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, 2012, 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
46 #include "../include/obd.h"
47 #include "../include/dt_object.h"
48 #include <linux/list.h>
50 #include "../include/lustre_fid.h"
52 #include "../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 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 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 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 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 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 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, const struct lu_fid *fid,
219 struct lu_device *top_dev)
221 struct lu_object *lo, *n;
223 lo = lu_object_find_at(env, top_dev, fid, NULL);
229 list_for_each_entry(n, &lo->lo_header->loh_layers, lo_linkage) {
230 if (n->lo_dev == &dev->dd_lu_dev)
231 return container_of0(n, struct dt_object, do_lu);
233 return ERR_PTR(-ENOENT);
235 EXPORT_SYMBOL(dt_locate_at);
238 * find a object named \a entry in given \a dfh->dfh_o directory.
240 static int dt_find_entry(const struct lu_env *env, const char *entry, void *data)
242 struct dt_find_hint *dfh = data;
243 struct dt_device *dt = dfh->dfh_dt;
244 struct lu_fid *fid = dfh->dfh_fid;
245 struct dt_object *obj = dfh->dfh_o;
248 result = dt_lookup_dir(env, obj, entry, fid);
249 lu_object_put(env, &obj->do_lu);
251 obj = dt_locate(env, dt, fid);
253 result = PTR_ERR(obj);
260 * Abstract function which parses path name. This function feeds
261 * path component to \a entry_func.
263 int dt_path_parser(const struct lu_env *env,
264 char *path, dt_entry_func_t entry_func,
271 e = strsep(&path, "/");
276 if (!path || path[0] == '\0')
280 rc = entry_func(env, e, data);
289 dt_store_resolve(const struct lu_env *env, struct dt_device *dt,
290 const char *path, struct lu_fid *fid)
292 struct dt_thread_info *info = dt_info(env);
293 struct dt_find_hint *dfh = &info->dti_dfh;
294 struct dt_object *obj;
295 char *local = info->dti_buf;
302 strncpy(local, path, DT_MAX_PATH);
303 local[DT_MAX_PATH - 1] = '\0';
305 result = dt->dd_ops->dt_root_get(env, dt, fid);
307 obj = dt_locate(env, dt, fid);
310 result = dt_path_parser(env, local, dt_find_entry, dfh);
312 obj = ERR_PTR(result);
317 obj = ERR_PTR(result);
321 EXPORT_SYMBOL(dt_store_resolve);
323 static struct dt_object *dt_reg_open(const struct lu_env *env,
324 struct dt_device *dt,
332 result = dt_lookup_dir(env, p, name, fid);
334 o = dt_locate(env, dt, fid);
343 * Open dt object named \a filename from \a dirname directory.
344 * \param dt dt device
345 * \param fid on success, object fid is stored in *fid
347 struct dt_object *dt_store_open(const struct lu_env *env,
348 struct dt_device *dt,
350 const char *filename,
353 struct dt_object *file;
354 struct dt_object *dir;
356 dir = dt_store_resolve(env, dt, dirname, fid);
358 file = dt_reg_open(env, dt, dir,
360 lu_object_put(env, &dir->do_lu);
366 EXPORT_SYMBOL(dt_store_open);
368 struct dt_object *dt_find_or_create(const struct lu_env *env,
369 struct dt_device *dt,
370 const struct lu_fid *fid,
371 struct dt_object_format *dof,
374 struct dt_object *dto;
378 dto = dt_locate(env, dt, fid);
382 LASSERT(dto != NULL);
383 if (dt_object_exists(dto))
386 th = dt_trans_create(env, dt);
388 GOTO(out, rc = PTR_ERR(th));
390 rc = dt_declare_create(env, dto, at, NULL, dof, th);
392 GOTO(trans_stop, rc);
394 rc = dt_trans_start_local(env, dt, th);
396 GOTO(trans_stop, rc);
398 dt_write_lock(env, dto, 0);
399 if (dt_object_exists(dto))
400 GOTO(unlock, rc = 0);
402 CDEBUG(D_OTHER, "create new object "DFID"\n", PFID(fid));
404 rc = dt_create(env, dto, at, NULL, dof, th);
407 LASSERT(dt_object_exists(dto));
409 dt_write_unlock(env, dto);
411 dt_trans_stop(env, dt, th);
414 lu_object_put(env, &dto->do_lu);
419 EXPORT_SYMBOL(dt_find_or_create);
421 /* dt class init function. */
422 int dt_global_init(void)
426 LU_CONTEXT_KEY_INIT(&dt_key);
427 result = lu_context_key_register(&dt_key);
431 void dt_global_fini(void)
433 lu_context_key_degister(&dt_key);
437 * Generic read helper. May return an error for partial reads.
