X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fobdclass%2Fdt_object.c;h=07f2c7c992755cca169622c4866472f618c1bd32;hb=8b0b0892da03dc5de5cd4025b9d31c9217b1e6f1;hp=c23181454d9cfcb6acf88d98591db3955707da02;hpb=bd12686ac514c0379eaf2834544b7562739f11f2;p=fs%2Flustre-release.git diff --git a/lustre/obdclass/dt_object.c b/lustre/obdclass/dt_object.c index c231814..07f2c7c 100644 --- a/lustre/obdclass/dt_object.c +++ b/lustre/obdclass/dt_object.c @@ -27,7 +27,7 @@ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * - * Copyright (c) 2011, 2012, Whamcloud, Inc. + * Copyright (c) 2011, 2014, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -49,24 +49,13 @@ /* fid_be_to_cpu() */ #include -#include - -struct dt_find_hint { - struct lu_fid *dfh_fid; - struct dt_device *dfh_dt; - struct dt_object *dfh_o; -}; - -struct dt_thread_info { - char dti_buf[DT_MAX_PATH]; - struct dt_find_hint dti_dfh; -}; +#include /* context key constructor/destructor: dt_global_key_init, dt_global_key_fini */ LU_KEY_INIT(dt_global, struct dt_thread_info); LU_KEY_FINI(dt_global, struct dt_thread_info); -static struct lu_context_key dt_key = { +struct lu_context_key dt_key = { .lct_tags = LCT_MD_THREAD | LCT_DT_THREAD | LCT_MG_THREAD | LCT_LOCAL, .lct_init = dt_global_key_init, .lct_fini = dt_global_key_fini @@ -77,78 +66,98 @@ static struct lu_context_key dt_key = { */ void dt_txn_callback_add(struct dt_device *dev, struct dt_txn_callback *cb) { - cfs_list_add(&cb->dtc_linkage, &dev->dd_txn_callbacks); + list_add(&cb->dtc_linkage, &dev->dd_txn_callbacks); } EXPORT_SYMBOL(dt_txn_callback_add); void dt_txn_callback_del(struct dt_device *dev, struct dt_txn_callback *cb) { - cfs_list_del_init(&cb->dtc_linkage); + list_del_init(&cb->dtc_linkage); } EXPORT_SYMBOL(dt_txn_callback_del); int dt_txn_hook_start(const struct lu_env *env, struct dt_device *dev, struct thandle *th) { - int rc = 0; - struct dt_txn_callback *cb; - - if (th->th_local) - return 0; - - cfs_list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) { - if (cb->dtc_txn_start == NULL || - !(cb->dtc_tag & env->le_ctx.lc_tags)) - continue; - rc = cb->dtc_txn_start(env, th, cb->dtc_cookie); - if (rc < 0) - break; - } - return rc; + int rc = 0; + struct dt_txn_callback *cb; + + if (th->th_local) + return 0; + + list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) { + struct thandle *dtc_th = th; + + if (cb->dtc_txn_start == NULL || + !(cb->dtc_tag & env->le_ctx.lc_tags)) + continue; + + /* Usually dt_txn_hook_start is called from bottom device, + * and if the thandle has th_top, then we need use top + * thandle for the callback in the top thandle layer */ + if (th->th_top != NULL) + dtc_th = th->th_top; + + rc = cb->dtc_txn_start(env, dtc_th, cb->dtc_cookie); + if (rc < 0) + break; + } + return rc; } EXPORT_SYMBOL(dt_txn_hook_start); -int dt_txn_hook_stop(const struct lu_env *env, struct thandle *txn) +int dt_txn_hook_stop(const struct lu_env *env, struct thandle *th) { - struct dt_device *dev = txn->th_dev; - struct dt_txn_callback *cb; - int rc = 0; - - if (txn->th_local) - return 0; - - cfs_list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) { - if (cb->dtc_txn_stop == NULL || - !