From 30ae893a5e3d41738cd9a96c4626aa0e61fd67a6 Mon Sep 17 00:00:00 2001
From: Michael Marineau <michael.marineau@coreos.com>
Date: Mon, 14 Apr 2014 17:31:49 -0400
Subject: [PATCH] add(app-emulation/xenserver-pv-version): Fake XenServer PV
 drivers

XenServer expects virtual machines to run their own version of the Xen
para-virtualized drivers and will not attach disks otherwise. This is
pretty silly considering the ones bundled in Linux are perfectly fine.
In order to work around this write the latest version of XenServer to
special variables in xenstore. This will be included in all images
rather than OEM since this could impact any XenServer user and I want to
write to xenstore as early as possible, possibly even in the initrd.
---
 .../files/xenserver-pv-version.service        | 18 ++++++++++
 .../xenserver-pv-version-6.2.0.ebuild         | 35 +++++++++++++++++++
 2 files changed, 53 insertions(+)
 create mode 100644 sdk_container/src/third_party/coreos-overlay/app-emulation/xenserver-pv-version/files/xenserver-pv-version.service
 create mode 100644 sdk_container/src/third_party/coreos-overlay/app-emulation/xenserver-pv-version/xenserver-pv-version-6.2.0.ebuild

diff --git a/sdk_container/src/third_party/coreos-overlay/app-emulation/xenserver-pv-version/files/xenserver-pv-version.service b/sdk_container/src/third_party/coreos-overlay/app-emulation/xenserver-pv-version/files/xenserver-pv-version.service
new file mode 100644
index 0000000000..37e243d69a
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/app-emulation/xenserver-pv-version/files/xenserver-pv-version.service
@@ -0,0 +1,18 @@
+[Unit]
+Description=Set fake PV driver version for XenServer
+DefaultDependencies=false
+Requires=proc-xen.mount
+After=proc-xen.mount
+IgnoreOnIsolate=true
+ConditionVirtualization=xen
+
+[Service]
+Type=oneshot
+RemainAfterExit=true
+# Only attempt the write if 'attr' exists, it may not.
+ExecStart=/bin/sh -c \
+    'if xenstore exists attr; then xenstore write \
+        attr/PVAddons/MajorVersion @@MAJOR@@ \
+        attr/PVAddons/MinorVersion @@MINOR@@ \
+        attr/PVAddons/MicroVersion @@MICRO@@ \
+        data/updated 1; fi'
diff --git a/sdk_container/src/third_party/coreos-overlay/app-emulation/xenserver-pv-version/xenserver-pv-version-6.2.0.ebuild b/sdk_container/src/third_party/coreos-overlay/app-emulation/xenserver-pv-version/xenserver-pv-version-6.2.0.ebuild
new file mode 100644
index 0000000000..1ef244081f
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/app-emulation/xenserver-pv-version/xenserver-pv-version-6.2.0.ebuild
@@ -0,0 +1,35 @@
+# Copyright 1999-2014 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: $
+
+EAPI=5
+
+inherit systemd versionator
+
+DESCRIPTION="Fake data for XenServer's PV driver version detection."
+HOMEPAGE="http://xenserver.org/"
+SRC_URI=""
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="amd64"
+IUSE=""
+
+DEPEND=""
+RDEPEND="app-emulation/xenstore"
+
+S="${WORKDIR}"
+
+src_prepare() {
+	local split=($(get_version_components))
+	sed -e "s/@@MAJOR@@/${split[0]}/" \
+		-e "s/@@MINOR@@/${split[1]}/" \
+		-e "s/@@MICRO@@/${split[2]}/" \
+		"${FILESDIR}"/xenserver-pv-version.service \
+		> "${T}"/xenserver-pv-version.service || die
+}
+
+src_install() {
+	systemd_dounit "${T}"/xenserver-pv-version.service
+	systemd_enable_service sysinit.target xenserver-pv-version.service
+}