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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
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