(cb->dtc_tag & env->le_ctx.lc_tags)) - continue; - rc = cb->dtc_txn_stop(env, txn, cb->dtc_cookie); - if (rc < 0) - break; - } - return rc; + struct dt_device *dev = th->th_dev; + struct dt_txn_callback *cb; + int rc = 0; + + if (th->th_local) + return 0; + + list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) { + struct thandle *dtc_th = th; + + if (cb->dtc_txn_stop == NULL || + !(cb->dtc_tag & env->le_ctx.lc_tags)) + continue; + + /* Usually dt_txn_hook_stop is called from bottom device, + * and if the thandle has th_top, then we need use top + * thandle for the callback in the top thandle layer */ + if (th->th_top != NULL) + dtc_th = th->th_top; + + rc = cb->dtc_txn_stop(env, dtc_th, cb->dtc_cookie); + if (rc < 0) + break; + } + return rc; } EXPORT_SYMBOL(dt_txn_hook_stop); -void dt_txn_hook_commit(struct thandle *txn) +void dt_txn_hook_commit(struct thandle *th) { - struct dt_txn_callback *cb; - - if (txn->th_local) - return; - - cfs_list_for_each_entry(cb, &txn->th_dev->dd_txn_callbacks, - dtc_linkage) { - if (cb->dtc_txn_commit) - cb->dtc_txn_commit(txn, cb->dtc_cookie); - } + struct dt_txn_callback *cb; + + if (th->th_local) + return; + + list_for_each_entry(cb, &th->th_dev->dd_txn_callbacks, + dtc_linkage) { + /* Right now, the bottom device (OSD) will use this hook + * commit to notify OSP, so we do not check and replace + * the thandle to top thandle now */ + if (cb->dtc_txn_commit) + cb->dtc_txn_commit(th, cb->dtc_cookie); + } } EXPORT_SYMBOL(dt_txn_hook_commit); int dt_device_init(struct dt_device *dev, struct lu_device_type *t) { - - CFS_INIT_LIST_HEAD(&dev->dd_txn_callbacks); - return lu_device_init(&dev->dd_lu_dev, t); + INIT_LIST_HEAD(&dev->dd_txn_callbacks); + return lu_device_init(&dev->dd_lu_dev, t); } EXPORT_SYMBOL(dt_device_init); @@ -215,35 +224,41 @@ EXPORT_SYMBOL(dt_mode_to_dft); int dt_lookup_dir(const struct lu_env *env, struct dt_object *dir, const char *name, struct lu_fid *fid) { - if (dt_try_as_dir(env, dir)) - return dt_lookup(env, dir, (struct dt_rec *)fid, - (const struct dt_key *)name, BYPASS_CAPA); - return -ENOTDIR; + if (dt_try_as_dir(env, dir)) + return dt_lookup(env, dir, (struct dt_rec *)fid, + (const struct dt_key *)name); + return -ENOTDIR; } EXPORT_SYMBOL(dt_lookup_dir); -/** - * get object for given \a fid. - */ -struct dt_object *dt_locate(const struct lu_env *env, - struct dt_device *dev, - const struct lu_fid *fid) + +/* this differs from dt_locate by top_dev as parameter + * but not one from lu_site */ +struct dt_object *dt_locate_at(const struct lu_env *env, + struct dt_device *dev, + const struct lu_fid *fid, + struct lu_device *top_dev, + const struct lu_object_conf *conf) { - struct lu_object *obj; - struct dt_object *dt; + struct lu_object *lo; + struct lu_object *n; + + lo = lu_object_find_at(env, top_dev, fid, conf); + if (IS_ERR(lo)) + return ERR_PTR(PTR_ERR(lo)); + + LASSERT(lo != NULL); - obj = lu_object_find(env, &dev->dd_lu_dev, fid, NULL); - if (!IS_ERR(obj)) { - obj = lu_object_locate(obj->lo_header, dev->dd_lu_dev.ld_type); - LASSERT(obj != NULL); - dt = container_of(obj, struct dt_object, do_lu); - } else - dt = (struct dt_object *)obj; - return dt; + list_for_each_entry(n, &lo->lo_header->loh_layers, lo_linkage) { + if (n->lo_dev == &dev->dd_lu_dev) + return container_of0(n, struct dt_object, do_lu); + } + + return