439 * \param env lustre environment
440 * \param dt object to be read
441 * \param buf lu_buf to be filled, with buffer pointer and length
442 * \param pos position to start reading, updated as data is read
444 * \retval real size of data read
445 * \retval -ve errno on failure
447 int dt_read(const struct lu_env *env, struct dt_object *dt,
448 struct lu_buf *buf, loff_t *pos)
450 LASSERTF(dt != NULL, "dt is NULL when we want to read record\n");
451 return dt->do_body_ops->dbo_read(env, dt, buf, pos, BYPASS_CAPA);
453 EXPORT_SYMBOL(dt_read);
456 * Read structures of fixed size from storage. Unlike dt_read(), using
457 * dt_record_read() will return an error for partial reads.
459 * \param env lustre environment
460 * \param dt object to be read
461 * \param buf lu_buf to be filled, with buffer pointer and length
462 * \param pos position to start reading, updated as data is read
464 * \retval 0 on successfully reading full buffer
465 * \retval -EFAULT on short read
466 * \retval -ve errno on failure
468 int dt_record_read(const struct lu_env *env, struct dt_object *dt,
469 struct lu_buf *buf, loff_t *pos)
473 LASSERTF(dt != NULL, "dt is NULL when we want to read record\n");
475 rc = dt->do_body_ops->dbo_read(env, dt, buf, pos, BYPASS_CAPA);
477 if (rc == buf->lb_len)
483 EXPORT_SYMBOL(dt_record_read);
485 int dt_record_write(const struct lu_env *env, struct dt_object *dt,
486 const struct lu_buf *buf, loff_t *pos, struct thandle *th)
490 LASSERTF(dt != NULL, "dt is NULL when we want to write record\n");
492 LASSERT(dt->do_body_ops);
493 LASSERT(dt->do_body_ops->dbo_write);
494 rc = dt->do_body_ops->dbo_write(env, dt, buf, pos, th, BYPASS_CAPA, 1);
495 if (rc == buf->lb_len)
501 EXPORT_SYMBOL(dt_record_write);
503 int dt_declare_version_set(const struct lu_env *env, struct dt_object *o,
507 char *xname = XATTR_NAME_VERSION;
511 vbuf.lb_len = sizeof(dt_obj_version_t);
512 return dt_declare_xattr_set(env, o, &vbuf, xname, 0, th);
515 EXPORT_SYMBOL(dt_declare_version_set);
517 void dt_version_set(const struct lu_env *env, struct dt_object *o,
518 dt_obj_version_t version, struct thandle *th)
521 char *xname = XATTR_NAME_VERSION;
525 vbuf.lb_buf = &version;
526 vbuf.lb_len = sizeof(version);
528 rc = dt_xattr_set(env, o, &vbuf, xname, 0, th, BYPASS_CAPA);
530 CDEBUG(D_INODE, "Can't set version, rc %d\n", rc);
533 EXPORT_SYMBOL(dt_version_set);
535 dt_obj_version_t dt_version_get(const struct lu_env *env, struct dt_object *o)
538 char *xname = XATTR_NAME_VERSION;
539 dt_obj_version_t version;
543 vbuf.lb_buf = &version;
544 vbuf.lb_len = sizeof(version);
545 rc = dt_xattr_get(env, o, &vbuf, xname, BYPASS_CAPA);
546 if (rc != sizeof(version)) {
547 CDEBUG(D_INODE, "Can't get version, rc %d\n", rc);
552 EXPORT_SYMBOL(dt_version_get);
554 /* list of all supported index types */
557 const struct dt_index_features dt_directory_features;
558 EXPORT_SYMBOL(dt_directory_features);
561 const struct dt_index_features dt_otable_features;
562 EXPORT_SYMBOL(dt_otable_features);
565 const struct dt_index_features dt_lfsck_features = {
