From a23ad958765274a36b09674c00c14b1259b0ca8a8846088246daeaea61d8f1ae Mon Sep 17 00:00:00 2001
From: Olaf Hering <ohering@suse.com>
Date: Tue, 7 Jan 2025 15:01:01 +0000
Subject: [PATCH] - update route parsing in kvp daemon - reduce resource usage
 in hv_kvp_daemon (175c71c2) - reduce resouce usage in hv_get_dns_info helper
 (a4d024fe) - hv_kvp_daemon: Pass NIC name to hv_get_dns_info as well
 (07dfa6e8) - terminate fcopy daemon if read from uio fails (a9640fcd) -
 change permissions of NetworkManager configuration file (91ae69c7) - Fix a
 complier warning in the fcopy uio daemon (cb1b78f1) - remove obsolete
 kvptest.ps1.txt which failed since a decade - remove obsolete rpm postinstall
 code for SLE11SP2

OBS-URL: https://build.opensuse.org/package/show/Virtualization/hyper-v?expand=0&rev=162
---
 .gitattributes                         |   23 +
 .gitignore                             |    1 +
 hyper-v.changes                        |  553 +++++++
 hyper-v.compare-with-upstream.sh       |    6 +
 hyper-v.include.linux.hyperv.h         |  411 +++++
 hyper-v.kvp.gethostname.patch          |  149 ++
 hyper-v.kvptest.ps1.txt                |   49 +
 hyper-v.lsvmbus.py                     |  112 ++
 hyper-v.spec                           |  269 ++++
 hyper-v.tools.hv.hv_fcopy_daemon.c     |  266 ++++
 hyper-v.tools.hv.hv_fcopy_uio_daemon.c |  497 ++++++
 hyper-v.tools.hv.hv_get_dhcp_info.sh   |   28 +
 hyper-v.tools.hv.hv_get_dns_info.sh    |   17 +
 hyper-v.tools.hv.hv_kvp_daemon.c       | 1947 ++++++++++++++++++++++++
 hyper-v.tools.hv.hv_set_ifconfig.sh    |  247 +++
 hyper-v.tools.hv.hv_vss_daemon.c       |  355 +++++
 hyper-v.tools.hv.vmbus_bufring.c       |  318 ++++
 hyper-v.tools.hv.vmbus_bufring.h       |  158 ++
 18 files changed, 5406 insertions(+)
 create mode 100644 .gitattributes
 create mode 100644 .gitignore
 create mode 100644 hyper-v.changes
 create mode 100644 hyper-v.compare-with-upstream.sh
 create mode 100644 hyper-v.include.linux.hyperv.h
 create mode 100644 hyper-v.kvp.gethostname.patch
 create mode 100644 hyper-v.kvptest.ps1.txt
 create mode 100644 hyper-v.lsvmbus.py
 create mode 100644 hyper-v.spec
 create mode 100644 hyper-v.tools.hv.hv_fcopy_daemon.c
 create mode 100644 hyper-v.tools.hv.hv_fcopy_uio_daemon.c
 create mode 100644 hyper-v.tools.hv.hv_get_dhcp_info.sh
 create mode 100644 hyper-v.tools.hv.hv_get_dns_info.sh
 create mode 100644 hyper-v.tools.hv.hv_kvp_daemon.c
 create mode 100644 hyper-v.tools.hv.hv_set_ifconfig.sh
 create mode 100644 hyper-v.tools.hv.hv_vss_daemon.c
 create mode 100644 hyper-v.tools.hv.vmbus_bufring.c
 create mode 100644 hyper-v.tools.hv.vmbus_bufring.h

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..9b03811
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,23 @@
+## Default LFS
+*.7z filter=lfs diff=lfs merge=lfs -text
+*.bsp filter=lfs diff=lfs merge=lfs -text
+*.bz2 filter=lfs diff=lfs merge=lfs -text
+*.gem filter=lfs diff=lfs merge=lfs -text
+*.gz filter=lfs diff=lfs merge=lfs -text
+*.jar filter=lfs diff=lfs merge=lfs -text
+*.lz filter=lfs diff=lfs merge=lfs -text
+*.lzma filter=lfs diff=lfs merge=lfs -text
+*.obscpio filter=lfs diff=lfs merge=lfs -text
+*.oxt filter=lfs diff=lfs merge=lfs -text
+*.pdf filter=lfs diff=lfs merge=lfs -text
+*.png filter=lfs diff=lfs merge=lfs -text
+*.rpm filter=lfs diff=lfs merge=lfs -text
+*.tbz filter=lfs diff=lfs merge=lfs -text
+*.tbz2 filter=lfs diff=lfs merge=lfs -text
+*.tgz filter=lfs diff=lfs merge=lfs -text
+*.ttf filter=lfs diff=lfs merge=lfs -text
+*.txz filter=lfs diff=lfs merge=lfs -text
+*.whl filter=lfs diff=lfs merge=lfs -text
+*.xz filter=lfs diff=lfs merge=lfs -text
+*.zip filter=lfs diff=lfs merge=lfs -text
+*.zst filter=lfs diff=lfs merge=lfs -text
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..57affb6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.osc
diff --git a/hyper-v.changes b/hyper-v.changes
new file mode 100644
index 0000000..2488990
--- /dev/null
+++ b/hyper-v.changes
@@ -0,0 +1,553 @@
+-------------------------------------------------------------------
+Wed Jan  1 01:01:01 UTC 2025 - ohering@suse.de
+
+- update route parsing in kvp daemon
+- reduce resource usage in hv_kvp_daemon (175c71c2)
+- reduce resouce usage in hv_get_dns_info helper (a4d024fe)
+- hv_kvp_daemon: Pass NIC name to hv_get_dns_info as well (07dfa6e8)
+- terminate fcopy daemon if read from uio fails (a9640fcd)
+- change permissions of NetworkManager configuration file (91ae69c7)
+- Fix a complier warning in the fcopy uio daemon (cb1b78f1)
+- remove obsolete kvptest.ps1.txt which failed since a decade
+- remove obsolete rpm postinstall code for SLE11SP2
+
+-------------------------------------------------------------------
+Tue Oct 22 22:22:22 UTC 2024 - ohering@suse.de
+
+- Add memory allocation check in hv_fcopy_start (94e86b17)
+- suppress the invalid warning for packed member alignment (207e03b0)
+- Add new fcopy application based on uio driver (82b0945c)
+- Add vmbus_bufring (45bab4d7)
+- kvp: Handle IPv4 and Ipv6 combination for keyfile format (f971f6dd)
+- kvp: Some small fixes for handling NM keyfiles (c3803203)
+- kvp: Support for keyfile based connection profile (42999c90)
+- kvp: remove unnecessary (void*) conversions (22589542)
+- Remove an extraneous "the" (f15f39fa)
+- change http to https in hv_kvp_daemon.c (fa52a4b2)
+- replace the copy of include/linux/hyperv.h with include/uapi/linux/hyperv.h (6de74d10)
+- merge individual udev rules files into a single rules file
+- package only files, not directories already owned by filesystem.rpm
+- remove braces from rpm spec macros
+- remove obsolete Group tag
+- replace RPM_BUILD_ROOT with buildroot
+- use a meaningful name for the UAPI include file
+- use a meaningful variable name for ifcfg in hv_set_ifconfig.sh
+
+-------------------------------------------------------------------
+Tue Apr 23 10:01:10 UTC 2024 - pgajdos@suse.com
+
+- remove dependency on /usr/bin/python3 using
+  %python3_fix_shebang macro, [bsc#1212476]
+
+-------------------------------------------------------------------
+Thu Feb 22 07:56:09 UTC 2024 - Dominique Leuenberger <dimstar@opensuse.org>
+
+- Use %patch -P N instead of deprecated %patchN.
+
+-------------------------------------------------------------------
+Thu Aug 20 12:12:12 UTC 2020 - ohering@suse.de
+
+- Allow daemon restart again (bsc#1116957)
+  Since some time the kernel moved from netlink sockets to char
+  devices, which is supposed to handle a connection reopen for the
+  kernel<->daemon interface
+
+-------------------------------------------------------------------
+Wed Jul 22 12:12:12 UTC 2020 - ohering@suse.de
+
+- Remove dependency to network-online.target now that gethostname
+  is used in kvp_daemon (bsc#1174443, bsc#1174444)
+- Reopen the devices if read() or write() returns errors (9fc3c01a)
+- Use either python2 or python3 for lsvmbus (bsc#1093910)
+- Remove sysv init scripts
+
+-------------------------------------------------------------------
+Wed Jul 22 09:12:44 UTC 2020 - Guillaume GARDET <guillaume.gardet@opensuse.org>
+
+- Enable build on aarch64
+
+-------------------------------------------------------------------
+Thu Feb 20 16:16:16 UTC 2020 - ohering@suse.de
+
+- Revert previous non-upstream change for async name resolution
+  Just use gethostname via hyper-v.kvp.gethostname.patch (bsc#1100758)
+
+-------------------------------------------------------------------
+Fri Nov 29 16:41:25 UTC 2019 - ohering@suse.de
+
+- Update lsvmbus interpreter from python(1) to python3(1) again
+  because only SLE12 lacked proper python3 support (bsc#1093910)
+
+-------------------------------------------------------------------
+Wed Nov 27 09:08:07 UTC 2019 - ohering@suse.de
+
+- async name resolution in kvp_daemon (bsc#1100758)
+- kvp: eliminate 'may be used uninitialized' warning (89eb4d8d)
+- fix typos in toolchain (2d35c660)
+- fixed Python pep8/flake8 warnings for lsvmbus (5912e791)
+- Replace GPLv2 boilerplate/reference with SPDX (43aa3132)
+- Fix a warning of buffer overflow with gcc 8.0.1 (4fcba780)
+
+-------------------------------------------------------------------
+Tue Oct  9 09:27:45 UTC 2018 - ohering@suse.de
+
+- fcopy: set 'error' in case an unknown operation was requested (c2d68afb)
+
+-------------------------------------------------------------------
+Mon Oct  8 06:48:04 UTC 2018 - ohering@suse.de
+
+- Update lsvmbus interpreter from python3(1) to python(1)
+  because SLE12 lacks python3 support (bsc#1093910)
+
+-------------------------------------------------------------------
+Tue Sep 25 08:33:36 UTC 2018 - ohering@suse.de
+
+- vss: fix loop device detection (07136793)
+- Fix IP reporting by KVP daemon with SRIOV (4ba63412)
+- Fix a bug in the key delete code (86503bd3)
+- fix compiler warnings about major/target_fname (1330fc35)
+- PRIVATE hyper-v.compare-with-upstream.sh
+
+-------------------------------------------------------------------
+Thu Aug  2 08:46:52 UTC 2018 - schwab@suse.de
+
+- hyper-v.tools.hv.hv_vss_daemon.c: Include <sys/sysmacros.h> for major
+
+-------------------------------------------------------------------
+Tue May 22 06:56:57 UTC 2018 - ohering@suse.de
+
+- Update lsvmbus interpreter from env(1) to python3(1) (bsc#1093910)
+
+-------------------------------------------------------------------
+Mon Jan  8 10:45:35 UTC 2018 - ohering@suse.de
+
+- update buffer handling in hv_fcopy_daemon
+- remove unnecessary header files and netlink related code
+- Avoid reading past allocated blocks from KVP file (bnc#1087658)
+- fix snprintf warning in kvp_daemon
+- properly handle long paths
+- kvp: configurable external scripts path
+- vss: Thaw the filesystem and continue if freeze call has timed out
+- vss: Skip freezing filesystems backed by loop
+
+-------------------------------------------------------------------
+Wed Jun 28 12:04:38 UTC 2017 - ohering@suse.de
+
+- Check VSS daemon is listening before a hot backup (bnc#1029693)
+- fix a compile warning in snprintf
+- kvp: ensure kvp device fd is closed on exec
+- lsvmbus: add pci pass-through UUID
+
+-------------------------------------------------------------------
+Wed May  4 13:29:54 UTC 2016 - ohering@suse.de
+
+- add Conflicts with kernel < 4.2 (fate#320485)
+- vss: fix the write()'s argument: error -> vss_msg
+- remove repeated HV_FCOPY string
+- report ENOSPC errors in hv_fcopy_daemon
+- fcopy: full handshake support
+- vss: full handshake support
+- vss: use misc char device to communicate with kernel
+- kvp: use misc char device to communicate with kernel
+
+-------------------------------------------------------------------
+Fri Sep 18 10:11:01 UTC 2015 - ohering@suse.de
+
+- add a python script lsvmbus to list VMBus devices (fate#315887)
+
+-------------------------------------------------------------------
+Thu Apr 30 11:25:47 UTC 2015 - ohering@suse.de
+
+- hv: hypervvssd: call endmntent before call setmntent again 
+- remove unused bytes_written from kvp_update_file()
+- address compiler warnings for hv_kvp_daemon.c
+- kvp_daemon: make IPv6-only-injection work
+- address compiler warnings for hv_fcopy_daemon.c
+- do not add redundant '/' in hv_start_fcopy()
+
+-------------------------------------------------------------------
+Thu Apr 16 15:23:18 UTC 2015 - ohering@suse.de
+
+- Add runlevel script for fcopy daemon in SLE11 (bnc#926534)
+
+-------------------------------------------------------------------
+Mon Jan 12 09:37:40 UTC 2015 - ohering@suse.de
+
+- Check return value of setsockopt call
+- Improve error logging in VSS daemon.
+- Check return value of poll call
+- Properly pack the data for file copy functionality
+- make struct hv_do_fcopy match Hyper-V host messages
+
+-------------------------------------------------------------------
+Wed Dec 17 09:06:33 UTC 2014 - ohering@suse.de
+
+- Start hv_kvp_daemon after network-online.target (bnc#910353)
+- ignore ENOBUFS and ENOMEM in the KVP daemon
+- vssdaemon: skip all filesystems mounted readonly (bnc#909864)
+- vssdaemon: report freeze errors
+
+-------------------------------------------------------------------
+Tue Nov 25 17:46:30 UTC 2014 - ohering@suse.de
+
+- introduce -n/--no-daemon option (fate#317533)
+
+-------------------------------------------------------------------
+Sun Nov 09 04:39:00 UTC 2014 - Led <ledest@gmail.com>
+
+- fix bashisms in pre/post scripts
+
+-------------------------------------------------------------------
+Tue Sep 30 15:41:02 UTC 2014 - ohering@suse.de
+
+- vssdaemon: ignore the EBUSY on multiple freezing the same
+  partition (bnc#899204)
+
+-------------------------------------------------------------------
+Tue Jul  1 17:32:30 CEST 2014 - ohering@suse.de
+
+- fix file overwriting of hv_fcopy_daemon
+
+-------------------------------------------------------------------
+Mon May 26 15:50:21 CEST 2014 - ohering@suse.de
+
+- copy mask2pfxlen from /etc/sysconfig/network/scripts/functions
+  to hv_set_ifconfig (bnc#879256)
+
+-------------------------------------------------------------------
+Wed May 21 12:05:31 CEST 2014 - ohering@suse.de
+
+- Start hyper-v helpers manually with helper script in inst-sys
+
+-------------------------------------------------------------------
+Thu Apr 10 19:19:04 CEST 2014 - ohering@suse.de
+
+- Handle the case when the target file exists correctly in hv_fcopy_daemon
+- vssdaemon: Ignore VFAT mounts during the Freeze operation
+
+-------------------------------------------------------------------
+Sun Mar  2 18:11:31 CET 2014 - ohering@suse.de
+
+- Package /usr/lib/udev to fix build error
+
+-------------------------------------------------------------------
+Wed Feb 12 10:32:54 CET 2014 - ohering@suse.de
+
+- Update hv_fcopy_daemon, kernel name changed to /dev/vmbus/hv_fcopy
+
+-------------------------------------------------------------------
+Thu Jan 23 17:00:54 CET 2014 - ohering@suse.de
+
+- Start daemons on demand via udev rules because the guest services
+  are optional.
+- If systemd is used daemons live in libdir, they are not usercallable apps
+
+-------------------------------------------------------------------
+Thu Jan 16 11:09:34 CET 2014 - ohering@suse.de
+
+- Add hv_fcopy_daemon for post 13.1 releases (fate#315887)
+  hyper-v.tools.hv.hv_fcopy_daemon.c
+
+-------------------------------------------------------------------
+Wed Dec 18 14:46:37 CET 2013 - ohering@suse.de
+
+- Use native systemd services for post 13.1 releases
+
+-------------------------------------------------------------------
+Sun Sep  8 10:36:29 CEST 2013 - ohering@suse.de
+
+- Update Supplements: modalias(dmi:*)
+
+-------------------------------------------------------------------
+Mon Aug 12 16:56:08 CEST 2013 - ohering@suse.de
+
+- Skip restart_on_update with old hyper-v.rpms while old
+  kernel is running (bnc#770763)
+
+-------------------------------------------------------------------
+Wed Aug  7 19:04:35 CEST 2013 - ohering@suse.de
+
+- cache FQDN in kvp_daemon to avoid timeouts (bnc#828714)
+- use full nlmsghdr in netlink_send
+- correct payload size in netlink_send
+- use single send+recv buffer
+- log errors to syslog in kvp_set_ip_info
+- check return value of system in hv_kvp_daemon
+- in kvp_set_ip_info free mac_addr right after usage
+- check return value of daemon to fix compiler warning.
+
+-------------------------------------------------------------------
+Thu Aug  1 14:21:57 CEST 2013 - ohering@suse.de
+
+- Fix send/recv buffer allocation (bnc#828714)
+
+-------------------------------------------------------------------
+Wed Jul 24 10:18:34 CEST 2013 - ohering@suse.de
+
+- set BOOTPROTO=static if any IPADDR/IP6ADDR was passed to 
+  hv_set_ifconfig and dhcp is disabled
+
+-------------------------------------------------------------------
+Mon Jul 15 16:16:06 CEST 2013 - ohering@suse.de
+
+- update hv_kvp_daemon (merge 0783d72fa from v3.9-rc1)
+  Fix how ifcfg-* file is created
+
+-------------------------------------------------------------------
+Mon Jul 15 15:24:00 CEST 2013 - ohering@suse.de
+
+- update hv_kvp_daemon (changes up to 3.11-rc1):
+  Improve error logging in KVP daemon.
+  Fix file descriptor leaks
+  Check retrun value of strchr call
+  Check return value of poll call
+  Check return value of setsockopt call
+  daemon should check type of received Netlink msg
+  daemon setsockopt should use options macros
+  daemon should subscribe only to CN_KVP_IDX group
+
+-------------------------------------------------------------------
+Mon Jul 15 12:04:05 CEST 2013 - ohering@suse.de
+
+- Fix a bug in IPV6 subnet enumeration (bnc#828714)
+
+-------------------------------------------------------------------
+Tue Mar 26 18:03:47 CET 2013 - ohering@suse.de
+
+- Update hv_vss_daemon (bnc#811033)
+
+-------------------------------------------------------------------
+Fri Mar 22 17:23:36 CET 2013 - ohering@suse.de
+
+- add hv_vss_daemon (fate#314921)
+  helper to support host initiated backup
+
+-------------------------------------------------------------------
+Fri Mar 22 16:56:57 CET 2013 - ohering@suse.de
+
+- build hv_kvp_daemon with -D_GNU_SOURCE to get O_CLOEXEC
+
+-------------------------------------------------------------------
+Fri Mar 22 16:19:38 CET 2013 - ohering@suse.de
+
+- update hv_kvp_daemon
+  Use CLOEXEC when opening kvp_pool files
+  Fix permissions of created directory and files
+  Fix /var subdirectory (move state files from /var/opt to /var/lib)
+  Fix string types
+
+-------------------------------------------------------------------
+Tue Nov 27 11:19:32 CET 2012 - ohering@suse.de
+
+- update hv_set_ifconfig, use single index for static ipv4/ipv6 [bnc#790469]
+
+-------------------------------------------------------------------
+Sun Nov 25 17:50:40 CET 2012 - ohering@suse.de
+
+- update hv_set_ifconfig further to work with our ifcfg [bnc#790469]
+
+-------------------------------------------------------------------
+Thu Nov 22 18:14:12 CET 2012 - ohering@suse.de
+
+- update hv_get_dhcp_info to work with our ifcfg [bnc#790469]
+- remove cat usage from hv_get_dns_info
+- add quoting to hv_set_ifconfig to make it more robust
+
+-------------------------------------------------------------------
+Mon Nov 12 17:18:25 CET 2012 - ohering@suse.de
+
+- remove code to build kmp, it was not enabled because the
+  drivers are now in kernel since a long time. [bnc#676890]
+
+-------------------------------------------------------------------
+Thu Nov  8 14:30:05 CET 2012 - ohering@suse.de
+
+- Netlink source address validation allows DoS [bnc#791605, CVE-2012-5532]
+  bugfix for recvfrom check from bnc#761200
+
+-------------------------------------------------------------------
+Fri Oct 26 17:13:40 CEST 2012 - ohering@suse.de
+
+- update hv_set_ifconfig to work with our ifcfg
+
+-------------------------------------------------------------------
+Sat Oct 13 11:40:30 CEST 2012 - ohering@suse.de
+
+- update hv_kvp_daemon
+  Return the full kernel version
+  Don't return loopback addresses
+
+-------------------------------------------------------------------
+Thu Oct  4 15:14:05 CEST 2012 - ohering@suse.de
+
+- bump to version 4
+- update kv_kvp_daemon to 3.7-rc1 state [fate#314441]
+  support KVP IP Injection, helper scripts go to /usr/lib/hyper-v/bin:
+  hv_get_dhcp_info, hv_get_dns_info, hv_set_ifconfig
+- remove usage of absolute paths in runlevel script
+
+-------------------------------------------------------------------
+Tue Sep  4 14:55:38 CEST 2012 - ohering@suse.de
+
+- remove restart_on_update in postun section
+  the daemon can not be restarted at this point, and the new daemon
+  may not be 100 percent compatible with the currently running
+  kernel [bnc#770763]
+
+-------------------------------------------------------------------
+Wed May 16 20:44:36 CEST 2012 - ohering@suse.de
+
+- check origin of netlink messages, use recvfrom() [bnc#761200, CVE-2012-2669]
+
+-------------------------------------------------------------------
+Wed May  2 12:13:03 CEST 2012 - ohering@suse.de
+
+- update insserv part, see comments in OBS submit request #112701
+
+-------------------------------------------------------------------
+Tue Mar 27 08:50:43 CEST 2012 - ohering@suse.de
+
+- add kvptest.ps1.txt to docs, a PowerShell script to verify KVP
+
+-------------------------------------------------------------------
+Mon Mar 26 19:05:48 CEST 2012 - ohering@suse.de
+
+- update hv_kvp_daemon to 3.4-rc1 state
+  use a copy linux/hyperv.h to compile the daemon
+
+-------------------------------------------------------------------
+Thu Dec  8 17:46:21 CET 2011 - ohering@suse.de
+
+- do not package modprobe.conf rule in main package
+  prevents loading of ata_piix which is required for cdrom access
+
+-------------------------------------------------------------------
+Fri Nov 18 21:49:57 CET 2011 - ohering@suse.de
+
+- add Supplements to install package if dmi matches [bnc#731198]
+
+-------------------------------------------------------------------
+Thu Sep  1 18:51:03 CEST 2011 - ohering@suse.de
+
+- disable hyper-v-kmp
+  hv_storvsc handles now IDE and SCSI disks and ata_piix is
+  compiled into the kernel in SLE12, so the modprobe.conf rules
+  have no meaning anymore
+
+-------------------------------------------------------------------
+Tue Jul 26 21:24:25 CEST 2011 - ohering@suse.de
+
+- update hv_kvp_daemon: Cleanup kvp_get_domain_name(). If
+  getaddrinfo() fails, deal with it properly (this can happen if no
+  IP address has been assigned).  Also, don't specify a specific
+  service in the call to getaddrinfo() to make this code as generic
+  as possible.