ERR_PTR(-ENOENT); } -EXPORT_SYMBOL(dt_locate); +EXPORT_SYMBOL(dt_locate_at); /** - * find a object named \a entry in given \a dfh->dfh_o directory. + * find an object named \a entry in given \a dfh->dfh_o directory. */ static int dt_find_entry(const struct lu_env *env, const char *entry, void *data) { @@ -293,30 +308,28 @@ int dt_path_parser(const struct lu_env *env, return rc; } -static struct dt_object *dt_store_resolve(const struct lu_env *env, - struct dt_device *dt, - const char *path, - struct lu_fid *fid) +struct dt_object * +dt_store_resolve(const struct lu_env *env, struct dt_device *dt, + const char *path, struct lu_fid *fid) { - struct dt_thread_info *info = lu_context_key_get(&env->le_ctx, - &dt_key); - struct dt_find_hint *dfh = &info->dti_dfh; - struct dt_object *obj; - char *local = info->dti_buf; - int result; + struct dt_thread_info *info = dt_info(env); + struct dt_find_hint *dfh = &info->dti_dfh; + struct dt_object *obj; + int result; + dfh->dfh_dt = dt; dfh->dfh_fid = fid; - strncpy(local, path, DT_MAX_PATH); - local[DT_MAX_PATH - 1] = '\0'; + strlcpy(info->dti_buf, path, sizeof(info->dti_buf)); result = dt->dd_ops->dt_root_get(env, dt, fid); if (result == 0) { obj = dt_locate(env, dt, fid); if (!IS_ERR(obj)) { dfh->dfh_o = obj; - result = dt_path_parser(env, local, dt_find_entry, dfh); + result = dt_path_parser(env, info->dti_buf, + dt_find_entry, dfh); if (result != 0) obj = ERR_PTR(result); else @@ -371,7 +384,6 @@ struct dt_object *dt_store_open(const struct lu_env *env, } return file; } -EXPORT_SYMBOL(dt_store_open); struct dt_object *dt_find_or_create(const struct lu_env *env, struct dt_device *dt, @@ -457,8 +469,8 @@ void dt_global_fini(void) int dt_read(const struct lu_env *env, struct dt_object *dt, struct lu_buf *buf, loff_t *pos) { - LASSERTF(dt != NULL, "dt is NULL when we want to read record\n"); - return dt->do_body_ops->dbo_read(env, dt, buf, pos, BYPASS_CAPA); + LASSERTF(dt != NULL, "dt is NULL when we want to read record\n"); + return dt->do_body_ops->dbo_read(env, dt, buf, pos); } EXPORT_SYMBOL(dt_read); @@ -478,35 +490,31 @@ EXPORT_SYMBOL(dt_read); int dt_record_read(const struct lu_env *env, struct dt_object *dt, struct lu_buf *buf, loff_t *pos) { - int rc; + ssize_t size; - LASSERTF(dt != NULL, "dt is NULL when we want to read record\n"); + LASSERTF(dt != NULL, "dt is NULL when we want to read record\n"); - rc = dt->do_body_ops->dbo_read(env, dt, buf, pos, BYPASS_CAPA); - - if (rc == buf->lb_len) - rc = 0; - else if (rc >= 0) - rc = -EFAULT; - return rc; + size = dt->do_body_ops->dbo_read(env, dt, buf, pos); + if (size < 0) + return size; + return (size == (ssize_t)buf->lb_len) ? 0 : -EFAULT; } EXPORT_SYMBOL(dt_record_read); int dt_record_write(const struct lu_env *env, struct dt_object *dt, const struct lu_buf *buf, loff_t *pos, struct thandle *th) { - int rc; + ssize_t size; - LASSERTF(dt != NULL, "dt is NULL when we want to write record\n"); - LASSERT(th != NULL); - LASSERT(dt->do_body_ops); - LASSERT(dt->do_body_ops->dbo_write); - rc = dt->do_body_ops->dbo_write(env, dt, buf, pos, th, BYPASS_CAPA, 1); - if (rc == buf->lb_len) - rc = 0; - else if (rc >= 0) - rc = -EFAULT; - return rc; + LASSERTF(dt != NULL, "dt is NULL when we want to write record\n"); + LASSERT(th != NULL); + LASSERT(dt->do_body_ops); + LASSERT(dt->do_body_ops->dbo_write); + + size = dt->do_body_ops->dbo_write(env, dt, buf, pos, th, 1); + if (size < 0) + return size; + return (size == (ssize_t)buf->lb_len) ? 