X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fobdclass%2Fdt_object.c;h=c23181454d9cfcb6acf88d98591db3955707da02;hb=44cc42f556c668de09479f706beea4b6e600eb4b;hp=3d08d2fb17f9ba08ae5cafe2c337d4dcaa81019d;hpb=2a50b6bf048517aa1f63c4e29c3637f09c148fdb;p=fs%2Flustre-release.git diff --git a/lustre/obdclass/dt_object.c b/lustre/obdclass/dt_object.c index 3d08d2f..c231814 100644 --- a/lustre/obdclass/dt_object.c +++ b/lustre/obdclass/dt_object.c @@ -1,6 +1,4 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: - * +/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. @@ -28,6 +26,8 @@ /* * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. + * + * Copyright (c) 2011, 2012, Whamcloud, Inc. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -42,9 +42,6 @@ */ #define DEBUG_SUBSYSTEM S_CLASS -#ifndef EXPORT_SYMTAB -# define EXPORT_SYMTAB -#endif #include #include @@ -52,6 +49,8 @@ /* fid_be_to_cpu() */ #include +#include + struct dt_find_hint { struct lu_fid *dfh_fid; struct dt_device *dfh_dt; @@ -68,7 +67,7 @@ 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 = { - .lct_tags = LCT_MD_THREAD|LCT_DT_THREAD, + .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 }; @@ -89,21 +88,23 @@ void dt_txn_callback_del(struct dt_device *dev, struct dt_txn_callback *cb) EXPORT_SYMBOL(dt_txn_callback_del); int dt_txn_hook_start(const struct lu_env *env, - struct dt_device *dev, struct txn_param *param) + struct dt_device *dev, struct thandle *th) { - int result; + int rc = 0; struct dt_txn_callback *cb; - result = 0; + 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; - result = cb->dtc_txn_start(env, param, cb->dtc_cookie); - if (result < 0) + rc = cb->dtc_txn_start(env, th, cb->dtc_cookie); + if (rc < 0) break; } - return result; + return rc; } EXPORT_SYMBOL(dt_txn_hook_start); @@ -111,18 +112,20 @@ int dt_txn_hook_stop(const struct lu_env *env, struct thandle *txn) { struct dt_device *dev = txn->th_dev; struct dt_txn_callback *cb; - int result; + int rc = 0; + + if (txn->th_local) + return 0; - result = 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; - result = cb->dtc_txn_stop(env, txn, cb->dtc_cookie); - if (result < 0) + rc = cb->dtc_txn_stop(env, txn, cb->dtc_cookie); + if (rc < 0) break; } - return result; + return rc; } EXPORT_SYMBOL(dt_txn_hook_stop); @@ -130,6 +133,9 @@ void dt_txn_hook_commit(struct thandle *txn) { 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) @@ -200,31 +206,21 @@ enum dt_format_type dt_mode_to_dft(__u32 mode) } return result; } - EXPORT_SYMBOL(dt_mode_to_dft); + /** * lookup fid for object named \a name in directory \a dir. */ -static int dt_lookup(const struct lu_env *env, struct dt_object *dir, - const char *name, struct lu_fid *fid) +int dt_lookup_dir(const struct lu_env *env, struct dt_object *dir, + const char *name, struct lu_fid *fid) { - struct dt_rec *rec = (struct dt_rec *)fid; - const struct dt_key *key = (const struct dt_key *)name; - int result; - - if (dt_try_as_dir(env, dir)) { - result = dir->do_index_ops->dio_lookup(env, dir, rec, key, - BYPASS_CAPA); - if (result > 0) - result = 0; - else if (result == 0) - result = -ENOENT; - } else - result = -ENOTDIR; - return result; + 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; } - +EXPORT_SYMBOL(dt_lookup_dir); /** * get object for given \a fid. */ @@ -257,7 +253,7 @@ static int dt_find_entry(const struct lu_env *env, const char *entry, void *data struct dt_object *obj = dfh->dfh_o; int result; - result = dt_lookup(env, obj, entry, fid); + result = dt_lookup_dir(env, obj, entry, fid); lu_object_put(env, &obj->do_lu); if (result == 0) { obj = dt_locate(env, dt, fid); @@ -341,7 +337,7 @@ static struct dt_object *dt_reg_open(const struct lu_env *env, struct dt_object *o; int result; - result = dt_lookup(env, p, name, fid); + result = dt_lookup_dir(env, p, name, fid); if (result == 0){ o = dt_locate(env, dt, fid); } @@ -377,6 +373,61 @@ struct dt_object *dt_store_open(const struct lu_env *env, } EXPORT_SYMBOL(dt_store_open); +struct dt_object *dt_find_or_create(const struct lu_env *env, + struct dt_device *dt, + const struct lu_fid *fid, + struct dt_object_format *dof, + struct lu_attr *at) +{ + struct dt_object *dto; + struct thandle *th; + int rc; + + ENTRY; + + dto = dt_locate(env, dt, fid); + if (IS_ERR(dto)) + RETURN(dto); + + LASSERT(dto != NULL); + if (dt_object_exists(dto)) + RETURN(dto); + + th = dt_trans_create(env, dt); + if (IS_ERR(th)) + GOTO(out, rc = PTR_ERR(th)); + + rc = dt_declare_create(env, dto, at, NULL, dof, th); + if (rc) + GOTO(trans_stop, rc); + + rc = dt_trans_start_local(env, dt, th); + if (rc) + GOTO(trans_stop, rc); + + dt_write_lock(env, dto, 0); + if (dt_object_exists(dto)) + GOTO(unlock, rc = 