+
+-------------------------------------------------------------------
+Sun Jul 24 17:22:41 CEST 2011 - ohering@suse.de
+
+- update hv_kvp_daemon: The current win7 host does not like it when
+  we return the complete kernel release information. Conform to
+  what the host expects.
+
+-------------------------------------------------------------------
+Fri Jun 17 15:41:33 CEST 2011 - ohering@suse.de
+
+- update preun, stop_on_removal requires an argument
+
+-------------------------------------------------------------------
+Fri Jun 17 11:09:30 CEST 2011 - ohering@suse.de
+
+- remove get_release_number.sh, which was added by accident
+- bump version number to 2
+
+-------------------------------------------------------------------
+Fri Jun 17 10:58:42 CEST 2011 - ohering@suse.de
+
+- catch errors from daemon()
+
+-------------------------------------------------------------------
+Fri Jun 17 10:33:50 CEST 2011 - ohering@suse.de
+
+- update postun to run restart_on_update
+- use rpmmacro for daemon name
+
+-------------------------------------------------------------------
+Fri Jun 17 08:10:12 CEST 2011 - ohering@suse.de
+
+- update postin to work in / again when running insserv macro
+
+-------------------------------------------------------------------
+Thu Jun 16 15:33:49 CEST 2011 - ohering@suse.de
+
+- Update version number to 1 so kernel.rpm can obsolete
+  the old kmp packages
+
+-------------------------------------------------------------------
+Thu Jun 16 11:12:06 CEST 2011 - ohering@suse.de
+
+- enable hv_kvp_daemon if run in a hv guest [fate#312213]
+
+-------------------------------------------------------------------
+Thu Apr 21 17:18:20 CEST 2011 - ohering@suse.de
+
+- add hv_kvp_daemon to provide system infos to hypervisor [bnc#685189] 
+  this enables the hyper-v main package
+
+-------------------------------------------------------------------
+Sat Apr 16 15:13:36 CEST 2011 - ohering@suse.de
+
+- Require at least kernel-default 2.6.32.27 for an empty KMP.
+
+-------------------------------------------------------------------
+Fri Apr 15 16:50:25 CEST 2011 - ohering@suse.de
+
+- actually keep the KMP packages with just the modprobe.conf file
+
+-------------------------------------------------------------------
+Thu Mar 31 11:24:03 CEST 2011 - ohering@suse.de
+
+- make building of kernel modules optional [bnc#676890]
+  the hv*.ko drivers exist in two places, kernel-default and this
+  KMP package. Both can get out of sync, then mkinitrd will use
+  (the possible outdated) drivers from this KMP package.
+  disable building drivers per default, keep only the
+  hyperv_pvdrivers.conf
+- mark hyperv_pvdrivers.conf as config to preserve local
+  modifications done by the sysadmin
+
+-------------------------------------------------------------------
+Thu Feb 24 12:09:25 CET 2011 - meissner@suse.de
+
+- also add hv_timesource to Modules.supported [bnc#650748]
+
+-------------------------------------------------------------------
+Tue Jan  4 10:28:21 CET 2011 - meissner@suse.de
+
+- add hv_utils to Modules.supported [bnc#650748]
+
+-------------------------------------------------------------------
+Wed Apr 28 11:40:33 CEST 2010 - kukuk@suse.de
+
+- Next update of hyperv_pvdrivers.conf [bnc#600212]
+
+-------------------------------------------------------------------
+Tue Apr 27 13:20:55 CEST 2010 - kukuk@suse.de
+
+- hyperv_pvdrivers.conf: fix syntax error
+
+-------------------------------------------------------------------
+Tue Apr 27 07:10:05 CEST 2010 - ksrinivasan@novell.com
+
+- Update hyperv_pvdrivers.conf config file 
+
+-------------------------------------------------------------------
+Mon Apr 26 18:15:40 CEST 2010 - kukuk@suse.de
+
+- Add hyperv_pvdrivers.conf modprobe config file
+
+-------------------------------------------------------------------
+Fri Mar  5 13:40:56 CET 2010 - mmarek@suse.cz
+
+- Packaged drivers/staging/hv as a standalone KMP (bnc#585651).
+
diff --git a/hyper-v.compare-with-upstream.sh b/hyper-v.compare-with-upstream.sh
new file mode 100644
index 0000000..b3486d6
--- /dev/null
+++ b/hyper-v.compare-with-upstream.sh
@@ -0,0 +1,6 @@
+d=~/work/src/kernel/kerncvs.kernel.master
+diff -u hyper-v.tools.hv.hv_vss_daemon.c ${d}/tools/hv/hv_vss_daemon.c
+diff -u hyper-v.tools.hv.hv_kvp_daemon.c ${d}/tools/hv/hv_kvp_daemon.c
+diff -u hyper-v.tools.hv.hv_fcopy_daemon.c ${d}/tools/hv/hv_fcopy_daemon.c
+diff -u hyper-v.include.linux.hyperv.h ${d}/include/uapi/linux/hyperv.h
+diff -u hyper-v.lsvmbus.py ${d}/tools/hv/lsvmbus
diff --git a/hyper-v.include.linux.hyperv.h b/hyper-v.include.linux.hyperv.h
new file mode 100644
index 0000000..d08235b
--- /dev/null
+++ b/hyper-v.include.linux.hyperv.h
@@ -0,0 +1,411 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ *
+ * Copyright (c) 2011, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ *   Haiyang Zhang <haiyangz@microsoft.com>
+ *   Hank Janssen  <hjanssen@microsoft.com>
+ *   K. Y. Srinivasan <kys@microsoft.com>
+ *
+ */
+
+#ifndef _UAPI_HYPERV_H
+#define _UAPI_HYPERV_H
+
+#include <linux/types.h>
+
+/*
+ * Framework version for util services.
+ */
+#define UTIL_FW_MINOR  0
+
+#define UTIL_WS2K8_FW_MAJOR  1
+#define UTIL_WS2K8_FW_VERSION     (UTIL_WS2K8_FW_MAJOR << 16 | UTIL_FW_MINOR)
+
+#define UTIL_FW_MAJOR  3
+#define UTIL_FW_VERSION     (UTIL_FW_MAJOR << 16 | UTIL_FW_MINOR)
+
+
+/*
+ * Implementation of host controlled snapshot of the guest.
+ */
+
+#define VSS_OP_REGISTER 128
+
+/*
+  Daemon code with full handshake support.
+ */
+#define VSS_OP_REGISTER1 129
+
+enum hv_vss_op {
+	VSS_OP_CREATE = 0,
+	VSS_OP_DELETE,
+	VSS_OP_HOT_BACKUP,
+	VSS_OP_GET_DM_INFO,
+	VSS_OP_BU_COMPLETE,
+	/*
+	 * Following operations are only supported with IC version >= 5.0
+	 */
+	VSS_OP_FREEZE, /* Freeze the file systems in the VM */
+	VSS_OP_THAW, /* Unfreeze the file systems */
+	VSS_OP_AUTO_RECOVER,
+	VSS_OP_COUNT /* Number of operations, must be last */
+};
+
+
+/*
+ * Header for all VSS messages.
+ */
+struct hv_vss_hdr {
+	__u8 operation;
+	__u8 reserved[7];
+} __attribute__((packed));
+
+
+/*
+ * Flag values for the hv_vss_check_feature. Linux supports only
+ * one value.
+ */
+#define VSS_HBU_NO_AUTO_RECOVERY	0x00000005
+
+struct hv_vss_check_feature {
+	__u32 flags;
+} __attribute__((packed));
+
+struct hv_vss_check_dm_info {
+	__u32 flags;
+} __attribute__((packed));
+
+/*
+ * struct hv_vss_msg encodes the fields that the Linux VSS
+ * driver accesses. However, FREEZE messages from Hyper-V contain
+ * additional LUN information that Linux doesn't use and are not
+ * represented in struct hv_vss_msg. A received FREEZE message may
+ * be as large as 6,260 bytes, so the driver must allocate at least
+ * that much space, not sizeof(struct hv_vss_msg). Other messages
+ * such as AUTO_RECOVER may be as large as 12,500 bytes. However,
+ * because the Linux VSS driver responds that it doesn't support
+ * auto-recovery, it should not receive such messages.
+ */
+struct hv_vss_msg {
+	union {
+		struct hv_vss_hdr vss_hdr;
+		int error;
+	};
+	union {
+		struct hv_vss_check_feature vss_cf;
+		struct hv_vss_check_dm_info dm_info;
+	};
+} __attribute__((packed));
+
+/*
+ * Implementation of a host to guest copy facility.
+ */
+
+#define FCOPY_VERSION_0 0
+#define FCOPY_VERSION_1 1
+#define FCOPY_CURRENT_VERSION FCOPY_VERSION_1
+#define W_MAX_PATH 260
+
+enum hv_fcopy_op {
+	START_FILE_COPY = 0,
+	WRITE_TO_FILE,
+	COMPLETE_FCOPY,
+	CANCEL_FCOPY,
+};
+
+struct hv_fcopy_hdr {
+	__u32 operation;
+	__u8 service_id0[16]; /* currently unused */
+	__u8 service_id1[16]; /* currently unused */
+} __attribute__((packed));
+
+#define OVER_WRITE	0x1
+#define CREATE_PATH	0x2
+
+struct hv_start_fcopy {
+	struct hv_fcopy_hdr hdr;
+	__u16 file_name[W_MAX_PATH];
+	__u16 path_name[W_MAX_PATH];
+	__u32 copy_flags;
+	__u64 file_size;
+} __attribute__((packed));
+
+/*
+ * The file is chunked into fragments.
+ */
+#define DATA_FRAGMENT	(6 * 1024)
+
+struct hv_do_fcopy {
+	struct hv_fcopy_hdr hdr;
+	__u32   pad;
+	__u64	offset;
+	__u32	size;
+	__u8	data[DATA_FRAGMENT];
+} __attribute__((packed));
+
+/*
+ * An implementation of HyperV key value pair (KVP) functionality for Linux.
+ *
+ *
+ * Copyright (C) 2010, Novell, Inc.
+ * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
+ *
+ */
+
+/*
+ * Maximum value size - used for both key names and value data, and includes
+ * any applicable NULL terminators.
+ *
+ * Note:  This limit is somewhat arbitrary, but falls easily within what is
+ * supported for all native guests (back to Win 2000) and what is reasonable
+ * for the IC KVP exchange functionality.  Note that Windows Me/98/95 are
+ * limited to 255 character key names.
+ *
+ * MSDN recommends not storing data values larger than 2048 bytes in the
+ * registry.
+ *
+ * Note:  This value is used in defining the KVP exchange message - this value
+ * cannot be modified without affecting the message size and compatibility.
+ */
+
+/*
+ * bytes, including any null terminators
+ */
+#define HV_KVP_EXCHANGE_MAX_VALUE_SIZE          (2048)
+
+
+/*
+ * Maximum key size - the registry limit for the length of an entry name
+ * is 256 characters, including the null terminator
+ */
+
+#define HV_KVP_EXCHANGE_MAX_KEY_SIZE            (512)
+
+/*
+ * In Linux, we implement the KVP functionality in two components:
+ * 1) The kernel component which is packaged as part of the hv_utils driver
+ * is responsible for communicating with the host and responsible for
+ * implementing the host/guest protocol. 2) A user level daemon that is
+ * responsible for data gathering.
+ *
+ * Host/Guest Protocol: The host iterates over an index and expects the guest
+ * to assign a key name to the index and also return the value corresponding to
+ * the key. The host will have atmost one KVP transaction outstanding at any
+ * given point in time. The host side iteration stops when the guest returns
+ * an error. Microsoft has specified the following mapping of key names to
+ * host specified index:
+ *
+ *	Index		Key Name
+ *	0		FullyQualifiedDomainName
+ *	1		IntegrationServicesVersion
+ *	2		NetworkAddressIPv4
+ *	3		NetworkAddressIPv6
+ *	4		OSBuildNumber
+ *	5		OSName
+ *	6		OSMajorVersion
+ *	7		OSMinorVersion
+ *	8		OSVersion
+ *	9		ProcessorArchitecture
+ *
+ * The Windows host expects the Key Name and Key Value to be encoded in utf16.
+ *
+ * Guest Kernel/KVP Daemon Protocol: As noted earlier, we implement all of the
+ * data gathering functionality in a user mode daemon. The user level daemon
+ * is also responsible for binding the key name to the index as well. The
+ * kernel and user-level daemon communicate using a connector channel.
+ *
+ * The user mode component first registers with the
+ * kernel component. Subsequently, the kernel component requests, data
+ * for the specified keys. In response to this message the user mode component
+ * fills in the value corresponding to the specified key. We overload the
+ * sequence field in the cn_msg header to define our KVP message types.
+ *
+ *
+ * The kernel component simply acts as a conduit for communication between the
+ * Windows host and the user-level daemon. The kernel component passes up the
+ * index received from the Host to the user-level daemon. If the index is
+ * valid (supported), the corresponding key as well as its
+ * value (both are strings) is returned. If the index is invalid
+ * (not supported), a NULL key string is returned.
+ */
+
+
+/*
+ * Registry value types.
+ */
+
+#define REG_SZ 1
+#define REG_U32 4
+#define REG_U64 8
+
+/*
+ * As we look at expanding the KVP functionality to include
+ * IP injection functionality, we need to maintain binary
+ * compatibility with older daemons.
+ *
+ * The KVP opcodes are defined by the host and it was unfortunate
+ * that I chose to treat the registration operation as part of the
+ * KVP operations defined by the host.
+ * Here is the level of compatibility
+ * (between the user level daemon and the kernel KVP driver) that we
+ * will implement:
+ *
+ * An older daemon will always be supported on a newer driver.
+ * A given user level daemon will require a minimal version of the
+ * kernel driver.
+ * If we cannot handle the version differences, we will fail gracefully
+ * (this can happen when we have a user level daemon that is more
+ * advanced than the KVP driver.
+ *
+ * We will use values used in this handshake for determining if we have
+ * workable user level daemon and the kernel driver. We begin by taking the
+ * registration opcode out of the KVP opcode namespace. We will however,
+ * maintain compatibility with the existing user-level daemon code.
+ */
+
+/*
+ * Daemon code not supporting IP injection (legacy daemon).
+ */
+
+#define KVP_OP_REGISTER	4
+
+/*
+ * Daemon code supporting IP injection.
+ * The KVP opcode field is used to communicate the
+ * registration information; so define a namespace that
+ * will be distinct from the host defined KVP opcode.
+ */
+
+#define KVP_OP_REGISTER1 100
+
+enum hv_kvp_exchg_op {
+	KVP_OP_GET = 0,
+	KVP_OP_SET,
+	KVP_OP_DELETE,
+	KVP_OP_ENUMERATE,
+	KVP_OP_GET_IP_INFO,
+	KVP_OP_SET_IP_INFO,
+	KVP_OP_COUNT /* Number of operations, must be last. */
+};
+
+enum hv_kvp_exchg_pool {
+	KVP_POOL_EXTERNAL = 0,
+	KVP_POOL_GUEST,
+	KVP_POOL_AUTO,
+	KVP_POOL_AUTO_EXTERNAL,
+	KVP_POOL_AUTO_INTERNAL,
+	KVP_POOL_COUNT /* Number of pools, must be last. */
+};
+
+/*
+ * Some Hyper-V status codes.
+ */
+
+#define HV_S_OK				0x00000000
+#define HV_E_FAIL			0x80004005
+#define HV_S_CONT			0x80070103
+#define HV_ERROR_NOT_SUPPORTED		0x80070032
+#define HV_ERROR_MACHINE_LOCKED		0x800704F7
+#define HV_ERROR_DEVICE_NOT_CONNECTED	0x8007048F
+#define HV_INVALIDARG			0x80070057
+#define HV_GUID_NOTFOUND		0x80041002
+#define HV_ERROR_ALREADY_EXISTS		0x80070050
+#define HV_ERROR_DISK_FULL		0x80070070
+
+#define ADDR_FAMILY_NONE	0x00
+#define ADDR_FAMILY_IPV4	0x01
+#define ADDR_FAMILY_IPV6	0x02
+
+#define MAX_ADAPTER_ID_SIZE	128
+#define MAX_IP_ADDR_SIZE	1024
+#define MAX_GATEWAY_SIZE	512
+
+
+struct hv_kvp_ipaddr_value {
+	__u16	adapter_id[MAX_ADAPTER_ID_SIZE];
+	__u8	addr_family;
+	__u8	dhcp_enabled;
+	__u16	ip_addr[MAX_IP_ADDR_SIZE];
+	__u16	sub_net[MAX_IP_ADDR_SIZE];
+	__u16	gate_way[MAX_GATEWAY_SIZE];
+	__u16	dns_addr[MAX_IP_ADDR_SIZE];
+} __attribute__((packed));
+
+
+struct hv_kvp_hdr {
+	__u8 operation;
+	__u8 pool;
+	__u16 pad;
+} __attribute__((packed));
+
+struct hv_kvp_exchg_msg_value {
+	__u32 value_type;
+	__u32 key_size;
+	__u32 value_size;
+	__u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
+	union {
+		__u8 value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
+		__u32 value_u32;
+		__u64 value_u64;
+	};
+} __attribute__((packed));
+
+struct hv_kvp_msg_enumerate {
+	__u32 index;
+	struct hv_kvp_exchg_msg_value data;
+} __attribute__((packed));
+
+struct hv_kvp_msg_get {
+	struct hv_kvp_exchg_msg_value data;
+};
+
+struct hv_kvp_msg_set {
+	struct hv_kvp_exchg_msg_value data;
+};
+
+struct hv_kvp_msg_delete {
+	__u32 key_size;
+	__u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
+};
+
+struct hv_kvp_register {
+	__u8 version[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
+};
+
+struct hv_kvp_msg {
+	union {
+		struct hv_kvp_hdr	kvp_hdr;
+		int error;
+	};
+	union {
+		struct hv_kvp_msg_get		kvp_get;
+		struct hv_kvp_msg_set		kvp_set;
+		struct hv_kvp_msg_delete	kvp_delete;
+		struct hv_kvp_msg_enumerate	kvp_enum_data;
+		struct hv_kvp_ipaddr_value      kvp_ip_val;
+		struct hv_kvp_register		kvp_register;
+	} body;
+} __attribute__((packed));
+
+struct hv_kvp_ip_msg {
+	__u8 operation;
+	__u8 pool;
+	struct hv_kvp_ipaddr_value      kvp_ip_val;
+} __attribute__((packed));
+
+#endif /* _UAPI_HYPERV_H */
diff --git a/hyper-v.kvp.gethostname.patch b/hyper-v.kvp.gethostname.patch
new file mode 100644
index 0000000..4a2597b
--- /dev/null
+++ b/hyper-v.kvp.gethostname.patch
@@ -0,0 +1,149 @@
+--- a/hyper-v.tools.hv.hv_kvp_daemon.c
++++ b/hyper-v.tools.hv.hv_kvp_daemon.c
+@@ -24,6 +24,7 @@
+ 
+ #include <sys/poll.h>
+ #include <sys/utsname.h>
++#include <stdbool.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <unistd.h>
+@@ -677,6 +678,83 @@ static void kvp_process_ipconfig_file(ch
+ 	pclose(file);
+ }
+ 
++static bool kvp_verify_ip_address(void *address_string)
++{
++	char verify_buf[sizeof(struct in6_addr)];
++
++	if (inet_pton(AF_INET, address_string, verify_buf) == 1)
++		return true;
++	if (inet_pton(AF_INET6, address_string, verify_buf) == 1)
++		return true;
++	return false;
++}
++
++static void kvp_extract_routes(void **output, size_t *output_len, char *line)
++{
++	static const char needle[] = "via ";
++	char *match, *haystack = line;
++
++	while ((match = strstr(haystack, needle))) {
++		char *address, *end;
++
++		/* Address starts after needle. */
++		address = match + strlen(needle);
++
++		/* The char following address is a space or end of line. */
++		end = strpbrk(address, " \t\\");
++		if (!end)
++			end = address + strlen(address) + 1;
++
++		/* Enough room for address and semicolon. */
++		if (*output_len >= (end - address) + 1) {
++			memcpy(*output, address, end - address);
++			/* Terminate string for verification. */
++			memcpy(*output + (end - address), "", 1);
++			if (kvp_verify_ip_address(*output)) {
++				/* Advance output buffer. */
++				*output += end - address;
++				*output_len -= end - address;
++
++				/* Each address needs a trailing semicolon. */
++				memcpy(*output, ";", 1);
++				*output += 1;
++				*output_len -= 1;
++			}
++		}
++		haystack = end;
++	}
++}
++
++static void kvp_get_gateway(void *buffer, size_t buffer_len)
++{
++	static const char needle[] = "default ";
++	FILE *f;
++	void *output = buffer;
++	char *line = NULL;
++	size_t alloc_size = 0, output_len = buffer_len - 1;
++	ssize_t num_chars;
++
++	/* Show route information in a single line, for each address family */
++	f = popen("ip --oneline -4 route show;exec ip --oneline -6 route show", "r");
++	while ((num_chars = getline(&line, &alloc_size, f)) > 0) {
++		/* Skip short lines. */
++		if (num_chars <= strlen(needle))
++			continue;
++		/* Skip lines without default route. */
++		if (memcmp(line, needle, strlen(needle)))
++			continue;
++		/* Remove trailing newline to simplify further parsing. */
++		if (line[num_chars - 1] == '\n')
++			line[num_chars - 1] = '\0';
++		/* Search routes after match. */
++		kvp_extract_routes(&output, &output_len, line + strlen(needle));
++	}
++	/* Convert buffer into C-String. */
++	memcpy(output, "", 1);
++	free(line);
++	pclose(f);
++}
++
+ static void kvp_get_ipconfig_info(char *if_name,
+ 				 struct hv_kvp_ipaddr_value *buffer)
+ {
+@@ -684,32 +762,7 @@ static void kvp_get_ipconfig_info(char *
+ 	char dhcp_info[128];
+ 	char *p;
+ 	FILE *file;
+-
+-	/*
+-	 * Get the address of default gateway (ipv4).
+-	 */
+-	sprintf(cmd, "%s %s", "ip route show dev", if_name);
+-	strcat(cmd, " | awk '/default/ {print $3 }'");
+-
+-	/*
+-	 * Execute the command to gather gateway info.
+-	 */
+-	kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
+-				(MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
+-
+-	/*
+-	 * Get the address of default gateway (ipv6).
+-	 */
+-	sprintf(cmd, "%s %s", "ip -f inet6  route show dev", if_name);
+-	strcat(cmd, " | awk '/default/ {print $3 }'");
+-
+-	/*
+-	 * Execute the command to gather gateway info (ipv6).