0 : -EFAULT; } EXPORT_SYMBOL(dt_record_write); @@ -535,7 +543,7 @@ void dt_version_set(const struct lu_env *env, struct dt_object *o, vbuf.lb_buf = &version; vbuf.lb_len = sizeof(version); - rc = dt_xattr_set(env, o, &vbuf, xname, 0, th, BYPASS_CAPA); + rc = dt_xattr_set(env, o, &vbuf, xname, 0, th); if (rc < 0) CDEBUG(D_INODE, "Can't set version, rc %d\n", rc); return; @@ -552,7 +560,7 @@ dt_obj_version_t dt_version_get(const struct lu_env *env, struct dt_object *o) LASSERT(o); vbuf.lb_buf = &version; vbuf.lb_len = sizeof(version); - rc = dt_xattr_get(env, o, &vbuf, xname, BYPASS_CAPA); + rc = dt_xattr_get(env, o, &vbuf, xname); if (rc != sizeof(version)) { CDEBUG(D_INODE, "Can't get version, rc %d\n", rc); version = 0; @@ -571,6 +579,28 @@ EXPORT_SYMBOL(dt_directory_features); const struct dt_index_features dt_otable_features; EXPORT_SYMBOL(dt_otable_features); +/* lfsck orphan */ +const struct dt_index_features dt_lfsck_orphan_features = { + .dif_flags = 0, + .dif_keysize_min = sizeof(struct lu_fid), + .dif_keysize_max = sizeof(struct lu_fid), + .dif_recsize_min = sizeof(struct lu_orphan_rec), + .dif_recsize_max = sizeof(struct lu_orphan_rec), + .dif_ptrsize = 4 +}; +EXPORT_SYMBOL(dt_lfsck_orphan_features); + +/* lfsck */ +const struct dt_index_features dt_lfsck_features = { + .dif_flags = DT_IND_UPDATE, + .dif_keysize_min = sizeof(struct lu_fid), + .dif_keysize_max = sizeof(struct lu_fid), + .dif_recsize_min = sizeof(__u8), + .dif_recsize_max = sizeof(__u8), + .dif_ptrsize = 4 +}; +EXPORT_SYMBOL(dt_lfsck_features); + /* accounting indexes */ const struct dt_index_features dt_acct_features = { .dif_flags = DT_IND_UPDATE, @@ -605,3 +635,435 @@ const struct dt_index_features dt_quota_slv_features = { .dif_ptrsize = 4 }; EXPORT_SYMBOL(dt_quota_slv_features); + +/* helper function returning what dt_index_features structure should be used + * based on the FID sequence. This is used by OBD_IDX_READ RPC */ +static inline const struct dt_index_features *dt_index_feat_select(__u64 seq, + __u32 mode) +{ + if (seq == FID_SEQ_QUOTA_GLB) { + /* global quota index */ + if (!S_ISREG(mode)) + /* global quota index should be a regular file */ + return ERR_PTR(-ENOENT); + return &dt_quota_glb_features; + } else if (seq == FID_SEQ_QUOTA) { + /* quota slave index */ + if (!S_ISREG(mode)) + /* slave index should be a regular file */ + return ERR_PTR(-ENOENT); + return &dt_quota_slv_features; + } else if (seq == FID_SEQ_LAYOUT_RBTREE){ + return &dt_lfsck_orphan_features; + } else if (seq >= FID_SEQ_NORMAL) { + /* object is part of the namespace, verify that it is a + * directory */ + if (!S_ISDIR(mode)) + /* sorry, we can only deal with directory */ + return ERR_PTR(-ENOTDIR); + return &dt_directory_features; + } + + return ERR_PTR(-EOPNOTSUPP); +} + +/* + * Fill a lu_idxpage with key/record pairs read for transfer via OBD_IDX_READ + * RPC + * + * \param env - is the environment passed by the caller + * \param lp - is a pointer to the lu_page to fill + * \param nob - is the maximum number of bytes that should be copied + * \param iops - is the index operation vector associated with the index object + * \param it - is a pointer to the current iterator + * \param attr - is the index attribute to pass to iops->rec() + * \param arg - is a pointer to the idx_info structure + */ +static int dt_index_page_build(const struct lu_env *env, union lu_page *lp, + size_t nob, const struct dt_it_ops *iops, + struct dt_it *it, __u32 attr, void *arg) +{ + struct idx_info *ii = (struct idx_info *)arg; + struct lu_idxpage *lip = &lp->lp_idx; + char *entry; + size_t size; + int rc; + ENTRY; + + if (nob < LIP_HDR_SIZE) + return -EINVAL; + + /* initialize the header of the new container */ + memset(lip, 0, LIP_HDR_SIZE); + lip->lip_magic = LIP_MAGIC; + nob -= LIP_HDR_SIZE; + + /* compute size needed to store a key/record pair */ + size = ii->ii_recsize + ii->ii_keysize; + if ((ii->ii_flags & II_FL_NOHASH) == 0) + /* add hash if the client wants it */ + size += sizeof(__u64); + + entry = lip->lip_entries; + do { + char *tmp_entry = entry; + struct dt_key *key; + __u64 hash; + __u16 keysize; + __u16 recsize; + + /* fetch 64-bit hash value */ + hash = iops->store(env, it); + ii->ii_hash_end = hash; + + if (OBD_FAIL_CHECK(OBD_FAIL_OBD_IDX_READ_BREAK)) { + if (lip->lip_nr != 0) + GOTO(out, rc = 0); + } + + if (nob < size) { + if (lip->lip_nr == 0) + GOTO(out, rc = -EINVAL); + GOTO(out, rc = 0); + } + + if (!(ii->ii_flags & II_FL_NOHASH)) { + /* client wants to the 64-bit hash value associated with + * each record */ + memcpy(tmp_entry, &hash, sizeof(hash)); + tmp_entry += sizeof(hash); + } + + if (ii->ii_flags & II_FL_VARKEY) + keysize = iops->key_size(env, it); + else + keysize = ii->ii_keysize; + + if (!(ii->ii_flags & II_FL_NOKEY)) { + /* then the key value */ + key = iops->key(env, it); + memcpy(tmp_entry, key, keysize); + tmp_entry += keysize; + } + + /* and finally the record */ + rc = iops->rec(env, it, (struct dt_rec *)tmp_entry, attr); + if (rc != -ESTALE) { + if (rc != 0) + GOTO(out, rc); + + /* hash/key/record successfully copied! */ + lip->lip_nr++; + if (unlikely(lip->lip_nr == 1 && ii->ii_count == 0)) + ii->ii_hash_start = hash; + + if (ii->ii_flags & II_FL_VARREC) + recsize = iops->rec_size(env, it, attr); + else + recsize = ii->ii_recsize; + + entry = tmp_entry + recsize; + nob -= size; + } + + /* move on to the next record */ + do { + rc = iops->next(env, it); + } while (rc == -ESTALE); + + } while (rc == 0); + + GOTO(out, rc); +out: + if (rc >= 0 && lip->lip_nr > 0) + /* one more container */ + ii->ii_count++; + if (rc > 0) + /* no more entries */ + ii->ii_hash_end = II_END_OFF; + return rc; +} + + +/* + * Walk index and fill lu_page containers with key/record pairs + * + * \param env - is the environment passed by the caller + * \param obj - is the index object to parse + * \param rdpg - is the lu_rdpg descriptor associated with the transfer + * \param filler - is the callback function responsible for filling a lu_page + * with key/record pairs in the format wanted by the caller + * \param arg - is an opaq argument passed to the filler function + * + * \retval sum (in bytes) of all filled lu_pages + * \retval -ve errno on failure + */ +int dt_index_walk(const struct lu_env *env, struct dt_object *obj, + const struct lu_rdpg *rdpg, dt_index_page_build_t filler, + void *arg) +{ + struct dt_it *it; + const struct dt_it_ops *iops; + size_t