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, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/obdclass/dt_object.c
39 * Generic functions from dt_object.h
41 * Author: Nikita Danilov <nikita@clusterfs.com>
44 #define DEBUG_SUBSYSTEM S_CLASS
47 #include <dt_object.h>
48 #include <libcfs/list.h>
50 #include <lustre_fid.h>
52 #include <lustre_quota.h>
54 /* context key constructor/destructor: dt_global_key_init, dt_global_key_fini */
55 LU_KEY_INIT(dt_global, struct dt_thread_info);
56 LU_KEY_FINI(dt_global, struct dt_thread_info);
58 struct lu_context_key dt_key = {
59 .lct_tags = LCT_MD_THREAD | LCT_DT_THREAD | LCT_MG_THREAD | LCT_LOCAL,
60 .lct_init = dt_global_key_init,
61 .lct_fini = dt_global_key_fini
63 EXPORT_SYMBOL(dt_key);
65 /* no lock is necessary to protect the list, because call-backs
66 * are added during system startup. Please refer to "struct dt_device".
68 void dt_txn_callback_add(struct dt_device *dev, struct dt_txn_callback *cb)
70 cfs_list_add(&cb->dtc_linkage, &dev->dd_txn_callbacks);
72 EXPORT_SYMBOL(dt_txn_callback_add);
74 void dt_txn_callback_del(struct dt_device *dev, struct dt_txn_callback *cb)
76 cfs_list_del_init(&cb->dtc_linkage);
78 EXPORT_SYMBOL(dt_txn_callback_del);
80 int dt_txn_hook_start(const struct lu_env *env,
81 struct dt_device *dev, struct thandle *th)
84 struct dt_txn_callback *cb;
89 cfs_list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) {
90 if (cb->dtc_txn_start == NULL ||
91 !(cb->dtc_tag & env->le_ctx.lc_tags))
93 rc = cb->dtc_txn_start(env, th, cb->dtc_cookie);
99 EXPORT_SYMBOL(dt_txn_hook_start);
101 int dt_txn_hook_stop(const struct lu_env *env, struct thandle *txn)
103 struct dt_device *dev = txn->th_dev;
104 struct dt_txn_callback *cb;
110 cfs_list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) {
111 if (cb->dtc_txn_stop == NULL ||
112 !(cb->dtc_tag & env->le_ctx.lc_tags))
114 rc = cb->dtc_txn_stop(env, txn, cb->dtc_cookie);
120 EXPORT_SYMBOL(dt_txn_hook_stop);
122 void dt_txn_hook_commit(struct thandle *txn)
124 struct dt_txn_callback *cb;
129 cfs_list_for_each_entry(cb, &txn->th_dev->dd_txn_callbacks,
131 if (cb->dtc_txn_commit)
132 cb->dtc_txn_commit(txn, cb->dtc_cookie);
135 EXPORT_SYMBOL(dt_txn_hook_commit);
137 int dt_device_init(struct dt_device *dev, struct lu_device_type *t)
140 CFS_INIT_LIST_HEAD(&dev->dd_txn_callbacks);
141 return lu_device_init(&dev->dd_lu_dev, t);
143 EXPORT_SYMBOL(dt_device_init);
145 void dt_device_fini(struct dt_device *dev)
147 lu_device_fini(&dev->dd_lu_dev);
149 EXPORT_SYMBOL(dt_device_fini);
151 int dt_object_init(struct dt_object *obj,
152 struct lu_object_header *h, struct lu_device *d)
155 return lu_object_init(&obj->do_lu, h, d);
157 EXPORT_SYMBOL(dt_object_init);
159 void dt_object_fini(struct dt_object *obj)
161 lu_object_fini(&obj->do_lu);
163 EXPORT_SYMBOL(dt_object_fini);
165 int dt_try_as_dir(const struct lu_env *env, struct dt_object *obj)
167 if (obj->do_index_ops == NULL)
168 obj->do_ops->do_index_try(env, obj, &dt_directory_features);
169 return obj->do_index_ops != NULL;
171 EXPORT_SYMBOL(dt_try_as_dir);
173 enum dt_format_type dt_mode_to_dft(__u32 mode)
175 enum dt_format_type result;
177 switch (mode & S_IFMT) {
182 result = DFT_REGULAR;
199 EXPORT_SYMBOL(dt_mode_to_dft);
202 * lookup fid for object named \a name in directory \a dir.