+-	 */
+-	kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
+-				(MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
+-
+-
++	kvp_get_gateway(buffer->gate_way, sizeof(buffer->gate_way));
+ 	/*
+ 	 * Gather the DNS state.
+ 	 * Since there is no standard way to get this information
+@@ -1335,6 +1335,7 @@ kvp_get_domain_name(char *buffer, int le
+ 	struct addrinfo	hints, *info ;
+ 	int error = 0;
+ 
++	return;
+ 	gethostname(buffer, length);
+ 	memset(&hints, 0, sizeof(hints));
+ 	hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
+@@ -1572,6 +1573,12 @@ int main(int argc, char *argv[])
+ 
+ 		switch (hv_msg->body.kvp_enum_data.index) {
+ 		case FullyQualifiedDomainName:
++			/*
++			 * The API is undocumented.
++			 * The Host can not possibly care about DNS within the guest network
++			 * The time it takes to get the hostname is much shorter than a DNS lookup.
++			 */
++			gethostname(full_domain_name, sizeof(full_domain_name));
+ 			strcpy(key_value, full_domain_name);
+ 			strcpy(key_name, "FullyQualifiedDomainName");
+ 			break;
diff --git a/hyper-v.kvptest.ps1.txt b/hyper-v.kvptest.ps1.txt
new file mode 100644
index 0000000..e058cfe
--- /dev/null
+++ b/hyper-v.kvptest.ps1.txt
@@ -0,0 +1,49 @@
+# Windows PowerShell script to test Key Value Pair functionality
+#
+# http://blogs.msdn.com/b/virtual_pc_guy/archive/2008/11/18/hyper-v-script-looking-at-kvp-guestintrinsicexchangeitems.aspx
+#
+# Per default execution of scripts is disabled.
+# http://technet.microsoft.com/en-us/library/ee176949.aspx
+# The command 'Set-ExecutionPolicy RemoteSigned' will enable it.
+#
+# Filter for parsing XML data
+filter Import-CimXml
+{
+   # Create new XML object from input
+   $CimXml = [Xml]$_
+   $CimObj = New-Object -TypeName System.Object
+
+   # Iterate over the data and pull out just the value name and data for each entry
+   foreach ($CimProperty in $CimXml.SelectNodes("/INSTANCE/PROPERTY[@NAME='Name']"))
+      {
+         $CimObj | Add-Member -MemberType NoteProperty -Name $CimProperty.NAME -Value $CimProperty.VALUE
+      }
+
+   foreach ($CimProperty in $CimXml.SelectNodes("/INSTANCE/PROPERTY[@NAME='Data']"))
+      {
+         $CimObj | Add-Member -MemberType NoteProperty -Name $CimProperty.NAME -Value $CimProperty.VALUE
+      }
+
+   # Display output
+   $CimObj
+}
+
+# Prompt for the Hyper-V Server to use
+$HyperVServer = Read-Host "Specify the Hyper-V Server to use (enter '.' for the local computer)"
+
+# Prompt for the virtual machine to use
+$VMName = Read-Host "Specify the name of the virtual machine"
+
+# Get the virtual machine object
+$query = "Select * From Msvm_ComputerSystem Where ElementName='" + $VMName + "'"
+$Vm = gwmi -namespace root\virtualization -query $query -computername $HyperVServer
+
+# Get the KVP Object
+$query = "Associators of {$Vm} Where AssocClass=Msvm_SystemDevice ResultClass=Msvm_KvpExchangeComponent"
+$Kvp = gwmi -namespace root\virtualization -query $query -computername $HyperVServer
+
+Write-Host
+Write-Host "Guest KVP information for" $VMName
+
+# Filter the results
+$Kvp.GuestIntrinsicExchangeItems | Import-CimXml
diff --git a/hyper-v.lsvmbus.py b/hyper-v.lsvmbus.py
new file mode 100644
index 0000000..efd3233
--- /dev/null
+++ b/hyper-v.lsvmbus.py
@@ -0,0 +1,112 @@
+#!/usr/bin/python3
+# SPDX-License-Identifier: GPL-2.0
+
+import os
+from optparse import OptionParser
+
+help_msg = "print verbose messages. Try -vv, -vvv for  more verbose messages"
+parser = OptionParser()
+parser.add_option(
+	"-v", "--verbose", dest="verbose", help=help_msg, action="count")
+
+(options, args) = parser.parse_args()
+
+verbose = 0
+if options.verbose is not None:
+	verbose = options.verbose
+
+vmbus_sys_path = '/sys/bus/vmbus/devices'
+if not os.path.isdir(vmbus_sys_path):
+	print("%s doesn't exist: exiting..." % vmbus_sys_path)
+	exit(-1)
+
+vmbus_dev_dict = {
+	'{0e0b6031-5213-4934-818b-38d90ced39db}': '[Operating system shutdown]',
+	'{9527e630-d0ae-497b-adce-e80ab0175caf}': '[Time Synchronization]',
+	'{57164f39-9115-4e78-ab55-382f3bd5422d}': '[Heartbeat]',
+	'{a9a0f4e7-5a45-4d96-b827-8a841e8c03e6}': '[Data Exchange]',
+	'{35fa2e29-ea23-4236-96ae-3a6ebacba440}': '[Backup (volume checkpoint)]',
+	'{34d14be3-dee4-41c8-9ae7-6b174977c192}': '[Guest services]',
+	'{525074dc-8985-46e2-8057-a307dc18a502}': '[Dynamic Memory]',
+	'{cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a}': 'Synthetic mouse',
+	'{f912ad6d-2b17-48ea-bd65-f927a61c7684}': 'Synthetic keyboard',
+	'{da0a7802-e377-4aac-8e77-0558eb1073f8}': 'Synthetic framebuffer adapter',
+	'{f8615163-df3e-46c5-913f-f2d2f965ed0e}': 'Synthetic network adapter',
+	'{32412632-86cb-44a2-9b5c-50d1417354f5}': 'Synthetic IDE Controller',
+	'{ba6163d9-04a1-4d29-b605-72e2ffb1dc7f}': 'Synthetic SCSI Controller',
+	'{2f9bcc4a-0069-4af3-b76b-6fd0be528cda}': 'Synthetic fiber channel adapter',
+	'{8c2eaf3d-32a7-4b09-ab99-bd1f1c86b501}': 'Synthetic RDMA adapter',
+	'{44c4f61d-4444-4400-9d52-802e27ede19f}': 'PCI Express pass-through',
+	'{276aacf4-ac15-426c-98dd-7521ad3f01fe}': '[Reserved system device]',
+	'{f8e65716-3cb3-4a06-9a60-1889c5cccab5}': '[Reserved system device]',
+	'{3375baf4-9e15-4b30-b765-67acb10d607b}': '[Reserved system device]',
+}
+
+
+def get_vmbus_dev_attr(dev_name, attr):
+	try:
+		f = open('%s/%s/%s' % (vmbus_sys_path, dev_name, attr), 'r')
+		lines = f.readlines()
+		f.close()
+	except IOError:
+		lines = []
+
+	return lines
+
+
+class VMBus_Dev:
+	pass
+
+
+vmbus_dev_list = []
+
+for f in os.listdir(vmbus_sys_path):
+	vmbus_id = get_vmbus_dev_attr(f, 'id')[0].strip()
+	class_id = get_vmbus_dev_attr(f, 'class_id')[0].strip()
+	device_id = get_vmbus_dev_attr(f, 'device_id')[0].strip()
+	dev_desc = vmbus_dev_dict.get(class_id, 'Unknown')
+
+	chn_vp_mapping = get_vmbus_dev_attr(f, 'channel_vp_mapping')
+	chn_vp_mapping = [c.strip() for c in chn_vp_mapping]
+	chn_vp_mapping = sorted(
+		chn_vp_mapping, key=lambda c: int(c.split(':')[0]))
+
+	chn_vp_mapping = [
+		'\tRel_ID=%s, target_cpu=%s' %
+		(c.split(':')[0], c.split(':')[1]) for c in chn_vp_mapping
+	]
+	d = VMBus_Dev()
+	d.sysfs_path = '%s/%s' % (vmbus_sys_path, f)
+	d.vmbus_id = vmbus_id
+	d.class_id = class_id
+	d.device_id = device_id
+	d.dev_desc = dev_desc
+	d.chn_vp_mapping = '\n'.join(chn_vp_mapping)
+	if d.chn_vp_mapping:
+		d.chn_vp_mapping += '\n'
+
+	vmbus_dev_list.append(d)
+
+
+vmbus_dev_list = sorted(vmbus_dev_list, key=lambda d: int(d.vmbus_id))
+
+format0 = '%2s: %s'
+format1 = '%2s: Class_ID = %s - %s\n%s'
+format2 = '%2s: Class_ID = %s - %s\n\tDevice_ID = %s\n\tSysfs path: %s\n%s'
+
+for d in vmbus_dev_list:
+	if verbose == 0:
+		print(('VMBUS ID ' + format0) % (d.vmbus_id, d.dev_desc))
+	elif verbose == 1:
+		print(
+			('VMBUS ID ' + format1) %
+			(d.vmbus_id, d.class_id, d.dev_desc, d.chn_vp_mapping)
+		)
+	else:
+		print(
+			('VMBUS ID ' + format2) %
+			(
+				d.vmbus_id, d.class_id, d.dev_desc,
+				d.device_id, d.sysfs_path, d.chn_vp_mapping
+			)
+		)
diff --git a/hyper-v.spec b/hyper-v.spec
new file mode 100644
index 0000000..fc98fcc
--- /dev/null
+++ b/hyper-v.spec
@@ -0,0 +1,269 @@
+#
+# spec file for package hyper-v
+#
+# Copyright (c) 2024 SUSE LLC
+#
+# All modifications and additions to the file contributed by third parties
+# remain the property of their copyright owners, unless otherwise agreed
+# upon. The license for this file, and modifications and additions to the
+# file, is the same license as for the pristine package itself (unless the
+# license for the pristine package is not an Open Source License, in which
+# case the license is the MIT License). An "Open Source License" is a
+# license that conforms to the Open Source Definition (Version 1.9)
+# published by the Open Source Initiative.
+
+# Please submit bugfixes or comments via https://bugs.opensuse.org/
+#
+
+
+%define hv_kvp_daemon hv_kvp_daemon
+%define hv_vss_daemon hv_vss_daemon
+%define hv_fcopy_daemon hv_fcopy_daemon
+%define vmbus_bufring vmbus_bufring
+%define hv_fcopy_uio_daemon hv_fcopy_uio_daemon
+%define include_uapi_linux_hyperv include_uapi_linux_hyperv
+%define chardev_kvp vmbus/hv_kvp
+%define chardev_vss vmbus/hv_vss
+%define chardev_fcopy vmbus/hv_fcopy
+%define helper_dir /usr/lib/%name
+
+Name:           hyper-v
+ExclusiveArch:  %ix86 x86_64 aarch64
+%{?systemd_requires}
+BuildRequires:  python-rpm-macros
+BuildRequires:  pkgconfig(systemd)
+# Due to usage of char device instead of netlink
+Conflicts:      kernel < 4.2
+Summary:        Microsoft Hyper-V tools
+License:        GPL-2.0-only
+Supplements:    modalias(dmi:*svnMicrosoftCorporation*pnVirtualMachine*rnVirtualMachine*)
+Supplements:    modalias(pci:v00001414d00005353sv*sd*bc*sc*i*)
+URL:            http://www.kernel.org
+# Arbitrary version number
+Version:        9
+Release:        0
+Source0:        hyper-v.lsvmbus.py
+Source7:        hyper-v.compare-with-upstream.sh
+Source8:        hyper-v.tools.hv.vmbus_bufring.h
+Source9:        hyper-v.include.linux.hyperv.h
+Source10:       hyper-v.tools.hv.hv_kvp_daemon.c
+Source11:       hyper-v.tools.hv.vmbus_bufring.c
+Source12:       hyper-v.tools.hv.hv_vss_daemon.c
+Source13:       hyper-v.tools.hv.hv_fcopy_uio_daemon.c
+Source14:       hyper-v.tools.hv.hv_fcopy_daemon.c
+Source20:       hyper-v.tools.hv.hv_get_dhcp_info.sh
+Source21:       hyper-v.tools.hv.hv_get_dns_info.sh
+Source22:       hyper-v.tools.hv.hv_set_ifconfig.sh
+
+Patch0:         hyper-v.kvp.gethostname.patch
+
+%description
+This package contains the Microsoft Hyper-V tools.
+
+%prep
+%setup -Tc
+cp -vL %{S:8} %vmbus_bufring.h
+cp -vL %{S:9} %include_uapi_linux_hyperv.h
+cp -vL %{S:10} .
+cp -vL %{S:11} %vmbus_bufring.c
+cp -vL %{S:12} %hv_vss_daemon.c
+cp -vL %{S:13} %hv_fcopy_uio_daemon.c
+cp -vL %{S:14} %hv_fcopy_daemon.c
+%patch -P 0 -p1
+mv `basename %{S:10}` %hv_kvp_daemon.c
+
+%build
+sed -i~ '/#include <linux.hyperv.h>/d' %hv_kvp_daemon.c
+sed -i~ '/#include <linux.hyperv.h>/d' %hv_vss_daemon.c
+sed -i~ '/#include <linux.hyperv.h>/d' %hv_fcopy_uio_daemon.c
+sed -i~ '/#include <linux.hyperv.h>/d' %hv_fcopy_daemon.c
+gcc \
+	$RPM_OPT_FLAGS \
+	-Wno-unused-variable \
+	-Wno-pointer-sign \
+	-D_GNU_SOURCE \
+	-g \
+	%hv_kvp_daemon.c \
+	-include %include_uapi_linux_hyperv.h \
+	-DCN_KVP_IDX=0x9 \
+	-DCN_KVP_VAL=0x1 \
+	-DKVP_SCRIPTS_PATH= \
+	-pthread \
+	-o %hv_kvp_daemon
+gcc \
+	$RPM_OPT_FLAGS \
+	-Wno-unused-variable \
+	-Wno-pointer-sign \
+	-D_GNU_SOURCE \
+	-g \
+	%hv_vss_daemon.c \
+	-include %include_uapi_linux_hyperv.h \
+	-DCN_VSS_IDX=0xa \
+	-DCN_VSS_VAL=0x1 \
+	-o %hv_vss_daemon
+gcc \
+	$RPM_OPT_FLAGS \
+	-Wno-unused-variable \
+	-Wno-pointer-sign \
+	-D_GNU_SOURCE \
+	-g \
+	%hv_fcopy_daemon.c \
+	-include %include_uapi_linux_hyperv.h \
+	-o %hv_fcopy_daemon
+
+%ifarch %ix86 x86_64
+gcc \
+	$RPM_OPT_FLAGS \
+	-Wno-unused-variable \
+	-Wno-pointer-sign \
+	-Wno-address-of-packed-member \
+	-D_GNU_SOURCE \
+	-g \
+	%vmbus_bufring.c \
+	%hv_fcopy_uio_daemon.c \
+	-include %include_uapi_linux_hyperv.h \
+	-o %hv_fcopy_uio_daemon
+%endif
+
+%install
+# It is not a callable app anyway, so move it out of the way
+bindir=%helper_dir/bin
+mkdir -p %buildroot${bindir}
+mkdir -p %buildroot%_sbindir
+install -m755 %hv_kvp_daemon %buildroot${bindir}
+install -m755 %hv_vss_daemon %buildroot${bindir}
+install -m755 %hv_fcopy_daemon %buildroot${bindir}
+%ifarch %ix86 x86_64
+install -m755 %hv_fcopy_uio_daemon %buildroot${bindir}
+%endif
+cp -avL %{S:0} %buildroot%_sbindir/lsvmbus
+chmod 0755 %buildroot%_sbindir/lsvmbus
+cp -avL %{S:20} %buildroot${bindir}/hv_get_dhcp_info
+cp -avL %{S:21} %buildroot${bindir}/hv_get_dns_info
+cp -avL %{S:22} %buildroot${bindir}/hv_set_ifconfig
+chmod 755 %buildroot${bindir}/*
+d=%buildroot%_unitdir
+mkdir -vp ${d}
+#
+tee ${d}/%hv_kvp_daemon.service <<EOF
+# started via %_udevrulesdir/%name.rules
+[Unit]
+Description=Hyper-V KVP Daemon
+After=local-fs.target
+ConditionVirtualization=microsoft
+ConditionPathExists=/dev/%chardev_kvp
+
+[Service]
+Environment="PATH=${bindir}:/usr/sbin:/usr/bin:/sbin:/bin"
+ExecStart=${bindir}/%hv_kvp_daemon --no-daemon
+Restart=on-failure
+
+[Install]
+WantedBy=default.target
+EOF
+#
+tee ${d}/%hv_vss_daemon.service <<EOF
+# started via %_udevrulesdir/%name.rules
+[Unit]
+Description=Hyper-V VSS Daemon
+ConditionVirtualization=microsoft
+ConditionPathExists=/dev/%chardev_vss
+
+[Service]
+ExecStart=${bindir}/%hv_vss_daemon --no-daemon
+Restart=on-failure
+
+[Install]
+WantedBy=default.target
+EOF
+#
+tee ${d}/%hv_fcopy_daemon.service <<EOF
+# started via %_udevrulesdir/%name.rules
+[Unit]
+Description=Hyper-V host to guest file copy daemon
+ConditionVirtualization=microsoft
+ConditionPathExists=/dev/%chardev_fcopy
+
+[Service]
+ExecStart=${bindir}/%hv_fcopy_daemon --no-daemon
+Restart=on-failure
+
+[Install]
+WantedBy=default.target
+EOF
+#
+tee ${d}/%hv_fcopy_uio_daemon.service <<EOF
+# started via %_udevrulesdir/%name.rules
+[Unit]
+Description=Hyper-V host to guest UIO file copy daemon
+ConditionVirtualization=microsoft
+ConditionPathExists=/sys/bus/vmbus/drivers/uio_hv_generic/new_id
+ConditionPathExists=!/dev/%chardev_fcopy
+
+[Service]
+ExecStartPre=/bin/sh -c 'set -e;echo 34d14be3-dee4-41c8-9ae7-6b174977c192 > /sys/bus/vmbus/drivers/uio_hv_generic/new_id'
+ExecStart=${bindir}/%hv_fcopy_uio_daemon --no-daemon
+Restart=on-failure
+
+[Install]
+WantedBy=default.target
+EOF
+#
+#
+#
+d=%buildroot%_udevrulesdir
+mkdir -vp ${d}
+tee ${d}/%name.rules <<EOF
+ACTION=="add", KERNEL=="%chardev_kvp", TAG+="systemd", ENV{SYSTEMD_WANTS}+="%hv_kvp_daemon.service"
+ACTION=="add", KERNEL=="%chardev_vss", TAG+="systemd", ENV{SYSTEMD_WANTS}+="%hv_vss_daemon.service"
+ACTION=="add", KERNEL=="%chardev_fcopy", TAG+="systemd", ENV{SYSTEMD_WANTS}+="%hv_fcopy_daemon.service"
+ACTION=="add", SUBSYSTEM=="vmbus", ATTRS{class_id}=="{34d14be3-dee4-41c8-9ae7-6b174977c192}", RUN{builtin}+="kmod load uio_hv_generic", TAG+="systemd", ENV{SYSTEMD_WANTS}+="%hv_fcopy_uio_daemon.service"
+EOF
+#
+#
+helper=inst_sys.sh
+tee %buildroot${bindir}/${helper} <<'_EOF_'
+#!/bin/bash
+# Starting daemons via RUN== in udev rules is not supported.
+# In inst-sys systemd is not used, so start all daemons manually.
+bindir=%helper_dir/bin
+declare -a helpers
+test -c /dev/%chardev_kvp && helpers+=(%hv_kvp_daemon)
+test -c /dev/%chardev_vss && helpers+=(%hv_vss_daemon)
+if test -c /dev/%chardev_fcopy
+then
+	helpers+=(%hv_fcopy_daemon)
+else
+	modprobe -v uio_hv_generic
+	if test -f /sys/bus/vmbus/drivers/uio_hv_generic/new_id
+	then
+		echo '34d14be3-dee4-41c8-9ae7-6b174977c192' > /sys/bus/vmbus/drivers/uio_hv_generic/new_id
+		helpers+=(%hv_fcopy_uio_daemon)
+	fi
+fi
+if test -d /sys/bus/vmbus/devices
+then
+	export PATH=${bindir}:$PATH
+	echo -n "Starting hyper-v helpers:"
+	for i in "${helpers[@]}"
+	do
+		if mkdir /run/$i
+		then
+			echo -n " $i"
+			$i < /dev/null &
+		fi
+	done
+	echo " ... done"
+fi
+_EOF_
+chmod 755 %buildroot${bindir}/${helper}
+#
+%?python3_fix_shebang
+
+%files
+%_unitdir/*
+%_udevrulesdir/*
+%_sbindir/*
+%helper_dir
+
+%changelog
diff --git a/hyper-v.tools.hv.hv_fcopy_daemon.c b/hyper-v.tools.hv.hv_fcopy_daemon.c
new file mode 100644
index 0000000..11628d1
--- /dev/null
+++ b/hyper-v.tools.hv.hv_fcopy_daemon.c
@@ -0,0 +1,266 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * An implementation of host to guest copy functionality for Linux.
+ *
+ * Copyright (C) 2014, Microsoft, Inc.
+ *
+ * Author : K. Y. Srinivasan <kys@microsoft.com>
+ */
+
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <linux/hyperv.h>
+#include <linux/limits.h>
+#include <syslog.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <getopt.h>
+
+static int target_fd;
+static char target_fname[PATH_MAX];
+static unsigned long long filesize;
+
+static int hv_start_fcopy(struct hv_start_fcopy *smsg)
+{
+	int error = HV_E_FAIL;
+	char *q, *p;
+
+	filesize = 0;
+	p = (char *)smsg->path_name;
+	snprintf(target_fname, sizeof(target_fname), "%s/%s",
+		 (char *)smsg->path_name, (char *)smsg->file_name);
+
+	syslog(LOG_INFO, "Target file name: %s", target_fname);
+	/*
+	 * Check to see if the path is already in place; if not,
+	 * create if required.
