X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Finclude%2Fmd_object.h;h=4537c7bd9fa9e10fc2e852199c3356b70f580292;hp=432cf0d858f2b022fc98142530f3ebb43fb80cdf;hb=a067251099b6b225f2409f680d9e4423253d0730;hpb=9cac270ab1ac1504c230abf6ebbbe5aa119de2a1 diff --git a/lustre/include/md_object.h b/lustre/include/md_object.h index 432cf0d..4537c7b 100644 --- a/lustre/include/md_object.h +++ b/lustre/include/md_object.h @@ -1,31 +1,47 @@ -/* -*- 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. * - * Extention of lu_object.h for metadata objects + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. * - * Copyright (C) 2006 Cluster File Systems, Inc. + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). * - * This file is part of Lustre, http://www.lustre.org. + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf * - * Lustre is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. * - * Lustre is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * GPL HEADER END + */ +/* + * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2011, 2013, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. * - * You should have received a copy of the GNU General Public License - * along with Lustre; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * lustre/include/md_object.h * + * Extention of lu_object.h for metadata objects */ #ifndef _LUSTRE_MD_OBJECT_H #define _LUSTRE_MD_OBJECT_H -/* +/** \defgroup md md * Sub-class of lu_object with methods common for "meta-data" objects in MDT * stack. * @@ -33,63 +49,47 @@ * them, and treat them as directories. * * Examples: mdt, cmm, and mdt are implementations of md interface. + * @{ */ /* * super-class definitions. */ -#include -#include +#include struct md_device; struct md_device_operations; struct md_object; - +struct obd_export; enum { - UCRED_INVALID = -1, - UCRED_INIT = 0, - UCRED_OLD = 1, - UCRED_NEW = 2 -}; - -struct md_ucred { - __u32 mu_valid; - __u32 mu_o_uid; - __u32 mu_o_gid; - __u32 mu_o_fsuid; - __u32 mu_o_fsgid; - __u32 mu_uid; - __u32 mu_gid; - __u32 mu_fsuid; - __u32 mu_fsgid; - __u32 mu_suppgids[2]; - __u32 mu_cap; - __u32 mu_umask; - struct group_info *mu_ginfo; - struct md_identity *mu_identity; + MD_CAPAINFO_MAX = 5 }; -#define MD_CAPAINFO_MAX 5 - -/* there are at most 5 fids in one operation, see rename, NOTE the last one +/** there are at most 5 fids in one operation, see rename, NOTE the last one * is a temporary one used for is_subdir() */ struct md_capainfo { - const struct lu_fid *mc_fid[MD_CAPAINFO_MAX]; + __u32 mc_auth; + __u32 mc_padding; + struct lu_fid mc_fid[MD_CAPAINFO_MAX]; struct lustre_capa *mc_capa[MD_CAPAINFO_MAX]; }; -/* +struct md_quota { + struct obd_export *mq_exp; +}; + +/** * Implemented in mdd/mdd_handler.c. * * XXX should be moved into separate .h/.c together with all md security * related definitions. */ -struct md_ucred *md_ucred(const struct lu_env *env); struct md_capainfo *md_capainfo(const struct lu_env *env); +struct md_quota *md_quota(const struct lu_env *env); -/* metadata attributes */ +/** metadata attributes */ enum ma_valid { MA_INODE = (1 << 0), MA_LOV = (1 << 1), @@ -97,7 +97,11 @@ enum ma_valid { MA_FLAGS = (1 << 3), MA_LMV = (1 << 4), MA_ACL_DEF = (1 << 5), - MA_LOV_DEF = (1 << 6) + MA_LOV_DEF = (1 << 6), + MA_LAY_GEN = (1 << 7), + MA_HSM = (1 << 8), + MA_SOM = (1 << 9), + MA_PFID = (1 << 10) }; typedef enum { @@ -118,53 +122,84 @@ typedef enum { MDT_PDO_LOCK = (1 << 1) } mdl_type_t; +/* memory structure for hsm attributes + * for