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NetBSD/sys/miscfs/genfs/layer_extern.h

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Introduce layer library in genfs. This set of files abstracts most of the functionality of nullfs. The latter is now just a mount & unmount routine, and a few tables. umapfs borrow most of this infrastructure. Both fs's are now nfs-exportable. All layered fs's share a common format to private mount & private vnode structs (which a particular fs can extend). Also add genfs_noerr_rele(), a vnode op which will vrele/vput operand vnodes appropriately.
1999-07-08 05:18:59 +04:00
/* $NetBSD: layer_extern.h,v 1.1 1999/07/08 01:19:00 wrstuden Exp $ */
/*
* Copyright (c) 1999 National Aeronautics & Space Administration
* All rights reserved.
*
* This software was written by William Studenmund of the
* Numerical Aerospace Similation Facility, NASA Ames Research Center.
*
* 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 the name of the National Aeronautics & Space Administration
* 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 NATIONAL AERONAUTICS & SPACE ADMINISTRATION
* ``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 ADMINISTRATION OR CONTRIB-
* UTORS 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.
*/
/*
* Copyright (c) 1992, 1993, 1995
* 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.
*
*/
/*
* Routines defined by layerfs
*/
/* misc routines in layer_subr.c */
void layerfs_init __P((void));
int layer_node_alloc __P((struct mount *, struct vnode *, struct vnode **));
int layer_node_create __P((struct mount *, struct vnode *, struct vnode **));
struct vnode *
layer_node_find __P((struct mount *, struct vnode *));
#define LOG2_SIZEVNODE 7 /* log2(sizeof struct vnode) */
#define LAYER_NHASH(lmp, vp) \
(&((lmp)->layerm_node_hashtbl[(((u_long)vp)>>LOG2_SIZEVNODE) & \
(lmp)->layerm_node_hash]))
/* vfs routines */
int layerfs_start __P((struct mount *, int, struct proc *));
int layerfs_root __P((struct mount *, struct vnode **));
int layerfs_quotactl __P((struct mount *, int, uid_t, caddr_t,
struct proc *));
int layerfs_statfs __P((struct mount *, struct statfs *, struct proc *));
int layerfs_sync __P((struct mount *, int, struct ucred *, struct proc *));
int layerfs_vget __P((struct mount *, ino_t, struct vnode **));
int layerfs_fhtovp __P((struct mount *, struct fid *, struct vnode **));
int layerfs_checkexp __P((struct mount *, struct mbuf *, int *,
struct ucred **));
int layerfs_vptofh __P((struct vnode *, struct fid *));
int layerfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t,
struct proc *));
/* VOP routines */
int layer_bypass __P((void *));
int layer_getattr __P((void *));
int layer_inactive __P((void *));
int layer_reclaim __P((void *));
int layer_print __P((void *));
int layer_strategy __P((void *));
int layer_bwrite __P((void *));
int layer_bmap __P((void *));
int layer_lock __P((void *));
int layer_unlock __P((void *));
int layer_islocked __P((void *));
int layer_fsync __P((void *));
int layer_lookup __P((void *));
int layer_setattr __P((void *));
int layer_access __P((void *));
int layer_open __P((void *));