+	 */
+	while ((q = strchr(p, '/')) != NULL) {
+		if (q == p) {
+			p++;
+			continue;
+		}
+		*q = '\0';
+		if (access((char *)smsg->path_name, F_OK)) {
+			if (smsg->copy_flags & CREATE_PATH) {
+				if (mkdir((char *)smsg->path_name, 0755)) {
+					syslog(LOG_ERR, "Failed to create %s",
+						(char *)smsg->path_name);
+					goto done;
+				}
+			} else {
+				syslog(LOG_ERR, "Invalid path: %s",
+					(char *)smsg->path_name);
+				goto done;
+			}
+		}
+		p = q + 1;
+		*q = '/';
+	}
+
+	if (!access(target_fname, F_OK)) {
+		syslog(LOG_INFO, "File: %s exists", target_fname);
+		if (!(smsg->copy_flags & OVER_WRITE)) {
+			error = HV_ERROR_ALREADY_EXISTS;
+			goto done;
+		}
+	}
+
+	target_fd = open(target_fname,
+			 O_RDWR | O_CREAT | O_TRUNC | O_CLOEXEC, 0744);
+	if (target_fd == -1) {
+		syslog(LOG_INFO, "Open Failed: %s", strerror(errno));
+		goto done;
+	}
+
+	error = 0;
+done:
+	if (error)
+		target_fname[0] = '\0';
+	return error;
+}
+
+static int hv_copy_data(struct hv_do_fcopy *cpmsg)
+{
+	ssize_t bytes_written;
+	int ret = 0;
+
+	bytes_written = pwrite(target_fd, cpmsg->data, cpmsg->size,
+				cpmsg->offset);
+
+	filesize += cpmsg->size;
+	if (bytes_written != cpmsg->size) {
+		switch (errno) {
+		case ENOSPC:
+			ret = HV_ERROR_DISK_FULL;
+			break;
+		default:
+			ret = HV_E_FAIL;
+			break;
+		}
+		syslog(LOG_ERR, "pwrite failed to write %llu bytes: %ld (%s)",
+		       filesize, (long)bytes_written, strerror(errno));
+	}
+
+	return ret;
+}
+
+/*
+ * Reset target_fname to "" in the two below functions for hibernation: if
+ * the fcopy operation is aborted by hibernation, the daemon should remove the
+ * partially-copied file; to achieve this, the hv_utils driver always fakes a
+ * CANCEL_FCOPY message upon suspend, and later when the VM resumes back,
+ * the daemon calls hv_copy_cancel() to remove the file; if a file is copied
+ * successfully before suspend, hv_copy_finished() must reset target_fname to
+ * avoid that the file can be incorrectly removed upon resume, since the faked
+ * CANCEL_FCOPY message is spurious in this case.
+ */
+static int hv_copy_finished(void)
+{
+	close(target_fd);
+	target_fname[0] = '\0';
+	return 0;
+}
+static int hv_copy_cancel(void)
+{
+	close(target_fd);
+	if (strlen(target_fname) > 0) {
+		unlink(target_fname);
+		target_fname[0] = '\0';
+	}
+	return 0;
+
+}
+
+void print_usage(char *argv[])
+{
+	fprintf(stderr, "Usage: %s [options]\n"
+		"Options are:\n"
+		"  -n, --no-daemon        stay in foreground, don't daemonize\n"
+		"  -h, --help             print this help\n", argv[0]);
+}
+
+int main(int argc, char *argv[])
+{
+	int fcopy_fd = -1;
+	int error;
+	int daemonize = 1, long_index = 0, opt;
+	int version = FCOPY_CURRENT_VERSION;
+	union {
+		struct hv_fcopy_hdr hdr;
+		struct hv_start_fcopy start;
+		struct hv_do_fcopy copy;
+		__u32 kernel_modver;
+	} buffer = { };
+	int in_handshake;
+
+	static struct option long_options[] = {
+		{"help",	no_argument,	   0,  'h' },
+		{"no-daemon",	no_argument,	   0,  'n' },
+		{0,		0,		   0,  0   }
+	};
+
+	while ((opt = getopt_long(argc, argv, "hn", long_options,
+				  &long_index)) != -1) {
+		switch (opt) {
+		case 'n':
+			daemonize = 0;
+			break;
+		case 'h':
+		default:
+			print_usage(argv);
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	if (daemonize && daemon(1, 0)) {
+		syslog(LOG_ERR, "daemon() failed; error: %s", strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	openlog("HV_FCOPY", 0, LOG_USER);
+	syslog(LOG_INFO, "starting; pid is:%d", getpid());
+
+reopen_fcopy_fd:
+	if (fcopy_fd != -1)
+		close(fcopy_fd);
+	/* Remove any possible partially-copied file on error */
+	hv_copy_cancel();
+	in_handshake = 1;
+	fcopy_fd = open("/dev/vmbus/hv_fcopy", O_RDWR);
+
+	if (fcopy_fd < 0) {
+		syslog(LOG_ERR, "open /dev/vmbus/hv_fcopy failed; error: %d %s",
+			errno, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	/*
+	 * Register with the kernel.
+	 */
+	if ((write(fcopy_fd, &version, sizeof(int))) != sizeof(int)) {
+		syslog(LOG_ERR, "Registration failed: %s", strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	while (1) {
+		/*
+		 * In this loop we process fcopy messages after the
+		 * handshake is complete.
+		 */
+		ssize_t len;
+
+		len = pread(fcopy_fd, &buffer, sizeof(buffer), 0);
+		if (len < 0) {
+			syslog(LOG_ERR, "pread failed: %s", strerror(errno));
+			goto reopen_fcopy_fd;
+		}
+
+		if (in_handshake) {
+			if (len != sizeof(buffer.kernel_modver)) {
+				syslog(LOG_ERR, "invalid version negotiation");
+				exit(EXIT_FAILURE);
+			}
+			in_handshake = 0;
+			syslog(LOG_INFO, "kernel module version: %u",
+			       buffer.kernel_modver);
+			continue;
+		}
+
+		switch (buffer.hdr.operation) {
+		case START_FILE_COPY:
+			error = hv_start_fcopy(&buffer.start);
+			break;
+		case WRITE_TO_FILE:
+			error = hv_copy_data(&buffer.copy);
+			break;
+		case COMPLETE_FCOPY:
+			error = hv_copy_finished();
+			break;
+		case CANCEL_FCOPY:
+			error = hv_copy_cancel();
+			break;
+
+		default:
+			error = HV_E_FAIL;
+			syslog(LOG_ERR, "Unknown operation: %d",
+				buffer.hdr.operation);
+
+		}
+
+		/*
+		 * pwrite() may return an error due to the faked CANCEL_FCOPY
+		 * message upon hibernation. Ignore the error by resetting the
+		 * dev file, i.e. closing and re-opening it.
+		 */
+		if (pwrite(fcopy_fd, &error, sizeof(int), 0) != sizeof(int)) {
+			syslog(LOG_ERR, "pwrite failed: %s", strerror(errno));
+			goto reopen_fcopy_fd;
+		}
+	}
+}
diff --git a/hyper-v.tools.hv.hv_fcopy_uio_daemon.c b/hyper-v.tools.hv.hv_fcopy_uio_daemon.c
new file mode 100644
index 0000000..cf19a75
--- /dev/null
+++ b/hyper-v.tools.hv.hv_fcopy_uio_daemon.c
@@ -0,0 +1,497 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * An implementation of host to guest copy functionality for Linux.
+ *
+ * Copyright (C) 2023, Microsoft, Inc.
+ *
+ * Author : K. Y. Srinivasan <kys@microsoft.com>
+ * Author : Saurabh Sengar <ssengar@microsoft.com>
+ *
+ */
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <locale.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <wchar.h>
+#include <sys/stat.h>
+#include <linux/hyperv.h>
+#include <linux/limits.h>
+#include "vmbus_bufring.h"
+
+#define ICMSGTYPE_NEGOTIATE	0
+#define ICMSGTYPE_FCOPY		7
+
+#define WIN8_SRV_MAJOR		1
+#define WIN8_SRV_MINOR		1
+#define WIN8_SRV_VERSION	(WIN8_SRV_MAJOR << 16 | WIN8_SRV_MINOR)
+
+#define FCOPY_UIO		"/sys/bus/vmbus/devices/eb765408-105f-49b6-b4aa-c123b64d17d4/uio"
+
+#define FCOPY_VER_COUNT		1
+static const int fcopy_versions[] = {
+	WIN8_SRV_VERSION
+};
+
+#define FW_VER_COUNT		1
+static const int fw_versions[] = {
+	UTIL_FW_VERSION
+};
+
+#define HV_RING_SIZE		0x4000 /* 16KB ring buffer size */
+
+static unsigned char desc[HV_RING_SIZE];
+
+static int target_fd;
+static char target_fname[PATH_MAX];
+static unsigned long long filesize;
+
+static int hv_fcopy_create_file(char *file_name, char *path_name, __u32 flags)
+{
+	int error = HV_E_FAIL;
+	char *q, *p;
+
+	filesize = 0;
+	p = path_name;
+	snprintf(target_fname, sizeof(target_fname), "%s/%s",
+		 path_name, file_name);
+
+	/*
+	 * Check to see if the path is already in place; if not,
+	 * create if required.
+	 */
+	while ((q = strchr(p, '/')) != NULL) {
+		if (q == p) {
+			p++;
+			continue;
+		}
+		*q = '\0';
+		if (access(path_name, F_OK)) {
+			if (flags & CREATE_PATH) {
+				if (mkdir(path_name, 0755)) {
+					syslog(LOG_ERR, "Failed to create %s",
+					       path_name);
+					goto done;
+				}
+			} else {
+				syslog(LOG_ERR, "Invalid path: %s", path_name);
+				goto done;
+			}
+		}
+		p = q + 1;
+		*q = '/';
+	}
+
+	if (!access(target_fname, F_OK)) {
+		syslog(LOG_INFO, "File: %s exists", target_fname);
+		if (!(flags & OVER_WRITE)) {
+			error = HV_ERROR_ALREADY_EXISTS;
+			goto done;
+		}
+	}
+
+	target_fd = open(target_fname,
+			 O_RDWR | O_CREAT | O_TRUNC | O_CLOEXEC, 0744);
+	if (target_fd == -1) {
+		syslog(LOG_INFO, "Open Failed: %s", strerror(errno));
+		goto done;
+	}
+
+	error = 0;
+done:
+	if (error)
+		target_fname[0] = '\0';
+	return error;
+}
+
+/* copy the data into the file */
+static int hv_copy_data(struct hv_do_fcopy *cpmsg)
+{
+	ssize_t len;
+	int ret = 0;
+
+	len = pwrite(target_fd, cpmsg->data, cpmsg->size, cpmsg->offset);
+
+	filesize += cpmsg->size;
+	if (len != cpmsg->size) {
+		switch (errno) {
+		case ENOSPC:
+			ret = HV_ERROR_DISK_FULL;
+			break;
+		default:
+			ret = HV_E_FAIL;
+			break;
+		}
+		syslog(LOG_ERR, "pwrite failed to write %llu bytes: %ld (%s)",
+		       filesize, (long)len, strerror(errno));
+	}
+
+	return ret;
+}
+
+static int hv_copy_finished(void)
+{
+	close(target_fd);
+	target_fname[0] = '\0';
+
+	return 0;
+}
+
+static void print_usage(char *argv[])
+{
+	fprintf(stderr, "Usage: %s [options]\n"
+		"Options are:\n"
+		"  -n, --no-daemon        stay in foreground, don't daemonize\n"
+		"  -h, --help             print this help\n", argv[0]);
+}
+
+static bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, unsigned char *buf,
+				      unsigned int buflen, const int *fw_version, int fw_vercnt,
+				const int *srv_version, int srv_vercnt,
+				int *nego_fw_version, int *nego_srv_version)
+{
+	int icframe_major, icframe_minor;
+	int icmsg_major, icmsg_minor;
+	int fw_major, fw_minor;
+	int srv_major, srv_minor;
+	int i, j;
+	bool found_match = false;
+	struct icmsg_negotiate *negop;
+
+	/* Check that there's enough space for icframe_vercnt, icmsg_vercnt */
+	if (buflen < ICMSG_HDR + offsetof(struct icmsg_negotiate, reserved)) {
+		syslog(LOG_ERR, "Invalid icmsg negotiate");
+		return false;
+	}
+
+	icmsghdrp->icmsgsize = 0x10;
+	negop = (struct icmsg_negotiate *)&buf[ICMSG_HDR];
+
+	icframe_major = negop->icframe_vercnt;
+	icframe_minor = 0;
+
+	icmsg_major = negop->icmsg_vercnt;
+	icmsg_minor = 0;
+
+	/* Validate negop packet */
+	if (icframe_major > IC_VERSION_NEGOTIATION_MAX_VER_COUNT ||
+	    icmsg_major > IC_VERSION_NEGOTIATION_MAX_VER_COUNT ||
+	    ICMSG_NEGOTIATE_PKT_SIZE(icframe_major, icmsg_major) > buflen) {
+		syslog(LOG_ERR, "Invalid icmsg negotiate - icframe_major: %u, icmsg_major: %u\n",
+		       icframe_major, icmsg_major);
+		goto fw_error;
+	}
+
+	/*
+	 * Select the framework version number we will
+	 * support.
+	 */
+
+	for (i = 0; i < fw_vercnt; i++) {
+		fw_major = (fw_version[i] >> 16);
+		fw_minor = (fw_version[i] & 0xFFFF);
+
+		for (j = 0; j < negop->icframe_vercnt; j++) {
+			if (negop->icversion_data[j].major == fw_major &&
+			    negop->icversion_data[j].minor == fw_minor) {
+				icframe_major = negop->icversion_data[j].major;
+				icframe_minor = negop->icversion_data[j].minor;
+				found_match = true;
+				break;
+			}
+		}
+
+		if (found_match)
+			break;
+	}
+
+	if (!found_match)
+		goto fw_error;
+
+	found_match = false;
+
+	for (i = 0; i < srv_vercnt; i++) {
+		srv_major = (srv_version[i] >> 16);
+		srv_minor = (srv_version[i] & 0xFFFF);
+
+		for (j = negop->icframe_vercnt;
+			(j < negop->icframe_vercnt + negop->icmsg_vercnt);
+			j++) {
+			if (negop->icversion_data[j].major == srv_major &&
+			    negop->icversion_data[j].minor == srv_minor) {
+				icmsg_major = negop->icversion_data[j].major;
+				icmsg_minor = negop->icversion_data[j].minor;
+				found_match = true;
+				break;
+			}
+		}
+
+		if (found_match)
+			break;
+	}
+
+	/*
+	 * Respond with the framework and service
+	 * version numbers we can support.
+	 */
+fw_error:
+	if (!found_match) {
+		negop->icframe_vercnt = 0;
+		negop->icmsg_vercnt = 0;
+	} else {
+		negop->icframe_vercnt = 1;
+		negop->icmsg_vercnt = 1;
+	}
+
+	if (nego_fw_version)
+		*nego_fw_version = (icframe_major << 16) | icframe_minor;
+
+	if (nego_srv_version)
+		*nego_srv_version = (icmsg_major << 16) | icmsg_minor;
+
+	negop->icversion_data[0].major = icframe_major;
+	negop->icversion_data[0].minor = icframe_minor;
+	negop->icversion_data[1].major = icmsg_major;
+	negop->icversion_data[1].minor = icmsg_minor;
+
+	return found_match;
+}
+
+static void wcstoutf8(char *dest, const __u16 *src, size_t dest_size)
+{
+	size_t len = 0;
+
+	while (len < dest_size) {
+		if (src[len] < 0x80)
+			dest[len++] = (char)(*src++);
+		else
+			dest[len++] = 'X';
+	}
+
+	dest[len] = '\0';
+}
+
+static int hv_fcopy_start(struct hv_start_fcopy *smsg_in)
+{
+	setlocale(LC_ALL, "en_US.utf8");
+	size_t file_size, path_size;
+	char *file_name, *path_name;
+	char *in_file_name = (char *)smsg_in->file_name;
+	char *in_path_name = (char *)smsg_in->path_name;
+
+	file_size = wcstombs(NULL, (const wchar_t *restrict)in_file_name, 0) + 1;
+	path_size = wcstombs(NULL, (const wchar_t *restrict)in_path_name, 0) + 1;
+
+	file_name = (char *)malloc(file_size * sizeof(char));
+	path_name = (char *)malloc(path_size * sizeof(char));
+
+	if (!file_name || !path_name) {
+		free(file_name);
+		free(path_name);
+		syslog(LOG_ERR, "Can't allocate memory for file name and/or path name");
+		return HV_E_FAIL;
+	}
+
+	wcstoutf8(file_name, (__u16 *)in_file_name, file_size);
+	wcstoutf8(path_name, (__u16 *)in_path_name, path_size);
+
+	return hv_fcopy_create_file(file_name, path_name, smsg_in->copy_flags);
+}
+
+static int hv_fcopy_send_data(struct hv_fcopy_hdr *fcopy_msg, int recvlen)
+{
+	int operation = fcopy_msg->operation;
+
+	/*
+	 * The  strings sent from the host are encoded in
+	 * utf16; convert it to utf8 strings.
+	 * The host assures us that the utf16 strings will not exceed
+	 * the max lengths specified. We will however, reserve room
+	 * for the string terminating character - in the utf16s_utf8s()
+	 * function we limit the size of the buffer where the converted
+	 * string is placed to W_MAX_PATH -1 to guarantee
+	 * that the strings can be properly terminated!
+	 */
+
+	switch (operation) {
+	case START_FILE_COPY:
+		return hv_fcopy_start((struct hv_start_fcopy *)fcopy_msg);
+	case WRITE_TO_FILE:
+		return hv_copy_data((struct hv_do_fcopy *)fcopy_msg);
+	case COMPLETE_FCOPY:
+		return hv_copy_finished();
+	}
+
+	return HV_E_FAIL;
+}
+
+/* process the packet recv from host */
+static int fcopy_pkt_process(struct vmbus_br *txbr)
+{
+	int ret, offset, pktlen;
+	int fcopy_srv_version;
+	const struct vmbus_chanpkt_hdr *pkt;
+	struct hv_fcopy_hdr *fcopy_msg;
+	struct icmsg_hdr *icmsghdr;
+
+	pkt = (const struct vmbus_chanpkt_hdr *)desc;
+	offset = pkt->hlen << 3;
+	pktlen = (pkt->tlen << 3) - offset;
+	icmsghdr = (struct icmsg_hdr *)&desc[offset + sizeof(struct vmbuspipe_hdr)];
+	icmsghdr->status = HV_E_FAIL;
+
+	if (icmsghdr->icmsgtype == ICMSGTYPE_NEGOTIATE) {
+		if (vmbus_prep_negotiate_resp(icmsghdr, desc + offset, pktlen, fw_versions,
+					      FW_VER_COUNT, fcopy_versions, FCOPY_VER_COUNT,
+					      NULL, &fcopy_srv_version)) {
+			syslog(LOG_INFO, "FCopy IC version %d.%d",
+			       fcopy_srv_version >> 16, fcopy_srv_version & 0xFFFF);
+			icmsghdr->status = 0;
+		}
+	} else if (icmsghdr->icmsgtype == ICMSGTYPE_FCOPY) {
+		/* Ensure recvlen is big enough to contain hv_fcopy_hdr */
+		if (pktlen < ICMSG_HDR + sizeof(struct hv_fcopy_hdr)) {
+			syslog(LOG_ERR, "Invalid Fcopy hdr. Packet length too small: %u",
+			       pktlen);
+			return -ENOBUFS;
+		}
+
+		fcopy_msg = (struct hv_fcopy_hdr *)&desc[offset + ICMSG_HDR];
+		icmsghdr->status = hv_fcopy_send_data(fcopy_msg, pktlen);
+	}
+
+	icmsghdr->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE;
+	ret = rte_vmbus_chan_send(txbr, 0x6, desc + offset, pktlen, 0);
+	if (ret) {
+		syslog(LOG_ERR, "Write to ringbuffer failed err: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void fcopy_get_first_folder(char *path, char *chan_no)
+{
+	DIR *dir = opendir(path);
+	struct dirent *entry;
+
+	if (!dir) {
+		syslog(LOG_ERR, "Failed to open directory (errno=%s).\n", strerror(errno));
+		return;
+	}
+
+	while ((entry = readdir(dir)) != NULL) {
+		if (entry->d_type == DT_DIR && strcmp(entry->d_name, ".") != 0 &&
+		    strcmp(entry->d_name, "..") != 0) {
+			strcpy(chan_no, entry->d_name);
+			break;
+		}
+	}
+
+	closedir(dir);
+}
+
+int main(int argc, char *argv[])
+{
+	int fcopy_fd = -1, tmp = 1;
+	int daemonize = 1, long_index = 0, opt, ret = -EINVAL;
+	struct vmbus_br txbr, rxbr;
+	void *ring;
+	uint32_t len = HV_RING_SIZE;
+	char uio_name[NAME_MAX] = {0};
+	char uio_dev_path[PATH_MAX] = {0};
+
+	static struct option long_options[] = {
+		{"help",	no_argument,	   0,  'h' },
+		{"no-daemon",	no_argument,	   0,  'n' },
+		{0,		0,		   0,  0   }
+	};
+
+	while ((opt = getopt_long(argc, argv, "hn", long_options,
+				  &long_index)) != -1) {
+		switch (opt) {
+		case 'n':
+			daemonize = 0;
+			break;
+		case 'h':
+		default:
+			print_usage(argv);
+			goto exit;
+		}
+	}
+
+	if (daemonize && daemon(1, 0)) {
+		syslog(LOG_ERR, "daemon() failed; error: %s", strerror(errno));
+		goto exit;
+	}
+
+	openlog("HV_UIO_FCOPY", 0, LOG_USER);
+	syslog(LOG_INFO, "starting; pid is:%d", getpid());
+
+	fcopy_get_first_folder(FCOPY_UIO, uio_name);
+	snprintf(uio_dev_path, sizeof(uio_dev_path), "/dev/%s", uio_name);
+	fcopy_fd = open(uio_dev_path, O_RDWR);
+
+	if (fcopy_fd < 0) {
+		syslog(LOG_ERR, "open %s failed; error: %d %s",
+		       uio_dev_path, errno, strerror(errno));
+		ret = fcopy_fd;
+		goto exit;
+	}
+
+	ring = vmbus_uio_map(&fcopy_fd, HV_RING_SIZE);
+	if (!ring) {
+		ret = errno;
+		syslog(LOG_ERR, "mmap ringbuffer failed; error: %d %s", ret, strerror(ret));
+		goto close;
+	}
+	vmbus_br_setup(&txbr, ring, HV_RING_SIZE);
+	vmbus_br_setup(&rxbr, (char *)ring + HV_RING_SIZE, HV_RING_SIZE);
+
+	rxbr.vbr->imask = 0;
+
+	while (1) {
+		/*
+		 * In this loop we process fcopy messages after the
+		 * handshake is complete.
+		 */
+		ret = pread(fcopy_fd, &tmp, sizeof(int), 0);
+		if (ret < 0) {
+			if (errno == EINTR || errno == EAGAIN)
+				continue;
+			syslog(LOG_ERR, "pread failed: %s", strerror(errno));
+			goto close;
+		}
+
+		len = HV_RING_SIZE;
+		ret = rte_vmbus_chan_recv_raw(&rxbr, desc, &len);
+		if (unlikely(ret <= 0)) {
+			/* This indicates a failure to communicate (or worse) */
+			syslog(LOG_ERR, "VMBus channel recv error: %d", ret);
+		} else {
+			ret = fcopy_pkt_process(&txbr);
+			if (ret < 0)
+				goto close;
+
+			/* Signal host */
+			if ((write(fcopy_fd, &tmp, sizeof(int))) != sizeof(int)) {
+				ret = errno;
+				syslog(LOG_ERR, "Signal to host failed: %s\n", strerror(ret));
+				goto close;
+			}
+		}
+	}
+close:
+	close(fcopy_fd);
+exit:
+	return ret;
+}
diff --git a/hyper-v.tools.hv.hv_get_dhcp_info.sh b/hyper-v.tools.hv.hv_get_dhcp_info.sh
new file mode 100644
index 0000000..a6d81e9
--- /dev/null
+++ b/hyper-v.tools.hv.hv_get_dhcp_info.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+# This script retrieves the DHCP state of a given interface.
