Ventoy/Unix/ventoy_unix_src/DragonFly/vfs/nullfs/null.h
2020-12-31 21:56:58 +08:00

66 lines
2.5 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. 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.
*
* @(#)null.h 8.3 (Berkeley) 8/20/94
*
* $FreeBSD: src/sys/miscfs/nullfs/null.h,v 1.11.2.3 2001/06/26 04:20:09 bp Exp $
* $DragonFly: src/sys/vfs/nullfs/null.h,v 1.10 2008/09/18 16:08:32 dillon Exp $
*/
struct null_args {
char *target; /* Target of loopback */
struct export_args export; /* Network export information */
};
#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
struct null_mount {
struct mount *nullm_vfs;
struct vnode *nullm_rootvp; /* Reference to root null_node */
struct netexport export;
};
#endif
#ifdef _KERNEL
#define MOUNTTONULLMOUNT(mp) ((struct null_mount *)((mp)->mnt_data))
#ifdef NULLFS_DEBUG
#define NULLFSDEBUG(format, args...) kprintf(format ,## args)
#else
#define NULLFSDEBUG(format, args...)
#endif /* NULLFS_DEBUG */
int nullfs_export(struct mount *mp, int op,
const struct export_args *export);
#endif /* _KERNEL */