *lo = lod_dt_obj(dt);
3415 * first of all, we declare creation of local object
3417 rc = lod_sub_object_declare_create(env, next, attr, hint, dof, th);
3421 if (dof->dof_type == DFT_SYM)
3422 dt->do_body_ops = &lod_body_lnk_ops;
3425 * it's lod_ah_init() that has decided the object will be striped
3427 if (dof->dof_type == DFT_REGULAR) {
3428 /* callers don't want stripes */
3429 /* XXX: all tricky interactions with ->ah_make_hint() decided
3430 * to use striping, then ->declare_create() behaving differently
3431 * should be cleaned */
3432 if (dof->u.dof_reg.striped == 0)
3433 lo->ldo_stripenr = 0;
3434 if (lo->ldo_stripenr > 0)
3435 rc = lod_declare_striped_object(env, dt, attr,
3437 } else if (dof->dof_type == DFT_DIR) {
3438 struct seq_server_site *ss;
3440 ss = lu_site2seq(dt->do_lu.lo_dev->ld_site);
3442 /* If the parent has default stripeEA, and client
3443 * did not find it before sending create request,
3444 * then MDT will return -EREMOTE, and client will
3445 * retrieve the default stripeEA and re-create the
3448 * Note: if dah_eadata != NULL, it means creating the
3449 * striped directory with specified stripeEA, then it
3450 * should ignore the default stripeEA */
3451 if ((hint == NULL || hint->dah_eadata == NULL) &&
3452 lo->ldo_dir_stripe_offset != -1 &&
3453 lo->ldo_dir_stripe_offset != ss->ss_node_id)
3454 GOTO(out, rc = -EREMOTE);
3456 /* Orphan object (like migrating object) does not have
3457 * lod_dir_stripe, see lod_ah_init */
3458 if (lo->ldo_dir_stripe != NULL)
3459 rc = lod_declare_dir_striping_create(env, dt, attr,
3467 * Creation of a striped regular object.
3469 * The function is called to create the stripe objects for a regular
3470 * striped file. This can happen at the initial object creation or
3471 * when the caller asks LOD to do so using ->do_xattr_set() method
3472 * (so called late striping). Notice all the information are already
3473 * prepared in the form of the list of objects (ldo_stripe field).
3474 * This is done during declare phase.
3476 * \param[in] env execution environment
3477 * \param[in] dt object
3478 * \param[in] attr attributes the stripes will be created with
3479 * \param[in] dof format of stripes (see OSD API description)
3480 * \param[in] th transaction handle
3482 * \retval 0 on success
3483 * \retval negative if failed
3485 int lod_striping_create(const struct lu_env *env, struct dt_object *dt,
3486 struct lu_attr *attr, struct dt_object_format *dof,
3489 struct lod_object *lo = lod_dt_obj(dt);
3493 LASSERT(lo->ldo_striping_cached == 0);
3495 /* create all underlying objects */
3496 for (i = 0; i < lo->ldo_stripenr; i++) {
3497 LASSERT(lo->ldo_stripe[i]);
3498 rc = lod_sub_object_create(env, lo->ldo_stripe[i], attr, NULL,
3505 rc = lod_generate_and_set_lovea(env, lo, th);
3507 lo->ldo_striping_cached = 1;
3514 * Implementation of dt_object_operations::do_create.
3516 * If any of preceeding methods (like ->do_declare_create(),
3517 * ->do_ah_init(), etc) chose to create a striped object,
3518 * then this method will create the master and the stripes.
3520 * \see dt_object_operations::do_create() in the API description for details.
3522 static int lod_object_create(const struct lu_env *env, struct dt_object *dt,
3523 struct lu_attr *attr,
3524 struct dt_allocation_hint *hint,
3525 struct dt_object_format *dof, struct thandle *th)
3527 struct lod_object *lo = lod_dt_obj(dt);
3531 /* create local object */
3532 rc = lod_sub_object_create(env, dt_object_child(dt), attr, hint, dof,
3537 if (S_ISREG(dt->do_lu.lo_header->loh_attr) &&
3538 lo->ldo_stripe && dof->u.dof_reg.striped != 0)
3539 rc = lod_striping_create(env, dt, attr, dof, th);
3545 * Implementation of dt_object_operations::do_declare_destroy.