+# In the interest of keeping the KVP daemon code free of distro specific
+# information; the kvp daemon code invokes this external script to gather
+# DHCP setting for the specific interface.
+#
+# Input: Name of the interface
+#
+# Output: The script prints the string "Enabled" to stdout to indicate
+#	that DHCP is enabled on the interface. If DHCP is not enabled,
+#	the script prints the string "Disabled" to stdout.
+#
+# Each Distro is expected to implement this script in a distro specific
+# fashion. For instance, on Distros that ship with Network Manager enabled,
+# this script can be based on the Network Manager APIs for retrieving DHCP
+# information.
+
+if_file="/etc/sysconfig/network/ifcfg-$1"
+
+dhcp=$(grep -- '^BOOTPROTO=.*dhcp' "$if_file" 2>/dev/null)
+
+if [ "$dhcp" != "" ];
+then
+echo "Enabled"
+else
+echo "Disabled"
+fi
diff --git a/hyper-v.tools.hv.hv_get_dns_info.sh b/hyper-v.tools.hv.hv_get_dns_info.sh
new file mode 100644
index 0000000..db17856
--- /dev/null
+++ b/hyper-v.tools.hv.hv_get_dns_info.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# This script parses /etc/resolv.conf to retrive DNS information.
+# In the interest of keeping the KVP daemon code free of distro specific
+# information; the kvp daemon code invokes this external script to gather
+# DNS information.
+# This script is expected to print the nameserver values to stdout.
+# Each Distro is expected to implement this script in a distro specific
+# fashion. For instance on Distros that ship with Network Manager enabled,
+# this script can be based on the Network Manager APIs for retrieving DNS
+# entries.
+
+if test -f /etc/resolv.conf
+then
+	exec awk -- '/^nameserver/ { print $2 }' /etc/resolv.conf
+fi
+exit 0
diff --git a/hyper-v.tools.hv.hv_kvp_daemon.c b/hyper-v.tools.hv.hv_kvp_daemon.c
new file mode 100644
index 0000000..8c4ed6d
--- /dev/null
+++ b/hyper-v.tools.hv.hv_kvp_daemon.c
@@ -0,0 +1,1947 @@
+/*
+ * An implementation of key value pair (KVP) functionality for Linux.
+ *
+ *
+ * Copyright (C) 2010, Novell, Inc.
+ * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+
+#include <sys/poll.h>
+#include <sys/utsname.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <arpa/inet.h>
+#include <linux/hyperv.h>
+#include <ifaddrs.h>
+#include <netdb.h>
+#include <syslog.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <net/if.h>
+#include <limits.h>
+#include <getopt.h>
+
+/*
+ * KVP protocol: The user mode component first registers with the
+ * kernel component. Subsequently, the kernel component requests, data
+ * for the specified keys. In response to this message the user mode component
+ * fills in the value corresponding to the specified key. We overload the
+ * sequence field in the cn_msg header to define our KVP message types.
+ *
+ * We use this infrastructure for also supporting queries from user mode
+ * application for state that may be maintained in the KVP kernel component.
+ *
+ */
+
+
+enum key_index {
+	FullyQualifiedDomainName = 0,
+	IntegrationServicesVersion, /*This key is serviced in the kernel*/
+	NetworkAddressIPv4,
+	NetworkAddressIPv6,
+	OSBuildNumber,
+	OSName,
+	OSMajorVersion,
+	OSMinorVersion,
+	OSVersion,
+	ProcessorArchitecture
+};
+
+
+enum {
+	IPADDR = 0,
+	NETMASK,
+	GATEWAY,
+	DNS
+};
+
+enum {
+	IPV4 = 1,
+	IPV6,
+	IP_TYPE_MAX
+};
+
+static int in_hand_shake;
+
+static char *os_name = "";
+static char *os_major = "";
+static char *os_minor = "";
+static char *processor_arch;
+static char *os_build;
+static char *os_version;
+static char *lic_version = "Unknown version";
+static char full_domain_name[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
+static struct utsname uts_buf;
+
+/*
+ * The location of the interface configuration file.
+ */
+
+#define KVP_CONFIG_LOC	"/var/lib/hyperv"
+
+#ifndef KVP_SCRIPTS_PATH
+#define KVP_SCRIPTS_PATH "/usr/libexec/hypervkvpd/"
+#endif
+
+#define KVP_NET_DIR "/sys/class/net/"
+
+#define MAX_FILE_NAME 100
+#define ENTRIES_PER_BLOCK 50
+/*
+ * Change this entry if the number of addresses increases in future
+ */
+#define MAX_IP_ENTRIES 64
+#define OUTSTR_BUF_SIZE ((INET6_ADDRSTRLEN + 1) * MAX_IP_ENTRIES)
+
+struct kvp_record {
+	char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
+	char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
+};
+
+struct kvp_file_state {
+	int fd;
+	int num_blocks;
+	struct kvp_record *records;
+	int num_records;
+	char fname[MAX_FILE_NAME];
+};
+
+static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
+
+static void kvp_acquire_lock(int pool)
+{
+	struct flock fl = {F_WRLCK, SEEK_SET, 0, 0, 0};
+	fl.l_pid = getpid();
+
+	if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
+		syslog(LOG_ERR, "Failed to acquire the lock pool: %d; error: %d %s", pool,
+				errno, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+}
+
+static void kvp_release_lock(int pool)
+{
+	struct flock fl = {F_UNLCK, SEEK_SET, 0, 0, 0};
+	fl.l_pid = getpid();
+
+	if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
+		syslog(LOG_ERR, "Failed to release the lock pool: %d; error: %d %s", pool,
+				errno, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+}
+
+static void kvp_update_file(int pool)
+{
+	FILE *filep;
+
+	/*
+	 * We are going to write our in-memory registry out to
+	 * disk; acquire the lock first.
+	 */
+	kvp_acquire_lock(pool);
+
+	filep = fopen(kvp_file_info[pool].fname, "we");
+	if (!filep) {
+		syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
+				errno, strerror(errno));
+		kvp_release_lock(pool);
+		exit(EXIT_FAILURE);
+	}
+
+	fwrite(kvp_file_info[pool].records, sizeof(struct kvp_record),
+				kvp_file_info[pool].num_records, filep);
+
+	if (ferror(filep) || fclose(filep)) {
+		kvp_release_lock(pool);
+		syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
+		exit(EXIT_FAILURE);
+	}
+
+	kvp_release_lock(pool);
+}
+
+static void kvp_update_mem_state(int pool)
+{
+	FILE *filep;
+	size_t records_read = 0;
+	struct kvp_record *record = kvp_file_info[pool].records;
+	struct kvp_record *readp;
+	int num_blocks = kvp_file_info[pool].num_blocks;
+	int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
+
+	kvp_acquire_lock(pool);
+
+	filep = fopen(kvp_file_info[pool].fname, "re");
+	if (!filep) {
+		syslog(LOG_ERR, "Failed to open file, pool: %d; error: %d %s", pool,
+				errno, strerror(errno));
+		kvp_release_lock(pool);
+		exit(EXIT_FAILURE);
+	}
+	for (;;) {
+		readp = &record[records_read];
+		records_read += fread(readp, sizeof(struct kvp_record),
+				ENTRIES_PER_BLOCK * num_blocks - records_read,
+				filep);
+
+		if (ferror(filep)) {
+			syslog(LOG_ERR,
+				"Failed to read file, pool: %d; error: %d %s",
+				 pool, errno, strerror(errno));
+			kvp_release_lock(pool);
+			exit(EXIT_FAILURE);
+		}
+
+		if (!feof(filep)) {
+			/*
+			 * We have more data to read.
+			 */
+			num_blocks++;
+			record = realloc(record, alloc_unit * num_blocks);
+
+			if (record == NULL) {
+				syslog(LOG_ERR, "malloc failed");
+				kvp_release_lock(pool);
+				exit(EXIT_FAILURE);
+			}
+			continue;
+		}
+		break;
+	}
+
+	kvp_file_info[pool].num_blocks = num_blocks;
+	kvp_file_info[pool].records = record;
+	kvp_file_info[pool].num_records = records_read;
+
+	fclose(filep);
+	kvp_release_lock(pool);
+}
+
+static int kvp_file_init(void)
+{
+	int  fd;
+	char *fname;
+	int i;
+	int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
+
+	if (access(KVP_CONFIG_LOC, F_OK)) {
+		if (mkdir(KVP_CONFIG_LOC, 0755 /* rwxr-xr-x */)) {
+			syslog(LOG_ERR, "Failed to create '%s'; error: %d %s", KVP_CONFIG_LOC,
+					errno, strerror(errno));
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	for (i = 0; i < KVP_POOL_COUNT; i++) {
+		fname = kvp_file_info[i].fname;
+		sprintf(fname, "%s/.kvp_pool_%d", KVP_CONFIG_LOC, i);
+		fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, 0644 /* rw-r--r-- */);
+
+		if (fd == -1)
+			return 1;
+
+		kvp_file_info[i].fd = fd;
+		kvp_file_info[i].num_blocks = 1;
+		kvp_file_info[i].records = malloc(alloc_unit);
+		if (kvp_file_info[i].records == NULL)
+			return 1;
+		kvp_file_info[i].num_records = 0;
+		kvp_update_mem_state(i);
+	}
+
+	return 0;
+}
+
+static int kvp_key_delete(int pool, const __u8 *key, int key_size)
+{
+	int i;
+	int j, k;
+	int num_records;
+	struct kvp_record *record;
+
+	/*
+	 * First update the in-memory state.
+	 */
+	kvp_update_mem_state(pool);
+
+	num_records = kvp_file_info[pool].num_records;
+	record = kvp_file_info[pool].records;
+
+	for (i = 0; i < num_records; i++) {
+		if (memcmp(key, record[i].key, key_size))
+			continue;
+		/*
+		 * Found a match; just move the remaining
+		 * entries up.
+		 */
+		if (i == (num_records - 1)) {
+			kvp_file_info[pool].num_records--;
+			kvp_update_file(pool);
+			return 0;
+		}
+
+		j = i;
+		k = j + 1;
+		for (; k < num_records; k++) {
+			strcpy(record[j].key, record[k].key);
+			strcpy(record[j].value, record[k].value);
+			j++;
+		}
+
+		kvp_file_info[pool].num_records--;
+		kvp_update_file(pool);
+		return 0;
+	}
+	return 1;
+}
+
+static int kvp_key_add_or_modify(int pool, const __u8 *key, int key_size,
+				 const __u8 *value, int value_size)
+{
+	int i;
+	int num_records;
+	struct kvp_record *record;
+	int num_blocks;
+
+	if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
+		(value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
+		return 1;
+
+	/*
+	 * First update the in-memory state.
+	 */
+	kvp_update_mem_state(pool);
+
+	num_records = kvp_file_info[pool].num_records;
+	record = kvp_file_info[pool].records;
+	num_blocks = kvp_file_info[pool].num_blocks;
+
+	for (i = 0; i < num_records; i++) {
+		if (memcmp(key, record[i].key, key_size))
+			continue;
+		/*
+		 * Found a match; just update the value -
+		 * this is the modify case.
+		 */
+		memcpy(record[i].value, value, value_size);
+		kvp_update_file(pool);
+		return 0;
+	}
+
+	/*
+	 * Need to add a new entry;
+	 */
+	if (num_records == (ENTRIES_PER_BLOCK * num_blocks)) {
+		/* Need to allocate a larger array for reg entries. */
+		record = realloc(record, sizeof(struct kvp_record) *
+			 ENTRIES_PER_BLOCK * (num_blocks + 1));
+
+		if (record == NULL)
+			return 1;
+		kvp_file_info[pool].num_blocks++;
+
+	}
+	memcpy(record[i].value, value, value_size);
+	memcpy(record[i].key, key, key_size);
+	kvp_file_info[pool].records = record;
+	kvp_file_info[pool].num_records++;
+	kvp_update_file(pool);
+	return 0;
+}
+
+static int kvp_get_value(int pool, const __u8 *key, int key_size, __u8 *value,
+			int value_size)
+{
+	int i;
+	int num_records;
+	struct kvp_record *record;
+
+	if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
+		(value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
+		return 1;
+
+	/*
+	 * First update the in-memory state.
+	 */
+	kvp_update_mem_state(pool);
+
+	num_records = kvp_file_info[pool].num_records;
+	record = kvp_file_info[pool].records;
+
+	for (i = 0; i < num_records; i++) {
+		if (memcmp(key, record[i].key, key_size))
+			continue;
+		/*
+		 * Found a match; just copy the value out.
+		 */
+		memcpy(value, record[i].value, value_size);
+		return 0;
+	}
+
+	return 1;
+}
+
+static int kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
+				__u8 *value, int value_size)
+{
+	struct kvp_record *record;
+
+	/*
+	 * First update our in-memory database.
+	 */
+	kvp_update_mem_state(pool);
+	record = kvp_file_info[pool].records;
+
+	if (index >= kvp_file_info[pool].num_records) {
+		return 1;
+	}
+
+	memcpy(key, record[index].key, key_size);
+	memcpy(value, record[index].value, value_size);
+	return 0;
+}
+
+
+void kvp_get_os_info(void)
+{
+	FILE	*file;
+	char	*p, buf[512];
+
+	uname(&uts_buf);
+	os_version = uts_buf.release;
+	os_build = strdup(uts_buf.release);
+
+	os_name = uts_buf.sysname;
+	processor_arch = uts_buf.machine;
+
+	/*
+	 * The current windows host (win7) expects the build
+	 * string to be of the form: x.y.z
+	 * Strip additional information we may have.
+	 */
+	p = strchr(os_version, '-');
+	if (p)
+		*p = '\0';
+
+	/*
+	 * Parse the /etc/os-release file if present:
+	 * https://www.freedesktop.org/software/systemd/man/os-release.html
+	 */
+	file = fopen("/etc/os-release", "r");
+	if (file != NULL) {
+		while (fgets(buf, sizeof(buf), file)) {
+			char *value, *q;
+
+			/* Ignore comments */
+			if (buf[0] == '#')
+				continue;
+
+			/* Split into name=value */
+			p = strchr(buf, '=');
+			if (!p)
+				continue;
+			*p++ = 0;
+
+			/* Remove quotes and newline; un-escape */
+			value = p;
+			q = p;
+			while (*p) {
+				if (*p == '\\') {
+					++p;
+					if (!*p)
+						break;
+					*q++ = *p++;
+				} else if (*p == '\'' || *p == '"' ||
+					   *p == '\n') {
+					++p;
+				} else {
+					*q++ = *p++;
+				}
+			}
+			*q = 0;
+
+			if (!strcmp(buf, "NAME")) {
+				p = strdup(value);
+				if (!p)
+					break;
+				os_name = p;
+			} else if (!strcmp(buf, "VERSION_ID")) {
+				p = strdup(value);
+				if (!p)
+					break;
+				os_major = p;
+			}
+		}
+		fclose(file);
+		return;
+	}
+
+	/* Fallback for older RH/SUSE releases */
+	file = fopen("/etc/SuSE-release", "r");
+	if (file != NULL)
+		goto kvp_osinfo_found;
+	file  = fopen("/etc/redhat-release", "r");
+	if (file != NULL)
+		goto kvp_osinfo_found;
+
+	/*
+	 * We don't have information about the os.
+	 */
+	return;
+
+kvp_osinfo_found:
+	/* up to three lines */
+	p = fgets(buf, sizeof(buf), file);
+	if (p) {
+		p = strchr(buf, '\n');
+		if (p)
+			*p = '\0';
+		p = strdup(buf);
+		if (!p)
+			goto done;
+		os_name = p;
+
+		/* second line */
+		p = fgets(buf, sizeof(buf), file);
+		if (p) {
+			p = strchr(buf, '\n');
+			if (p)
+				*p = '\0';
+			p = strdup(buf);
+			if (!p)
+				goto done;
+			os_major = p;
+
+			/* third line */
+			p = fgets(buf, sizeof(buf), file);
+			if (p)  {
+				p = strchr(buf, '\n');
+				if (p)
+					*p = '\0';
+				p = strdup(buf);
+				if (p)
+					os_minor = p;
+			}
+		}
+	}
+
+done:
+	fclose(file);
+	return;
+}
+
+
+
+/*
+ * Retrieve an interface name corresponding to the specified guid.
+ * If there is a match, the function returns a pointer
+ * to the interface name and if not, a NULL is returned.
+ * If a match is found, the caller is responsible for
+ * freeing the memory.
+ */
+
+static char *kvp_get_if_name(char *guid)
+{
+	DIR *dir;
+	struct dirent *entry;
+	FILE    *file;
+	char    *p, *x;
+	char    *if_name = NULL;
+	char    buf[256];
+	char dev_id[PATH_MAX];
+
+	dir = opendir(KVP_NET_DIR);
+	if (dir == NULL)
+		return NULL;
+
+	while ((entry = readdir(dir)) != NULL) {
+		/*
+		 * Set the state for the next pass.
+		 */
+		snprintf(dev_id, sizeof(dev_id), "%s%s/device/device_id",
+			 KVP_NET_DIR, entry->d_name);
+
+		file = fopen(dev_id, "r");
+		if (file == NULL)
+			continue;
+
+		p = fgets(buf, sizeof(buf), file);
+		if (p) {
+			x = strchr(p, '\n');
+			if (x)
+				*x = '\0';
+
+			if (!strcmp(p, guid)) {
+				/*
+				 * Found the guid match; return the interface
+				 * name. The caller will free the memory.
+				 */
+				if_name = strdup(entry->d_name);
+				fclose(file);
+				break;
+			}
+		}
+		fclose(file);
+	}
+
+	closedir(dir);
+	return if_name;
+}
+
+/*
+ * Retrieve the MAC address given the interface name.
+ */
+
+static char *kvp_if_name_to_mac(char *if_name)
+{
+	FILE    *file;
+	char    *p, *x;
+	char    buf[256];
+	char addr_file[PATH_MAX];
+	unsigned int i;
+	char *mac_addr = NULL;
+
+	snprintf(addr_file, sizeof(addr_file), "%s%s%s", KVP_NET_DIR,
+		 if_name, "/address");
+
+	file = fopen(addr_file, "r");
+	if (file == NULL)
+		return NULL;
+
+	p = fgets(buf, sizeof(buf), file);
+	if (p) {
+		x = strchr(p, '\n');
+		if (x)
+			*x = '\0';
+		for (i = 0; i < strlen(p); i++)
+			p[i] = toupper(p[i]);
+		mac_addr = strdup(p);
+	}
+
+	fclose(file);
+	return mac_addr;
+}
+
+static void kvp_process_ipconfig_file(char *cmd,
+					char *config_buf, unsigned int len,
+					int element_size, int offset)
+{
+	char buf[256];
+	char *p;
+	char *x;
+	FILE *file;
+
+	/*
+	 * First execute the command.
+	 */
+	file = popen(cmd, "r");
+	if (file == NULL)
+		return;
+
+	if (offset == 0)
+		memset(config_buf, 0, len);
+	while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
+		if (len < strlen(config_buf) + element_size + 1)
+			break;
+
+		x = strchr(p, '\n');
+		if (x)
+			*x = '\0';
+
+		strcat(config_buf, p);
+		strcat(config_buf, ";");
+	}
+	pclose(file);
+}
+
+static void kvp_get_ipconfig_info(char *if_name,
+				 struct hv_kvp_ipaddr_value *buffer)
+{
+	char cmd[512];
+	char dhcp_info[128];
+	char *p;
+	FILE *file;
+
+	/*
+	 * Get the address of default gateway (ipv4).
+	 */
+	sprintf(cmd, "%s %s", "ip route show dev", if_name);
+	strcat(cmd, " | awk '/default/ {print $3 }'");
+
+	/*
+	 * Execute the command to gather gateway info.
+	 */
+	kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
+				(MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
+
+	/*
+	 * Get the address of default gateway (ipv6).
+	 */
+	sprintf(cmd, "%s %s", "ip -f inet6  route show dev", if_name);
+	strcat(cmd, " | awk '/default/ {print $3 }'");
+
+	/*
+	 * Execute the command to gather gateway info (ipv6).
+	 */
+	kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
+				(MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
+
+
+	/*
+	 * Gather the DNS state.
+	 * Since there is no standard way to get this information
+	 * across various distributions of interest; we just invoke
+	 * an external script that needs to be ported across distros
+	 * of interest.
+	 *
+	 * Following is the expected format of the information from the script:
+	 *
+	 * ipaddr1 (nameserver1)
+	 * ipaddr2 (nameserver2)
+	 * .
+	 * .
+	 */
+
+	sprintf(cmd, "exec %s %s", KVP_SCRIPTS_PATH "hv_get_dns_info", if_name);
+
+	/*
+	 * Execute the command to gather DNS info.
+	 */
+	kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
+				(MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
+
+	/*
+	 * Gather the DHCP state.
+	 * We will gather this state by invoking an external script.
+	 * The parameter to the script is the interface name.
+	 * Here is the expected output:
+	 *
+	 * Enabled: DHCP enabled.
+	 */
+
+	sprintf(cmd, "exec %s %s", KVP_SCRIPTS_PATH "hv_get_dhcp_info", if_name);
+
+	file = popen(cmd, "r");
+	if (file == NULL)
+		return;
+
+	p = fgets(dhcp_info, sizeof(dhcp_info), file);
+	if (p == NULL) {
+		pclose(file);
+		return;
+	}
+
+	if (!strncmp(p, "Enabled", 7))
+		buffer->dhcp_enabled = 1;
+	else
+		buffer->dhcp_enabled = 0;
+
+	pclose(file);
+}
+
+
+static unsigned int hweight32(unsigned int *w)
+{
+	unsigned int res = *w - ((*w >> 1) & 0x55555555);
+	res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
+	res = (res + (res >> 4)) & 0x0F0F0F0F;
+	res = res + (res >> 8);
+	return (res + (res >> 16)) & 0x000000FF;
+}
+
+static int kvp_process_ip_address(void *addrp,
+				int family, char *buffer,
+				int length,  int *offset)
+{
+	struct sockaddr_in *addr;
+	struct sockaddr_in6 *addr6;
+	int addr_length;
+	char tmp[50];
+	const char *str;
+
+	if (family == AF_INET) {
+		addr = addrp;
+		str = inet_ntop(family, &addr->sin_addr, tmp, 50);
+		addr_length = INET_ADDRSTRLEN;
+	} else {
+		addr6 = addrp;
+		str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
+		addr_length = INET6_ADDRSTRLEN;
+	}
+
+	if ((length - *offset) < addr_length + 2)
+		return HV_E_FAIL;
+	if (str == NULL) {
+		strcpy(buffer, "inet_ntop failed\n");
+		return HV_E_FAIL;
+	}
+	if (*offset == 0)
+		strcpy(buffer, tmp);
+	else {
+		strcat(buffer, ";");
+		strcat(buffer, tmp);
+	}
+
+	*offset += strlen(str) + 1;
+
+	return 0;
+}
+
+static int
+kvp_get_ip_info(int family, char *if_name, int op,
+		 void  *out_buffer, unsigned int length)
+{
+	struct ifaddrs *ifap;
+	struct ifaddrs *curp;
+	int offset = 0;
+	int sn_offset = 0;
+	int error = 0;
+	char *buffer;
+	struct hv_kvp_ipaddr_value *ip_buffer = NULL;
+	char cidr_mask[5]; /* /xyz */
+	int weight;
+	int i;
+	unsigned int *w;
+	char *sn_str;
+	struct sockaddr_in6 *addr6;
+
+	if (op == KVP_OP_ENUMERATE) {
+		buffer = out_buffer;
+	} else {
+		ip_buffer = out_buffer;
+		buffer = (char *)ip_buffer->ip_addr;
+		ip_buffer->addr_family = 0;
+	}
+	/*
+	 * On entry into this function, the buffer is capable of holding the
+	 * maximum key value.