0); + + CDEBUG(D_OTHER, "create new object "DFID"\n", PFID(fid)); + + rc = dt_create(env, dto, at, NULL, dof, th); + if (rc) + GOTO(unlock, rc); + LASSERT(dt_object_exists(dto)); +unlock: + dt_write_unlock(env, dto); +trans_stop: + dt_trans_stop(env, dt, th); +out: + if (rc) { + lu_object_put(env, &dto->do_lu); + RETURN(ERR_PTR(rc)); + } + RETURN(dto); +} +EXPORT_SYMBOL(dt_find_or_create); + /* dt class init function. */ int dt_global_init(void) { @@ -392,6 +443,38 @@ void dt_global_fini(void) lu_context_key_degister(&dt_key); } +/** + * Generic read helper. May return an error for partial reads. + * + * \param env lustre environment + * \param dt object to be read + * \param buf lu_buf to be filled, with buffer pointer and length + * \param pos position to start reading, updated as data is read + * + * \retval real size of data read + * \retval -ve errno on failure + */ +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); +} +EXPORT_SYMBOL(dt_read); + +/** + * Read structures of fixed size from storage. Unlike dt_read(), using + * dt_record_read() will return an error for partial reads. + * + * \param env lustre environment + * \param dt object to be read + * \param buf lu_buf to be filled, with buffer pointer and length + * \param pos position to start reading, updated as data is read + * + * \retval 0 on successfully reading full buffer + * \retval -EFAULT on short read + * \retval -ve errno on failure + */ int dt_record_read(const struct lu_env *env, struct dt_object *dt, struct lu_buf *buf, loff_t *pos) { @@ -416,6 +499,8 @@ int dt_record_write(const struct lu_env *env, struct dt_object *dt, 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; @@ -425,5 +510,98 @@ int dt_record_write(const struct lu_env *env, struct dt_object *dt, } EXPORT_SYMBOL(dt_record_write); +int dt_declare_version_set(const struct lu_env *env, struct dt_object *o, + struct thandle *th) +{ + struct lu_buf vbuf; + char *xname = XATTR_NAME_VERSION; + + LASSERT(o); + vbuf.lb_buf = NULL; + vbuf.lb_len = sizeof(dt_obj_version_t); + return dt_declare_xattr_set(env, o, &vbuf, xname, 0, th); + +} +EXPORT_SYMBOL(dt_declare_version_set); + +void dt_version_set(const struct lu_env *env, struct dt_object *o, + dt_obj_version_t version, struct thandle *th) +{ + struct lu_buf vbuf; + char *xname = XATTR_NAME_VERSION; + int rc; + + LASSERT(o); + vbuf.lb_buf = &version; + vbuf.lb_len = sizeof(version); + + rc = dt_xattr_set(env, o, &vbuf, xname, 0, th, BYPASS_CAPA); + if (rc < 0) + CDEBUG(D_INODE, "Can't set version, rc %d\n", rc); + return; +} +EXPORT_SYMBOL(dt_version_set); + +dt_obj_version_t dt_version_get(const struct lu_env *env, struct dt_object *o) +{ + struct lu_buf vbuf; + char *xname = XATTR_NAME_VERSION; + dt_obj_version_t version; + int rc; + + LASSERT(o); + vbuf.lb_buf = &version; + vbuf.lb_len = sizeof(version); + rc = dt_xattr_get(env, o, &vbuf, xname, BYPASS_CAPA); + if (rc != sizeof(version)) { + CDEBUG(D_INODE, "Can't get version, rc %d\n", rc); + version = 0; + } + return version; +} +EXPORT_SYMBOL(dt_version_get); + +/* list of all supported index types */ + +/* directories */ const struct dt_index_features dt_directory_features; EXPORT_SYMBOL(dt_directory_features); + +/* scrub iterator */ +const struct dt_index_features dt_otable_features; +EXPORT_SYMBOL(dt_otable_features); + +/* accounting indexes */ +const struct dt_index_features dt_acct_features = { + .dif_flags = DT_IND_UPDATE, + .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */ + .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */ + .dif_recsize_min = sizeof(struct lquota_acct_rec), /* 16 bytes */ + .dif_recsize_max = sizeof(struct lquota_acct_rec), /* 16 bytes */ + .dif_ptrsize = 4 +}; +EXPORT_SYMBOL(dt_acct_features); + +/* global quota files */ +const struct dt_index_features dt_quota_glb_features = { + .dif_flags = DT_IND_UPDATE, + /* a different key would have to be used for per-directory quota */ + .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */ + .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */ + .dif_recsize_min = sizeof(struct lquota_glb_rec), /* 32 bytes */ + .dif_recsize_max = sizeof(struct lquota_glb_rec), /* 32 bytes */ + .dif_ptrsize = 4 +}; +EXPORT_SYMBOL(dt_quota_glb_features); + +/* slave quota files */ +const struct dt_index_features dt_quota_slv_features = { + .dif_flags = DT_IND_UPDATE, + /* a different key would have to be used for per-directory quota */ + .dif_keysize_min = sizeof(__u64), /* 64-bit uid/gid */ + .dif_keysize_max = sizeof(__u64), /* 64-bit uid/gid */ + .dif_recsize_min = sizeof(struct lquota_slv_rec), /* 8 bytes */ + .dif_recsize_max = sizeof(struct lquota_slv_rec), /* 8 bytes */ + .dif_ptrsize = 4 +}; +EXPORT_SYMBOL(dt_quota_slv_features);