Add SR-IOV and IOMMU configuration check

Check if SR-IOV and IOMMU are properly configured for using in
virtual machines on compute nodes before trying to configure
SR-IOV in Nova.

Change-Id: Ide5dfc4779864442b0765e1101d67240398b2f18
Implements: blueprint support-sriov

deployment/puppet/osnailyfacter/modular/netconfig/sriov_iommu_check.rb

@@ -0,0 +1,52 @@
+#!/usr/bin/env ruby
+#
+# This script checks thats SR-IOV and IOMMU are properly configured
+# for using in virtual machines.
+#
+# Example of network scheme with SR-IOV enabled NIC
+#
+# network_scheme:
+#   transformations:
+#   - action: add-port
+#     name: em1
+#     provider: sriov
+
+require 'hiera'
+
+ENV['LANG'] = 'C'
+errors = 0
+
+hiera = Hiera.new(:config => '/etc/hiera.yaml')
+transformations = hiera.lookup(
+                    'network_scheme', {}, {},
+                    order_override = nil,
+                    resolution_type = :hash
+                  )['transformations']
+
+unless transformations.is_a?(Array)
+  puts "ERROR: Network tranformations not found in Hiera"
+  exit 1
+end
+
+transformations.each do |t|
+  if t["action"] == "add-port" and t["provider"] == "sriov"
+    int = t["name"]
+    begin
+      if File.exist?("/sys/class/net/#{int}/device/sriov_totalvfs") and
+        File.readlink("/sys/class/net/#{int}/device/iommu_group") !=
+        File.readlink("/sys/class/net/#{int}/device/virtfn0/iommu_group") and
+        Dir["/sys/class/net/#{int}/device/virtfn0/iommu_group/devices/*:*"].length == 1
+
+        puts "OK: SR-IOV and IOMMU are properly configured for #{int} interface"
+      else
+        puts "ERROR: SR-IOV and IOMMU are not properly configured for #{int} interface"
+        errors += 1
+      end
+    rescue
+      puts "ERROR: Was not able to check SR-IOV and IOMMU for #{int} interface"
+      errors += 1
+    end
+  end
+end
+
+exit 1 unless errors == 0

deployment/puppet/osnailyfacter/modular/netconfig/tasks.yaml

@@ -27,6 +27,16 @@
     timeout: 3600
     cwd: /
 
+- id: sriov_iommu_check
+  type: shell
+  version: 2.0.0
+  groups: [compute]
+  requires: [netconfig]
+  required_for: [firewall, hosts]
+  parameters:
+    cmd: ruby /etc/puppet/modules/osnailyfacter/modular/netconfig/sriov_iommu_check.rb
+    timeout: 30
+
 - id: reserved_ports
   type: puppet
   version: 2.0.0