+	 */
+
+	if (getifaddrs(&ifap)) {
+		strcpy(buffer, "getifaddrs failed\n");
+		return HV_E_FAIL;
+	}
+
+	curp = ifap;
+	while (curp != NULL) {
+		if (curp->ifa_addr == NULL) {
+			curp = curp->ifa_next;
+			continue;
+		}
+
+		if ((if_name != NULL) &&
+			(strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
+			/*
+			 * We want info about a specific interface;
+			 * just continue.
+			 */
+			curp = curp->ifa_next;
+			continue;
+		}
+
+		/*
+		 * We only support two address families: AF_INET and AF_INET6.
+		 * If a family value of 0 is specified, we collect both
+		 * supported address families; if not we gather info on
+		 * the specified address family.
+		 */
+		if ((((family != 0) &&
+			 (curp->ifa_addr->sa_family != family))) ||
+			 (curp->ifa_flags & IFF_LOOPBACK)) {
+			curp = curp->ifa_next;
+			continue;
+		}
+		if ((curp->ifa_addr->sa_family != AF_INET) &&
+			(curp->ifa_addr->sa_family != AF_INET6)) {
+			curp = curp->ifa_next;
+			continue;
+		}
+
+		if (op == KVP_OP_GET_IP_INFO) {
+			/*
+			 * Gather info other than the IP address.
+			 * IP address info will be gathered later.
+			 */
+			if (curp->ifa_addr->sa_family == AF_INET) {
+				ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
+				/*
+				 * Get subnet info.
+				 */
+				error = kvp_process_ip_address(
+							     curp->ifa_netmask,
+							     AF_INET,
+							     (char *)
+							     ip_buffer->sub_net,
+							     length,
+							     &sn_offset);
+				if (error)
+					goto gather_ipaddr;
+			} else {
+				ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
+
+				/*
+				 * Get subnet info in CIDR format.
+				 */
+				weight = 0;
+				sn_str = (char *)ip_buffer->sub_net;
+				addr6 = (struct sockaddr_in6 *)
+					curp->ifa_netmask;
+				w = addr6->sin6_addr.s6_addr32;
+
+				for (i = 0; i < 4; i++)
+					weight += hweight32(&w[i]);
+
+				sprintf(cidr_mask, "/%d", weight);
+				if (length < sn_offset + strlen(cidr_mask) + 1)
+					goto gather_ipaddr;
+
+				if (sn_offset == 0)
+					strcpy(sn_str, cidr_mask);
+				else {
+					strcat((char *)ip_buffer->sub_net, ";");
+					strcat(sn_str, cidr_mask);
+				}
+				sn_offset += strlen(sn_str) + 1;
+			}
+
+			/*
+			 * Collect other ip related configuration info.
+			 */
+
+			kvp_get_ipconfig_info(if_name, ip_buffer);
+		}
+
+gather_ipaddr:
+		error = kvp_process_ip_address(curp->ifa_addr,
+						curp->ifa_addr->sa_family,
+						buffer,
+						length, &offset);
+		if (error)
+			goto getaddr_done;
+
+		curp = curp->ifa_next;
+	}
+
+getaddr_done:
+	freeifaddrs(ifap);
+	return error;
+}
+
+/*
+ * Retrieve the IP given the MAC address.
+ */
+static int kvp_mac_to_ip(struct hv_kvp_ipaddr_value *kvp_ip_val)
+{
+	char *mac = (char *)kvp_ip_val->adapter_id;
+	DIR *dir;
+	struct dirent *entry;
+	FILE    *file;
+	char    *p, *x;
+	char    *if_name = NULL;
+	char    buf[256];
+	char dev_id[PATH_MAX];
+	unsigned int i;
+	int error = HV_E_FAIL;
+
+	dir = opendir(KVP_NET_DIR);
+	if (dir == NULL)
+		return HV_E_FAIL;
+
+	while ((entry = readdir(dir)) != NULL) {
+		/*
+		 * Set the state for the next pass.
+		 */
+		snprintf(dev_id, sizeof(dev_id), "%s%s/address", KVP_NET_DIR,
+			 entry->d_name);
+
+		file = fopen(dev_id, "r");
+		if (file == NULL)
+			continue;
+
+		p = fgets(buf, sizeof(buf), file);
+		fclose(file);
+		if (!p)
+			continue;
+
+		x = strchr(p, '\n');
+		if (x)
+			*x = '\0';
+
+		for (i = 0; i < strlen(p); i++)
+			p[i] = toupper(p[i]);
+
+		if (strcmp(p, mac))
+			continue;
+
+		/*
+		 * Found the MAC match.
+		 * A NIC (e.g. VF) matching the MAC, but without IP, is skipped.
+		 */
+		if_name = entry->d_name;
+		if (!if_name)
+			continue;
+
+		error = kvp_get_ip_info(0, if_name, KVP_OP_GET_IP_INFO,
+					kvp_ip_val, MAX_IP_ADDR_SIZE * 2);
+
+		if (!error && strlen((char *)kvp_ip_val->ip_addr))
+			break;
+	}
+
+	closedir(dir);
+	return error;
+}
+
+static int expand_ipv6(char *addr, int type)
+{
+	int ret;
+	struct in6_addr v6_addr;
+
+	ret = inet_pton(AF_INET6, addr, &v6_addr);
+
+	if (ret != 1) {
+		if (type == NETMASK)
+			return 1;
+		return 0;
+	}
+
+	sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
+		"%02x%02x:%02x%02x:%02x%02x",
+		(int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
+		(int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
+		(int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
+		(int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
+		(int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
+		(int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
+		(int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
+		(int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
+
+	return 1;
+
+}
+
+static int is_ipv4(char *addr)
+{
+	int ret;
+	struct in_addr ipv4_addr;
+
+	ret = inet_pton(AF_INET, addr, &ipv4_addr);
+
+	if (ret == 1)
+		return 1;
+	return 0;
+}
+
+static int parse_ip_val_buffer(char *in_buf, int *offset,
+				char *out_buf, int out_len)
+{
+	char *x;
+	char *start;
+
+	/*
+	 * in_buf has sequence of characters that are separated by
+	 * the character ';'. The last sequence does not have the
+	 * terminating ";" character.
+	 */
+	start = in_buf + *offset;
+
+	x = strchr(start, ';');
+	if (x)
+		*x = 0;
+	else
+		x = start + strlen(start);
+
+	if (strlen(start) != 0) {
+		int i = 0;
+		/*
+		 * Get rid of leading spaces.
+		 */
+		while (start[i] == ' ')
+			i++;
+
+		if ((x - start) <= out_len) {
+			strcpy(out_buf, (start + i));
+			*offset += (x - start) + 1;
+			return 1;
+		}
+	}
+	return 0;
+}
+
+static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
+{
+	int ret;
+
+	ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
+
+	if (ret < 0)
+		return HV_E_FAIL;
+
+	return 0;
+}
+
+
+static int process_ip_string(FILE *f, char *ip_string, int type)
+{
+	int error = 0;
+	char addr[INET6_ADDRSTRLEN];
+	int i = 0;
+	int j = 0;
+	char str[256];
+	char sub_str[13];
+	int offset = 0;
+
+	memset(addr, 0, sizeof(addr));
+
+	while (parse_ip_val_buffer(ip_string, &offset, addr,
+					(MAX_IP_ADDR_SIZE * 2))) {
+
+		sub_str[0] = 0;
+		if (is_ipv4(addr)) {
+			switch (type) {
+			case IPADDR:
+				snprintf(str, sizeof(str), "%s", "IPADDR");
+				break;
+			case NETMASK:
+				snprintf(str, sizeof(str), "%s", "NETMASK");
+				break;
+			case GATEWAY:
+				snprintf(str, sizeof(str), "%s", "GATEWAY");
+				break;
+			case DNS:
+				snprintf(str, sizeof(str), "%s", "DNS");
+				break;
+			}
+
+			if (type == DNS) {
+				snprintf(sub_str, sizeof(sub_str), "%d", ++i);
+			} else if (type == GATEWAY && i == 0) {
+				++i;
+			} else {
+				snprintf(sub_str, sizeof(sub_str), "%d", i++);
+			}
+
+
+		} else if (expand_ipv6(addr, type)) {
+			switch (type) {
+			case IPADDR:
+				snprintf(str, sizeof(str), "%s", "IPV6ADDR");
+				break;
+			case NETMASK:
+				snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
+				break;
+			case GATEWAY:
+				snprintf(str, sizeof(str), "%s",
+					"IPV6_DEFAULTGW");
+				break;
+			case DNS:
+				snprintf(str, sizeof(str), "%s",  "DNS");
+				break;
+			}
+
+			if (type == DNS) {
+				snprintf(sub_str, sizeof(sub_str), "%d", ++i);
+			} else if (j == 0) {
+				++j;
+			} else {
+				snprintf(sub_str, sizeof(sub_str), "_%d", j++);
+			}
+		} else {
+			return  HV_INVALIDARG;
+		}
+
+		error = kvp_write_file(f, str, sub_str, addr);
+		if (error)
+			return error;
+		memset(addr, 0, sizeof(addr));
+	}
+
+	return 0;
+}
+
+int ip_version_check(const char *input_addr)
+{
+	struct in6_addr addr;
+
+	if (inet_pton(AF_INET, input_addr, &addr))
+		return IPV4;
+	else if (inet_pton(AF_INET6, input_addr, &addr))
+		return IPV6;
+
+	return -EINVAL;
+}
+
+/*
+ * Only IPv4 subnet strings needs to be converted to plen
+ * For IPv6 the subnet is already privided in plen format
+ */
+static int kvp_subnet_to_plen(char *subnet_addr_str)
+{
+	int plen = 0;
+	struct in_addr subnet_addr4;
+
+	/*
+	 * Convert subnet address to binary representation
+	 */
+	if (inet_pton(AF_INET, subnet_addr_str, &subnet_addr4) == 1) {
+		uint32_t subnet_mask = ntohl(subnet_addr4.s_addr);
+
+		while (subnet_mask & 0x80000000) {
+			plen++;
+			subnet_mask <<= 1;
+		}
+	} else {
+		return -1;
+	}
+
+	return plen;
+}
+
+static int process_dns_gateway_nm(FILE *f, char *ip_string, int type,
+				  int ip_sec)
+{
+	char addr[INET6_ADDRSTRLEN], *output_str;
+	int ip_offset = 0, error = 0, ip_ver;
+	char *param_name;
+
+	if (type == DNS)
+		param_name = "dns";
+	else if (type == GATEWAY)
+		param_name = "gateway";
+	else
+		return -EINVAL;
+
+	output_str = (char *)calloc(OUTSTR_BUF_SIZE, sizeof(char));
+	if (!output_str)
+		return -ENOMEM;
+
+	while (1) {
+		memset(addr, 0, sizeof(addr));
+
+		if (!parse_ip_val_buffer(ip_string, &ip_offset, addr,
+					 (MAX_IP_ADDR_SIZE * 2)))
+			break;
+
+		ip_ver = ip_version_check(addr);
+		if (ip_ver < 0)
+			continue;
+
+		if ((ip_ver == IPV4 && ip_sec == IPV4) ||
+		    (ip_ver == IPV6 && ip_sec == IPV6)) {
+			/*
+			 * do a bound check to avoid out-of bound writes
+			 */
+			if ((OUTSTR_BUF_SIZE - strlen(output_str)) >
+			    (strlen(addr) + 1)) {
+				strncat(output_str, addr,
+					OUTSTR_BUF_SIZE -
+					strlen(output_str) - 1);
+				strncat(output_str, ",",
+					OUTSTR_BUF_SIZE -
+					strlen(output_str) - 1);
+			}
+		} else {
+			continue;
+		}
+	}
+
+	if (strlen(output_str)) {
+		/*
+		 * This is to get rid of that extra comma character
+		 * in the end of the string
+		 */
+		output_str[strlen(output_str) - 1] = '\0';
+		error = fprintf(f, "%s=%s\n", param_name, output_str);
+	}
+
+	free(output_str);
+	return error;
+}
+
+static int process_ip_string_nm(FILE *f, char *ip_string, char *subnet,
+				int ip_sec)
+{
+	char addr[INET6_ADDRSTRLEN];
+	char subnet_addr[INET6_ADDRSTRLEN];
+	int error = 0, i = 0;
+	int ip_offset = 0, subnet_offset = 0;
+	int plen, ip_ver;
+
+	memset(addr, 0, sizeof(addr));
+	memset(subnet_addr, 0, sizeof(subnet_addr));
+
+	while (parse_ip_val_buffer(ip_string, &ip_offset, addr,
+				   (MAX_IP_ADDR_SIZE * 2)) &&
+				   parse_ip_val_buffer(subnet,
+						       &subnet_offset,
+						       subnet_addr,
+						       (MAX_IP_ADDR_SIZE *
+							2))) {
+		ip_ver = ip_version_check(addr);
+		if (ip_ver < 0)
+			continue;
+
+		if (ip_ver == IPV4 && ip_sec == IPV4)
+			plen = kvp_subnet_to_plen((char *)subnet_addr);
+		else if (ip_ver == IPV6 && ip_sec == IPV6)
+			plen = atoi(subnet_addr);
+		else
+			continue;
+
+		if (plen < 0)
+			return plen;
+
+		error = fprintf(f, "address%d=%s/%d\n", ++i, (char *)addr,
+				plen);
+		if (error < 0)
+			return error;
+
+		memset(addr, 0, sizeof(addr));
+		memset(subnet_addr, 0, sizeof(subnet_addr));
+	}
+
+	return error;
+}
+
+static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
+{
+	int error = 0, ip_ver;
+	char if_filename[PATH_MAX];
+	char nm_filename[PATH_MAX];
+	FILE *ifcfg_file, *nmfile;
+	char cmd[PATH_MAX];
+	char *mac_addr;
+	int str_len;
+
+	/*
+	 * Set the configuration for the specified interface with
+	 * the information provided. Since there is no standard
+	 * way to configure an interface, we will have an external
+	 * script that does the job of configuring the interface and
+	 * flushing the configuration.
+	 *
+	 * The parameters passed to this external script are:
+	 * 1. A configuration file that has the specified configuration.
+	 *
+	 * We will embed the name of the interface in the configuration
+	 * file: ifcfg-ethx (where ethx is the interface name).
+	 *
+	 * The information provided here may be more than what is needed
+	 * in a given distro to configure the interface and so are free
+	 * ignore information that may not be relevant.
+	 *
+	 * Here is the ifcfg format of the ip configuration file:
+	 *
+	 * HWADDR=macaddr
+	 * DEVICE=interface name
+	 * BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
+	 *                       or "none" if no boot-time protocol should be used)
+	 *
+	 * IPADDR0=ipaddr1
+	 * IPADDR1=ipaddr2
+	 * IPADDRx=ipaddry (where y = x + 1)
+	 *
+	 * NETMASK0=netmask1
+	 * NETMASKx=netmasky (where y = x + 1)
+	 *
+	 * GATEWAY=ipaddr1
+	 * GATEWAYx=ipaddry (where y = x + 1)
+	 *
+	 * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
+	 *
+	 * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
+	 * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
+	 * IPV6NETMASK.
+	 *
+	 * Here is the keyfile format of the ip configuration file:
+	 *
+	 * [ethernet]
+	 * mac-address=macaddr
+	 * [connection]
+	 * interface-name=interface name
+	 *
+	 * [ipv4]
+	 * method=<protocol> (where <protocol> is "auto" if DHCP is configured
+	 *                       or "manual" if no boot-time protocol should be used)
+	 *
+	 * address1=ipaddr1/plen
+	 * address2=ipaddr2/plen
+	 *
+	 * gateway=gateway1;gateway2
+	 *
+	 * dns=dns1;dns2
+	 *
+	 * [ipv6]
+	 * address1=ipaddr1/plen
+	 * address2=ipaddr2/plen
+	 *
+	 * gateway=gateway1;gateway2
+	 *
+	 * dns=dns1;dns2
+	 *
+	 * The host can specify multiple ipv4 and ipv6 addresses to be
+	 * configured for the interface. Furthermore, the configuration
+	 * needs to be persistent. A subsequent GET call on the interface
+	 * is expected to return the configuration that is set via the SET
+	 * call.
+	 */
+
+	/*
+	 * We are populating both ifcfg and nmconnection files
+	 */
+	snprintf(if_filename, sizeof(if_filename), "%s%s%s", KVP_CONFIG_LOC,
+		 "/ifcfg-", if_name);
+
+	ifcfg_file = fopen(if_filename, "w");
+
+	if (!ifcfg_file) {
+		syslog(LOG_ERR, "Failed to open config file; error: %d %s",
+		       errno, strerror(errno));
+		return HV_E_FAIL;
+	}
+
+	snprintf(nm_filename, sizeof(nm_filename), "%s%s%s%s", KVP_CONFIG_LOC,
+		 "/", if_name, ".nmconnection");
+
+	nmfile = fopen(nm_filename, "w");
+
+	if (!nmfile) {
+		syslog(LOG_ERR, "Failed to open config file; error: %d %s",
+		       errno, strerror(errno));
+		fclose(ifcfg_file);
+		return HV_E_FAIL;
+	}
+
+	/*
+	 * First write out the MAC address.
+	 */
+
+	mac_addr = kvp_if_name_to_mac(if_name);
+	if (mac_addr == NULL) {
+		error = HV_E_FAIL;
+		goto setval_error;
+	}
+
+	error = kvp_write_file(ifcfg_file, "HWADDR", "", mac_addr);
+	if (error < 0)
+		goto setmac_error;
+
+	error = kvp_write_file(ifcfg_file, "DEVICE", "", if_name);
+	if (error < 0)
+		goto setmac_error;
+
+	error = fprintf(nmfile, "\n[connection]\n");
+	if (error < 0)
+		goto setmac_error;
+
+	error = kvp_write_file(nmfile, "interface-name", "", if_name);
+	if (error)
+		goto setmac_error;
+
+	error = fprintf(nmfile, "\n[ethernet]\n");
+	if (error < 0)
+		goto setmac_error;
+
+	error = kvp_write_file(nmfile, "mac-address", "", mac_addr);
+	if (error)
+		goto setmac_error;
+
+	free(mac_addr);
+
+	/*
+	 * The dhcp_enabled flag is only for IPv4. In the case the host only
+	 * injects an IPv6 address, the flag is true, but we still need to
+	 * proceed to parse and pass the IPv6 information to the
+	 * disto-specific script hv_set_ifconfig.
+	 */
+
+	/*
+	 * First populate the ifcfg file format
+	 */
+	if (new_val->dhcp_enabled) {
+		error = kvp_write_file(ifcfg_file, "BOOTPROTO", "", "dhcp");
+		if (error)
+			goto setval_error;
+	} else {
+		error = kvp_write_file(ifcfg_file, "BOOTPROTO", "", "none");
+		if (error)
+			goto setval_error;
+	}
+
+	error = process_ip_string(ifcfg_file, (char *)new_val->ip_addr,
+				  IPADDR);
+	if (error)
+		goto setval_error;
+
+	error = process_ip_string(ifcfg_file, (char *)new_val->sub_net,
+				  NETMASK);
+	if (error)
+		goto setval_error;
+
+	error = process_ip_string(ifcfg_file, (char *)new_val->gate_way,
+				  GATEWAY);
+	if (error)
+		goto setval_error;
+
+	error = process_ip_string(ifcfg_file, (char *)new_val->dns_addr, DNS);
+	if (error)
+		goto setval_error;
+
+	/*
+	 * Now we populate the keyfile format
+	 *
+	 * The keyfile format expects the IPv6 and IPv4 configuration in
+	 * different sections. Therefore we iterate through the list twice,
+	 * once to populate the IPv4 section and the next time for IPv6
+	 */
+	ip_ver = IPV4;
+	do {
+		if (ip_ver == IPV4) {
+			error = fprintf(nmfile, "\n[ipv4]\n");
+			if (error < 0)
+				goto setval_error;
+		} else {
+			error = fprintf(nmfile, "\n[ipv6]\n");
+			if (error < 0)
+				goto setval_error;
+		}
+
+		/*
+		 * Write the configuration for ipaddress, netmask, gateway and
+		 * name services
+		 */
+		error = process_ip_string_nm(nmfile, (char *)new_val->ip_addr,
+					     (char *)new_val->sub_net,
+					     ip_ver);
+		if (error < 0)
+			goto setval_error;
+
+		/*
+		 * As dhcp_enabled is only valid for ipv4, we do not set dhcp
+		 * methods for ipv6 based on dhcp_enabled flag.
+		 *
+		 * For ipv4, set method to manual only when dhcp_enabled is
+		 * false and specific ipv4 addresses are configured. If neither
+		 * dhcp_enabled is true and no ipv4 addresses are configured,
+		 * set method to 'disabled'.
+		 *
+		 * For ipv6, set method to manual when we configure ipv6
+		 * addresses. Otherwise set method to 'auto' so that SLAAC from
+		 * RA may be used.
+		 */
+		if (ip_ver == IPV4) {
+			if (new_val->dhcp_enabled) {
+				error = kvp_write_file(nmfile, "method", "",
+						       "auto");
+				if (error < 0)
+					goto setval_error;
+			} else if (error) {
+				error = kvp_write_file(nmfile, "method", "",
+						       "manual");
+				if (error < 0)
+					goto setval_error;
+			} else {
+				error = kvp_write_file(nmfile, "method", "",
+						       "disabled");
+				if (error < 0)
+					goto setval_error;
+			}
+		} else if (ip_ver == IPV6) {
+			if (error) {
+				error = kvp_write_file(nmfile, "method", "",
+						       "manual");
+				if (error < 0)
+					goto setval_error;
+			} else {
+				error = kvp_write_file(nmfile, "method", "",
+						       "auto");
+				if (error < 0)
+					goto setval_error;
+			}
+		}
+
+		error = process_dns_gateway_nm(nmfile,
+					       (char *)new_val->gate_way,
+					       GATEWAY, ip_ver);
+		if (error < 0)
+			goto setval_error;
+
+		error = process_dns_gateway_nm(nmfile,
+					       (char *)new_val->dns_addr, DNS,
+					       ip_ver);
+		if (error < 0)
+			goto setval_error;
+
+		ip_ver++;
+	} while (ip_ver < IP_TYPE_MAX);
+
+	fclose(nmfile);
+	fclose(ifcfg_file);
+
+	/*
+	 * Now that we have populated the configuration file,
+	 * invoke the external script to do its magic.
+	 */
+
+	str_len = snprintf(cmd, sizeof(cmd), "exec %s %s %s",
+			   KVP_SCRIPTS_PATH "hv_set_ifconfig",
+			   if_filename, nm_filename);
+	/*
+	 * This is a little overcautious, but it's necessary to suppress some
+	 * false warnings from gcc 8.0.1.