566 .dif_flags = DT_IND_UPDATE,
567 .dif_keysize_min = sizeof(struct lu_fid),
568 .dif_keysize_max = sizeof(struct lu_fid),
569 .dif_recsize_min = sizeof(__u8),
570 .dif_recsize_max = sizeof(__u8),
573 EXPORT_SYMBOL(dt_lfsck_features);
575 /* accounting indexes */
576 const struct dt_index_features dt_acct_features = {
577 .dif_flags = DT_IND_UPDATE,
578 .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */
579 .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */
580 .dif_recsize_min = sizeof(struct lquota_acct_rec), /* 16 bytes */
581 .dif_recsize_max = sizeof(struct lquota_acct_rec), /* 16 bytes */
584 EXPORT_SYMBOL(dt_acct_features);
586 /* global quota files */
587 const struct dt_index_features dt_quota_glb_features = {
588 .dif_flags = DT_IND_UPDATE,
589 /* a different key would have to be used for per-directory quota */
590 .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */
591 .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */
592 .dif_recsize_min = sizeof(struct lquota_glb_rec), /* 32 bytes */
593 .dif_recsize_max = sizeof(struct lquota_glb_rec), /* 32 bytes */
596 EXPORT_SYMBOL(dt_quota_glb_features);
598 /* slave quota files */
599 const struct dt_index_features dt_quota_slv_features = {
600 .dif_flags = DT_IND_UPDATE,
601 /* a different key would have to be used for per-directory quota */
602 .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */
603 .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */
604 .dif_recsize_min = sizeof(struct lquota_slv_rec), /* 8 bytes */
605 .dif_recsize_max = sizeof(struct lquota_slv_rec), /* 8 bytes */
608 EXPORT_SYMBOL(dt_quota_slv_features);
610 /* helper function returning what dt_index_features structure should be used
611 * based on the FID sequence. This is used by OBD_IDX_READ RPC */
612 static inline const struct dt_index_features *dt_index_feat_select(__u64 seq,
615 if (seq == FID_SEQ_QUOTA_GLB) {
616 /* global quota index */
618 /* global quota index should be a regular file */
619 return ERR_PTR(-ENOENT);
620 return &dt_quota_glb_features;
621 } else if (seq == FID_SEQ_QUOTA) {
622 /* quota slave index */
624 /* slave index should be a regular file */
625 return ERR_PTR(-ENOENT);
626 return &dt_quota_slv_features;
627 } else if (seq >= FID_SEQ_NORMAL) {
628 /* object is part of the namespace, verify that it is a
631 /* sorry, we can only deal with directory */
632 return ERR_PTR(-ENOTDIR);
633 return &dt_directory_features;
636 return ERR_PTR(-EOPNOTSUPP);
640 * Fill a lu_idxpage with key/record pairs read for transfer via OBD_IDX_READ
643 * \param env - is the environment passed by the caller
644 * \param lp - is a pointer to the lu_page to fill
645 * \param nob - is the maximum number of bytes that should be copied
646 * \param iops - is the index operation vector associated with the index object
647 * \param it - is a pointer to the current iterator
648 * \param attr - is the index attribute to pass to iops->rec()
649 * \param arg - is a pointer to the idx_info structure