3547 * If the object is a striped directory, then the function declares reference
3548 * removal from the master object (this is an index) to the stripes and declares
3549 * destroy of all the stripes. In all the cases, it declares an intention to
3550 * destroy the object itself.
3552 * \see dt_object_operations::do_declare_destroy() in the API description
3555 static int lod_declare_object_destroy(const struct lu_env *env,
3556 struct dt_object *dt,
3559 struct dt_object *next = dt_object_child(dt);
3560 struct lod_object *lo = lod_dt_obj(dt);
3561 struct lod_thread_info *info = lod_env_info(env);
3562 char *stripe_name = info->lti_key;
3567 * load striping information, notice we don't do this when object
3568 * is being initialized as we don't need this information till
3569 * few specific cases like destroy, chown
3571 rc = lod_load_striping(env, lo);
3575 /* declare destroy for all underlying objects */
3576 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
3577 rc = next->do_ops->do_index_try(env, next,
3578 &dt_directory_features);
3582 for (i = 0; i < lo->ldo_stripenr; i++) {
3583 rc = lod_sub_object_declare_ref_del(env, next, th);
3587 snprintf(stripe_name, sizeof(info->lti_key), DFID":%d",
3588 PFID(lu_object_fid(&lo->ldo_stripe[i]->do_lu)),
3590 rc = lod_sub_object_declare_delete(env, next,
3591 (const struct dt_key *)stripe_name, th);
3598 * we declare destroy for the local object
3600 rc = lod_sub_object_declare_destroy(env, next, th);
3604 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ))
3607 /* declare destroy all striped objects */
3608 for (i = 0; i < lo->ldo_stripenr; i++) {
3609 if (lo->ldo_stripe[i] == NULL)
3612 if (S_ISDIR(dt->do_lu.lo_header->loh_attr))
3613 rc = lod_sub_object_declare_ref_del(env,
3614 lo->ldo_stripe[i], th);
3616 rc = lod_sub_object_declare_destroy(env, lo->ldo_stripe[i],
3626 * Implementation of dt_object_operations::do_destroy.
3628 * If the object is a striped directory, then the function removes references
3629 * from the master object (this is an index) to the stripes and destroys all
3630 * the stripes. In all the cases, the function destroys the object itself.
3632 * \see dt_object_operations::do_destroy() in the API description for details.
3634 static int lod_object_destroy(const struct lu_env *env,
3635 struct dt_object *dt, struct thandle *th)
3637 struct dt_object *next = dt_object_child(dt);
3638 struct lod_object *lo = lod_dt_obj(dt);
3639 struct lod_thread_info *info = lod_env_info(env);
3640 char *stripe_name = info->lti_key;
3645 /* destroy sub-stripe of master object */
3646 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
3647 rc = next->do_ops->do_index_try(env, next,
3648 &dt_directory_features);
3652 for (i = 0; i < lo->ldo_stripenr; i++) {
3653 rc = lod_sub_object_ref_del(env, next, th);
3657 snprintf(stripe_name, sizeof(info->lti_key), DFID":%d",
3658 PFID(lu_object_fid(&lo->ldo_stripe[i]->do_lu)),
3661 CDEBUG(D_INFO, DFID" delete stripe %s "DFID"\n",
3662 PFID(lu_object_fid(&dt->do_lu)), stripe_name,
3663 PFID(lu_object_fid(&lo->ldo_stripe[i]->do_lu)));
3665 rc = lod_sub_object_delete(env, next,
3666 (const struct dt_key *)stripe_name, th);
3672 rc = lod_sub_object_destroy(env, next, th);
3676 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ))
3679 /* destroy all striped objects */
3680 for (i = 0; i < lo->ldo_stripenr; i++) {
3681 if (likely(lo->ldo_stripe[i] != NULL) &&
3682 (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_SPEOBJ) ||
3683 i == cfs_fail_val)) {
3684 if (S_ISDIR(dt->do_lu.lo_header->loh_attr)) {
3685 dt_write_lock(env, lo->ldo_stripe[i],
3687 rc = lod_sub_object_ref_del(env,
3688 lo->ldo_stripe[i], th);
3689 dt_write_unlock(env, lo->ldo_stripe[i]);
3694 rc = lod_sub_object_destroy(env, lo->ldo_stripe[i], th);
3704 * Implementation of dt_object_operations::do_declare_ref_add.