+	 */
+	if (str_len <= 0 || (unsigned int)str_len >= sizeof(cmd)) {
+		syslog(LOG_ERR, "Cmd '%s' (len=%d) may be too long",
+		       cmd, str_len);
+		return HV_E_FAIL;
+	}
+
+	if (system(cmd)) {
+		syslog(LOG_ERR, "Failed to execute cmd '%s'; error: %d %s",
+				cmd, errno, strerror(errno));
+		return HV_E_FAIL;
+	}
+	return 0;
+
+setmac_error:
+	free(mac_addr);
+setval_error:
+	syslog(LOG_ERR, "Failed to write config file. error: %d %s",
+		errno, strerror(errno));
+	fclose(ifcfg_file);
+	fclose(nmfile);
+	return error;
+}
+
+
+static void
+kvp_get_domain_name(char *buffer, int length)
+{
+	struct addrinfo	hints, *info ;
+	int error = 0;
+
+	gethostname(buffer, length);
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family = AF_INET; /*Get only ipv4 addrinfo. */
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_flags = AI_CANONNAME;
+
+	error = getaddrinfo(buffer, NULL, &hints, &info);
+	if (error != 0) {
+		snprintf(buffer, length, "getaddrinfo failed: 0x%x %s",
+			error, gai_strerror(error));
+		return;
+	}
+	snprintf(buffer, length, "%s", info->ai_canonname);
+	freeaddrinfo(info);
+}
+
+void print_usage(char *argv[])
+{
+	fprintf(stderr, "Usage: %s [options]\n"
+		"Options are:\n"
+		"  -n, --no-daemon        stay in foreground, don't daemonize\n"
+		"  -h, --help             print this help\n", argv[0]);
+}
+
+int main(int argc, char *argv[])
+{
+	int kvp_fd = -1, len;
+	int error;
+	struct pollfd pfd;
+	char    *p;
+	struct hv_kvp_msg hv_msg[1];
+	char	*key_value;
+	char	*key_name;
+	int	op;
+	int	pool;
+	char	*if_name;
+	struct hv_kvp_ipaddr_value *kvp_ip_val;
+	int daemonize = 1, long_index = 0, opt;
+
+	static struct option long_options[] = {
+		{"help",	no_argument,	   0,  'h' },
+		{"no-daemon",	no_argument,	   0,  'n' },
+		{0,		0,		   0,  0   }
+	};
+
+	while ((opt = getopt_long(argc, argv, "hn", long_options,
+				  &long_index)) != -1) {
+		switch (opt) {
+		case 'n':
+			daemonize = 0;
+			break;
+		case 'h':
+			print_usage(argv);
+			exit(0);
+		default:
+			print_usage(argv);
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	if (daemonize && daemon(1, 0))
+		return 1;
+
+	openlog("KVP", 0, LOG_USER);
+	syslog(LOG_INFO, "KVP starting; pid is:%d", getpid());
+
+	/*
+	 * Retrieve OS release information.
+	 */
+	kvp_get_os_info();
+	/*
+	 * Cache Fully Qualified Domain Name because getaddrinfo takes an
+	 * unpredictable amount of time to finish.
+	 */
+	kvp_get_domain_name(full_domain_name, sizeof(full_domain_name));
+
+	if (kvp_file_init()) {
+		syslog(LOG_ERR, "Failed to initialize the pools");
+		exit(EXIT_FAILURE);
+	}
+
+reopen_kvp_fd:
+	if (kvp_fd != -1)
+		close(kvp_fd);
+	in_hand_shake = 1;
+	kvp_fd = open("/dev/vmbus/hv_kvp", O_RDWR | O_CLOEXEC);
+
+	if (kvp_fd < 0) {
+		syslog(LOG_ERR, "open /dev/vmbus/hv_kvp failed; error: %d %s",
+		       errno, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	/*
+	 * Register ourselves with the kernel.
+	 */
+	hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
+	len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
+	if (len != sizeof(struct hv_kvp_msg)) {
+		syslog(LOG_ERR, "registration to kernel failed; error: %d %s",
+		       errno, strerror(errno));
+		close(kvp_fd);
+		exit(EXIT_FAILURE);
+	}
+
+	pfd.fd = kvp_fd;
+
+	while (1) {
+		pfd.events = POLLIN;
+		pfd.revents = 0;
+
+		if (poll(&pfd, 1, -1) < 0) {
+			syslog(LOG_ERR, "poll failed; error: %d %s", errno, strerror(errno));
+			if (errno == EINVAL) {
+				close(kvp_fd);
+				exit(EXIT_FAILURE);
+			}
+			else
+				continue;
+		}
+
+		len = read(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
+
+		if (len != sizeof(struct hv_kvp_msg)) {
+			syslog(LOG_ERR, "read failed; error:%d %s",
+			       errno, strerror(errno));
+			goto reopen_kvp_fd;
+		}
+
+		/*
+		 * We will use the KVP header information to pass back
+		 * the error from this daemon. So, first copy the state
+		 * and set the error code to success.
+		 */
+		op = hv_msg->kvp_hdr.operation;
+		pool = hv_msg->kvp_hdr.pool;
+		hv_msg->error = HV_S_OK;
+
+		if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
+			/*
+			 * Driver is registering with us; stash away the version
+			 * information.
+			 */
+			in_hand_shake = 0;
+			p = (char *)hv_msg->body.kvp_register.version;
+			lic_version = malloc(strlen(p) + 1);
+			if (lic_version) {
+				strcpy(lic_version, p);
+				syslog(LOG_INFO, "KVP LIC Version: %s",
+				       lic_version);
+			} else {
+				syslog(LOG_ERR, "malloc failed");
+			}
+			continue;
+		}
+
+		switch (op) {
+		case KVP_OP_GET_IP_INFO:
+			kvp_ip_val = &hv_msg->body.kvp_ip_val;
+
+			error = kvp_mac_to_ip(kvp_ip_val);
+
+			if (error)
+				hv_msg->error = error;
+
+			break;
+
+		case KVP_OP_SET_IP_INFO:
+			kvp_ip_val = &hv_msg->body.kvp_ip_val;
+			if_name = kvp_get_if_name(
+					(char *)kvp_ip_val->adapter_id);
+			if (if_name == NULL) {
+				/*
+				 * We could not map the guid to an
+				 * interface name; return error.
+				 */
+				hv_msg->error = HV_GUID_NOTFOUND;
+				break;
+			}
+			error = kvp_set_ip_info(if_name, kvp_ip_val);
+			if (error)
+				hv_msg->error = error;
+
+			free(if_name);
+			break;
+
+		case KVP_OP_SET:
+			if (kvp_key_add_or_modify(pool,
+					hv_msg->body.kvp_set.data.key,
+					hv_msg->body.kvp_set.data.key_size,
+					hv_msg->body.kvp_set.data.value,
+					hv_msg->body.kvp_set.data.value_size))
+					hv_msg->error = HV_S_CONT;
+			break;
+
+		case KVP_OP_GET:
+			if (kvp_get_value(pool,
+					hv_msg->body.kvp_set.data.key,
+					hv_msg->body.kvp_set.data.key_size,
+					hv_msg->body.kvp_set.data.value,
+					hv_msg->body.kvp_set.data.value_size))
+					hv_msg->error = HV_S_CONT;
+			break;
+
+		case KVP_OP_DELETE:
+			if (kvp_key_delete(pool,
+					hv_msg->body.kvp_delete.key,
+					hv_msg->body.kvp_delete.key_size))
+					hv_msg->error = HV_S_CONT;
+			break;
+
+		default:
+			break;
+		}
+
+		if (op != KVP_OP_ENUMERATE)
+			goto kvp_done;
+
+		/*
+		 * If the pool is KVP_POOL_AUTO, dynamically generate
+		 * both the key and the value; if not read from the
+		 * appropriate pool.
+		 */
+		if (pool != KVP_POOL_AUTO) {
+			if (kvp_pool_enumerate(pool,
+					hv_msg->body.kvp_enum_data.index,
+					hv_msg->body.kvp_enum_data.data.key,
+					HV_KVP_EXCHANGE_MAX_KEY_SIZE,
+					hv_msg->body.kvp_enum_data.data.value,
+					HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
+					hv_msg->error = HV_S_CONT;
+			goto kvp_done;
+		}
+
+		key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
+		key_value = (char *)hv_msg->body.kvp_enum_data.data.value;
+
+		switch (hv_msg->body.kvp_enum_data.index) {
+		case FullyQualifiedDomainName:
+			strcpy(key_value, full_domain_name);
+			strcpy(key_name, "FullyQualifiedDomainName");
+			break;
+		case IntegrationServicesVersion:
+			strcpy(key_name, "IntegrationServicesVersion");
+			strcpy(key_value, lic_version);
+			break;
+		case NetworkAddressIPv4:
+			kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
+				key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
+			strcpy(key_name, "NetworkAddressIPv4");
+			break;
+		case NetworkAddressIPv6:
+			kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
+				key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
+			strcpy(key_name, "NetworkAddressIPv6");
+			break;
+		case OSBuildNumber:
+			strcpy(key_value, os_build);
+			strcpy(key_name, "OSBuildNumber");
+			break;
+		case OSName:
+			strcpy(key_value, os_name);
+			strcpy(key_name, "OSName");
+			break;
+		case OSMajorVersion:
+			strcpy(key_value, os_major);
+			strcpy(key_name, "OSMajorVersion");
+			break;
+		case OSMinorVersion:
+			strcpy(key_value, os_minor);
+			strcpy(key_name, "OSMinorVersion");
+			break;
+		case OSVersion:
+			strcpy(key_value, os_version);
+			strcpy(key_name, "OSVersion");
+			break;
+		case ProcessorArchitecture:
+			strcpy(key_value, processor_arch);
+			strcpy(key_name, "ProcessorArchitecture");
+			break;
+		default:
+			hv_msg->error = HV_S_CONT;
+			break;
+		}
+
+		/*
+		 * Send the value back to the kernel. Note: the write() may
+		 * return an error due to hibernation; we can ignore the error
+		 * by resetting the dev file, i.e. closing and re-opening it.
+		 */
+kvp_done:
+		len = write(kvp_fd, hv_msg, sizeof(struct hv_kvp_msg));
+		if (len != sizeof(struct hv_kvp_msg)) {
+			syslog(LOG_ERR, "write failed; error: %d %s", errno,
+			       strerror(errno));
+			goto reopen_kvp_fd;
+		}
+	}
+
+	close(kvp_fd);
+	exit(0);
+}
diff --git a/hyper-v.tools.hv.hv_set_ifconfig.sh b/hyper-v.tools.hv.hv_set_ifconfig.sh
new file mode 100644
index 0000000..11efe3d
--- /dev/null
+++ b/hyper-v.tools.hv.hv_set_ifconfig.sh
@@ -0,0 +1,247 @@
+#!/bin/bash
+#
+# In the interest of keeping the KVP daemon code free of distro specific
+# information; the kvp daemon code invokes this external script to configure
+# the interface.
+#
+# The only argument to this script is the configuration file that is to
+# be used to configure the interface.
+#
+# Here is the ifcfg format of the ip configuration file:
+#
+# HWADDR=macaddr
+# DEVICE=interface name
+# BOOTPROTO=<protocol> (where <protocol> is "dhcp" if DHCP is configured
+# 			or "none" if no boot-time protocol should be used)
+#
+# IPADDR0=ipaddr1
+# IPADDR1=ipaddr2
+# IPADDRx=ipaddry (where y = x + 1)
+#
+# NETMASK0=netmask1
+# NETMASKx=netmasky (where y = x + 1)
+#
+# GATEWAY=ipaddr1
+# GATEWAYx=ipaddry (where y = x + 1)
+#
+# DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
+#
+# IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
+# tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
+# IPV6NETMASK.
+#
+# Here is the keyfile format of the ip configuration file:
+#
+# [ethernet]
+# mac-address=macaddr
+# [connection]
+# interface-name=interface name
+#
+# [ipv4]
+# method=<protocol> (where <protocol> is "auto" if DHCP is configured
+#                       or "manual" if no boot-time protocol should be used)
+#
+# address1=ipaddr1/plen
+# address2=ipaddr2/plen
+#
+# gateway=gateway1;gateway2
+#
+# dns=dns1;
+#
+# [ipv6]
+# address1=ipaddr1/plen
+# address2=ipaddr2/plen
+#
+# gateway=gateway1;gateway2
+#
+# dns=dns1;dns2
+#
+# The host can specify multiple ipv4 and ipv6 addresses to be
+# configured for the interface. Furthermore, the configuration
+# needs to be persistent. A subsequent GET call on the interface
+# is expected to return the configuration that is set via the SET
+# call.
+#
+if_cfg=$1
+nm_cfg=$2
+if ! test -f "${if_cfg}"
+then
+	: expect configuration datafile as first argument
+	exit 1
+fi
+# send subshell output to syslog
+(
+# copied from /etc/sysconfig/network/scripts/functions
+mask2pfxlen() {
+	local i octet width=0 mask=(${1//./ })
+	test ${#mask[@]} -eq 4 || return 1
+	for octet in 0 1 2 3
+	do
+		test "${mask[octet]}" -ge 0 -a "${mask[octet]}" -le 255 || return 1
+		for i in 128 192 224 240 248 252 254 255
+		do
+			test ${mask[octet]} -ge $i && ((width++))
+		done
+	done
+	echo $width
+	return 0
+}
+
+pfxlen2mask() {
+	test -n "$1" || return 1
+	local o i n=0 adr=() len=$(($1))
+	for o in 0 1 2 3
+	do
+		adr[$o]=0
+		for i in 128 64 32 16 8 4 2 1
+		do
+			((n++ < len)) && ((adr[$o] = ${adr[$o]} + $i))
+		done
+	done
+	echo ${adr[0]}.${adr[1]}.${adr[2]}.${adr[3]}
+	return 0
+}
+
+# remove known config variables from environment 
+unset HWADDR
+unset BOOTPROTO
+unset DEVICE
+unset ${!IPADDR*}
+unset ${!NETMASK*}
+unset ${!GATEWAY*}
+unset ${!IPV6ADDR*}
+unset ${!IPV6NETMASK*}
+unset ${!IPV6_DEFAULTGW*}
+unset ${!DNS*}
+. "${if_cfg}"
+#
+if test -z "${DEVICE}"
+then
+	echo "Missing DEVICE= in ${if_cfg}"
+	exit 1
+fi
+#
+t_ifcfg=`mktemp`
+t_ifroute=`mktemp`
+_exit() {
+	rm -f "${t_ifcfg}" "${t_ifroute}"
+}
+trap _exit EXIT
+#
+if test -z "${t_ifcfg}" || test -z "${t_ifroute}"
+then
+	exit 1
+fi
+#
+# Create ifcfg-* file
+(
+	echo "STARTMODE=auto"
+	#
+	if test -n "${HWADDR}"
+	then
+		: # ignore HWADDR, it just repeats the existing MAC value
+	fi
+	#
+	if test "${BOOTPROTO}" = "dhcp"
+	then
+		echo "BOOTPROTO=dhcp"
+	elif test -n "${!IPADDR*}${!IPV6ADDR*}"
+	then
+		echo "BOOTPROTO=static"
+	fi
+	# single index for all ipv4 and ipv6 adresses in final ifcfg file
+	i=0
+	idx=""
+	# loop through all ipv4 adresses
+	for var in ${!IPADDR*}
+	do
+		index=${var#IPADDR}
+		pfx=
+		# find corresponding NETMASK variable
+		eval nm=\$NETMASK${index}
+		# if specified, calculate prefix
+		if test -n "${nm}"
+		then
+			pfx=`mask2pfxlen "${nm}" 2>/dev/null`
+		fi
+		# if not specified, force prefix
+		if test -z "${pfx}"
+		then
+			pfx="32"
+		fi
+		# construct actual value
+		eval val=\$IPADDR${index}
+		# write config variable
+		echo "IPADDR${idx}='${val}/${pfx}'"
+		idx="_$((++i))"
+	done
+	# loop through all ipv6 adresses
+	for var in ${!IPV6ADDR*}
+	do
+		index=${var#IPV6ADDR}
+		# find corresponding IPV6NETMASK variable
+		eval pfx=\$IPV6NETMASK${index}
+		# if not specified, force prefix
+		if test -z "${pfx}"
+		then
+			pfx=128
+		fi
+		# construct actual value
+		eval val=\$IPV6ADDR${index}
+		# write config variable
+		echo "IPADDR${idx}='${val}/${pfx}'"
+		idx="_$((++i))"
+	done
+
+) >> "${t_ifcfg}"
+
+# Create ifroute-* file
+(
+	if test -n "${GATEWAY}"
+	then
+		echo "default $GATEWAY - $DEVICE"
+	fi
+	if test -n "${IPV6_DEFAULTGW}"
+	then
+		echo "default $IPV6_DEFAULTGW - $DEVICE"
+	fi
+) >> "${t_ifroute}"
+# Only a single default gateway is supported
+unset GATEWAY IPV6_DEFAULTGW
+if test -n "${!GATEWAY*}${!IPV6_DEFAULTGW*}"
+then
+	echo "WARNING: multiple gateways not supported: ${!GATEWAY*} ${!IPV6_DEFAULTGW*}"
+fi
+
+# collect DNS info
+_DNS_=
+for var in ${!DNS*}
+do
+	eval val=\$${var}
+	if test -n "${_DNS_}"
+	then
+		_DNS_="${_DNS_} ${val}"
+	else
+		_DNS_=${val}
+	fi
+done
+#
+echo "$0: working on network interface ifcfg-${DEVICE}"
+mkdir -vp "/etc/sysconfig/network"
+cp -fb ${t_ifcfg} "/etc/sysconfig/network/ifcfg-${DEVICE}"
+cp -fb ${t_ifroute} "/etc/sysconfig/network/ifroute-${DEVICE}"
+if test -w /etc/sysconfig/network/config
+then
+	sed -i "s@^NETCONFIG_DNS_STATIC_SERVERS=.*@NETCONFIG_DNS_STATIC_SERVERS='$_DNS_'@"  /etc/sysconfig/network/config
+	netconfig update -m dns
+fi
+
+echo "$0: working on network interface ifcfg-${DEVICE}"
+nm_filename="${nm_cfg##*/}"
+mkdir -vp "/etc/NetworkManager/system-connections"
+umask 0177
+sed '/\[connection\]/a autoconnect=true' "${nm_cfg}" > "/etc/NetworkManager/system-connections/${nm_filename}"
+
+ifdown "${DEVICE}"
+ifup "${DEVICE}"
+) 2>&1 | logger -t "${0##*/}[$PPID / $$]"
diff --git a/hyper-v.tools.hv.hv_vss_daemon.c b/hyper-v.tools.hv.hv_vss_daemon.c
new file mode 100644
index 0000000..62b9a9e
--- /dev/null
+++ b/hyper-v.tools.hv.hv_vss_daemon.c
@@ -0,0 +1,355 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * An implementation of the host initiated guest snapshot for Hyper-V.
+ *
+ * Copyright (C) 2013, Microsoft, Inc.
+ * Author : K. Y. Srinivasan <kys@microsoft.com>
+ */
+
+
+#include <sys/types.h>
+#include <sys/poll.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <mntent.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <linux/fs.h>
+#include <linux/major.h>
+#include <linux/hyperv.h>
+#include <syslog.h>
+#include <getopt.h>
+#include <stdbool.h>
+#include <dirent.h>
+
+static bool fs_frozen;
+
+/* Don't use syslog() in the function since that can cause write to disk */
+static int vss_do_freeze(char *dir, unsigned int cmd)
+{
+	int ret, fd = open(dir, O_RDONLY);
+
+	if (fd < 0)
+		return 1;
+
+	ret = ioctl(fd, cmd, 0);
+
+	/*
+	 * If a partition is mounted more than once, only the first
+	 * FREEZE/THAW can succeed and the later ones will get
+	 * EBUSY/EINVAL respectively: there could be 2 cases:
+	 * 1) a user may mount the same partition to different directories
+	 *  by mistake or on purpose;
+	 * 2) The subvolume of btrfs appears to have the same partition
+	 * mounted more than once.
