.\"
.\" Copyright (c) 2014 Hans Petter Selasky
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.\" $FreeBSD: releng/12.2/share/man/man4/usfs.4 333719 2018-05-17 15:21:19Z trasz $
.\"
.Dd May 17, 2018
.Dt USFS 4
.Os
.Sh NAME
.Nm usfs
.Nd USB device side support for bulk only transport mass storage
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following lines in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device usb"
.Cd "device usfs"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
usfs_load="YES"
.Ed
.Sh DESCRIPTION
.Bf -symbolic
This driver is obsolete.
Users are advised to use
.Xr cfumass 4
instead.
.Ef
.Pp
The
.Nm
driver provides support for emulating an USB mass storage device when
the USB stack is activated in USB device side mode (the
.Xr usb_template 4
module is loaded and the
.Va hw.usb.template
sysctl is set to 0).
.Pp
Upon attach the driver creates a RAM disk which can be read and written.
.Sh SEE ALSO
.Xr cfumass 4 ,
.Xr umass 4 ,
.Xr usb 4 ,
.Xr usb_template 4
.Sh HISTORY
The
.Nm
driver appeared in
.Fx 8.0 .