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