3706 * \see dt_object_operations::do_declare_ref_add() in the API description
3709 static int lod_declare_ref_add(const struct lu_env *env,
3710 struct dt_object *dt, struct thandle *th)
3712 return lod_sub_object_declare_ref_add(env, dt_object_child(dt), th);
3716 * Implementation of dt_object_operations::do_ref_add.
3718 * \see dt_object_operations::do_ref_add() in the API description for details.
3720 static int lod_ref_add(const struct lu_env *env,
3721 struct dt_object *dt, struct thandle *th)
3723 return lod_sub_object_ref_add(env, dt_object_child(dt), th);
3727 * Implementation of dt_object_operations::do_declare_ref_del.
3729 * \see dt_object_operations::do_declare_ref_del() in the API description
3732 static int lod_declare_ref_del(const struct lu_env *env,
3733 struct dt_object *dt, struct thandle *th)
3735 return lod_sub_object_declare_ref_del(env, dt_object_child(dt), th);
3739 * Implementation of dt_object_operations::do_ref_del
3741 * \see dt_object_operations::do_ref_del() in the API description for details.
3743 static int lod_ref_del(const struct lu_env *env,
3744 struct dt_object *dt, struct thandle *th)
3746 return lod_sub_object_ref_del(env, dt_object_child(dt), th);
3750 * Implementation of dt_object_operations::do_object_sync.
3752 * \see dt_object_operations::do_object_sync() in the API description
3755 static int lod_object_sync(const struct lu_env *env, struct dt_object *dt,
3756 __u64 start, __u64 end)
3758 return dt_object_sync(env, dt_object_child(dt), start, end);
3761 struct lod_slave_locks {
3763 struct lustre_handle lsl_handle[0];
3767 * Release LDLM locks on the stripes of a striped directory.
3769 * Iterates over all the locks taken on the stripe objects and
3770 * release them using ->do_object_unlock() method.
3772 * \param[in] env execution environment
3773 * \param[in] dt striped object
3774 * \param[in] einfo lock description
3775 * \param[in] policy data describing requested lock
3777 * \retval 0 on success
3778 * \retval negative if failed
3780 static int lod_object_unlock_internal(const struct lu_env *env,
3781 struct dt_object *dt,
3782 struct ldlm_enqueue_info *einfo,
3783 ldlm_policy_data_t *policy)
3785 struct lod_object *lo = lod_dt_obj(dt);
3786 struct lod_slave_locks *slave_locks = einfo->ei_cbdata;
3791 if (slave_locks == NULL)
3794 for (i = 1; i < slave_locks->lsl_lock_count; i++) {
3795 if (lustre_handle_is_used(&slave_locks->lsl_handle[i])) {
3798 einfo->ei_cbdata = &slave_locks->lsl_handle[i];
3799 rc1 = dt_object_unlock(env, lo->ldo_stripe[i], einfo,
3802 rc = rc == 0 ? rc1 : rc;
3810 * Implementation of dt_object_operations::do_object_unlock.
3812 * Used to release LDLM lock(s).
