tmpfs - Fix write-append/mmap-read race
[dragonfly.git] / sys / vfs / tmpfs / tmpfs_args.h
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1/* $NetBSD: tmpfs_args.h,v 1.3 2008/07/29 09:10:09 pooka Exp $ */
2
3/*
4 * Copyright (c) 2005, 2006, 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code
9 * 2005 program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#ifndef _VFS_TMPFS_TMPFS_ARGS_H_
34#define _VFS_TMPFS_TMPFS_ARGS_H_
35
36/*
37 * This structure is used to communicate mount parameters between userland
38 * and kernel space.
39 */
817a2fd9 40#define TMPFS_ARGS_VERSION 2
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41struct tmpfs_args {
42 int ta_version;
43
44 /* Size counters. */
45 ino_t ta_nodes_max;
46 off_t ta_size_max;
817a2fd9 47 size_t ta_maxfsize_max;
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48
49 /* Root node attributes. */
50 uid_t ta_root_uid;
51 gid_t ta_root_gid;
52 mode_t ta_root_mode;
53};
54
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55#define MNT_GID 0x00000001
56#define MNT_UID 0x00000002
57#define MNT_MODE 0x00000004
58#define MNT_INODES 0x00000008
59#define MNT_SIZE 0x00000010
60#define MNT_MAXFSIZE 0x00000020
61
7a2de9a4 62#endif /* _VFS_TMPFS_TMPFS_ARGS_H_ */