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authorkarthik s <ksundara@redhat.com>2016-08-26 21:48:04 +0530
committerkarthik s <ksundara@redhat.com>2016-08-29 19:41:35 +0530
commiteec3bba44b5a7e09dba4d427bd0d3d71a4956a7a (patch)
treee5dd6531b22285007b24470c808f5e6df8d59af4 /lib/puppet/provider/sriov_vf_config
parent6a6aeaa95313bf78c0cf19cca6331bc1d23e6563 (diff)
Configure the numvfs for SRIOV interfaces
This patch shall create VFs via the PCI SYS interface. Default value : $::os_service_default Sample Format : ['eth0:4','eth2:128'] For values as in sample format, the sriov_numvfs config files for eth0 and eth2 will have the values 4 and 128 respectively The SR-IOV numvfs configuration shall be persisted in /sbin/ifup-local so that, during the bootup of the compute nodes, the numvfs configuration will be restored. Change-Id: I7450b904475bdf46498d9af633416b3eba12f761 Implements: blueprint tripleo-sriov Signed-off-by: karthik s <ksundara@redhat.com>
Diffstat (limited to 'lib/puppet/provider/sriov_vf_config')
-rw-r--r--lib/puppet/provider/sriov_vf_config/numvfs.rb57
1 files changed, 57 insertions, 0 deletions
diff --git a/lib/puppet/provider/sriov_vf_config/numvfs.rb b/lib/puppet/provider/sriov_vf_config/numvfs.rb
new file mode 100644
index 0000000..cfa663c
--- /dev/null
+++ b/lib/puppet/provider/sriov_vf_config/numvfs.rb
@@ -0,0 +1,57 @@
+Puppet::Type.type(:sriov_vf_config).provide(:numvfs) do
+ desc <<-EOT
+ The file /sys/class/net/<sriov_interface_name>/device/sriov_numvfs will be
+ present when a physical PCIe device supports SR-IOV. A number written to
+ this file will enable the specified number of VFs. This provider shall read
+ the file and ensure that the value is zero, before writing the number of
+ VFs that should be enabled. If the VFs needs to be disabled then we shall
+ write a zero to this file.
+ EOT
+
+ def create
+ if File.file?(sriov_numvfs_path)
+ _set_numvfs
+ else
+ fail("#{sriov_numvfs_path} doesn't exist. Check if #{sriov_get_interface} is a valid network interface supporting SR-IOV")
+ end
+ end
+
+ def destroy
+ if File.file?(sriov_numvfs_path)
+ File.write(sriov_numvfs_path,"0")
+ end
+ end
+
+ def exists?
+ if File.file?(sriov_numvfs_path)
+ cur_value = File.read(sriov_numvfs_path)
+ if cur_value.to_i == sriov_numvfs_value
+ return true
+ end
+ end
+ return false
+ end
+
+ def _set_numvfs
+ # During an update, the content of file sriov_numvfs_path has to be set
+ # to 0 (ZERO), before writing the actual value
+ cur_value = File.read(sriov_numvfs_path)
+ if cur_value != 0
+ File.write(sriov_numvfs_path,"0")
+ end
+ File.write(sriov_numvfs_path,sriov_numvfs_value)
+ end
+
+ def sriov_numvfs_path
+ "/sys/class/net/#{sriov_get_interface}/device/sriov_numvfs"
+ end
+
+ def sriov_get_interface
+ resource[:name].split(':', 2).first
+ end
+
+ def sriov_numvfs_value
+ resource[:name].split(':', 2).last.to_i
+ end
+
+end