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// This file is part of linux-support. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/linux-support/master/COPYRIGHT. No part of linux-support, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2020 The developers of linux-support. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/linux-support/master/COPYRIGHT.
/// Virtual Function (VF) index.
#[derive(Default, Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[derive(Deserialize, Serialize)]
#[repr(transparent)]
pub struct VirtualFunctionIndex(pub(crate) u8);
impl TryFrom<u8> for VirtualFunctionIndex
{
type Error = ParseNumberError;
#[inline(always)]
fn try_from(value: u8) -> Result<Self, Self::Error>
{
if unlikely!(value > Self::InclusiveMaximum.0)
{
Err(ParseNumberError::TooLarge)
}
else
{
Ok(Self(value))
}
}
}
impl VirtualFunctionIndex
{
/// Maximum value is capped by `u32::MAX - 1` as `u32::MAX` is used for `IFLA_NUM_VF` in route netlink's `RTM_GETLINK` message.
///
/// However, `ETHTOOL_RX_FLOW_SPEC_RING_VF` encodes a maximum of `255`, so the maximum value is `254`.
pub const InclusiveMaximum: Self = Self(254);
/// Exclusive maximum.
pub const ExclusiveMaximum: Self = Self(Self::InclusiveMaximum.0 + 1);
}