205 int dt_lookup_dir(const struct lu_env *env, struct dt_object *dir,
206 const char *name, struct lu_fid *fid)
208 if (dt_try_as_dir(env, dir))
209 return dt_lookup(env, dir, (struct dt_rec *)fid,
210 (const struct dt_key *)name, BYPASS_CAPA);
213 EXPORT_SYMBOL(dt_lookup_dir);
215 /* this differs from dt_locate by top_dev as parameter
216 * but not one from lu_site */
217 struct dt_object *dt_locate_at(const struct lu_env *env,
218 struct dt_device *dev,
219 const struct lu_fid *fid,
220 struct lu_device *top_dev,
221 const struct lu_object_conf *conf)
223 struct lu_object *lo;
226 lo = lu_object_find_at(env, top_dev, fid, conf);
228 return ERR_PTR(PTR_ERR(lo));
232 list_for_each_entry(n, &lo->lo_header->loh_layers, lo_linkage) {
233 if (n->lo_dev == &dev->dd_lu_dev)
234 return container_of0(n, struct dt_object, do_lu);
237 return ERR_PTR(-ENOENT);
239 EXPORT_SYMBOL(dt_locate_at);
242 * find a object named \a entry in given \a dfh->dfh_o directory.
244 static int dt_find_entry(const struct lu_env *env, const char *entry, void *data)
246 struct dt_find_hint *dfh = data;
247 struct dt_device *dt = dfh->dfh_dt;
248 struct lu_fid *fid = dfh->dfh_fid;
249 struct dt_object *obj = dfh->dfh_o;
252 result = dt_lookup_dir(env, obj, entry, fid);
253 lu_object_put(env, &obj->do_lu);
255 obj = dt_locate(env, dt, fid);
257 result = PTR_ERR(obj);
264 * Abstract function which parses path name. This function feeds
265 * path component to \a entry_func.
267 int dt_path_parser(const struct lu_env *env,
268 char *path, dt_entry_func_t entry_func,
275 e = strsep(&path, "/");
280 if (!path || path[0] == '\0')
284 rc = entry_func(env, e, data);
293 dt_store_resolve(const struct lu_env *env, struct dt_device *dt,
294 const char *path, struct lu_fid *fid)
296 struct dt_thread_info *info = dt_info(env);
297 struct dt_find_hint *dfh = &info->dti_dfh;
298 struct dt_object *obj;
299 char *local = info->dti_buf;
306 strncpy(local, path, DT_MAX_PATH);
307 local[DT_MAX_PATH - 1] = '\0';
309 result = dt->dd_ops->dt_root_get(env, dt, fid);
311 obj = dt_locate(env, dt, fid);
314 result = dt_path_parser(env, local, dt_find_entry, dfh);
316 obj = ERR_PTR(result);
321 obj = ERR_PTR(result);
325 EXPORT_SYMBOL(dt_store_resolve);
327 static struct dt_object *dt_reg_open(const struct lu_env *env,
328 struct dt_device *dt,
336 result = dt_lookup_dir(env, p, name, fid);
338 o = dt_locate(env, dt, fid);
347 * Open dt object named \a filename from \a dirname directory.
