diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/include/lustre_idmap.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/include/lustre_idmap.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/include/lustre_idmap.h b/drivers/staging/lustre/lustre/include/lustre_idmap.h new file mode 100644 index 000000000000..084bdd6ab4db --- /dev/null +++ b/drivers/staging/lustre/lustre/include/lustre_idmap.h @@ -0,0 +1,104 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * 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. + * + * 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). + * + * 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 + * + * 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. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * lustre/lustre/include/lustre_idmap.h + * + * MDS data structures. + * See also lustre_idl.h for wire formats of requests. + */ + +#ifndef _LUSTRE_IDMAP_H +#define _LUSTRE_IDMAP_H + +/** \defgroup idmap idmap + * + * @{ + */ + +#include <linux/libcfs/libcfs.h> + +#define CFS_NGROUPS_PER_BLOCK ((int)(PAGE_CACHE_SIZE / sizeof(gid_t))) + +#define CFS_GROUP_AT(gi, i) \ + ((gi)->blocks[(i) / CFS_NGROUPS_PER_BLOCK][(i) % CFS_NGROUPS_PER_BLOCK]) + +enum { + CFS_IC_NOTHING = 0, /* convert nothing */ + CFS_IC_ALL = 1, /* convert all items */ + CFS_IC_MAPPED = 2, /* convert mapped uid/gid */ + CFS_IC_UNMAPPED = 3 /* convert unmapped uid/gid */ +}; + +#define CFS_IDMAP_NOTFOUND (-1) + +#define CFS_IDMAP_HASHSIZE 32 + +enum lustre_idmap_idx { + RMT_UIDMAP_IDX, + LCL_UIDMAP_IDX, + RMT_GIDMAP_IDX, + LCL_GIDMAP_IDX, + CFS_IDMAP_N_HASHES +}; + +struct lustre_idmap_table { + spinlock_t lit_lock; + struct list_head lit_idmaps[CFS_IDMAP_N_HASHES][CFS_IDMAP_HASHSIZE]; +}; + +struct lu_ucred; + +extern void lustre_groups_from_list(group_info_t *ginfo, gid_t *glist); +extern void lustre_groups_sort(group_info_t *group_info); +extern int lustre_in_group_p(struct lu_ucred *mu, gid_t grp); + +extern int lustre_idmap_add(struct lustre_idmap_table *t, + uid_t ruid, uid_t luid, + gid_t rgid, gid_t lgid); +extern int lustre_idmap_del(struct lustre_idmap_table *t, + uid_t ruid, uid_t luid, + gid_t rgid, gid_t lgid); +extern int lustre_idmap_lookup_uid(struct lu_ucred *mu, + struct lustre_idmap_table *t, + int reverse, uid_t uid); +extern int lustre_idmap_lookup_gid(struct lu_ucred *mu, + struct lustre_idmap_table *t, + int reverse, gid_t gid); +extern struct lustre_idmap_table *lustre_idmap_init(void); +extern void lustre_idmap_fini(struct lustre_idmap_table *t); + +/** @} idmap */ + +#endif |