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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/lustre/include/lustre_idmap.h
34 * MDS data structures.
35 * See also lustre_idl.h for wire formats of requests.
38 #ifndef _LUSTRE_IDMAP_H
39 #define _LUSTRE_IDMAP_H
41 /** \defgroup idmap idmap
46 #include <libcfs/libcfs.h>
48 #ifdef HAVE_GROUP_INFO_GID
50 #define CFS_GROUP_AT(gi, i) ((gi)->gid[(i)])
52 #else /* !HAVE_GROUP_INFO_GID */
54 #define CFS_NGROUPS_PER_BLOCK ((int)(PAGE_SIZE / sizeof(gid_t)))
56 #define CFS_GROUP_AT(gi, i) \
57 ((gi)->blocks[(i) / CFS_NGROUPS_PER_BLOCK][(i) % CFS_NGROUPS_PER_BLOCK])
59 #endif /* HAVE_GROUP_INFO_GID */
61 #include <linux/cred.h>
65 extern void lustre_groups_from_list(struct group_info *ginfo, gid_t *glist);
66 extern void lustre_groups_sort(struct group_info *group_info);
67 extern int lustre_in_group_p(struct lu_ucred *mu, gid_t grp);