348 * \param dt dt device
349 * \param fid on success, object fid is stored in *fid
351 struct dt_object *dt_store_open(const struct lu_env *env,
352 struct dt_device *dt,
354 const char *filename,
357 struct dt_object *file;
358 struct dt_object *dir;
360 dir = dt_store_resolve(env, dt, dirname, fid);
362 file = dt_reg_open(env, dt, dir,
364 lu_object_put(env, &dir->do_lu);
370 EXPORT_SYMBOL(dt_store_open);
372 struct dt_object *dt_find_or_create(const struct lu_env *env,
373 struct dt_device *dt,
374 const struct lu_fid *fid,
375 struct dt_object_format *dof,
378 struct dt_object *dto;
384 dto = dt_locate(env, dt, fid);
388 LASSERT(dto != NULL);
389 if (dt_object_exists(dto))
392 th = dt_trans_create(env, dt);
394 GOTO(out, rc = PTR_ERR(th));
396 rc = dt_declare_create(env, dto, at, NULL, dof, th);
398 GOTO(trans_stop, rc);
400 rc = dt_trans_start_local(env, dt, th);
402 GOTO(trans_stop, rc);
404 dt_write_lock(env, dto, 0);
405 if (dt_object_exists(dto))
406 GOTO(unlock, rc = 0);
408 CDEBUG(D_OTHER, "create new object "DFID"\n", PFID(fid));
410 rc = dt_create(env, dto, at, NULL, dof, th);
413 LASSERT(dt_object_exists(dto));
415 dt_write_unlock(env, dto);
417 dt_trans_stop(env, dt, th);
420 lu_object_put(env, &dto->do_lu);
425 EXPORT_SYMBOL(dt_find_or_create);
427 /* dt class init function. */
428 int dt_global_init(void)
432 LU_CONTEXT_KEY_INIT(&dt_key);
433 result = lu_context_key_register(&dt_key);
437 void dt_global_fini(void)
439 lu_context_key_degister(&dt_key);
443 * Generic read helper. May return an error for partial reads.
445 * \param env lustre environment
446 * \param dt object to be read
447 * \param buf lu_buf to be filled, with buffer pointer and length
448 * \param pos position to start reading, updated as data is read
450 * \retval real size of data read
451 * \retval -ve errno on failure
453 int dt_read(const struct lu_env *env, struct dt_object *dt,
454 struct lu_buf *buf, loff_t *pos)
456 LASSERTF(dt != NULL, "dt is NULL when we want to read record\n");
457 return dt->do_body_ops->dbo_read(env, dt, buf, pos, BYPASS_CAPA);
459 EXPORT_SYMBOL(dt_read);
462 * Read structures of fixed size from storage. Unlike dt_read(), using
463 * dt_record_read() will return an error for partial reads.
465 * \param env lustre environment
466 * \param dt object to be read
467 * \param buf lu_buf to be filled, with buffer pointer and length
468 * \param pos position to start reading, updated as data is read
470 * \retval 0 on successfully reading full buffer
471 * \retval -EFAULT on short read
472 * \retval -ve errno on failure
474 int dt_record_read(const struct lu_env *env, struct dt_object *dt,
475 struct lu_buf *buf, loff_t *pos)
479 LASSERTF(dt != NULL, "dt is NULL when we want to read record\n");
481 rc = dt->do_body_ops->dbo_read(env, dt, buf, pos, BYPASS_CAPA);
483 if (rc == buf->lb_len)
489 EXPORT_SYMBOL(dt_record_read);
491 int dt_record_write(const struct lu_env *env, struct dt_object *dt,
492 const struct lu_buf *buf, loff_t *pos, struct thandle *th)
496 LASSERTF(dt != NULL, "dt is NULL when we want to write record\n");
498 LASSERT(dt->do_body_ops);
499 LASSERT(dt->do_body_ops->dbo_write);
500 rc = dt->do_body_ops->dbo_write(env, dt, buf, pos, th, BYPASS_CAPA, 1);
501 if (rc == buf->lb_len)
507 EXPORT_SYMBOL(dt_record_write);
509 int dt_declare_version_set(const struct lu_env *env, struct dt_object *o,
513 char *xname = XATTR_NAME_VERSION;
517 vbuf.lb_len = sizeof(dt_obj_version_t);
518 return dt_declare_xattr_set(env, o, &vbuf, xname, 0, th);
521 EXPORT_SYMBOL(dt_declare_version_set);