651 static int dt_index_page_build(const struct lu_env *env, union lu_page *lp,
652 int nob, const struct dt_it_ops *iops,
653 struct dt_it *it, __u32 attr, void *arg)
655 struct idx_info *ii = (struct idx_info *)arg;
656 struct lu_idxpage *lip = &lp->lp_idx;
660 /* no support for variable key & record size for now */
661 LASSERT((ii->ii_flags & II_FL_VARKEY) == 0);
662 LASSERT((ii->ii_flags & II_FL_VARREC) == 0);
664 /* initialize the header of the new container */
665 memset(lip, 0, LIP_HDR_SIZE);
666 lip->lip_magic = LIP_MAGIC;
669 /* compute size needed to store a key/record pair */
670 size = ii->ii_recsize + ii->ii_keysize;
671 if ((ii->ii_flags & II_FL_NOHASH) == 0)
672 /* add hash if the client wants it */
673 size += sizeof(__u64);
675 entry = lip->lip_entries;
677 char *tmp_entry = entry;
681 /* fetch 64-bit hash value */
682 hash = iops->store(env, it);
683 ii->ii_hash_end = hash;
685 if (OBD_FAIL_CHECK(OBD_FAIL_OBD_IDX_READ_BREAK)) {
686 if (lip->lip_nr != 0)
691 if (lip->lip_nr == 0)
692 GOTO(out, rc = -EINVAL);
696 if ((ii->ii_flags & II_FL_NOHASH) == 0) {
697 /* client wants to the 64-bit hash value associated with
699 memcpy(tmp_entry, &hash, sizeof(hash));
700 tmp_entry += sizeof(hash);
703 /* then the key value */
704 LASSERT(iops->key_size(env, it) == ii->ii_keysize);
705 key = iops->key(env, it);
706 memcpy(tmp_entry, key, ii->ii_keysize);
707 tmp_entry += ii->ii_keysize;
709 /* and finally the record */
710 rc = iops->rec(env, it, (struct dt_rec *)tmp_entry, attr);
715 /* hash/key/record successfully copied! */
717 if (unlikely(lip->lip_nr == 1 && ii->ii_count == 0))
718 ii->ii_hash_start = hash;
719 entry = tmp_entry + ii->ii_recsize;
723 /* move on to the next record */
725 rc = iops->next(env, it);
726 } while (rc == -ESTALE);
732 if (rc >= 0 && lip->lip_nr > 0)
733 /* one more container */
736 /* no more entries */
737 ii->ii_hash_end = II_END_OFF;
742 * Walk index and fill lu_page containers with key/record pairs
744 * \param env - is the environment passed by the caller
745 * \param obj - is the index object to parse
746 * \param rdpg - is the lu_rdpg descriptor associated with the transfer
747 * \param filler - is the callback function responsible for filling a lu_page
748 * with key/record pairs in the format wanted by the caller
749 * \param arg - is an opaq argument passed to the filler function
751 * \retval sum (in bytes) of all filled lu_pages
752 * \retval -ve errno on failure
754 int dt_index_walk(const struct lu_env *env, struct dt_object *obj,
755 const struct lu_rdpg *rdpg, dt_index_page_build_t filler,
759 const struct dt_it_ops *iops;
760 unsigned int pageidx, nob, nlupgs = 0;
763 LASSERT(rdpg->rp_pages != NULL);
764 LASSERT(obj->do_index_ops != NULL);
766 nob = rdpg->rp_count;
770 /* Iterate through index and fill containers from @rdpg */
771 iops = &obj->do_index_ops->dio_it;
772 LASSERT(iops != NULL);
773 it = iops->init(env, obj, rdpg->rp_attrs, BYPASS_CAPA);
777 rc = iops->load(env, it, rdpg->rp_hash);
780 * Iterator didn't find record with exactly the key requested.
