freebsd-dev/share/man/man9/VFS_MOUNT.9
Hiten Pandya 0640e9e01b Some mdoc(7) fixes:
Nuke incorrect usage of .Ar; replace it with .Vt, .Va or .Fa appropriately.
The .Ar mdoc(7) specifier should only be used when displaying command line
arguments.

Approved by:	des (mentor)
2003-05-31 14:07:25 +00:00

90 lines
2.9 KiB
Groff

.\" -*- nroff -*-
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.\" Copyright (c) 1996 Doug Rabson
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.\" $FreeBSD$
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.Dd July 24, 1996
.Os
.Dt VFS_MOUNT 9
.Sh NAME
.Nm VFS_MOUNT
.Nd mount a file system
.Sh SYNOPSIS
.In sys/param.h
.In sys/mount.h
.In sys/vnode.h
.Ft int
.Fn VFS_MOUNT "struct mount *mp" "char *path" "caddr_t data" "struct nameidata *ndp" "struct thread *td"
.Sh DESCRIPTION
Mount a file system into the system's namespace.
.Pp
Its arguments are:
.Bl -tag -width data
.It Fa mp
Structure representing the file system.
.It Fa path
Pathname where the file system is being mounted.
.It Fa data
File system specific data. This should be read into the kernel using
.Xr copyin 9 .
.It Fa ndp
Contains the result of a
.Xr namei 9
call on the pathname of the mountpoint.
.It Fa td
Thread which is mounting the file system.
.El
.Pp
This is called both to mount new file systems and to change the
attributes of an existing file system. If the
.Dv MNT_UPDATE
flag is set in
.Fa mp->mnt_flag
then the file system should update its internal state from the value of
.Fa mp->mnt_flag .
This can be used, for instance, to convert a read-only file system to
read-write.
It is also used by
.Xr mountd 8
to update the NFS export information for the file system.
.Pp
If the
.Dv MNT_UPDATE
flag is not specified, then this is a newly mounted file system. The
file system code should allocate and initialize
any private data needed to represent
the file system (it can use the
.Fa mp->mnt_data
field to store this information).
.Sh SEE ALSO
.Xr VFS 9 ,
.Xr vnode 9
.Sh AUTHORS
This man page was written by
.An Doug Rabson .