523 void dt_version_set(const struct lu_env *env, struct dt_object *o,
524 dt_obj_version_t version, struct thandle *th)
527 char *xname = XATTR_NAME_VERSION;
531 vbuf.lb_buf = &version;
532 vbuf.lb_len = sizeof(version);
534 rc = dt_xattr_set(env, o, &vbuf, xname, 0, th, BYPASS_CAPA);
536 CDEBUG(D_INODE, "Can't set version, rc %d\n", rc);
539 EXPORT_SYMBOL(dt_version_set);
541 dt_obj_version_t dt_version_get(const struct lu_env *env, struct dt_object *o)
544 char *xname = XATTR_NAME_VERSION;
545 dt_obj_version_t version;
549 vbuf.lb_buf = &version;
550 vbuf.lb_len = sizeof(version);
551 rc = dt_xattr_get(env, o, &vbuf, xname, BYPASS_CAPA);
552 if (rc != sizeof(version)) {
553 CDEBUG(D_INODE, "Can't get version, rc %d\n", rc);
558 EXPORT_SYMBOL(dt_version_get);
560 /* list of all supported index types */
563 const struct dt_index_features dt_directory_features;
564 EXPORT_SYMBOL(dt_directory_features);
567 const struct dt_index_features dt_otable_features;
568 EXPORT_SYMBOL(dt_otable_features);
571 const struct dt_index_features dt_lfsck_features = {
572 .dif_flags = DT_IND_UPDATE,
573 .dif_keysize_min = sizeof(struct lu_fid),
574 .dif_keysize_max = sizeof(struct lu_fid),
575 .dif_recsize_min = sizeof(__u8),
576 .dif_recsize_max = sizeof(__u8),
579 EXPORT_SYMBOL(dt_lfsck_features);
581 /* accounting indexes */
582 const struct dt_index_features dt_acct_features = {
583 .dif_flags = DT_IND_UPDATE,
584 .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */
585 .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */
586 .dif_recsize_min = sizeof(struct lquota_acct_rec), /* 16 bytes */
587 .dif_recsize_max = sizeof(struct lquota_acct_rec), /* 16 bytes */
590 EXPORT_SYMBOL(dt_acct_features);
592 /* global quota files */
593 const struct dt_index_features dt_quota_glb_features = {
594 .dif_flags = DT_IND_UPDATE,
595 /* a different key would have to be used for per-directory quota */
596 .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */
597 .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */
598 .dif_recsize_min = sizeof(struct lquota_glb_rec), /* 32 bytes */
599 .dif_recsize_max = sizeof(struct lquota_glb_rec), /* 32 bytes */
602 EXPORT_SYMBOL(dt_quota_glb_features);
604 /* slave quota files */
605 const struct dt_index_features dt_quota_slv_features = {
606 .dif_flags = DT_IND_UPDATE,
607 /* a different key would have to be used for per-directory quota */
608 .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */
609 .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */
610 .dif_recsize_min = sizeof(struct lquota_slv_rec), /* 8 bytes */
611 .dif_recsize_max = sizeof(struct lquota_slv_rec), /* 8 bytes */
614 EXPORT_SYMBOL(dt_quota_slv_features);
616 /* helper function returning what dt_index_features structure should be used
617 * based on the FID sequence. This is used by OBD_IDX_READ RPC */
618 static inline const struct dt_index_features *dt_index_feat_select(__u64 seq,
621 if (seq == FID_SEQ_QUOTA_GLB) {
622 /* global quota index */
624 /* global quota index should be a regular file */
625 return ERR_PTR(-ENOENT);
626 return &dt_quota_glb_features;
627 } else if (seq == FID_SEQ_QUOTA) {
628 /* quota slave index */
630 /* slave index should be a regular file */
631 return ERR_PTR(-ENOENT);
632 return &dt_quota_slv_features;
633 } else if (seq >= FID_SEQ_NORMAL) {
634 /* object is part of the namespace, verify that it is a
637 /* sorry, we can only deal with directory */
638 return ERR_PTR(-ENOTDIR);
639 return &dt_directory_features;
642 return ERR_PTR(-EOPNOTSUPP);
646 * Fill a lu_idxpage with key/record pairs read for transfer via OBD_IDX_READ