782 * It is currently either
784 * - positioned above record with key less than
785 * requested---skip it.
786 * - or not positioned at all (is in IAM_IT_SKEWED
787 * state)---position it on the next item.
789 rc = iops->next(env, it);
794 /* Fill containers one after the other. There might be multiple
795 * containers per physical page.
797 * At this point and across for-loop:
798 * rc == 0 -> ok, proceed.
799 * rc > 0 -> end of index.
800 * rc < 0 -> error. */
801 for (pageidx = 0; rc == 0 && nob > 0; pageidx++) {
805 LASSERT(pageidx < rdpg->rp_npages);
806 lp = kmap(rdpg->rp_pages[pageidx]);
809 for (i = 0; i < LU_PAGE_COUNT; i++, lp++, nob -= LU_PAGE_SIZE) {
810 rc = filler(env, lp, min_t(int, nob, LU_PAGE_SIZE),
811 iops, it, rdpg->rp_attrs, arg);
814 /* one more lu_page */
820 kunmap(rdpg->rp_pages[i]);
827 rc = min_t(unsigned int, nlupgs * LU_PAGE_SIZE, rdpg->rp_count);
831 EXPORT_SYMBOL(dt_index_walk);
834 * Walk key/record pairs of an index and copy them into 4KB containers to be
835 * transferred over the network. This is the common handler for OBD_IDX_READ
838 * \param env - is the environment passed by the caller
839 * \param dev - is the dt_device storing the index
840 * \param ii - is the idx_info structure packed by the client in the
841 * OBD_IDX_READ request
842 * \param rdpg - is the lu_rdpg descriptor
844 * \retval on success, return sum (in bytes) of all filled containers
845 * \retval appropriate error otherwise.
847 int dt_index_read(const struct lu_env *env, struct dt_device *dev,
848 struct idx_info *ii, const struct lu_rdpg *rdpg)
850 const struct dt_index_features *feat;
851 struct dt_object *obj;
854 /* rp_count shouldn't be null and should be a multiple of the container
856 if (rdpg->rp_count <= 0 && (rdpg->rp_count & (LU_PAGE_SIZE - 1)) != 0)
859 if (fid_seq(&ii->ii_fid) >= FID_SEQ_NORMAL)
860 /* we don't support directory transfer via OBD_IDX_READ for the
864 if (!fid_is_quota(&ii->ii_fid))
865 /* block access to all local files except quota files */
868 /* lookup index object subject to the transfer */
869 obj = dt_locate(env, dev, &ii->ii_fid);
872 if (dt_object_exists(obj) == 0)
873 GOTO(out, rc = -ENOENT);
875 /* fetch index features associated with index object */
876 feat = dt_index_feat_select(fid_seq(&ii->ii_fid),
877 lu_object_attr(&obj->do_lu));
879 GOTO(out, rc = PTR_ERR(feat));
881 /* load index feature if not done already */
882 if (obj->do_index_ops == NULL) {
883 rc = obj->do_ops->do_index_try(env, obj, feat);
888 /* fill ii_flags with supported index features */
889 ii->ii_flags &= II_FL_NOHASH;
891 ii->ii_keysize = feat->dif_keysize_max;
892 if ((feat->dif_flags & DT_IND_VARKEY) != 0) {
893 /* key size is variable */
894 ii->ii_flags |= II_FL_VARKEY;
895 /* we don't support variable key size for the time being */
896 GOTO(out, rc = -EOPNOTSUPP);
899 ii->ii_recsize = feat->dif_recsize_max;
900 if ((feat->dif_flags & DT_IND_VARREC) != 0) {
901 /* record size is variable */
