1.\" Copyright (c) 2014 Microsoft Corp. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.Dd October 27, 2014 27.Dt HV_KVP_DAEMON 8 28.Os 29.Sh NAME 30.Nm hv_kvp_daemon 31.Nd Hyper-V Key Value Pair Daemon 32.Sh SYNOPSIS 33.Nm 34.Op Fl dn 35.Sh DESCRIPTION 36The 37.Nm 38daemon provides the ability to store, retrieve, modify and delete 39Key Value pairs for 40.Fx 41guest partitions running on Hyper-V. 42.Pp 43Hyper-V allows administrators to store custom metadata in the form 44of Key Value pairs inside the 45.Fx 46guest partition. 47Administrators can 48use Windows Powershell scripts to add, read, modify and delete such 49Key Value pairs. 50.Pp 51The 52.Nm 53accepts Key Value pair management requests from the 54.Xr hv_utils 4 55driver and performs the actual metadata management on the file-system. 56.Pp 57The same daemon and driver combination is also used to set and get 58IP addresses from a 59.Fx 60guest. 61.Pp 62The set functionality is particularly 63useful when the 64.Fx 65guest is assigned a static IP address and is failed 66over from one Hyper-V host to another. 67After failover, Hyper-V uses the set IP 68functionality to automatically 69update the 70.Fx 71guest's IP address to its original static value. 72.Pp 73On the other hand, the get IP functionality is used to update the guest IP 74address in the Hyper-V management console window. 75.Pp 76The options are as follows: 77.Bl -tag -width indent 78.It Fl d 79Run as regular process instead of a daemon for debugging purpose. 80.It Fl n 81Generate debugging output. 82.El 83.Sh SEE ALSO 84.Xr hv_vmbus 4 , 85.Xr hv_utils 4 , 86.Xr hv_netvsc 4 , 87.Xr hv_storvsc 4 , 88.Xr hv_ata_pci_disengage 4 , 89.Xr hv_kvp 4 90.Sh HISTORY 91Support for Hyper-V in the form of ports was first released in September 2013. 92The daemon was developed through a joint effort between Citrix Inc., 93Microsoft Corp. and Network Appliance Inc.. 94.Sh AUTHORS 95.An -nosplit 96.Fx 97support for 98.Nm 99was first added by 100.An Microsoft BSD Integration Services Team Aq Mt bsdic@microsoft.com . 101