virtio_scsi (4)

Leading comments

Copyright (c) 2012 Bryan Venteicher
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or o...

(The comments found at the beginning of the groff file "man4/virtio_scsi.4freebsd".)

NAME

virtio_scsi - VirtIO SCSI driver

SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file:

device virtio_scsi

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:

virtio_scsi_load="YES"

DESCRIPTION

The ifconfig device driver provides support for VirtIO SCSI devices.

LOADER TUNABLES

Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf5.

hw.vtscsi.bus_reset_disable

In the initial QEMU release with VirtIO SCSI support, in-flight operations were not aborted when stopping the device, rendering bus reset ineffective. This tunable disables attempts to issue reset bus commands. The default value is 1.

DEBUGGING

To enable debugging prints from the ifconfig driver, set the

hw.vtscsi.X.debug_level

variable, where X is the adapter number, either in loader.conf5 or via sysctl(8). The following bits have the described effects:

0x01

Enable informational prints.

0x02

Enable prints for driver errors.

0x04

Enable tracing prints.

SEE ALSO

virtio(4)

HISTORY

The ifconfig driver was written by An Bryan Venteicher Aq bryanv@FreeBSD.org . It first appeared in Fx 10.0 .