fields description see the on disk structure hsm_attrs + * which is defined in lustre_idl.h + */ +struct md_hsm { + __u32 mh_compat; + __u32 mh_flags; + __u64 mh_arch_id; + __u64 mh_arch_ver; +}; + +#define IOEPOCH_INVAL 0 + +/* memory structure for som attributes + * for fields description see the on disk structure som_attrs + * which is defined in lustre_idl.h + */ +struct md_som_data { + __u32 msd_compat; + __u32 msd_incompat; + __u64 msd_ioepoch; + __u64 msd_size; + __u64 msd_blocks; + __u64 msd_mountid; +}; + struct md_attr { __u64 ma_valid; __u64 ma_need; __u64 ma_attr_flags; struct lu_attr ma_attr; + struct lu_fid ma_pfid; + struct md_hsm ma_hsm; struct lov_mds_md *ma_lmm; - int ma_lmm_size; struct lmv_stripe_md *ma_lmv; - int ma_lmv_size; void *ma_acl; - int ma_acl_size; struct llog_cookie *ma_cookie; - int ma_cookie_size; struct lustre_capa *ma_capa; + struct md_som_data *ma_som; + int ma_lmm_size; + int ma_lmv_size; + int ma_acl_size; + int ma_cookie_size; + __u16 ma_layout_gen; }; -/* Additional parameters for create */ +/** Additional parameters for create */ struct md_op_spec { union { - /* symlink target */ + /** symlink target */ const char *sp_symname; - /* parent FID for cross-ref mkdir */ + /** parent FID for cross-ref mkdir */ const struct lu_fid *sp_pfid; - /* eadata for regular files */ + /** eadata for regular files */ struct md_spec_reg { - /* lov objs exist already */ + /** lov objs exist already */ const struct lu_fid *fid; - int no_lov_create; const void *eadata; int eadatalen; } sp_ea; } u; - - /* Create flag from client: such as MDS_OPEN_CREAT, and others. */ - __u32 sp_cr_flags; - /* Should mdd do lookup sanity check or not. */ - int sp_cr_lookup; + /** Create flag from client: such as MDS_OPEN_CREAT, and others. */ + __u64 sp_cr_flags; - /* Current lock mode for parent dir where create is performing. */ + /** don't create lov objects or llog cookie - this replay */ + unsigned int no_create:1, + sp_cr_lookup:1, /* do lookup sanity check or not. */ + sp_rm_entry:1; /* only remove name entry */ + + /** Current lock mode for parent dir where create is performing. */ mdl_mode_t sp_cr_mode; - /* Check for split */ - int sp_ck_split; + /** to create directory */ + const struct dt_index_features *sp_feat; }; -/* +/** * Operations implemented for each md object (both directory and leaf). */ struct md_object_operations { @@ -191,13 +226,21 @@ struct md_object_operations { int (*moo_xattr_del)(const struct lu_env *env, struct md_object *obj, const char *name); + /** This method is used to swap the layouts between 2 objects */ + int (*moo_swap_layouts)(const struct lu_env *env, + struct md_object *obj1, struct md_object *obj2, + __u64 flags); + + /** \retval number of bytes actually read upon success */ int (*moo_readpage)(const struct lu_env *env, struct md_object *obj, const struct lu_rdpg *rdpg); int (*moo_readlink)(const struct lu_env *env, struct md_object *obj, struct lu_buf *buf); - - /* part of cross-ref operation */ + int (*moo_changelog)(const struct lu_env *env, + enum changelog_rec_type type, int flags, + struct md_object *obj); + /** part of cross-ref operation */ int (*moo_object_create)(const struct lu_env *env, struct md_object *obj, const struct md_op_spec *spec, @@ -215,13 +258,26 @@ struct md_object_operations { struct md_object *obj, int flag); int (*moo_close)(const struct lu_env *env, struct md_object *obj, - struct md_attr *ma); - + struct md_attr *ma, int mode); + int (*moo_capa_get)(const