106 lines
3.1 KiB
Groff
106 lines
3.1 KiB
Groff
.\" $NetBSD: xennet.4,v 1.1 2011/01/11 00:45:04 jym Exp $
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.\"
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.\" Copyright (c) 2011 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Jean-Yves Migeon <jym@NetBSD.org>.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd January 8, 2011
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.Dt XENNET 4 xen
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.Os
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.Sh NAME
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.Nm xennet
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.Nd Xen frontend paravirtualized network interface
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.Sh SYNOPSIS
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.Cd "xennet* at xenbus?"
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.Sh DESCRIPTION
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The
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.Nm
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interface forms the frontend part of the paravirtualized drivers
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used by
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.Tn Xen
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guest domains to have network connectivity.
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.Pp
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When the host domain is
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.Nx ,
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the endpoint of the
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.Nm
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interface is a
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.Xr xvif 4
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interface.
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In the XenStore,
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.Nm xvif
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and
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.Nm xennet
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are identified by
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.Dq vif
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(virtual interface)
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entries.
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.Pp
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Conceptually, frontends and backends drivers are
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similar to two Ethernet cards connected via a crossover cable.
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "xennet%d: can't read mac address, err %d"
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The MAC address for this interface could not be read from XenStore.
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.It "xennet%d: %s is not a valid mac address"
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The MAC address specified in the configuration file of the newly
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created guest domain is invalid.
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.It "xennet%d: using event channel %d"
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The
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.Tn Xen
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event channel (virtual interrupt) ID
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associated to this
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.Nm .
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.It "xennet%d: using RX copy mode"
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The
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.Nm
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and its associated endpoint use copy mode for communication: packets
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are copied from one domain's memory to another.
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.It "xennet%d: using RX flip mode"
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The
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.Nm
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and its associated endpoint use flip mode for communication: packets
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are passed by remapping memory pages between domains.
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.El
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.Sh SEE ALSO
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.Xr ifmedia 4 ,
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.Xr xenbus 4 ,
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.Xr xvif 4 ,
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.Xr ifconfig 8
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Nx 3.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Manuel Bouyer Aq bouyer@NetBSD.org
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and
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.An Christian Limpach Aq chris@pin.lu .
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