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      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 2008 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
     32 extern "C" {
     33 #endif
     34 
     35 #include <sys/filep.h>
     36 #include <sys/dirent.h>
     37 #include <sys/bootstat.h>
     38 
     39 /* same as those in /usr/include/unistd.h */
     40 #define	SEEK_SET	0	/* Offset */
     41 #define	SEEK_CUR	1	/* Current + Offset */
     42 #define	SEEK_END	2	/* EOF + Offset */
     43 
     44 /* mountroot/unmountroot return values */
     45 #define	VFS_SUCCESS	0
     46 #define	VFS_FAILURE	-1
     47 
     48 /*
     49  * unified (vfs-like) file system operations for booters
     50  */
     51 
     52 struct boot_fs_ops {
     53     char	*fsw_name;
     54     int		(*fsw_mountroot)(char *str);
     55     int		(*fsw_unmountroot)(void);
     56     int		(*fsw_open)(char *filename, int flags);
     57     int		(*fsw_close)(int fd);
     58     ssize_t	(*fsw_read)(int fd, caddr_t buf, size_t size);
     59     off_t	(*fsw_lseek)(int filefd, off_t addr, int whence);
     60     int		(*fsw_fstat)(int filefd, struct bootstat *buf);
     61     void	(*fsw_closeall)(int flag);
     62     int		(*fsw_getdents)(int fd, struct dirent *buf, unsigned size);
     63 };
     64 
     65 /*
     66  *  Function prototypes
     67  *
     68  *	fstat() (if exists) supports size and mode right now.
     69  */
     70 
     71 extern	int	mountroot(char *str);
     72 extern	int	unmountroot(void);
     73 extern	int	open(const char *filename, int flags);
     74 extern	int	close(int fd);
     75 extern	ssize_t	read(int fd, void *buf, size_t size);
     76 extern	off_t	lseek(int filefd, off_t addr, int whence);
     77 extern	int	fstat(int fd, struct stat *buf);
     78 extern	int	stat(const char *filename, struct stat *buf);
     79 
     80 /*
     81  * The compfs filesystem provides additional fsswitch-like entry points,
     82  * though these are not yet hooked properly into the fsswitch.
     83  */
     84 
     85 extern	void	closeall(int flag);
     86 
     87 extern	ssize_t	kern_read(int fd, caddr_t buf, size_t size);
     88 extern	int	kern_open(char *filename, int flags);
     89 extern	off_t	kern_seek(int fd, off_t hi, off_t lo);
     90 extern	off_t	kern_lseek(int fd, off_t hi, off_t lo);
     91 extern	int	kern_close(int fd);
     92 extern	int	kern_fstat(int fd, struct bootstat *buf);
     93 extern	int	kern_getdents(int fd, struct dirent *buf, size_t size);
     94 extern	int	kern_mountroot(char *path);
     95 extern	int	kern_unmountroot(void);
     96 
     97 /*
     98  * these are for common fs switch interface routines
     99  */
    100 extern	int	boot_no_ops(void);	/* no ops entry */
    101 extern	void	boot_no_ops_void(void);	/* no ops entry */
    102 
    103 extern	struct boot_fs_ops *get_default_fs(void);
    104 extern	struct boot_fs_ops *get_fs_ops_pointer(char *fsw_name);
    105 extern	void	set_default_fs(char *fsw_name);
    106 extern	void	clr_default_fs(void);
    107 extern	char 	*set_fstype(char *v2path, char *bpath);
    108 
    109 #ifdef __cplusplus
    110 }
    111 #endif
    112 
    113 #endif /* _SYS_BOOTVFS_H */
    114