struct lu_env *, struct md_object *, struct lustre_capa *, int renewal); + + int (*moo_object_sync)(const struct lu_env *, struct md_object *); + + int (*moo_file_lock)(const struct lu_env *env, struct md_object *obj, + struct lov_mds_md *lmm, struct ldlm_extent *extent, + struct lustre_handle *lockh); + int (*moo_file_unlock)(const struct lu_env *env, struct md_object *obj, + struct lov_mds_md *lmm, + struct lustre_handle *lockh); + int (*moo_object_lock)(const struct lu_env *env, struct md_object *obj, + struct lustre_handle *lh, + struct ldlm_enqueue_info *einfo, + void *policy); }; -/* +/** * Operations implemented for each directory object. */ struct md_dir_operations { @@ -241,7 +297,7 @@ struct md_dir_operations { struct md_op_spec *spec, struct md_attr *ma); - /* This method is used for creating data object for this meta object*/ + /** This method is used for creating data object for this meta object*/ int (*mdo_create_data)(const struct lu_env *env, struct md_object *p, struct md_object *o, const struct md_op_spec *spec, @@ -256,11 +312,18 @@ struct md_dir_operations { struct md_object *src_obj, const struct lu_name *lname, struct md_attr *ma); - int (*mdo_unlink)(const struct lu_env *env, struct md_object *pobj, - struct md_object *cobj, const struct lu_name *lname, - struct md_attr *ma); + int (*mdo_unlink)(const struct lu_env *env, struct md_object *pobj, + struct md_object *cobj, const struct lu_name *lname, + struct md_attr *ma, int no_name); + + /** This method is used to compare a requested layout to an existing + * layout (struct lov_mds_md_v1/3 vs struct lov_mds_md_v1/3) */ + int (*mdo_lum_lmm_cmp)(const struct lu_env *env, + struct md_object *cobj, + const struct md_op_spec *spec, + struct md_attr *ma); - /* partial ops for cross-ref case */ + /** partial ops for cross-ref case */ int (*mdo_name_insert)(const struct lu_env *env, struct md_object *obj, const struct lu_name *lname, @@ -278,15 +341,15 @@ struct md_dir_operations { }; struct md_device_operations { - /* meta-data device related handlers. */ - int (*mdo_root_get)(const struct lu_env *env, struct md_device *m, - struct lu_fid *f); + /** meta-data device related handlers. */ + int (*mdo_root_get)(const struct lu_env *env, struct md_device *m, + struct lu_fid *f); int (*mdo_maxsize_get)(const struct lu_env *env, struct md_device *m, int *md_size, int *cookie_size); int (*mdo_statfs)(const struct lu_env *env, struct md_device *m, - struct kstatfs *sfs); + struct obd_statfs *sfs); int (*mdo_init_capa_ctxt)(const struct lu_env *env, struct md_device *m, int mode, unsigned long timeout, __u32 alg, @@ -295,82 +358,119 @@ struct md_device_operations { int (*mdo_update_capa_key)(const struct lu_env *env, struct md_device *m, struct lustre_capa_key *key); + + int (*mdo_llog_ctxt_get)(const struct lu_env *env, + struct md_device *m, int idx, void **h); + + int (*mdo_iocontrol)(const struct lu_env *env, struct md_device *m, + unsigned int cmd, int len, void *data); }; enum md_upcall_event { - /*sync the md layer*/ + /** Sync the md layer*/ MD_LOV_SYNC = (1 << 0), - MD_NO_TRANS = (1 << 1), /* Just for split, no need trans, for replay */ - MD_LOV_CONFIG = (1 << 2) + /** Just for split, no need trans, for replay */ + MD_NO_TRANS = (1 << 1), + MD_LOV_CONFIG = (1 << 2), + /** Trigger quota recovery */ + MD_LOV_QUOTA = (1 << 3) }; struct md_upcall { - /* this lock protects upcall using against its removal + /** this lock protects upcall using against its removal * read