sysctlfs.h

/*
 * (c) 2002 Pawel Jakub Dawidek <nick@garage.freebsd.pl>
 *
 * $Id: sysctlfs.h,v 1.6 2002/12/24 07:20:16 jules Exp $
 *
 */

#define	MAXSYSCTLBUF	1024

/*
 * The different types of node in a sysctlfs file system
 */
typedef enum {
	Sroot,		/* the filesystem root */
	Snode,		/* sysctl node */
	Sctl		/* sysctl (the last component) */
} scfstype;

/*
 * control data for the sysctl file system.
 */
struct scfsnode {
	struct scfsnode	*scfs_next;	/* next on list */
	struct vnode	*scfs_vnode;	/* vnode associated with this scfsnode */
	scfstype		scfs_type;	/* type of sysctlfs node */
	struct sysctl_oid	*scfs_oidp;
	u_short		scfs_mode;	/* mode bits for stat() */
	u_long		scfs_flags;	/* open flags */
	u_long		scfs_fileno;	/* unique file id */
	pid_t		scfs_lockowner;	/* scfs lock owner */
};

/*
 * Kernel stuff follows
 */
#ifdef _KERNEL
/*
 * Convert between scfsnode vnode
 */
#define VTOSCFS(vp)	((struct scfsnode *)(vp)->v_data)
#define SCFSTOV(scfs)	((scfs)->scfs_vnode)

int sysctlfs_freevp __P((struct vnode *));
int sysctlfs_allocvp __P((struct mount *, struct vnode **, struct sysctl_oid *, scfstype));
int sysctlfs_findparent __P((struct mount *, struct sysctl_oid *, struct sysctl_oid **));

#define SYSCTLFS_LOCKED	0x01
#define SYSCTLFS_WANT	0x02

#if __FreeBSD_version < 600007
extern vop_t **sysctlfs_vnodeop_p;
#else
extern struct vop_vector sysctlfs_vnodeops;
#endif

#if __FreeBSD_version < 502123
int	sysctlfs_root __P((struct mount *, struct vnode **));
#elif __FreeBSD_version < 600023
int	sysctlfs_root __P((struct mount *, struct vnode **, struct thread *));
#elif __FreeBSD_version < 800087
int	sysctlfs_root __P((struct mount *, int, struct vnode **, struct thread *));
#else
int	sysctlfs_root __P((struct mount *, int, struct vnode **));
#endif
int	sysctlfs_read __P((struct vop_read_args *));
int	sysctlfs_write __P((struct vop_write_args *));
#if __FreeBSD_version < 500028
int	sysctlfs_sysctl(struct proc *, struct sysctl_oid *, void *, size_t *,
	    void *, size_t, size_t *);
int	sysctlfs_getval(struct proc *, struct sysctl_oid *, char **, size_t *);
int	sysctlfs_putval(struct proc *, struct sysctl_oid *, char *, size_t);
#else
int	sysctlfs_sysctl(struct thread *, struct sysctl_oid *, void *, size_t *,
	    void *, size_t, size_t *);
int	sysctlfs_getval(struct thread *, struct sysctl_oid *, char **, size_t *);
int	sysctlfs_putval(struct thread *, struct sysctl_oid *, char *, size_t);
#endif
#endif /* _KERNEL */