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/*-
* 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.
* 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
*
* $FreeBSD: release/9.1.0/sys/fs/fdescfs/fdesc.h 191990 2009-05-11 15:33:26Z attilio $
*/
#ifdef _KERNEL
/* Private mount flags for fdescfs. */
#define FMNT_UNMOUNTF 0x01
struct fdescmount {
struct vnode *f_root; /* Root node */
int flags;
};
#define FD_ROOT 1
#define FD_DESC 3
typedef enum {
Froot,
Fdesc
} fdntype;
struct fdescnode {
LIST_ENTRY(fdescnode) fd_hash; /* Hash list */
struct vnode *fd_vnode; /* Back ptr to vnode */
fdntype fd_type; /* Type of this node */
unsigned fd_fd; /* Fd to be dup'ed */
int fd_ix; /* filesystem index */
};
extern struct mtx fdesc_hashmtx;
#define VFSTOFDESC(mp) ((struct fdescmount *)((mp)->mnt_data))
#define VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data)
extern vfs_init_t fdesc_init;
extern vfs_uninit_t fdesc_uninit;
extern int fdesc_allocvp(fdntype, unsigned, int, struct mount *,
struct vnode **);
#endif /* _KERNEL */