649 * \param env - is the environment passed by the caller
650 * \param lp - is a pointer to the lu_page to fill
651 * \param nob - is the maximum number of bytes that should be copied
652 * \param iops - is the index operation vector associated with the index object
653 * \param it - is a pointer to the current iterator
654 * \param attr - is the index attribute to pass to iops->rec()
655 * \param arg - is a pointer to the idx_info structure
657 static int dt_index_page_build(const struct lu_env *env, union lu_page *lp,
658 int nob, const struct dt_it_ops *iops,
659 struct dt_it *it, __u32 attr, void *arg)
661 struct idx_info *ii = (struct idx_info *)arg;
662 struct lu_idxpage *lip = &lp->lp_idx;
667 /* no support for variable key & record size for now */
668 LASSERT((ii->ii_flags & II_FL_VARKEY) == 0);
669 LASSERT((ii->ii_flags & II_FL_VARREC) == 0);
671 /* initialize the header of the new container */
672 memset(lip, 0, LIP_HDR_SIZE);
673 lip->lip_magic = LIP_MAGIC;
676 /* compute size needed to store a key/record pair */
677 size = ii->ii_recsize + ii->ii_keysize;
678 if ((ii->ii_flags & II_FL_NOHASH) == 0)
679 /* add hash if the client wants it */
680 size += sizeof(__u64);
682 entry = lip->lip_entries;
684 char *tmp_entry = entry;
688 /* fetch 64-bit hash value */
689 hash = iops->store(env, it);
690 ii->ii_hash_end = hash;
692 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_IDX_READ_BREAK)) {
693 if (lip->lip_nr != 0)
698 if (lip->lip_nr == 0)
699 GOTO(out, rc = -EINVAL);
703 if ((ii->ii_flags & II_FL_NOHASH) == 0) {
704 /* client wants to the 64-bit hash value associated with
706 memcpy(tmp_entry, &hash, sizeof(hash));
707 tmp_entry += sizeof(hash);
710 /* then the key value */
711 LASSERT(iops->key_size(env, it) == ii->ii_keysize);
712 key = iops->key(env, it);
713 memcpy(tmp_entry, key, ii->ii_keysize);
714 tmp_entry += ii->ii_keysize;
716 /* and finally the record */
717 rc = iops->rec(env, it, (struct dt_rec *)tmp_entry, attr);
722 /* hash/key/record successfully copied! */
724 if (unlikely(lip->lip_nr == 1 && ii->ii_count == 0))
725 ii->ii_hash_start = hash;
726 entry = tmp_entry + ii->ii_recsize;
730 /* move on to the next record */
732 rc = iops->next(env, it);
733 } while (rc == -ESTALE);
739 if (rc >= 0 && lip->lip_nr > 0)
740 /* one more container */
743 /* no more entries */
744 ii->ii_hash_end = II_END_OFF;
749 * Walk index and fill lu_page containers with key/record pairs
751 * \param env - is the environment passed by the caller
752 * \param obj - is the index object to parse
753 * \param rdpg - is the lu_rdpg descriptor associated with the transfer
754 * \param filler - is the callback function responsible for filling a lu_page
755 * with key/record pairs in the format wanted by the caller
756 * \param arg - is an opaq argument passed to the filler function
758 * \retval sum (in bytes) of all filled lu_pages
759 * \retval -ve errno on failure
761 int dt_index_walk(const struct lu_env *env, struct dt_object *obj,
762 const struct lu_rdpg *rdpg, dt_index_page_build_t filler,
766 const struct dt_it_ops *iops;
767 unsigned int pageidx, nob, nlupgs = 0;
771 LASSERT(rdpg->rp_pages != NULL);
772 LASSERT(obj->do_index_ops != NULL);
774 nob = rdpg->rp_count;
778 /* Iterate through index and fill containers from @rdpg */
779 iops = &obj->do_index_ops->dio_it;
780 LASSERT(iops != NULL);
781 it = iops->init(env, obj, rdpg->rp_attrs, BYPASS_CAPA);
785 rc = iops->load(env, it, rdpg->rp_hash);
788 * Iterator didn't find record with exactly the key requested.