902 ii->ii_flags |= II_FL_VARREC;
903 /* we don't support variable record size for the time being */
904 GOTO(out, rc = -EOPNOTSUPP);
907 if ((feat->dif_flags & DT_IND_NONUNQ) != 0)
908 /* key isn't necessarily unique */
909 ii->ii_flags |= II_FL_NONUNQ;
911 dt_read_lock(env, obj, 0);
912 /* fetch object version before walking the index */
913 ii->ii_version = dt_version_get(env, obj);
915 /* walk the index and fill lu_idxpages with key/record pairs */
916 rc = dt_index_walk(env, obj, rdpg, dt_index_page_build ,ii);
917 dt_read_unlock(env, obj);
921 LASSERT(ii->ii_count == 0);
922 ii->ii_hash_end = II_END_OFF;
927 lu_object_put(env, &obj->do_lu);
930 EXPORT_SYMBOL(dt_index_read);
932 #if defined (CONFIG_PROC_FS)
934 int lprocfs_dt_rd_blksize(char *page, char **start, off_t off,
935 int count, int *eof, void *data)
937 struct dt_device *dt = data;
938 struct obd_statfs osfs;
940 int rc = dt_statfs(NULL, dt, &osfs);
943 rc = snprintf(page, count, "%u\n",
944 (unsigned) osfs.os_bsize);
949 EXPORT_SYMBOL(lprocfs_dt_rd_blksize);
951 int lprocfs_dt_rd_kbytestotal(char *page, char **start, off_t off,
952 int count, int *eof, void *data)
954 struct dt_device *dt = data;
955 struct obd_statfs osfs;
957 int rc = dt_statfs(NULL, dt, &osfs);
959 __u32 blk_size = osfs.os_bsize >> 10;
960 __u64 result = osfs.os_blocks;
962 while (blk_size >>= 1)
966 rc = snprintf(page, count, "%llu\n", result);
971 EXPORT_SYMBOL(lprocfs_dt_rd_kbytestotal);
973 int lprocfs_dt_rd_kbytesfree(char *page, char **start, off_t off,
974 int count, int *eof, void *data)
976 struct dt_device *dt = data;
977 struct obd_statfs osfs;
979 int rc = dt_statfs(NULL, dt, &osfs);
981 __u32 blk_size = osfs.os_bsize >> 10;
982 __u64 result = osfs.os_bfree;
984 while (blk_size >>= 1)
988 rc = snprintf(page, count, "%llu\n", result);
993 EXPORT_SYMBOL(lprocfs_dt_rd_kbytesfree);
995 int lprocfs_dt_rd_kbytesavail(char *page, char **start, off_t off,
996 int count, int *eof, void *data)
998 struct dt_device *dt = data;
999 struct obd_statfs osfs;
1001 int rc = dt_statfs(NULL, dt, &osfs);
1003 __u32 blk_size = osfs.os_bsize >> 10;
1004 __u64 result = osfs.os_bavail;
1006 while (blk_size >>= 1)
1010 rc = snprintf(page, count, "%llu\n", result);
1015 EXPORT_SYMBOL(lprocfs_dt_rd_kbytesavail);
1017 int lprocfs_dt_rd_filestotal(char *page, char **start, off_t off,
1018 int count, int *eof, void *data)
1020 struct dt_device *dt = data;
1021 struct obd_statfs osfs;
1023 int rc = dt_statfs(NULL, dt, &osfs);
1026 rc = snprintf(page, count, "%llu\n", osfs.os_files);
1031 EXPORT_SYMBOL(lprocfs_dt_rd_filestotal);
1033 int lprocfs_dt_rd_filesfree(char *page, char **start, off_t off,
1034 int count, int *eof, void *data)
1036 struct dt_device *dt = data;
1037 struct obd_statfs osfs;
1039 int rc = dt_statfs(NULL, dt, &osfs);
1042 rc = snprintf(page, count, "%llu\n", osfs.os_ffree);
1047 EXPORT_SYMBOL(lprocfs_dt_rd_filesfree);
1049 #endif /* CONFIG_PROC_FS */