pageidx, nob, nlupgs = 0; + int rc; + ENTRY; + + LASSERT(rdpg->rp_pages != NULL); + LASSERT(obj->do_index_ops != NULL); + + nob = rdpg->rp_count; + if (nob == 0) + RETURN(-EFAULT); + + /* Iterate through index and fill containers from @rdpg */ + iops = &obj->do_index_ops->dio_it; + LASSERT(iops != NULL); + it = iops->init(env, obj, rdpg->rp_attrs); + if (IS_ERR(it)) + RETURN(PTR_ERR(it)); + + rc = iops->load(env, it, rdpg->rp_hash); + if (rc == 0) { + /* + * Iterator didn't find record with exactly the key requested. + * + * It is currently either + * + * - positioned above record with key less than + * requested---skip it. + * - or not positioned at all (is in IAM_IT_SKEWED + * state)---position it on the next item. + */ + rc = iops->next(env, it); + } else if (rc > 0) { + rc = 0; + } else { + if (rc == -ENODATA) + rc = 0; + GOTO(out, rc); + } + + /* Fill containers one after the other. There might be multiple + * containers per physical page. + * + * At this point and across for-loop: + * rc == 0 -> ok, proceed. + * rc > 0 -> end of index. + * rc < 0 -> error. */ + for (pageidx = 0; rc == 0 && nob > 0; pageidx++) { + union lu_page *lp; + int i; + + LASSERT(pageidx < rdpg->rp_npages); + lp = kmap(rdpg->rp_pages[pageidx]); + + /* fill lu pages */ + for (i = 0; i < LU_PAGE_COUNT; i++, lp++, nob -= LU_PAGE_SIZE) { + rc = filler(env, lp, min_t(size_t, nob, LU_PAGE_SIZE), + iops, it, rdpg->rp_attrs, arg); + if (rc < 0) + break; + /* one more lu_page */ + nlupgs++; + if (rc > 0) + /* end of index */ + break; + } + kunmap(rdpg->rp_pages[i]); + } + +out: + iops->put(env, it); + iops->fini(env, it); + + if (rc >= 0) + rc = min_t(size_t, nlupgs * LU_PAGE_SIZE, rdpg->rp_count); + + RETURN(rc); +} +EXPORT_SYMBOL(dt_index_walk); + +/** + * Walk key/record pairs of an index and copy them into 4KB containers to be + * transferred over the network. This is the common handler for OBD_IDX_READ + * RPC processing. + * + * \param env - is the environment passed by the caller + * \param dev - is the dt_device storing the index + * \param ii - is the idx_info structure packed by the client in the + * OBD_IDX_READ request + * \param rdpg - is the lu_rdpg descriptor + * + * \retval on success, return sum (in bytes) of all filled containers + * \retval appropriate error otherwise. + */ +int dt_index_read(const struct lu_env *env, struct dt_device *dev, + struct idx_info *ii, const struct lu_rdpg *rdpg) +{ + const struct dt_index_features *feat; + struct dt_object *obj; + int rc; + ENTRY; + + /* rp_count shouldn't be null and should be a multiple of the container + * size */ + if (rdpg->rp_count == 0 || (rdpg->rp_count & (LU_PAGE_SIZE - 1)) != 0) + RETURN(-EFAULT); + + if (!fid_is_quota(&ii->ii_fid) && !fid_is_layout_rbtree(&ii->ii_fid) && + !fid_is_norm(&ii->ii_fid)) + RETURN(-EOPNOTSUPP); + + /* lookup index object subject to the transfer */ + obj = dt_locate(env, dev, &ii->ii_fid); + if (IS_ERR(obj)) + RETURN(PTR_ERR(obj)); + if (dt_object_exists(obj) == 0) + GOTO(out, rc = -ENOENT); + + /* fetch index features associated with index object */ + feat = dt_index_feat_select(fid_seq(&ii->ii_fid), + lu_object_attr(&obj->do_lu)); + if (IS_ERR(feat)) + GOTO(out, rc = PTR_ERR(feat)); + + /* load index feature if not done already */ + if (obj->do_index_ops == NULL) { + rc = obj->do_ops->do_index_try(env, obj, feat); + if (rc) + GOTO(out, rc); + } + + /* fill ii_flags with supported index features */ + ii->ii_flags &= (II_FL_NOHASH | II_FL_NOKEY | II_FL_VARKEY | + II_FL_VARREC); + + if (!