3814 * \see dt_object_operations::do_object_unlock() in the API description
3817 static int lod_object_unlock(const struct lu_env *env, struct dt_object *dt,
3818 struct ldlm_enqueue_info *einfo,
3819 union ldlm_policy_data *policy)
3821 struct lod_object *lo = lod_dt_obj(dt);
3822 struct lod_slave_locks *slave_locks = einfo->ei_cbdata;
3823 int slave_locks_size;
3827 if (slave_locks == NULL)
3830 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr))
3833 rc = lod_load_striping(env, lo);
3837 /* Note: for remote lock for single stripe dir, MDT will cancel
3838 * the lock by lockh directly */
3839 if (lo->ldo_stripenr <= 1 && dt_object_remote(dt_object_child(dt)))
3842 /* Only cancel slave lock for striped dir */
3843 rc = lod_object_unlock_internal(env, dt, einfo, policy);
3845 slave_locks_size = sizeof(*slave_locks) + slave_locks->lsl_lock_count *
3846 sizeof(slave_locks->lsl_handle[0]);
3847 OBD_FREE(slave_locks, slave_locks_size);
3848 einfo->ei_cbdata = NULL;
3854 * Implementation of dt_object_operations::do_object_lock.
3856 * Used to get LDLM lock on the non-striped and striped objects.
3858 * \see dt_object_operations::do_object_lock() in the API description
3861 static int lod_object_lock(const struct lu_env *env,
3862 struct dt_object *dt,
3863 struct lustre_handle *lh,
3864 struct ldlm_enqueue_info *einfo,
3865 union ldlm_policy_data *policy)
3867 struct lod_object *lo = lod_dt_obj(dt);
3870 int slave_locks_size;
3871 struct lod_slave_locks *slave_locks = NULL;
3874 /* remote object lock */
3875 if (!einfo->ei_enq_slave) {
3876 LASSERT(dt_object_remote(dt));
3877 return dt_object_lock(env, dt_object_child(dt), lh, einfo,
3881 if (!S_ISDIR(dt->do_lu.lo_header->loh_attr))
3884 rc = lod_load_striping(env, lo);
3889 if (lo->ldo_stripenr <= 1)
3892 slave_locks_size = sizeof(*slave_locks) + lo->ldo_stripenr *
3893 sizeof(slave_locks->lsl_handle[0]);
3894 /* Freed in lod_object_unlock */
3895 OBD_ALLOC(slave_locks, slave_locks_size);
3896 if (slave_locks == NULL)
3898 slave_locks->lsl_lock_count = lo->ldo_stripenr;
3900 /* striped directory lock */
3901 for (i = 1; i < lo->ldo_stripenr; i++) {
3902 struct lustre_handle lockh;
3903 struct ldlm_res_id *res_id;
3905 res_id = &lod_env_info(env)->lti_res_id;
3906 fid_build_reg_res_name(lu_object_fid(&lo->ldo_stripe[i]->do_lu),
3908 einfo->ei_res_id = res_id;
3910 LASSERT(lo->ldo_stripe[i]);
3911 rc = dt_object_lock(env, lo->ldo_stripe[i], &lockh, einfo,
3915 slave_locks->lsl_handle[i] = lockh;
3918 einfo->ei_cbdata = slave_locks;
3921 if (rc != 0 && slave_locks != NULL) {
3922 einfo->ei_cbdata = slave_locks;
3923 lod_object_unlock_internal(env, dt, einfo, policy);
3924 OBD_FREE(slave_locks, slave_locks_size);
3925 einfo->ei_cbdata = NULL;
3931 struct dt_object_operations lod_obj_ops = {
3932 .do_read_lock = lod_object_read_lock,
3933 .do_write_lock = lod_object_write_lock,
3934 .do_read_unlock = lod_object_read_unlock,
3935 .do_write_unlock = lod_object_write_unlock,
3936 .do_write_locked = lod_object_write_locked,
3937 .do_attr_get = lod_attr_get,
3938 .do_declare_attr_set = lod_declare_attr_set,
3939 .do_attr_set = lod_attr_set,
3940 .do_xattr_get = lod_xattr_get,
3941 .do_declare_xattr_set = lod_declare_xattr_set,
3942 .do_xattr_set = lod_xattr_set,
3943 .do_declare_xattr_del = lod_declare_xattr_del,
3944 .do_xattr_del = lod_xattr_del,
3945 .do_xattr_list = lod_xattr_list,
3946 .do_ah_init = lod_ah_init,
3947 .do_declare_create = lod_declare_object_create,
3948 .do_create = lod_object_create,
3949 .do_declare_destroy = lod_declare_object_destroy,
3950 .do_destroy = lod_object_destroy,
3951 .do_index_try = lod_index_try,
3952 .do_declare_ref_add = lod_declare_ref_add,
3953 .do_ref_add = lod_ref_add,
3954 .do_declare_ref_del = lod_declare_ref_del,
3955 .do_ref_del = lod_ref_del,
3956 .do_object_sync = lod_object_sync,
3957 .do_object_lock = lod_object_lock,
3958 .do_object_unlock = lod_object_unlock,
3962 * Implementation of dt_body_operations::dbo_read.