790 * It is currently either
792 * - positioned above record with key less than
793 * requested---skip it.
794 * - or not positioned at all (is in IAM_IT_SKEWED
795 * state)---position it on the next item.
797 rc = iops->next(env, it);
802 /* Fill containers one after the other. There might be multiple
803 * containers per physical page.
805 * At this point and across for-loop:
806 * rc == 0 -> ok, proceed.
807 * rc > 0 -> end of index.
808 * rc < 0 -> error. */
809 for (pageidx = 0; rc == 0 && nob > 0; pageidx++) {
813 LASSERT(pageidx < rdpg->rp_npages);
814 lp = kmap(rdpg->rp_pages[pageidx]);
817 for (i = 0; i < LU_PAGE_COUNT; i++, lp++, nob -= LU_PAGE_SIZE) {
818 rc = filler(env, lp, min_t(int, nob, LU_PAGE_SIZE),
819 iops, it, rdpg->rp_attrs, arg);
822 /* one more lu_page */
828 kunmap(rdpg->rp_pages[i]);
835 rc = min_t(unsigned int, nlupgs * LU_PAGE_SIZE, rdpg->rp_count);
839 EXPORT_SYMBOL(dt_index_walk);
842 * Walk key/record pairs of an index and copy them into 4KB containers to be
843 * transferred over the network. This is the common handler for OBD_IDX_READ
846 * \param env - is the environment passed by the caller
847 * \param dev - is the dt_device storing the index
848 * \param ii - is the idx_info structure packed by the client in the
849 * OBD_IDX_READ request
850 * \param rdpg - is the lu_rdpg descriptor
852 * \retval on success, return sum (in bytes) of all filled containers
853 * \retval appropriate error otherwise.
