90 lines
2.9 KiB
Groff
90 lines
2.9 KiB
Groff
.\" -*- nroff -*-
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.\"
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.\" Copyright (c) 1996 Doug Rabson
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.\"
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.\" All rights reserved.
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.\"
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.\" This program is free software.
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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 DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd July 24, 1996
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.Os
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.Dt VFS_MOUNT 9
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.Sh NAME
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.Nm VFS_MOUNT
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.Nd mount a file system
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.Sh SYNOPSIS
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.In sys/param.h
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.In sys/mount.h
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.In sys/vnode.h
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.Ft int
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.Fn VFS_MOUNT "struct mount *mp" "char *path" "caddr_t data" "struct nameidata *ndp" "struct thread *td"
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.Sh DESCRIPTION
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Mount a file system into the system's namespace.
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.Pp
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Its arguments are:
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.Bl -tag -width data
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.It Ar mp
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Structure representing the file system.
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.It Ar path
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Pathname where the file system is being mounted.
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.It Ar data
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File system specific data. This should be read into the kernel using
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.Xr copyin 9 .
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.It Ar ndp
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Contains the result of a
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.Xr namei 9
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call on the pathname of the mountpoint.
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.It Ar td
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Thread which is mounting the file system.
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.El
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.Pp
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This is called both to mount new file systems and to change the
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attributes of an existing file system. If the
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.Dv MNT_UPDATE
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flag is set in
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.Fa mp->mnt_flag
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then the file system should update its internal state from the value of
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.Fa mp->mnt_flag .
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This can be used, for instance, to convert a read-only file system to
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read-write.
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It is also used by
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.Xr mountd 8
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to update the NFS export information for the file system.
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.Pp
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If the
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.Dv MNT_UPDATE
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flag is not specified, then this is a newly mounted file system. The
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file system code should allocate and initialize
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any private data needed to represent
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the file system (it can use the
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.Fa mp->mnt_data
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field to store this information).
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.Sh SEE ALSO
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.Xr VFS 9 ,
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.Xr vnode 9
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.Sh AUTHORS
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This man page was written by
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.An Doug Rabson .
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