3964 * \see dt_body_operations::dbo_read() in the API description for details.
3966 static ssize_t lod_read(const struct lu_env *env, struct dt_object *dt,
3967 struct lu_buf *buf, loff_t *pos)
3969 struct dt_object *next = dt_object_child(dt);
3970 return next->do_body_ops->dbo_read(env, next, buf, pos);
3974 * Implementation of dt_body_operations::dbo_declare_write.
3976 * \see dt_body_operations::dbo_declare_write() in the API description
3979 static ssize_t lod_declare_write(const struct lu_env *env,
3980 struct dt_object *dt,
3981 const struct lu_buf *buf, loff_t pos,
3984 return lod_sub_object_declare_write(env, dt_object_child(dt), buf, pos,
3989 * Implementation of dt_body_operations::dbo_write.
3991 * \see dt_body_operations::dbo_write() in the API description for details.
3993 static ssize_t lod_write(const struct lu_env *env, struct dt_object *dt,
3994 const struct lu_buf *buf, loff_t *pos,
3995 struct thandle *th, int iq)
3997 return lod_sub_object_write(env, dt_object_child(dt), buf, pos, th, iq);
4000 static const struct dt_body_operations lod_body_lnk_ops = {
4001 .dbo_read = lod_read,
4002 .dbo_declare_write = lod_declare_write,
4003 .dbo_write = lod_write
4007 * Implementation of lu_object_operations::loo_object_init.
4009 * The function determines the type and the index of the target device using
4010 * sequence of the object's FID. Then passes control down to the
4011 * corresponding device:
4012 * OSD for the local objects, OSP for remote
4014 * \see lu_object_operations::loo_object_init() in the API description
4017 static int lod_object_init(const struct lu_env *env, struct lu_object *lo,
4018 const struct lu_object_conf *conf)
4020 struct lod_device *lod = lu2lod_dev(lo->lo_dev);
4021 struct lu_device *cdev = NULL;
4022 struct lu_object *cobj;
4023 struct lod_tgt_descs *ltd = NULL;
4024 struct lod_tgt_desc *tgt;
4026 int type = LU_SEQ_RANGE_ANY;
4030 rc = lod_fld_lookup(env, lod, lu_object_fid(lo), &idx, &type);
4032 /* Note: Sometimes, it will Return EAGAIN here, see
4033 * ptrlpc_import_delay_req(), which might confuse
4034 * lu_object_find_at() and make it wait there incorrectly.
