FreeBSD/Linux Kernel Cross Reference
sys/sys/extattr.h
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1999-2001 Robert N. M. Watson
5 * All rights reserved.
6 *
7 * This software was developed by Robert Watson for the TrustedBSD Project.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $FreeBSD$
31 */
32 /*
33 * Developed by the TrustedBSD Project.
34 * Support for extended filesystem attributes.
35 */
36
37 #ifndef _SYS_EXTATTR_H_
38 #define _SYS_EXTATTR_H_
39
40 /*
41 * Defined name spaces for extended attributes. Numeric constants are passed
42 * via system calls, but a user-friendly string is also defined.
43 */
44 #define EXTATTR_NAMESPACE_EMPTY 0x00000000
45 #define EXTATTR_NAMESPACE_EMPTY_STRING "empty"
46 #define EXTATTR_NAMESPACE_USER 0x00000001
47 #define EXTATTR_NAMESPACE_USER_STRING "user"
48 #define EXTATTR_NAMESPACE_SYSTEM 0x00000002
49 #define EXTATTR_NAMESPACE_SYSTEM_STRING "system"
50
51 /*
52 * The following macro is designed to initialize an array that maps
53 * extended-attribute namespace values to their names, e.g.:
54 *
55 * char *extattr_namespace_names[] = EXTATTR_NAMESPACE_NAMES;
56 */
57 #define EXTATTR_NAMESPACE_NAMES { \
58 EXTATTR_NAMESPACE_EMPTY_STRING, \
59 EXTATTR_NAMESPACE_USER_STRING, \
60 EXTATTR_NAMESPACE_SYSTEM_STRING }
61
62 #define EXTATTR_MAXNAMELEN NAME_MAX
63
64 #ifdef _KERNEL
65 #include <sys/types.h>
66
67 struct thread;
68 struct ucred;
69 struct vnode;
70 int extattr_check_cred(struct vnode *vp, int attrnamespace,
71 struct ucred *cred, struct thread *td, accmode_t accmode);
72
73 #else
74 #include <sys/cdefs.h>
75
76 struct iovec;
77
78 __BEGIN_DECLS
79 int extattrctl(const char *_path, int _cmd, const char *_filename,
80 int _attrnamespace, const char *_attrname);
81 int extattr_delete_fd(int _fd, int _attrnamespace, const char *_attrname);
82 int extattr_delete_file(const char *_path, int _attrnamespace,
83 const char *_attrname);
84 int extattr_delete_link(const char *_path, int _attrnamespace,
85 const char *_attrname);
86 ssize_t extattr_get_fd(int _fd, int _attrnamespace, const char *_attrname,
87 void *_data, size_t _nbytes);
88 ssize_t extattr_get_file(const char *_path, int _attrnamespace,
89 const char *_attrname, void *_data, size_t _nbytes);
90 ssize_t extattr_get_link(const char *_path, int _attrnamespace,
91 const char *_attrname, void *_data, size_t _nbytes);
92 ssize_t extattr_list_fd(int _fd, int _attrnamespace, void *_data,
93 size_t _nbytes);
94 ssize_t extattr_list_file(const char *_path, int _attrnamespace, void *_data,
95 size_t _nbytes);
96 ssize_t extattr_list_link(const char *_path, int _attrnamespace, void *_data,
97 size_t _nbytes);
98 ssize_t extattr_set_fd(int _fd, int _attrnamespace, const char *_attrname,
99 const void *_data, size_t _nbytes);
100 ssize_t extattr_set_file(const char *_path, int _attrnamespace,
101 const char *_attrname, const void *_data, size_t _nbytes);
102 ssize_t extattr_set_link(const char *_path, int _attrnamespace,
103 const char *_attrname, const void *_data, size_t _nbytes);
104 __END_DECLS
105
106 #endif /* !_KERNEL */
107 #endif /* !_SYS_EXTATTR_H_ */
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