1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#ifndef	_SYS_BOOTVFS_H
27#define	_SYS_BOOTVFS_H
28
29#pragma ident	"%Z%%M%	%I%	%E% SMI"
30
31#ifdef __cplusplus
32extern "C" {
33#endif
34
35#include <sys/bootstat.h>
36#include <sys/dirent.h>
37
38/* same as those in /usr/include/unistd.h */
39#define	SEEK_SET	0	/* Offset */
40#define	SEEK_CUR	1	/* Current + Offset */
41#define	SEEK_END	2	/* EOF + Offset */
42
43/* mountroot/unmountroot return values */
44#define	VFS_SUCCESS	0
45#define	VFS_FAILURE	-1
46
47/*
48 * unified (vfs-like) file system operations for booters
49 */
50
51struct boot_fs_ops {
52    char	*fsw_name;
53    int		(*fsw_mountroot)(char *str);
54    int		(*fsw_unmountroot)(void);
55    int		(*fsw_open)(char *filename, int flags);
56    int		(*fsw_close)(int fd);
57    ssize_t	(*fsw_read)(int fd, caddr_t buf, size_t size);
58    off_t	(*fsw_lseek)(int filefd, off_t addr, int whence);
59    int		(*fsw_fstat)(int filefd, struct bootstat *buf);
60    void	(*fsw_closeall)(int flag);
61    int		(*fsw_getdents)(int fd, struct dirent *buf, unsigned size);
62};
63
64/*
65 *  Function prototypes
66 *
67 *	fstat() (if exists) supports size and mode right now.
68 */
69
70extern struct boot_fs_ops *bfs_ops;
71
72#define	BRD_MOUNTROOT(ops, str)		((ops)->fsw_mountroot)(str)
73#define	BRD_UNMOUNTROOT(ops)		((ops)->fsw_unmountroot)()
74#define	BRD_OPEN(ops, file, flag)	((ops)->fsw_open)(file, flag)
75#define	BRD_CLOSE(ops, fd)		((ops)->fsw_close)(fd)
76#define	BRD_READ(ops, fd, buf, s)	((ops)->fsw_read)(fd, buf, s)
77#define	BRD_SEEK(ops, fd, addr, w)	((ops)->fsw_lseek)(fd, addr, w)
78#define	BRD_FSTAT(ops, fd, stp)		((ops)->fsw_fstat)(fd, stp)
79
80#ifdef _BOOT
81
82extern	int	mountroot(char *str);
83extern	int	unmountroot(void);
84extern	int	open(const char *filename, int flags);
85extern	int	close(int fd);
86extern	ssize_t	read(int fd, void *buf, size_t size);
87extern	off_t	lseek(int filefd, off_t addr, int whence);
88extern	void	closeall(int flag);
89
90#endif /* _BOOT */
91
92#ifdef __cplusplus
93}
94#endif
95
96#endif /* _SYS_BOOTVFS_H */
97