lock is for usage the upcall, write - for init/fini */ - struct rw_semaphore mu_upcall_sem; - /* device to call, upper layer normally */ + struct rw_semaphore mu_upcall_sem; + /** device to call, upper layer normally */ struct md_device *mu_upcall_dev; - /* upcall function */ + /** upcall function */ int (*mu_upcall)(const struct lu_env *env, struct md_device *md, - enum md_upcall_event ev); + enum md_upcall_event ev, void *data); }; struct md_device { - struct lu_device md_lu_dev; - struct md_device_operations *md_ops; - struct md_upcall md_upcall; + struct lu_device md_lu_dev; + const struct md_device_operations *md_ops; + struct md_upcall md_upcall; }; static inline void md_upcall_init(struct md_device *m, void *upcl) { - init_rwsem(&m->md_upcall.mu_upcall_sem); - m->md_upcall.mu_upcall_dev = NULL; - m->md_upcall.mu_upcall = upcl; + init_rwsem(&m->md_upcall.mu_upcall_sem); + m->md_upcall.mu_upcall_dev = NULL; + m->md_upcall.mu_upcall = upcl; } static inline void md_upcall_dev_set(struct md_device *m, struct md_device *up) { - down_write(&m->md_upcall.mu_upcall_sem); - m->md_upcall.mu_upcall_dev = up; - up_write(&m->md_upcall.mu_upcall_sem); + down_write(&m->md_upcall.mu_upcall_sem); + m->md_upcall.mu_upcall_dev = up; + up_write(&m->md_upcall.mu_upcall_sem); } static inline void md_upcall_fini(struct md_device *m) { - down_write(&m->md_upcall.mu_upcall_sem); - m->md_upcall.mu_upcall_dev = NULL; - m->md_upcall.mu_upcall = NULL; - up_write(&m->md_upcall.mu_upcall_sem); + down_write(&m->md_upcall.mu_upcall_sem); + m->md_upcall.mu_upcall_dev = NULL; + m->md_upcall.mu_upcall = NULL; + up_write(&m->md_upcall.mu_upcall_sem); } static inline int md_do_upcall(const struct lu_env *env, struct md_device *m, - enum md_upcall_event ev) -{ - int rc = 0; - down_read(&m->md_upcall.mu_upcall_sem); - if (m->md_upcall.mu_upcall_dev != NULL && - m->md_upcall.mu_upcall_dev->md_upcall.mu_upcall != NULL) { - rc = m->md_upcall.mu_upcall_dev->md_upcall.mu_upcall(env, - m->md_upcall.mu_upcall_dev, ev); - } - up_read(&m->md_upcall.mu_upcall_sem); - return rc; + enum md_upcall_event ev, void *data) +{ + int rc = 0; + down_read(&m->md_upcall.mu_upcall_sem); + if (m->md_upcall.mu_upcall_dev != NULL && + m->md_upcall.mu_upcall_dev->md_upcall.mu_upcall != NULL) { + rc = m->md_upcall.mu_upcall_dev->md_upcall.mu_upcall(env, + m->md_upcall.mu_upcall_dev, + ev, data); + } + up_read(&m->md_upcall.mu_upcall_sem); + return rc; } struct md_object { - struct lu_object mo_lu; - struct md_object_operations *mo_ops; - struct md_dir_operations *mo_dir_ops; + struct lu_object mo_lu; + const struct md_object_operations *mo_ops; + const struct md_dir_operations *mo_dir_ops; }; -static inline int lu_device_is_md(const struct lu_device *d) -{ - return ergo(d != NULL, d->ld_type->ldt_tags & LU_DEVICE_MD); -} +/** + * seq-server site. + */ +struct seq_server_site { + struct lu_site *ss_lu; + /** + * mds number of this site. + */ + mdsno_t ss_node_id; + /** + * Fid location database + */ + struct lu_server_fld *ss_server_fld; + struct lu_client_fld *ss_client_fld; + + /** + * Server Seq Manager + */ + struct lu_server_seq *ss_server_seq; + + /** + * Controller Seq Manager + */ + struct lu_server_seq *ss_control_seq; + struct obd_export *ss_control_exp; + + /** + * Client Seq Manager + */ + struct lu_client_seq *ss_client_seq; +}; static inline struct md_device *lu2md_dev(const struct lu_device *d) { - LASSERT(lu_device_is_md(d)); + LASSERT(IS_ERR(d) || lu_device_is_md(d)); return