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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 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/lustre/include/lustre_idmap.h
38 * MDS data structures.
39 * See also lustre_idl.h for wire formats of requests.
42 #ifndef _LUSTRE_IDMAP_H
43 #define _LUSTRE_IDMAP_H
45 /** \defgroup idmap idmap
50 #include <libcfs/libcfs.h>
52 #define CFS_NGROUPS_PER_BLOCK ((int)(PAGE_CACHE_SIZE / sizeof(gid_t)))
54 #define CFS_GROUP_AT(gi, i) \
55 ((gi)->blocks[(i) / CFS_NGROUPS_PER_BLOCK][(i) % CFS_NGROUPS_PER_BLOCK])
58 CFS_IC_NOTHING = 0, /* convert nothing */
59 CFS_IC_ALL = 1, /* convert all items */
60 CFS_IC_MAPPED = 2, /* convert mapped uid/gid */
61 CFS_IC_UNMAPPED = 3 /* convert unmapped uid/gid */
64 #define CFS_IDMAP_NOTFOUND (-1)
66 #define CFS_IDMAP_HASHSIZE 32
68 enum lustre_idmap_idx {
76 struct lustre_idmap_table {
78 struct list_head lit_idmaps[CFS_IDMAP_N_HASHES][CFS_IDMAP_HASHSIZE];
83 extern void lustre_groups_from_list(struct group_info *ginfo, gid_t *glist);
84 extern void lustre_groups_sort(struct group_info *group_info);
85 extern int lustre_in_group_p(struct lu_ucred *mu, gid_t grp);
87 extern int lustre_idmap_add(struct lustre_idmap_table *t,
88 uid_t ruid, uid_t luid,
89 gid_t rgid, gid_t lgid);
90 extern int lustre_idmap_del(struct lustre_idmap_table *t,
91 uid_t ruid, uid_t luid,
92 gid_t rgid, gid_t lgid);
93 extern int lustre_idmap_lookup_uid(struct lu_ucred *mu,
94 struct lustre_idmap_table *t,
95 int reverse, uid_t uid);
96 extern int lustre_idmap_lookup_gid(struct lu_ucred *mu,
97 struct lustre_idmap_table *t,
98 int reverse, gid_t gid);
99 extern struct lustre_idmap_table *lustre_idmap_init(void);
100 extern void lustre_idmap_fini(struct lustre_idmap_table *t);