Whamcloud - gitweb
LU-4357 libcfs: restore __GFP_WAIT flag to memalloc calls
[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, Intel Corporation.
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 typedef struct {
56         __u16                   e_tag;
57         __u16                   e_perm;
58         __u32                   e_id;
59         __u32                   e_stat;
60 } ext_acl_xattr_entry;
61
62 typedef struct {
63         __u32                   a_count;
64         ext_acl_xattr_entry     a_entries[0];
65 } ext_acl_xattr_header;
66
67 #define CFS_ACL_XATTR_SIZE(count, prefix) \
68         (sizeof(prefix ## _header) + (count) * sizeof(prefix ## _entry))
69
70 #define CFS_ACL_XATTR_COUNT(size, prefix) \
71         (((size) - sizeof(prefix ## _header)) / sizeof(prefix ## _entry))
72
73 #ifdef HAVE_SERVER_SUPPORT
74 struct lu_ucred;
75 struct lu_attr;
76 struct lustre_idmap_table;
77
78 extern int lustre_posix_acl_permission(struct lu_ucred *mu,
79                                         const struct lu_attr *la, int want,
80                                         posix_acl_xattr_entry *entry,
81                                         int count);
82 extern int lustre_posix_acl_chmod_masq(posix_acl_xattr_entry *entry,
83                                        __u32 mode, int count);
84 extern int lustre_posix_acl_create_masq(posix_acl_xattr_entry *entry,
85                                         __u32 *pmode, int count);
86 extern int lustre_posix_acl_equiv_mode(posix_acl_xattr_entry *entry, mode_t *mode_p,
87                                        int count);
88
89 extern int
90 lustre_posix_acl_xattr_id2client(struct lu_ucred *mu,
91                                  struct lustre_idmap_table *t,
92                                  posix_acl_xattr_header *header,
93                                  int size, int flags);
94
95 extern int
96 lustre_ext_acl_xattr_id2server(struct lu_ucred *mu,
97                                struct lustre_idmap_table *t,
98                                ext_acl_xattr_header *header);
99 #endif /* HAVE_SERVER_SUPPORT */
100
101 extern ext_acl_xattr_header *
102 lustre_posix_acl_xattr_2ext(posix_acl_xattr_header *header, int size);
103 extern int
104 lustre_posix_acl_xattr_filter(posix_acl_xattr_header *header, int size,
105                               posix_acl_xattr_header **out);
106 extern void
107 lustre_posix_acl_xattr_free(posix_acl_xattr_header *header, int size);
108 extern void
109 lustre_ext_acl_xattr_free(ext_acl_xattr_header *header);
110 extern int
111 lustre_acl_xattr_merge2posix(posix_acl_xattr_header *posix_header, int size,
112                              ext_acl_xattr_header *ext_header,
113                              posix_acl_xattr_header **out);
114 extern ext_acl_xattr_header *
115 lustre_acl_xattr_merge2ext(posix_acl_xattr_header *posix_header, int size,
116                            ext_acl_xattr_header *ext_header);
117
118 #endif /* CONFIG_FS_POSIX_ACL */
119
120 /** @} eacl */
121
122 #endif