855 int dt_index_read(const struct lu_env *env, struct dt_device *dev,
856 struct idx_info *ii, const struct lu_rdpg *rdpg)
858 const struct dt_index_features *feat;
859 struct dt_object *obj;
863 /* rp_count shouldn't be null and should be a multiple of the container
865 if (rdpg->rp_count <= 0 && (rdpg->rp_count & (LU_PAGE_SIZE - 1)) != 0)
868 if (fid_seq(&ii->ii_fid) >= FID_SEQ_NORMAL)
869 /* we don't support directory transfer via OBD_IDX_READ for the
873 if (!fid_is_quota(&ii->ii_fid))
874 /* block access to all local files except quota files */
877 /* lookup index object subject to the transfer */
878 obj = dt_locate(env, dev, &ii->ii_fid);
880 RETURN(PTR_ERR(obj));
881 if (dt_object_exists(obj) == 0)
882 GOTO(out, rc = -ENOENT);
884 /* fetch index features associated with index object */
885 feat = dt_index_feat_select(fid_seq(&ii->ii_fid),
886 lu_object_attr(&obj->do_lu));
888 GOTO(out, rc = PTR_ERR(feat));
890 /* load index feature if not done already */
891 if (obj->do_index_ops == NULL) {
892 rc = obj->do_ops->do_index_try(env, obj, feat);
897 /* fill ii_flags with supported index features */
898 ii->ii_flags &= II_FL_NOHASH;
900 ii->ii_keysize = feat->dif_keysize_max;
901 if ((feat->dif_flags & DT_IND_VARKEY) != 0) {
902 /* key size is variable */
903 ii->ii_flags |= II_FL_VARKEY;
904 /* we don't support variable key size for the time being */
905 GOTO(out, rc = -EOPNOTSUPP);
908 ii->ii_recsize = feat->dif_recsize_max;
909 if ((feat->dif_flags & DT_IND_VARREC) != 0) {
910 /* record size is variable */
911 ii->ii_flags |= II_FL_VARREC;
912 /* we don't support variable record size for the time being */
913 GOTO(out, rc = -EOPNOTSUPP);
916 if ((feat->dif_flags & DT_IND_NONUNQ) != 0)
917 /* key isn't necessarily unique */
918 ii->ii_flags |= II_FL_NONUNQ;
920 dt_read_lock(env, obj, 0);
921 /* fetch object version before walking the index */
922 ii->ii_version = dt_version_get(env, obj);
924 /* walk the index and fill lu_idxpages with key/record pairs */
925 rc = dt_index_walk(env, obj, rdpg, dt_index_page_build ,ii);
926 dt_read_unlock(env, obj);
930 LASSERT(ii->ii_count == 0);
931 ii->ii_hash_end = II_END_OFF;
936 lu_object_put(env, &obj->do_lu);
939 EXPORT_SYMBOL(dt_index_read);
942 #ifndef HAVE_ONLY_PROCFS_SEQ
943 int lprocfs_dt_rd_blksize(char *page, char **start, off_t off,
944 int count, int *eof, void *data)
946 struct dt_device *dt = data;
947 struct obd_statfs osfs;
949 int rc = dt_statfs(NULL, dt, &osfs);
952 rc = snprintf(page, count, "%u\n",
953 (unsigned) osfs.os_bsize);
958 EXPORT_SYMBOL(lprocfs_dt_rd_blksize);
960 int lprocfs_dt_rd_kbytestotal(char *page, char **start, off_t off,
961 int count, int *eof, void *data)
963 struct dt_device *dt = data;
964 struct obd_statfs osfs;
966 int rc = dt_statfs(NULL, dt, &osfs);
968 __u32 blk_size = osfs.os_bsize >> 10;
969 __u64 result = osfs.os_blocks;
971 while (blk_size >>= 1)
975 rc = snprintf(page, count, LPU64"\n", result);
980 EXPORT_SYMBOL(lprocfs_dt_rd_kbytestotal);
982 int lprocfs_dt_rd_kbytesfree(char *page, char **start, off_t off,
983 int count, int *eof, void *data)
985 struct dt_device *dt = data;
986 struct obd_statfs osfs;
988 int rc = dt_statfs(NULL, dt, &osfs);
990 __u32 blk_size = osfs.os_bsize >> 10;
