80 lines
2.9 KiB
Groff
80 lines
2.9 KiB
Groff
.\" $NetBSD: puffs_node.3,v 1.1 2007/01/19 21:10:55 pooka Exp $
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.\"
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.\" Copyright (c) 2007 Antti Kantee. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd January 19, 2007
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.Dt PUFFS_NODE 3
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.Os
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.Sh NAME
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.Nm puffs_node
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.Nd puffs node routines
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.Sh LIBRARY
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.Lb libpuffs
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.Sh SYNOPSIS
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.In puffs.h
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.Ft struct puffs_node *
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.Fn puffs_pn_new "struct puffs_usermount *pu" "void *priv"
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.Ft void
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.Fn puffs_pn_put "struct puffs_node *pn"
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.Ft void *
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.Fo puffs_nodewalk_fn
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.Fa "struct puffs_usermount *pu" "struct puffs_node *pn" "void *arg"
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.Fc
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.Ft void *
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.Fo puffs_pn_nodewalk
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.Fa "struct puffs_usermount *pu" "puffs_nodewalk_fn" "void *arg"
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.Fc
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.Sh DESCRIPTION
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.Em IMPORTANT NOTE!
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This document describes interfaces which are not yet guaranteed to be
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stable.
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In case you update your system sources, please recompile everything
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and fix complation errors.
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If your sources are out-of-sync, incorrect operation may result.
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The interfaces in this document will most likely be hugely simplified
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in later versions or made transparent to the implementation.
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.Pp
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It should especially be noted, that it is yet completely unsure, how
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much of the internals contents of
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.Vt struct puffs_node
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will be exposed to file systems in the end.
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.Pp
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Nodes are allocated and released by using
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.Fn puffs_pn_new
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and
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.Fn puffs_pn_put ,
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respectively.
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The argument
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.Fa priv
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can be used to store file system specific information.
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.Pp
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The list of all nodes in a file system can be traversed by calling
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.Fn puffs_pn_nodewalk .
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This is useful for example in handling the
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.Fn puffs_fs_sync
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callback, when cached data for every node should be flushed to stable
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storage.
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.Sh SEE ALSO
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.Xr puffs 3
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