4035 * so we convert it to EIO here.*/
4042 if (type == LU_SEQ_RANGE_MDT &&
4043 idx == lu_site2seq(lo->lo_dev->ld_site)->ss_node_id) {
4044 cdev = &lod->lod_child->dd_lu_dev;
4045 } else if (type == LU_SEQ_RANGE_MDT) {
4046 ltd = &lod->lod_mdt_descs;
4048 } else if (type == LU_SEQ_RANGE_OST) {
4049 ltd = &lod->lod_ost_descs;
4056 if (ltd->ltd_tgts_size > idx &&
4057 cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx)) {
4058 tgt = LTD_TGT(ltd, idx);
4060 LASSERT(tgt != NULL);
4061 LASSERT(tgt->ltd_tgt != NULL);
4063 cdev = &(tgt->ltd_tgt->dd_lu_dev);
4065 lod_putref(lod, ltd);
4068 if (unlikely(cdev == NULL))
4071 cobj = cdev->ld_ops->ldo_object_alloc(env, lo->lo_header, cdev);
4072 if (unlikely(cobj == NULL))
4075 lu_object_add(lo, cobj);
4082 * Release resources associated with striping.
4084 * If the object is striped (regular or directory), then release
4085 * the stripe objects references and free the ldo_stripe array.
4087 * \param[in] env execution environment
4088 * \param[in] lo object
4090 void lod_object_free_striping(const struct lu_env *env, struct lod_object *lo)
4094 if (lo->ldo_dir_stripe != NULL) {
4095 OBD_FREE_PTR(lo->ldo_dir_stripe);
4096 lo->ldo_dir_stripe = NULL;
4099 if (lo->ldo_stripe) {
4100 LASSERT(lo->ldo_stripes_allocated > 0);
4102 for (i = 0; i < lo->ldo_stripenr; i++) {
4103 if (lo->ldo_stripe[i])
4104 lu_object_put(env, &lo->ldo_stripe[i]->do_lu);
4107 i = sizeof(struct dt_object *) * lo->ldo_stripes_allocated;
4108 OBD_FREE(lo->ldo_stripe, i);
4109 lo->ldo_stripe = NULL;
4110 lo->ldo_stripes_allocated = 0;
4112 lo->ldo_striping_cached = 0;
4113 lo->ldo_stripenr = 0;
4114 lo->ldo_pattern = 0;
4118 * Implementation of lu_object_operations::loo_object_start.
4120 * \see lu_object_operations::loo_object_start() in the API description
4123 static int lod_object_start(const struct lu_env *env, struct lu_object *o)
4125 if (S_ISLNK(o->lo_header->loh_attr & S_IFMT))
4126 lu2lod_obj(o)->ldo_obj.do_body_ops = &lod_body_lnk_ops;
4131 * Implementation of lu_object_operations::loo_object_free.
4133 * \see lu_object_operations::loo_object_free() in the API description
4136 static void lod_object_free(const struct lu_env *env, struct lu_object *o)
4138 struct lod_object *mo = lu2lod_obj(o);
4141 * release all underlying object pinned
4144 lod_object_free_striping(env, mo);
4146 lod_object_set_pool(mo, NULL);
4149 OBD_SLAB_FREE_PTR(mo, lod_object_kmem);
4153 * Implementation of lu_object_operations::loo_object_release.
4155 * \see lu_object_operations::loo_object_release() in the API description
4158 static void lod_object_release(const struct lu_env *env, struct lu_object *o)
4160 /* XXX: shouldn't we release everything here in case if object
4161 * creation failed before? */
4165 * Implementation of lu_object_operations::loo_object_print.
4167 * \see lu_object_operations::loo_object_print() in the API description
4170 static int lod_object_print(const struct lu_env *env, void *cookie,
4171 lu_printer_t p, const struct lu_object *l)
4173 struct lod_object *o = lu2lod_obj((struct lu_object *) l);
4175 return (*p)(env, cookie, LUSTRE_LOD_NAME"-object@%p", o);
4178 struct lu_object_operations lod_lu_obj_ops = {
4179 .loo_object_init = lod_object_init,
4180 .loo_object_start = lod_object_start,
4181 .loo_object_free = lod_object_free,
4182 .loo_object_release = lod_object_release,
4183 .loo_object_print = lod_object_print,