1/*-
  2 * SPDX-License-Identifier: BSD-2-Clause
  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/*
 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#define	EXTATTR_MAXNAMELEN	NAME_MAX
 61
 62#ifdef _KERNEL
 63#include <sys/types.h>
 64
 65struct thread;
 66struct ucred;
 67struct vnode;
 68int	extattr_check_cred(struct vnode *vp, int attrnamespace,
 69	    struct ucred *cred, struct thread *td, accmode_t accmode);
 70
 71#else
 72#include <sys/cdefs.h>
 73
 74struct iovec;
 75
 76__BEGIN_DECLS
 77int	extattrctl(const char *_path, int _cmd, const char *_filename,
 78	    int _attrnamespace, const char *_attrname);
 79int	extattr_delete_fd(int _fd, int _attrnamespace, const char *_attrname);
 80int	extattr_delete_file(const char *_path, int _attrnamespace,
 81	    const char *_attrname);
 82int	extattr_delete_link(const char *_path, int _attrnamespace,
 83	    const char *_attrname);
 84ssize_t	extattr_get_fd(int _fd, int _attrnamespace, const char *_attrname,
 85	    void *_data, size_t _nbytes);
 86ssize_t	extattr_get_file(const char *_path, int _attrnamespace,
 87	    const char *_attrname, void *_data, size_t _nbytes);
 88ssize_t	extattr_get_link(const char *_path, int _attrnamespace,
 89	    const char *_attrname, void *_data, size_t _nbytes);
 90ssize_t	extattr_list_fd(int _fd, int _attrnamespace, void *_data,
 91	    size_t _nbytes);
 92ssize_t	extattr_list_file(const char *_path, int _attrnamespace, void *_data,
 93	    size_t _nbytes);
 94ssize_t	extattr_list_link(const char *_path, int _attrnamespace, void *_data,
 95	    size_t _nbytes);
 96ssize_t	extattr_set_fd(int _fd, int _attrnamespace, const char *_attrname,
 97	    const void *_data, size_t _nbytes);
 98ssize_t	extattr_set_file(const char *_path, int _attrnamespace,
 99	    const char *_attrname, const void *_data, size_t _nbytes);
100ssize_t	extattr_set_link(const char *_path, int _attrnamespace,
101	    const char *_attrname, const void *_data, size_t _nbytes);
102__END_DECLS
103
104#endif /* !_KERNEL */
105#endif /* !_SYS_EXTATTR_H_ */