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[fs/lustre-release.git] / lustre / include / lustre_eacl.h
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
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.
9  *
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).
15  *
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
19  *
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
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  */
30 /*
31  * Copyright (c) 2012 Whamcloud, Inc.
32  */
33 /*
34  * This file is part of Lustre, http://www.lustre.org/
35  * Lustre is a trademark of Sun Microsystems, Inc.
36  *
37  * lustre/lustre/include/lustre_idmap.h
38  *
39  * MDS data structures.
40  * See also lustre_idl.h for wire formats of requests.
41  */
42
43 #ifndef _LUSTRE_EACL_H
44 #define _LUSTRE_EACL_H
45
46 /** \defgroup eacl eacl
47  *
48  * @{
49  */
50
51 #ifdef CONFIG_FS_POSIX_ACL
52
53 #include <linux/posix_acl_xattr.h>
54
55 #include <lustre_idmap.h>
56 #include <md_object.h>
57 #include <lu_object.h>
58
59 typedef struct {
60         __u16                   e_tag;
61         __u16                   e_perm;
62         __u32                   e_id;
63         __u32                   e_stat;
64 } ext_acl_xattr_entry;
65
66 typedef struct {
67         __u32                   a_count;
68         ext_acl_xattr_entry     a_entries[0];
69 } ext_acl_xattr_header;
70
71 #define CFS_ACL_XATTR_SIZE(count, prefix) \
72         (sizeof(prefix ## _header) + (count) * sizeof(prefix ## _entry))
73
74 #define CFS_ACL_XATTR_COUNT(size, prefix) \
75         (((size) - sizeof(prefix ## _header)) / sizeof(prefix ## _entry))
76
77 extern int lustre_posix_acl_permission(struct md_ucred *mu, struct lu_attr *la,
78                                        int want, posix_acl_xattr_entry *entry,
79                                        int count);
80 extern int lustre_posix_acl_chmod_masq(posix_acl_xattr_entry *entry,
81                                        __u32 mode, int count);
82 extern int lustre_posix_acl_create_masq(posix_acl_xattr_entry *entry,
83                                         __u32 *pmode, int count);
84
85 extern ext_acl_xattr_header *
86 lustre_posix_acl_xattr_2ext(posix_acl_xattr_header *header, int size);
87 extern int
88 lustre_posix_acl_xattr_filter(posix_acl_xattr_header *header, int size,
89                               posix_acl_xattr_header **out);
90 extern int
91 lustre_posix_acl_xattr_id2client(struct md_ucred *mu,
92                                  struct lustre_idmap_table *t,
93                                  posix_acl_xattr_header *header,
94                                  int size, int flags);
95 extern void
96 lustre_posix_acl_xattr_free(posix_acl_xattr_header *header, int size);
97 extern int
98 lustre_ext_acl_xattr_id2server(struct md_ucred *mu,
99                                struct lustre_idmap_table *t,
100                                ext_acl_xattr_header *header);
101 extern void
102 lustre_ext_acl_xattr_free(ext_acl_xattr_header *header);
103 extern int
104 lustre_acl_xattr_merge2posix(posix_acl_xattr_header *posix_header, int size,
105                              ext_acl_xattr_header *ext_header,
106                              posix_acl_xattr_header **out);
107 extern ext_acl_xattr_header *
108 lustre_acl_xattr_merge2ext(posix_acl_xattr_header *posix_header, int size,
109                            ext_acl_xattr_header *ext_header);
110
111 #endif /* CONFIG_FS_POSIX_ACL */
112
113 /** @} eacl */
114
115 #endif