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.\" Copyright (c) 1996 Doug Rabson
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.\" $FreeBSD: src/share/man/man9/VFS_MOUNT.9,v 22.214.171.124 2001/12/17 11:30:18 ru Exp $
.\" $DragonFly: src/share/man/man9/VFS_MOUNT.9,v 1.2 2003/06/17 04:37:01 dillon Exp $
.Dd July 24, 1996
.Dt VFS_MOUNT 9
.Nd mount a filesystem
.Fn VFS_MOUNT "struct mount *mp" "char *path" "caddr_t data" "struct nameidata *ndp" "struct proc *p"
Mount a filesystem into the system's namespace.
Its arguments are:
.Bl -tag -width data
.It Ar mp
Structure representing the filesystem.
.It Ar path
Pathname where the filesystem is being mounted.
.It Ar data
Filesystem specific data. This should be read into the kernel using
.Xr copyin 9 .
.It Ar ndp
Contains the result of a
.Xr namei 9
call on the pathname of the mountpoint.
.It Ar p
Process which is mounting the filesystem.
This is called both to mount new filesystems and to change the
attributes of an existing filesystem. If the
flag is set in
then the filesystem should update its internal state from the value of
.Fa mp->mnt_flag .
This can be used, for instance, to convert a read-only filesystem to
It is also used by
.Xr mountd 8
to update the NFS export information for the filesystem.
flag is not specified, then this is a newly mounted filesystem. The
filesystem code should allocate and initialize
any private data needed to represent
the filesystem (it can use the
field to store this information).
.Sh SEE ALSO
.Xr VFS 9 ,
.Xr vnode 9
This man page was written by
.An Doug Rabson .