freebsd-dev/sys/miscfs/fdesc/fdesc.h
Bruce Evans f57e65478d Introduced a type `vop_t' for vnode operation functions and used
it 1138 times (:-() in casts and a few more times in declarations.
This change is null for the i386.

The type has to be `typedef int vop_t(void *)' and not `typedef
int vop_t()' because `gcc -Wstrict-prototypes' warns about the
latter.  Since vnode op functions are called with args of different
(struct pointer) types, neither of these function types is any use
for type checking of the arg, so it would be preferable not to use
the complete function type, especially since using the complete
type requires adding 1138 casts to avoid compiler warnings and
another 40+ casts to reverse the function pointer conversions before
calling the functions.
1995-11-09 08:17:23 +00:00

83 lines
3.0 KiB
C

/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software donated to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)fdesc.h 8.5 (Berkeley) 1/21/94
*
* $Id: fdesc.h,v 1.1.1.1 1994/05/24 10:04:59 rgrimes Exp $
*/
#ifdef KERNEL
struct fdescmount {
struct vnode *f_root; /* Root node */
};
#define FD_ROOT 2
#define FD_DEVFD 3
#define FD_STDIN 4
#define FD_STDOUT 5
#define FD_STDERR 6
#define FD_CTTY 7
#define FD_DESC 8
#define FD_MAX 12
typedef enum {
Froot,
Fdevfd,
Fdesc,
Flink,
Fctty
} fdntype;
struct fdescnode {
struct fdescnode *fd_forw; /* Hash chain */
struct fdescnode *fd_back;
struct vnode *fd_vnode; /* Back ptr to vnode */
fdntype fd_type; /* Type of this node */
unsigned fd_fd; /* Fd to be dup'ed */
char *fd_link; /* Link to fd/n */
int fd_ix; /* filesystem index */
};
#define VFSTOFDESC(mp) ((struct fdescmount *)((mp)->mnt_data))
#define VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data)
extern dev_t devctty;
extern int fdesc_init __P((void));
extern int fdesc_root __P((struct mount *, struct vnode **));
extern int fdesc_allocvp __P((fdntype, int, struct mount *, struct vnode **));
extern vop_t **fdesc_vnodeop_p;
extern struct vfsops fdesc_vfsops;
#endif /* KERNEL */