+	 */
+	if (ret) {
+		if ((cmd == FIFREEZE && errno == EBUSY) ||
+		    (cmd == FITHAW && errno == EINVAL)) {
+			close(fd);
+			return 0;
+		}
+	}
+
+	close(fd);
+	return !!ret;
+}
+
+static bool is_dev_loop(const char *blkname)
+{
+	char *buffer;
+	DIR *dir;
+	struct dirent *entry;
+	bool ret = false;
+
+	buffer = malloc(PATH_MAX);
+	if (!buffer) {
+		syslog(LOG_ERR, "Can't allocate memory!");
+		exit(1);
+	}
+
+	snprintf(buffer, PATH_MAX, "%s/loop", blkname);
+	if (!access(buffer, R_OK | X_OK)) {
+		ret = true;
+		goto free_buffer;
+	} else if (errno != ENOENT) {
+		syslog(LOG_ERR, "Can't access: %s; error:%d %s!",
+		       buffer, errno, strerror(errno));
+	}
+
+	snprintf(buffer, PATH_MAX, "%s/slaves", blkname);
+	dir = opendir(buffer);
+	if (!dir) {
+		if (errno != ENOENT)
+			syslog(LOG_ERR, "Can't opendir: %s; error:%d %s!",
+			       buffer, errno, strerror(errno));
+		goto free_buffer;
+	}
+
+	while ((entry = readdir(dir)) != NULL) {
+		if (strcmp(entry->d_name, ".") == 0 ||
+		    strcmp(entry->d_name, "..") == 0)
+			continue;
+
+		snprintf(buffer, PATH_MAX, "%s/slaves/%s", blkname,
+			 entry->d_name);
+		if (is_dev_loop(buffer)) {
+			ret = true;
+			break;
+		}
+	}
+	closedir(dir);
+free_buffer:
+	free(buffer);
+	return ret;
+}
+
+static int vss_operate(int operation)
+{
+	char match[] = "/dev/";
+	FILE *mounts;
+	struct mntent *ent;
+	struct stat sb;
+	char errdir[1024] = {0};
+	char blkdir[23]; /* /sys/dev/block/XXX:XXX */
+	unsigned int cmd;
+	int error = 0, root_seen = 0, save_errno = 0;
+
+	switch (operation) {
+	case VSS_OP_FREEZE:
+		cmd = FIFREEZE;
+		break;
+	case VSS_OP_THAW:
+		cmd = FITHAW;
+		break;
+	default:
+		return -1;
+	}
+
+	mounts = setmntent("/proc/mounts", "r");
+	if (mounts == NULL)
+		return -1;
+
+	while ((ent = getmntent(mounts))) {
+		if (strncmp(ent->mnt_fsname, match, strlen(match)))
+			continue;
+		if (stat(ent->mnt_fsname, &sb)) {
+			syslog(LOG_ERR, "Can't stat: %s; error:%d %s!",
+			       ent->mnt_fsname, errno, strerror(errno));
+		} else {
+			sprintf(blkdir, "/sys/dev/block/%d:%d",
+				major(sb.st_rdev), minor(sb.st_rdev));
+			if (is_dev_loop(blkdir))
+				continue;
+		}
+		if (hasmntopt(ent, MNTOPT_RO) != NULL)
+			continue;
+		if (strcmp(ent->mnt_type, "vfat") == 0)
+			continue;
+		if (strcmp(ent->mnt_dir, "/") == 0) {
+			root_seen = 1;
+			continue;
+		}
+		error |= vss_do_freeze(ent->mnt_dir, cmd);
+		if (operation == VSS_OP_FREEZE) {
+			if (error)
+				goto err;
+			fs_frozen = true;
+		}
+	}
+
+	endmntent(mounts);
+
+	if (root_seen) {
+		error |= vss_do_freeze("/", cmd);
+		if (operation == VSS_OP_FREEZE) {
+			if (error)
+				goto err;
+			fs_frozen = true;
+		}
+	}
+
+	if (operation == VSS_OP_THAW && !error)
+		fs_frozen = false;
+
+	goto out;
+err:
+	save_errno = errno;
+	if (ent) {
+		strncpy(errdir, ent->mnt_dir, sizeof(errdir)-1);
+		endmntent(mounts);
+	}
+	vss_operate(VSS_OP_THAW);
+	fs_frozen = false;
+	/* Call syslog after we thaw all filesystems */
+	if (ent)
+		syslog(LOG_ERR, "FREEZE of %s failed; error:%d %s",
+		       errdir, save_errno, strerror(save_errno));
+	else
+		syslog(LOG_ERR, "FREEZE of / failed; error:%d %s", save_errno,
+		       strerror(save_errno));
+out:
+	return error;
+}
+
+void print_usage(char *argv[])
+{
+	fprintf(stderr, "Usage: %s [options]\n"
+		"Options are:\n"
+		"  -n, --no-daemon        stay in foreground, don't daemonize\n"
+		"  -h, --help             print this help\n", argv[0]);
+}
+
+int main(int argc, char *argv[])
+{
+	int vss_fd = -1, len;
+	int error;
+	struct pollfd pfd;
+	int	op;
+	struct hv_vss_msg vss_msg[1];
+	int daemonize = 1, long_index = 0, opt;
+	int in_handshake;
+	__u32 kernel_modver;
+
+	static struct option long_options[] = {
+		{"help",	no_argument,	   0,  'h' },
+		{"no-daemon",	no_argument,	   0,  'n' },
+		{0,		0,		   0,  0   }
+	};
+
+	while ((opt = getopt_long(argc, argv, "hn", long_options,
+				  &long_index)) != -1) {
+		switch (opt) {
+		case 'n':
+			daemonize = 0;
+			break;
+		case 'h':
+			print_usage(argv);
+			exit(0);
+		default:
+			print_usage(argv);
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	if (daemonize && daemon(1, 0))
+		return 1;
+
+	openlog("Hyper-V VSS", 0, LOG_USER);
+	syslog(LOG_INFO, "VSS starting; pid is:%d", getpid());
+
+reopen_vss_fd:
+	if (vss_fd != -1)
+		close(vss_fd);
+	if (fs_frozen) {
+		if (vss_operate(VSS_OP_THAW) || fs_frozen) {
+			syslog(LOG_ERR, "failed to thaw file system: err=%d",
+			       errno);
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	in_handshake = 1;
+	vss_fd = open("/dev/vmbus/hv_vss", O_RDWR);
+	if (vss_fd < 0) {
+		syslog(LOG_ERR, "open /dev/vmbus/hv_vss failed; error: %d %s",
+		       errno, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+	/*
+	 * Register ourselves with the kernel.
+	 */
+	vss_msg->vss_hdr.operation = VSS_OP_REGISTER1;
+
+	len = write(vss_fd, vss_msg, sizeof(struct hv_vss_msg));
+	if (len < 0) {
+		syslog(LOG_ERR, "registration to kernel failed; error: %d %s",
+		       errno, strerror(errno));
+		close(vss_fd);
+		exit(EXIT_FAILURE);
+	}
+
+	pfd.fd = vss_fd;
+
+	while (1) {
+		pfd.events = POLLIN;
+		pfd.revents = 0;
+
+		if (poll(&pfd, 1, -1) < 0) {
+			syslog(LOG_ERR, "poll failed; error:%d %s", errno, strerror(errno));
+			if (errno == EINVAL) {
+				close(vss_fd);
+				exit(EXIT_FAILURE);
+			}
+			else
+				continue;
+		}
+
+		len = read(vss_fd, vss_msg, sizeof(struct hv_vss_msg));
+
+		if (in_handshake) {
+			if (len != sizeof(kernel_modver)) {
+				syslog(LOG_ERR, "invalid version negotiation");
+				exit(EXIT_FAILURE);
+			}
+			kernel_modver = *(__u32 *)vss_msg;
+			in_handshake = 0;
+			syslog(LOG_INFO, "VSS: kernel module version: %d",
+			       kernel_modver);
+			continue;
+		}
+
+		if (len != sizeof(struct hv_vss_msg)) {
+			syslog(LOG_ERR, "read failed; error:%d %s",
+			       errno, strerror(errno));
+			goto reopen_vss_fd;
+		}
+
+		op = vss_msg->vss_hdr.operation;
+		error =  HV_S_OK;
+
+		switch (op) {
+		case VSS_OP_FREEZE:
+		case VSS_OP_THAW:
+			error = vss_operate(op);
+			syslog(LOG_INFO, "VSS: op=%s: %s\n",
+				op == VSS_OP_FREEZE ? "FREEZE" : "THAW",
+				error ? "failed" : "succeeded");
+
+			if (error) {
+				error = HV_E_FAIL;
+				syslog(LOG_ERR, "op=%d failed!", op);
+				syslog(LOG_ERR, "report it with these files:");
+				syslog(LOG_ERR, "/etc/fstab and /proc/mounts");
+			}
+			break;
+		case VSS_OP_HOT_BACKUP:
+			syslog(LOG_INFO, "VSS: op=CHECK HOT BACKUP\n");
+			break;
+		default:
+			syslog(LOG_ERR, "Illegal op:%d\n", op);
+		}
+
+		/*
+		 * The write() may return an error due to the faked VSS_OP_THAW
+		 * message upon hibernation. Ignore the error by resetting the
+		 * dev file, i.e. closing and re-opening it.
+		 */
+		vss_msg->error = error;
+		len = write(vss_fd, vss_msg, sizeof(struct hv_vss_msg));
+		if (len != sizeof(struct hv_vss_msg)) {
+			syslog(LOG_ERR, "write failed; error: %d %s", errno,
+			       strerror(errno));
+			goto reopen_vss_fd;
+		}
+	}
+
+	close(vss_fd);
+	exit(0);
+}
diff --git a/hyper-v.tools.hv.vmbus_bufring.c b/hyper-v.tools.hv.vmbus_bufring.c
new file mode 100644
index 0000000..faf5945
--- /dev/null
+++ b/hyper-v.tools.hv.vmbus_bufring.c
@@ -0,0 +1,318 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2009-2012,2016,2023 Microsoft Corp.
+ * Copyright (c) 2012 NetApp Inc.
+ * Copyright (c) 2012 Citrix Inc.
+ * All rights reserved.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <emmintrin.h>
+#include <linux/limits.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include "vmbus_bufring.h"
+
+/**
+ * Compiler barrier.
+ *
+ * Guarantees that operation reordering does not occur at compile time
+ * for operations directly before and after the barrier.
+ */
+#define	rte_compiler_barrier()		({ asm volatile ("" : : : "memory"); })
+
+#define VMBUS_RQST_ERROR	0xFFFFFFFFFFFFFFFF
+#define ALIGN(val, align)	((typeof(val))((val) & (~((typeof(val))((align) - 1)))))
+
+void *vmbus_uio_map(int *fd, int size)
+{
+	void *map;
+
+	map = mmap(NULL, 2 * size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, 0);
+	if (map == MAP_FAILED)
+		return NULL;
+
+	return map;
+}
+
+/* Increase bufring index by inc with wraparound */
+static inline uint32_t vmbus_br_idxinc(uint32_t idx, uint32_t inc, uint32_t sz)
+{
+	idx += inc;
+	if (idx >= sz)
+		idx -= sz;
+
+	return idx;
+}
+
+void vmbus_br_setup(struct vmbus_br *br, void *buf, unsigned int blen)
+{
+	br->vbr = buf;
+	br->windex = br->vbr->windex;
+	br->dsize = blen - sizeof(struct vmbus_bufring);
+}
+
+static inline __always_inline void
+rte_smp_mb(void)
+{
+	asm volatile("lock addl $0, -128(%%rsp); " ::: "memory");
+}
+
+static inline int
+rte_atomic32_cmpset(volatile uint32_t *dst, uint32_t exp, uint32_t src)
+{
+	uint8_t res;
+
+	asm volatile("lock ; "
+		     "cmpxchgl %[src], %[dst];"
+		     "sete %[res];"
+		     : [res] "=a" (res),     /* output */
+		     [dst] "=m" (*dst)
+		     : [src] "r" (src),      /* input */
+		     "a" (exp),
+		     "m" (*dst)
+		     : "memory");            /* no-clobber list */
+	return res;
+}
+
+static inline uint32_t
+vmbus_txbr_copyto(const struct vmbus_br *tbr, uint32_t windex,
+		  const void *src0, uint32_t cplen)
+{
+	uint8_t *br_data = tbr->vbr->data;
+	uint32_t br_dsize = tbr->dsize;
+	const uint8_t *src = src0;
+
+	/* XXX use double mapping like Linux kernel? */
+	if (cplen > br_dsize - windex) {
+		uint32_t fraglen = br_dsize - windex;
+
+		/* Wrap-around detected */
+		memcpy(br_data + windex, src, fraglen);
+		memcpy(br_data, src + fraglen, cplen - fraglen);
+	} else {
+		memcpy(br_data + windex, src, cplen);
+	}
+
+	return vmbus_br_idxinc(windex, cplen, br_dsize);
+}
+
+/*
+ * Write scattered channel packet to TX bufring.
+ *
+ * The offset of this channel packet is written as a 64bits value
+ * immediately after this channel packet.
+ *
+ * The write goes through three stages:
+ *  1. Reserve space in ring buffer for the new data.
+ *     Writer atomically moves priv_write_index.
+ *  2. Copy the new data into the ring.
+ *  3. Update the tail of the ring (visible to host) that indicates
+ *     next read location. Writer updates write_index
+ */
+static int
+vmbus_txbr_write(struct vmbus_br *tbr, const struct iovec iov[], int iovlen)
+{
+	struct vmbus_bufring *vbr = tbr->vbr;
+	uint32_t ring_size = tbr->dsize;
+	uint32_t old_windex, next_windex, windex, total;
+	uint64_t save_windex;
+	int i;
+
+	total = 0;
+	for (i = 0; i < iovlen; i++)
+		total += iov[i].iov_len;
+	total += sizeof(save_windex);
+
+	/* Reserve space in ring */
+	do {
+		uint32_t avail;
+
+		/* Get current free location */
+		old_windex = tbr->windex;
+
+		/* Prevent compiler reordering this with calculation */
+		rte_compiler_barrier();
+
+		avail = vmbus_br_availwrite(tbr, old_windex);
+
+		/* If not enough space in ring, then tell caller. */
+		if (avail <= total)
+			return -EAGAIN;
+
+		next_windex = vmbus_br_idxinc(old_windex, total, ring_size);
+
+		/* Atomic update of next write_index for other threads */
+	} while (!rte_atomic32_cmpset(&tbr->windex, old_windex, next_windex));
+
+	/* Space from old..new is now reserved */
+	windex = old_windex;
+	for (i = 0; i < iovlen; i++)
+		windex = vmbus_txbr_copyto(tbr, windex, iov[i].iov_base, iov[i].iov_len);
+
+	/* Set the offset of the current channel packet. */
+	save_windex = ((uint64_t)old_windex) << 32;
+	windex = vmbus_txbr_copyto(tbr, windex, &save_windex,
+				   sizeof(save_windex));
+
+	/* The region reserved should match region used */
+	if (windex != next_windex)
+		return -EINVAL;
+
+	/* Ensure that data is available before updating host index */
+	rte_compiler_barrier();
+
+	/* Checkin for our reservation. wait for our turn to update host */
+	while (!rte_atomic32_cmpset(&vbr->windex, old_windex, next_windex))
+		_mm_pause();
+
+	return 0;
+}
+
+int rte_vmbus_chan_send(struct vmbus_br *txbr, uint16_t type, void *data,
+			uint32_t dlen, uint32_t flags)
+{
+	struct vmbus_chanpkt pkt;
+	unsigned int pktlen, pad_pktlen;
+	const uint32_t hlen = sizeof(pkt);
+	uint64_t pad = 0;
+	struct iovec iov[3];
+	int error;
+
+	pktlen = hlen + dlen;
+	pad_pktlen = ALIGN(pktlen, sizeof(uint64_t));
+
+	pkt.hdr.type = type;
+	pkt.hdr.flags = flags;
+	pkt.hdr.hlen = hlen >> VMBUS_CHANPKT_SIZE_SHIFT;
+	pkt.hdr.tlen = pad_pktlen >> VMBUS_CHANPKT_SIZE_SHIFT;
+	pkt.hdr.xactid = VMBUS_RQST_ERROR;
+
+	iov[0].iov_base = &pkt;
+	iov[0].iov_len = hlen;
+	iov[1].iov_base = data;
+	iov[1].iov_len = dlen;
+	iov[2].iov_base = &pad;
+	iov[2].iov_len = pad_pktlen - pktlen;
+
+	error = vmbus_txbr_write(txbr, iov, 3);
+
+	return error;
+}
+
+static inline uint32_t
+vmbus_rxbr_copyfrom(const struct vmbus_br *rbr, uint32_t rindex,
+		    void *dst0, size_t cplen)
+{
+	const uint8_t *br_data = rbr->vbr->data;
+	uint32_t br_dsize = rbr->dsize;
+	uint8_t *dst = dst0;
+
+	if (cplen > br_dsize - rindex) {
+		uint32_t fraglen = br_dsize - rindex;
+
+		/* Wrap-around detected. */
+		memcpy(dst, br_data + rindex, fraglen);
+		memcpy(dst + fraglen, br_data, cplen - fraglen);
+	} else {
+		memcpy(dst, br_data + rindex, cplen);
+	}
+
+	return vmbus_br_idxinc(rindex, cplen, br_dsize);
+}
+
+/* Copy data from receive ring but don't change index */
+static int
+vmbus_rxbr_peek(const struct vmbus_br *rbr, void *data, size_t dlen)
+{
+	uint32_t avail;
+
+	/*
+	 * The requested data and the 64bits channel packet
+	 * offset should be there at least.
+	 */
+	avail = vmbus_br_availread(rbr);
+	if (avail < dlen + sizeof(uint64_t))
+		return -EAGAIN;
+
+	vmbus_rxbr_copyfrom(rbr, rbr->vbr->rindex, data, dlen);
+	return 0;
+}
+
+/*
+ * Copy data from receive ring and change index
+ * NOTE:
+ * We assume (dlen + skip) == sizeof(channel packet).
+ */
+static int
+vmbus_rxbr_read(struct vmbus_br *rbr, void *data, size_t dlen, size_t skip)
+{
+	struct vmbus_bufring *vbr = rbr->vbr;
+	uint32_t br_dsize = rbr->dsize;
+	uint32_t rindex;
+
+	if (vmbus_br_availread(rbr) < dlen + skip + sizeof(uint64_t))
+		return -EAGAIN;
+
+	/* Record where host was when we started read (for debug) */
+	rbr->windex = rbr->vbr->windex;
+
+	/*
+	 * Copy channel packet from RX bufring.
+	 */
+	rindex = vmbus_br_idxinc(rbr->vbr->rindex, skip, br_dsize);
+	rindex = vmbus_rxbr_copyfrom(rbr, rindex, data, dlen);
+
+	/*
+	 * Discard this channel packet's 64bits offset, which is useless to us.
+	 */
+	rindex = vmbus_br_idxinc(rindex, sizeof(uint64_t), br_dsize);
+
+	/* Update the read index _after_ the channel packet is fetched.	 */
+	rte_compiler_barrier();
+
+	vbr->rindex = rindex;
+
+	return 0;
+}
+
+int rte_vmbus_chan_recv_raw(struct vmbus_br *rxbr,
+			    void *data, uint32_t *len)
+{
+	struct vmbus_chanpkt_hdr pkt;
+	uint32_t dlen, bufferlen = *len;
+	int error;
+
+	error = vmbus_rxbr_peek(rxbr, &pkt, sizeof(pkt));
+	if (error)
+		return error;
+
+	if (unlikely(pkt.hlen < VMBUS_CHANPKT_HLEN_MIN))
+		/* XXX this channel is dead actually. */
+		return -EIO;
+
+	if (unlikely(pkt.hlen > pkt.tlen))
+		return -EIO;
+
+	/* Length are in quad words */
+	dlen = pkt.tlen << VMBUS_CHANPKT_SIZE_SHIFT;
+	*len = dlen;
+
+	/* If caller buffer is not large enough */
+	if (unlikely(dlen > bufferlen))
+		return -ENOBUFS;
+
+	/* Read data and skip packet header */
+	error = vmbus_rxbr_read(rxbr, data, dlen, 0);
+	if (error)
+		return error;
+
+	/* Return the number of bytes read */
+	return dlen + sizeof(uint64_t);
+}
diff --git a/hyper-v.tools.hv.vmbus_bufring.h b/hyper-v.tools.hv.vmbus_bufring.h
new file mode 100644
index 0000000..ff6673b
--- /dev/null
+++ b/hyper-v.tools.hv.vmbus_bufring.h
@@ -0,0 +1,158 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+
+#ifndef _VMBUS_BUF_H_
+#define _VMBUS_BUF_H_
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#define __packed   __attribute__((__packed__))
+#define unlikely(x)	__builtin_expect(!!(x), 0)
+
+#define ICMSGHDRFLAG_TRANSACTION	1
+#define ICMSGHDRFLAG_REQUEST		2
+#define ICMSGHDRFLAG_RESPONSE		4
+
+#define IC_VERSION_NEGOTIATION_MAX_VER_COUNT 100
+#define ICMSG_HDR (sizeof(struct vmbuspipe_hdr) + sizeof(struct icmsg_hdr))
+#define ICMSG_NEGOTIATE_PKT_SIZE(icframe_vercnt, icmsg_vercnt) \
+	(ICMSG_HDR + sizeof(struct icmsg_negotiate) + \
+	 (((icframe_vercnt) + (icmsg_vercnt)) * sizeof(struct ic_version)))
+
+/*
+ * Channel packets
+ */
+
+/* Channel packet flags */
+#define VMBUS_CHANPKT_TYPE_INBAND	0x0006
+#define VMBUS_CHANPKT_TYPE_RXBUF	0x0007
+#define VMBUS_CHANPKT_TYPE_GPA		0x0009
+#define VMBUS_CHANPKT_TYPE_COMP		0x000b
+
+#define VMBUS_CHANPKT_FLAG_NONE		0
+#define VMBUS_CHANPKT_FLAG_RC		0x0001  /* report completion */
+
+#define VMBUS_CHANPKT_SIZE_SHIFT	3
+#define VMBUS_CHANPKT_SIZE_ALIGN	BIT(VMBUS_CHANPKT_SIZE_SHIFT)
+#define VMBUS_CHANPKT_HLEN_MIN		\
+	(sizeof(struct vmbus_chanpkt_hdr) >> VMBUS_CHANPKT_SIZE_SHIFT)
+
+/*
+ * Buffer ring
+ */
+struct vmbus_bufring {
+	volatile uint32_t windex;
+	volatile uint32_t rindex;
+
+	/*
+	 * Interrupt mask {0,1}
+	 *
+	 * For TX bufring, host set this to 1, when it is processing
+	 * the TX bufring, so that we can safely skip the TX event
+	 * notification to host.
+	 *
+	 * For RX bufring, once this is set to 1 by us, host will not
+	 * further dispatch interrupts to us, even if there are data
+	 * pending on the RX bufring.  This effectively disables the
+	 * interrupt of the channel to which this RX bufring is attached.
+	 */
+	volatile uint32_t imask;
+
+	/*
+	 * Win8 uses some of the reserved bits to implement
+	 * interrupt driven flow management. On the send side
+	 * we can request that the receiver interrupt the sender
+	 * when the ring transitions from being full to being able
+	 * to handle a message of size "pending_send_sz".
+	 *
+	 * Add necessary state for this enhancement.
+	 */
+	volatile uint32_t pending_send;
+	uint32_t reserved1[12];
+
+	union {
+		struct {
+			uint32_t feat_pending_send_sz:1;
+		};
+		uint32_t value;
+	} feature_bits;
+
+	/* Pad it to rte_mem_page_size() so that data starts on page boundary */
+	uint8_t	reserved2[4028];
+
+	/*
+	 * Ring data starts here + RingDataStartOffset
+	 * !!! DO NOT place any fields below this !!!
+	 */
+	uint8_t data[];
+} __packed;
+
+struct vmbus_br {
+	struct vmbus_bufring *vbr;
+	uint32_t	dsize;
+	uint32_t	windex; /* next available location */
+};
+
+struct vmbus_chanpkt_hdr {
+	uint16_t	type;	/* VMBUS_CHANPKT_TYPE_ */
+	uint16_t	hlen;	/* header len, in 8 bytes */
+	uint16_t	tlen;	/* total len, in 8 bytes */
+	uint16_t	flags;	/* VMBUS_CHANPKT_FLAG_ */
+	uint64_t	xactid;
+} __packed;
+
+struct vmbus_chanpkt {
+	struct vmbus_chanpkt_hdr hdr;
+} __packed;
+
+struct vmbuspipe_hdr {
+	unsigned int flags;
+	unsigned int msgsize;
+} __packed;
+
+struct ic_version {
+	unsigned short major;
+	unsigned short minor;
+} __packed;
+
+struct icmsg_negotiate {
+	unsigned short icframe_vercnt;
+	unsigned short icmsg_vercnt;
+	unsigned int reserved;
+	struct ic_version icversion_data[]; /* any size array */
+} __packed;
+
+struct icmsg_hdr {
+	struct ic_version icverframe;
+	unsigned short icmsgtype;
+	struct ic_version icvermsg;
+	unsigned short icmsgsize;
+	unsigned int status;
+	unsigned char ictransaction_id;
+	unsigned char icflags;
+	unsigned char reserved[2];
+} __packed;
+
+int rte_vmbus_chan_recv_raw(struct vmbus_br *rxbr, void *data, uint32_t *len);
+int rte_vmbus_chan_send(struct vmbus_br *txbr, uint16_t type, void *data,
+			uint32_t dlen, uint32_t flags);
+void vmbus_br_setup(struct vmbus_br *br, void *buf, unsigned int blen);
+void *vmbus_uio_map(int *fd, int size);
+
+/* Amount of space available for write */
+static inline uint32_t vmbus_br_availwrite(const struct vmbus_br *br, uint32_t windex)
+{
+	uint32_t rindex = br->vbr->rindex;
+
+	if (windex >= rindex)
+		return br->dsize - (windex - rindex);
+	else
+		return rindex - windex;
+}
+
+static inline uint32_t vmbus_br_availread(const struct vmbus_br *br)
+{
+	return br->dsize - vmbus_br_availwrite(br, br->vbr->windex);
+}
+
+#endif	/* !_VMBUS_BUF_H_ */