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+.\" $FreeBSD$
+.\"
+.\" Copyright (c) 2012 Microsoft Corp.
+.\" 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 other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.Dd September 10, 2013
+.Dt HYPER-V 4
+.Os
+.Sh NAME
+.Nm hv_kvp_daemon
+.Nd Hyper-V Key Value Pair Daemon
+.Sh SYNOPSIS
+To compile this driver into the kernel, place the following lines in
+the system kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device hyperv"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm
+daemon provides the ability to store, retrieve, modify and delete
+Key Value pairs for
+.Fx
+guest partitions running on Hyper-V.
+Hyper-V allows administrators to store custom metadata in the form
+of Key Value pairs inside the
+.Fx
+guest partition.
+Administrators can use Windows Powershell scripts to add, read, modify
+and delete such Key Value pairs.
+.Pp
+The
+.Nm
+accepts Key Value pair management requests from the
+.Xr hv_kvp 4
+driver and performs the actual metadata management on the file-system.
+.Pp
+The same daemon and driver combination is also used to set and get
+IP addresses from a
+.Fx
+guest.
+.Pp
+The set functionality is particularly
+useful when the
+.Fx
+guest is assigned a static IP address and is failed
+over from one Hyper-V host to another.
+After failover, Hyper-V uses the set IP functionality to automatically
+update the
+.Fx
+guest's IP address to its original static value.
+.Pp
+On the other hand, the get IP functionality is used to update the guest IP
+address in the Hyper-V management console window.
+.Sh SEE ALSO
+.Xr hv_vmbus 4 ,
+.Xr hv_utils 4 ,
+.Xr hv_netvsc 4 ,
+.Xr hv_storvsc 4 ,
+.Xr hv_ata_pci_disengage 4 ,
+.Xr hv_kvp 4
+.Sh HISTORY
+Support for
+.Nm
+first appeared in
+.Fx 10.0 .
+The daemon was developed through a joint effort between Citrix Incorporated,
+Microsoft Corporation, and Network Appliance Incorporated.
+.Sh AUTHORS
+.An -nosplit
+.Fx
+support for
+.Nm
+was first added by
+.An Microsoft BSD Integration Services Team Aq bsdic@microsoft.com .