Don't use more than 32 cpus for network queue affinities

IF we have more than 32 cpus, discard any cpus > 32 for network queue
cpu affinities.

Closes-Bug: 1461306
Change-Id: I6aff2af39f25a32c710d5cdf9708dad6b2a201c1

deployment/puppet/sysfs/lib/puppet/parser/functions/cpu_affinity_hex.rb

@@ -4,7 +4,13 @@ Generate a HEX value used to set network device rsp_cpus value
 EOS
   ) do |argv|
     number = argv[0].to_i
-    fail "Argument should be the CPU number - integer value!" unless number.to_s == argv[0]
+    fail "Argument should be the CPU number - positive integer value!" if number < 1
+    # sysfs is unable to use more than 8 bit mask for cpu affinity
+    # just use cpus 0-31 if > 32 cpus present
+    # TODO: Remove these lines when sysfs supports > 8 bit mask for affinity
+    if number > 32 then
+      number = 32
+    end
     ((2 ** number) - 1).to_s(16)
   end
 end

deployment/puppet/sysfs/spec/functions/cpu_affinity_hex_spec.rb

@@ -18,6 +18,15 @@ describe 'the cpu_affinity_hex function' do
     ).to eq '3'
   end
 
+  it 'should calculate HEX affinity value for more 32 cpu' do
+    expect(
+        scope.function_cpu_affinity_hex(%w(32))
+    ).to eq 'ffffffff'
+    expect(
+        scope.function_cpu_affinity_hex(%w(33))
+    ).to eq 'ffffffff'
+  end
+
   it 'should raise an error if there is less than 1 arguments' do
     expect {
       scope.function_cpu_affinity_hexs([])
@@ -30,4 +39,10 @@ describe 'the cpu_affinity_hex function' do
     }.to raise_error
   end
 
+  it 'should raise an error if value is negative integer' do
+    expect {
+      scope.function_cpu_affinity_hex(%w(-1))
+    }.to raise_error
+  end
+
 end