(feat->dif_flags & DT_IND_VARKEY)) + ii->ii_keysize = feat->dif_keysize_max; + + if (!(feat->dif_flags & DT_IND_VARREC)) + ii->ii_recsize = feat->dif_recsize_max; + + if (feat->dif_flags & DT_IND_NONUNQ) + /* key isn't necessarily unique */ + ii->ii_flags |= II_FL_NONUNQ; + + if (!fid_is_layout_rbtree(&ii->ii_fid)) { + dt_read_lock(env, obj, 0); + /* fetch object version before walking the index */ + ii->ii_version = dt_version_get(env, obj); + } + + /* walk the index and fill lu_idxpages with key/record pairs */ + rc = dt_index_walk(env, obj, rdpg, dt_index_page_build, ii); + if (!fid_is_layout_rbtree(&ii->ii_fid)) + dt_read_unlock(env, obj); + + if (rc == 0) { + /* index is empty */ + LASSERT(ii->ii_count == 0); + ii->ii_hash_end = II_END_OFF; + } + + GOTO(out, rc); +out: + lu_object_put(env, &obj->do_lu); + return rc; +} +EXPORT_SYMBOL(dt_index_read); + +#ifdef CONFIG_PROC_FS +int lprocfs_dt_blksize_seq_show(struct seq_file *m, void *v) +{ + struct dt_device *dt = m->private; + struct obd_statfs osfs; + + int rc = dt_statfs(NULL, dt, &osfs); + if (rc == 0) + seq_printf(m, "%u\n", (unsigned) osfs.os_bsize); + return rc; +} +EXPORT_SYMBOL(lprocfs_dt_blksize_seq_show); + +int lprocfs_dt_kbytestotal_seq_show(struct seq_file *m, void *v) +{ + struct dt_device *dt = m->private; + struct obd_statfs osfs; + + int rc = dt_statfs(NULL, dt, &osfs); + if (rc == 0) { + __u32 blk_size = osfs.os_bsize >> 10; + __u64 result = osfs.os_blocks; + + while (blk_size >>= 1) + result <<= 1; + + seq_printf(m, LPU64"\n", result); + } + return rc; +} +EXPORT_SYMBOL(lprocfs_dt_kbytestotal_seq_show); + +int lprocfs_dt_kbytesfree_seq_show(struct seq_file *m, void *v) +{ + struct dt_device *dt = m->private; + struct obd_statfs osfs; + + int rc = dt_statfs(NULL, dt, &osfs); + if (rc == 0) { + __u32 blk_size = osfs.os_bsize >> 10; + __u64 result = osfs.os_bfree; + + while (blk_size >>= 1) + result <<= 1; + + seq_printf(m, LPU64"\n", result); + } + return rc; +} +EXPORT_SYMBOL(lprocfs_dt_kbytesfree_seq_show); + +int lprocfs_dt_kbytesavail_seq_show(struct seq_file *m, void *v) +{ + struct dt_device *dt = m->private; + struct obd_statfs osfs; + + int rc = dt_statfs(NULL, dt, &osfs); + if (rc == 0) { + __u32 blk_size = osfs.os_bsize >> 10; + __u64 result = osfs.os_bavail; + + while (blk_size >>= 1) + result <<= 1; + + seq_printf(m, LPU64"\n", result); + } + return rc; +} +EXPORT_SYMBOL(lprocfs_dt_kbytesavail_seq_show); + +int lprocfs_dt_filestotal_seq_show(struct seq_file *m, void *v) +{ + struct dt_device *dt = m->private; + struct obd_statfs osfs; + + int rc = dt_statfs(NULL, dt, &osfs); + if (rc == 0) + seq_printf(m, LPU64"\n", osfs.os_files); + return rc; +} +EXPORT_SYMBOL(lprocfs_dt_filestotal_seq_show); + +int lprocfs_dt_filesfree_seq_show(struct seq_file *m, void *v) +{ + struct dt_device *dt = m->private; + struct obd_statfs osfs; + + int rc = dt_statfs(NULL, dt, &osfs); + if (rc == 0) + seq_printf(m, LPU64"\n", osfs.os_ffree); + return rc; +} +EXPORT_SYMBOL(lprocfs_dt_filesfree_seq_show); + +#endif /* CONFIG_PROC_FS */