991 __u64 result = osfs.os_bfree;
993 while (blk_size >>= 1)
997 rc = snprintf(page, count, LPU64"\n", result);
1002 EXPORT_SYMBOL(lprocfs_dt_rd_kbytesfree);
1004 int lprocfs_dt_rd_kbytesavail(char *page, char **start, off_t off,
1005 int count, int *eof, void *data)
1007 struct dt_device *dt = data;
1008 struct obd_statfs osfs;
1010 int rc = dt_statfs(NULL, dt, &osfs);
1012 __u32 blk_size = osfs.os_bsize >> 10;
1013 __u64 result = osfs.os_bavail;
1015 while (blk_size >>= 1)
1019 rc = snprintf(page, count, LPU64"\n", result);
1024 EXPORT_SYMBOL(lprocfs_dt_rd_kbytesavail);
1026 int lprocfs_dt_rd_filestotal(char *page, char **start, off_t off,
1027 int count, int *eof, void *data)
1029 struct dt_device *dt = data;
1030 struct obd_statfs osfs;
1032 int rc = dt_statfs(NULL, dt, &osfs);
1035 rc = snprintf(page, count, LPU64"\n", osfs.os_files);
1040 EXPORT_SYMBOL(lprocfs_dt_rd_filestotal);
1042 int lprocfs_dt_rd_filesfree(char *page, char **start, off_t off,
1043 int count, int *eof, void *data)
1045 struct dt_device *dt = data;
1046 struct obd_statfs osfs;
1048 int rc = dt_statfs(NULL, dt, &osfs);
1051 rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
1056 EXPORT_SYMBOL(lprocfs_dt_rd_filesfree);
1059 int lprocfs_dt_blksize_seq_show(struct seq_file *m, void *v)
1061 struct dt_device *dt = m->private;
1062 struct obd_statfs osfs;
1064 int rc = dt_statfs(NULL, dt, &osfs);
1066 seq_printf(m, "%u\n", (unsigned) osfs.os_bsize);
1069 EXPORT_SYMBOL(lprocfs_dt_blksize_seq_show);
1071 int lprocfs_dt_kbytestotal_seq_show(struct seq_file *m, void *v)
1073 struct dt_device *dt = m->private;
1074 struct obd_statfs osfs;
1076 int rc = dt_statfs(NULL, dt, &osfs);
1078 __u32 blk_size = osfs.os_bsize >> 10;
1079 __u64 result = osfs.os_blocks;
1081 while (blk_size >>= 1)
1084 seq_printf(m, LPU64"\n", result);
1088 EXPORT_SYMBOL(lprocfs_dt_kbytestotal_seq_show);
1090 int lprocfs_dt_kbytesfree_seq_show(struct seq_file *m, void *v)
1092 struct dt_device *dt = m->private;
1093 struct obd_statfs osfs;
1095 int rc = dt_statfs(NULL, dt, &osfs);
1097 __u32 blk_size = osfs.os_bsize >> 10;
1098 __u64 result = osfs.os_bfree;
1100 while (blk_size >>= 1)
1103 seq_printf(m, LPU64"\n", result);
1107 EXPORT_SYMBOL(lprocfs_dt_kbytesfree_seq_show);
1109 int lprocfs_dt_kbytesavail_seq_show(struct seq_file *m, void *v)
1111 struct dt_device *dt = m->private;
1112 struct obd_statfs osfs;
1114 int rc = dt_statfs(NULL, dt, &osfs);
1116 __u32 blk_size = osfs.os_bsize >> 10;
1117 __u64 result = osfs.os_bavail;
1119 while (blk_size >>= 1)
1122 seq_printf(m, LPU64"\n", result);
1126 EXPORT_SYMBOL(lprocfs_dt_kbytesavail_seq_show);
1128 int lprocfs_dt_filestotal_seq_show(struct seq_file *m, void *v)
1130 struct dt_device *dt = m->private;
1131 struct obd_statfs osfs;
1133 int rc = dt_statfs(NULL, dt, &osfs);
1135 seq_printf(m, LPU64"\n", osfs.os_files);
1138 EXPORT_SYMBOL(lprocfs_dt_filestotal_seq_show);
1140 int lprocfs_dt_filesfree_seq_show(struct seq_file *m, void *v)
1142 struct dt_device *dt = m->private;
1143 struct obd_statfs osfs;
1145 int rc = dt_statfs(NULL, dt, &osfs);
1147 seq_printf(m, LPU64"\n", osfs.os_ffree);
1150 EXPORT_SYMBOL(lprocfs_dt_filesfree_seq_show);
1152 #endif /* LPROCFS */