container_of0(d, struct md_device, md_lu_dev); } @@ -381,7 +481,7 @@ static inline struct lu_device *md2lu_dev(struct md_device *d) static inline struct md_object *lu2md(const struct lu_object *o) { - LASSERT(lu_device_is_md(o->lo_dev)); + LASSERT(o == NULL || IS_ERR(o) || lu_device_is_md(o->lo_dev)); return container_of0(o, struct md_object, mo_lu); } @@ -392,21 +492,29 @@ static inline struct md_object *md_object_next(const struct md_object *obj) static inline struct md_device *md_obj2dev(const struct md_object *o) { - LASSERT(lu_device_is_md(o->mo_lu.lo_dev)); + LASSERT(o == NULL || IS_ERR(o) || lu_device_is_md(o->mo_lu.lo_dev)); return container_of0(o->mo_lu.lo_dev, struct md_device, md_lu_dev); } static inline int md_device_init(struct md_device *md, struct lu_device_type *t) { - return lu_device_init(&md->md_lu_dev, t); + return lu_device_init(&md->md_lu_dev, t); } static inline void md_device_fini(struct md_device *md) { - lu_device_fini(&md->md_lu_dev); + lu_device_fini(&md->md_lu_dev); +} + +static inline struct md_object *md_object_find_slice(const struct lu_env *env, + struct md_device *md, + const struct lu_fid *f) +{ + return lu2md(lu_object_find_slice(env, md2lu_dev(md), f, NULL)); } -/* md operations */ + +/** md operations */ static inline int mo_permission(const struct lu_env *env, struct md_object *p, struct md_object *c, @@ -433,6 +541,14 @@ static inline int mo_readlink(const struct lu_env *env, return m->mo_ops->moo_readlink(env, m, buf); } +static inline int mo_changelog(const struct lu_env *env, + enum changelog_rec_type type, + int flags, struct md_object *m) +{ + LASSERT(m->mo_ops->moo_changelog); + return m->mo_ops->moo_changelog(env, type, flags, m); +} + static inline int mo_attr_set(const struct lu_env *env, struct md_object *m, const struct md_attr *at) @@ -476,6 +592,17 @@ static inline int mo_xattr_list(const struct lu_env *env, return m->mo_ops->moo_xattr_list(env, m, buf); } +static inline int mo_swap_layouts(const struct lu_env *env, + struct md_object *o1, + struct md_object *o2, __u64 flags) +{ + LASSERT(o1->mo_ops->moo_swap_layouts); + LASSERT(o2->mo_ops->moo_swap_layouts); + if (o1->mo_ops->moo_swap_layouts != o2->mo_ops->moo_swap_layouts) + return -EPERM; + return o1->mo_ops->moo_swap_layouts(env, o1, o2, flags); +} + static inline int mo_open(const struct lu_env *env, struct md_object *m, int flags) @@ -486,10 +613,11 @@ static inline int mo_open(const struct lu_env *env, static inline int mo_close(const struct lu_env *env, struct md_object *m, - struct md_attr *ma) + struct md_attr *ma, + int mode) { LASSERT(m->mo_ops->moo_close); - return m->mo_ops->moo_close(env, m, ma); + return m->mo_ops->moo_close(env, m, ma, mode); } static inline int mo_readpage(const struct lu_env *env, @@ -534,6 +662,39 @@ static inline int mo_capa_get(const struct lu_env *env, return m->mo_ops->moo_capa_get(env, m, c, renewal); } +static inline int mo_object_sync(const struct lu_env *env, struct md_object *m) +{ + LASSERT(m->mo_ops->moo_object_sync); + return m->mo_ops->moo_object_sync(env, m); +} + +static inline int mo_file_lock(const struct lu_env *env, struct md_object *m, + struct lov_mds_md *lmm, + struct ldlm_extent *extent, + struct lustre_handle *lockh) +{ + LASSERT(m->mo_ops->moo_file_lock); + return m->mo_ops->moo_file_lock(env, m, lmm, extent, lockh); +} + +static inline int mo_file_unlock(const struct lu_env *env, struct md_object *m, + struct lov_mds_md *lmm, + struct lustre_handle *lockh) +{ + LASSERT(m->mo_ops->moo_file_unlock); + return m->mo_ops->moo_file_unlock(env, m, lmm, lockh); +} + +static inline int mo_object_lock(const struct lu_env *env, + struct md_object *m, + struct lustre_handle *lh, + struct ldlm_enqueue_info *einfo, + void *policy) +{ + LASSERT(m->mo_ops->moo_object_lock); + return m->mo_ops->moo_object_lock(env, m, lh, einfo, policy); +} + static inline int mdo_lookup(const struct lu_env *env, struct md_object *p, const struct lu_name *lname, @@ -560,8 +721,8 @@ static inline int mdo_create(const struct lu_env *env, struct md_op_spec *spc, struct md_attr *at) { - LASSERT(c->mo_dir_ops->mdo_create); - return c->mo_dir_ops->mdo_create(env, p, lchild_name, c, spc, at); + LASSERT(p->mo_dir_ops->mdo_create); + return p->mo_dir_ops->mdo_create(env, p, lchild_name, c, spc, at); } static inline int mdo_create_data(const struct lu_env *env, @@ -608,13 +769,22 @@ static inline int mdo_link(const struct lu_env *env, } static inline int mdo_unlink(const struct lu_env *env, - struct md_object *p, - struct md_object *c, - const struct lu_name *lname, - struct md_attr *ma) + struct md_object *p, + struct md_object *c, + const struct lu_name *lname, + struct md_attr *ma, int no_name) +{ + LASSERT(p->mo_dir_ops->mdo_unlink); + return p->mo_dir_ops->mdo_unlink(env, p, c, lname, ma, no_name); +} + +static inline int mdo_lum_lmm_cmp(const struct lu_env *env, + struct md_object *c, + const struct md_op_spec *spec, + struct md_attr *ma) { - LASSERT(c->mo_dir_ops->mdo_unlink); - return c->mo_dir_ops->mdo_unlink(env, p, c, lname, ma); + LASSERT(c->mo_dir_ops->mdo_lum_lmm_cmp); + return c->mo_dir_ops->mdo_lum_lmm_cmp(env, c, spec, ma); } static inline int mdo_name_insert(const struct lu_env *env, @@ -652,4 +822,82 @@ static inline int mdo_rename_tgt(const struct lu_env *env, } } +/** + * Used in MDD/OUT layer for object lock rule + **/ +enum mdd_object_role { + MOR_SRC_PARENT, + MOR_SRC_CHILD, + MOR_TGT_PARENT, + MOR_TGT_CHILD, + MOR_TGT_ORPHAN +}; + +struct dt_device; +/** + * Structure to hold object information. This is used to create object + * \pre llod_dir exist + */ +struct lu_local_obj_desc { + const char *llod_dir; + const char *llod_name; + __u32 llod_oid; + int llod_is_index; + const struct dt_index_features *llod_feat; + cfs_list_t llod_linkage; +}; + +int lustre_buf2som(void *buf, int rc, struct md_som_data *msd); +int lustre_buf2hsm(void *buf, int rc, struct md_hsm *mh); +void lustre_hsm2buf(void *buf, struct md_hsm *mh); + +enum { + UCRED_INVALID = -1, + UCRED_INIT = 0, + UCRED_OLD = 1, + UCRED_NEW = 2, +}; + +struct lu_ucred { + __u32 uc_valid; + __u32 uc_o_uid; + __u32 uc_o_gid; + __u32 uc_o_fsuid; + __u32 uc_o_fsgid; + __u32 uc_uid; + __u32 uc_gid; + __u32 uc_fsuid; + __u32 uc_fsgid; + __u32 uc_suppgids[2]; + cfs_cap_t uc_cap; + __u32 uc_umask; + cfs_group_info_t *uc_ginfo; + struct md_identity *uc_identity; +}; + +struct lu_ucred *lu_ucred(const struct lu_env *env); + +struct lu_ucred *lu_ucred_check(const struct lu_env *env); + +struct lu_ucred *lu_ucred_assert(const struct lu_env *env); + +int lu_ucred_global_init(void); + +void lu_ucred_global_fini(void); + +#define md_cap_t(x) (x) + +#define MD_CAP_TO_MASK(x) (1 << (x)) + +#define md_cap_raised(c, flag) (md_cap_t(c) & MD_CAP_TO_MASK(flag)) + +/* capable() is copied from linux kernel! */ +static inline int md_capable(struct lu_ucred *uc, cfs_cap_t cap) +{ + if (md_cap_raised(uc->uc_cap, cap)) + return 1; + return 0; +} + +/** @} md */ #endif /* _LINUX_MD_OBJECT_H */