From b541d3f3a9c2248c28413da14dfee4eae97fd86d Mon Sep 17 00:00:00 2001
From: Lukas Nykryn <lnykryn@redhat.com>
Date: Thu, 10 Oct 2013 15:43:13 +0200
Subject: provide KVM guest count and limit info message (#1014731)

---
 initscripts.spec               |  2 ++
 udev/rules.d/81-kvm-rhel.rules |  1 +
 udev/udev-kvm-check            | 49 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 52 insertions(+)
 create mode 100644 udev/rules.d/81-kvm-rhel.rules
 create mode 100755 udev/udev-kvm-check

diff --git a/initscripts.spec b/initscripts.spec
index 0f1b3e46..e45525b8 100644
--- a/initscripts.spec
+++ b/initscripts.spec
@@ -216,6 +216,7 @@ rm -rf $RPM_BUILD_ROOT
 /lib/udev/rename_device
 /lib/udev/console_init
 /lib/udev/console_check
+/lib/udev/udev-kvm-check
 /sbin/service
 /sbin/ppp-watch
 %{_mandir}/man*/*
@@ -237,6 +238,7 @@ rm -rf $RPM_BUILD_ROOT
 %ghost %attr(0600,root,utmp) /var/log/btmp
 %ghost %attr(0664,root,utmp) /var/log/wtmp
 %ghost %attr(0664,root,utmp) /var/run/utmp
+%ghost %attr(0644,root,root) /etc/sysconfig/kvm
 
 %files -n debugmode
 %defattr(-,root,root)
diff --git a/udev/rules.d/81-kvm-rhel.rules b/udev/rules.d/81-kvm-rhel.rules
new file mode 100644
index 00000000..787cad62
--- /dev/null
+++ b/udev/rules.d/81-kvm-rhel.rules
@@ -0,0 +1 @@
+DEVPATH=="*/kvm", ACTION=="change", RUN+="/lib/udev/udev-kvm-check $env{COUNT} $env{EVENT}"
diff --git a/udev/udev-kvm-check b/udev/udev-kvm-check
new file mode 100755
index 00000000..f8a9921e
--- /dev/null
+++ b/udev/udev-kvm-check
@@ -0,0 +1,49 @@
+#! /bin/sh
+
+if test -f /etc/sysconfig/kvm; then
+  . /etc/sysconfig/kvm
+fi
+
+: ${THRESHOLD:=0}
+COUNT=$1
+EVENT=$2
+
+if [ "$THRESHOLD" -eq 0 ]; then
+  level=user.debug
+else
+  level=user.info
+fi
+
+subscr_msg="your Red Hat Enterprise Linux subscription limit is $THRESHOLD"
+subscr_msg="$subscr_msg guests. Please review your Red Hat Enterprise Linux"
+subscr_msg="$subscr_msg subscription agreement or contact your Red Hat"
+subscr_msg="$subscr_msg support representative for more information. You"
+subscr_msg="$subscr_msg may review the Red Hat Enterprise subscription"
+subscr_msg="$subscr_msg limits at http://www.redhat.com/rhel-virt-limits"
+
+case $COUNT in
+  1) guests=guest ;;
+  *) guests=guests ;;
+esac
+
+case $EVENT in
+  create)
+    if [ "$THRESHOLD" -eq 0 ]; then
+      msg="$COUNT $guests now active"
+    elif [ $COUNT -gt "$THRESHOLD" ]; then
+      level=user.warning
+      msg="$COUNT $guests are currently active; $subscr_msg"
+    fi
+    ;;
+  terminate)
+    if [ $COUNT -ge "$THRESHOLD" ]; then
+      msg="$COUNT $guests now active"
+    fi
+    ;;
+esac
+
+if [ -n "$msg" ]; then
+  logger -p $level "KVM: $msg"
+fi
+exit 0
+
-- 
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