link: ipvlan: Change mode type from u16 to Enum.

Signed-off-by: xujunjie-cover <[email protected]>

src/link/link_info/ipvlan.rs

@@ -15,7 +15,7 @@ const IFLA_IPVLAN_FLAGS: u16 = 2;
 #[derive(Debug, PartialEq, Eq, Clone)]
 #[non_exhaustive]
 pub enum InfoIpVlan {
-    Mode(u16),
+    Mode(IpVlanMode),
     Flags(u16),
     Other(DefaultNla),
 }
@@ -32,7 +32,7 @@ impl Nla for InfoIpVlan {
     fn emit_value(&self, buffer: &mut [u8]) {
         use self::InfoIpVlan::*;
         match self {
-            Mode(value) => NativeEndian::write_u16(buffer, *value),
+            Mode(value) => NativeEndian::write_u16(buffer, (*value).into()),
             Flags(value) => NativeEndian::write_u16(buffer, *value),
             Other(nla) => nla.emit_value(buffer),
         }
@@ -54,7 +54,9 @@ impl<'a, T: AsRef<[u8]> + ?Sized> Parseable<NlaBuffer<&'a T>> for InfoIpVlan {
         let payload = buf.value();
         Ok(match buf.kind() {
             IFLA_IPVLAN_MODE => Mode(
-                parse_u16(payload).context("invalid IFLA_IPVLAN_MODE value")?,
+                parse_u16(payload)
+                .context("invalid IFLA_IPVLAN_MODE value")?
+                .into(),
             ),
             IFLA_IPVLAN_FLAGS => Flags(
                 parse_u16(payload)
@@ -66,3 +68,41 @@ impl<'a, T: AsRef<[u8]> + ?Sized> Parseable<NlaBuffer<&'a T>> for InfoIpVlan {
         })
     }
 }
+
+const IPVLAN_MODE_L2: u16 = 0;
+const IPVLAN_MODE_L3: u16 = 1;
+const IPVLAN_MODE_L3S: u16 = 2;
+
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[non_exhaustive]
+pub enum IpVlanMode {
+    L2,
+    L3,
+    L3S,
+    Other(u16),
+}
+
+impl From<u16> for IpVlanMode {
+    fn from(d: u16) -> Self {
+        match d {
+            IPVLAN_MODE_L2 => Self::L2,
+            IPVLAN_MODE_L3 => Self::L3,
+            IPVLAN_MODE_L3S => Self::L3S,
+            _ => {
+                log::warn!("Unknown IP VLAN mode {}", d);
+                Self::Other(d)
+            }
+        }
+    }
+}
+
+impl From<IpVlanMode> for u16 {
+    fn from(v: IpVlanMode) -> u16 {
+        match v {
+            IpVlanMode::L2 => IPVLAN_MODE_L2,
+            IpVlanMode::L3 => IPVLAN_MODE_L3,
+            IpVlanMode::L3S => IPVLAN_MODE_L3S,
+            IpVlanMode::Other(d) => d,
+        }
+    }
+}

src/link/link_info/mod.rs

@@ -45,7 +45,7 @@ pub use self::info_data::InfoData;
 pub use self::info_port::{InfoPortData, InfoPortKind};
 pub use self::infos::{InfoKind, LinkInfo};
 pub use self::ipoib::InfoIpoib;
-pub use self::ipvlan::InfoIpVlan;
+pub use self::ipvlan::{InfoIpVlan, IpVlanMode};
 pub use self::mac_vlan::{InfoMacVlan, InfoMacVtap, MacVlanMode, MacVtapMode};
 pub use self::macsec::{
     InfoMacSec, MacSecCipherId, MacSecOffload, MacSecValidate,

src/link/mod.rs

@@ -44,7 +44,7 @@ pub use self::link_info::{
     InfoGreTap, InfoGreTap6, InfoGreTun, InfoGreTun6, InfoGtp, InfoHsr,
     InfoIpVlan, InfoIpoib, InfoKind, InfoMacSec, InfoMacVlan, InfoMacVtap,
     InfoPortData, InfoPortKind, InfoSitTun, InfoTun, InfoVeth, InfoVlan,
-    InfoVrf, InfoVti, InfoVxlan, InfoXfrm, LinkInfo, LinkXstats,
+    InfoVrf, InfoVti, InfoVxlan, InfoXfrm, IpVlanMode, LinkInfo, LinkXstats,
     MacSecCipherId, MacSecOffload, MacSecValidate, MacVlanMode, MacVtapMode,
     MiiStatus, VlanQosMapping,
 };

src/link/tests/ipvlan.rs

@@ -4,8 +4,8 @@ use netlink_packet_utils::{Emitable, Parseable};
 
 use crate::link::link_flag::LinkFlags;
 use crate::link::{
-    InfoData, InfoIpVlan, InfoKind, LinkAttribute, LinkHeader, LinkInfo,
-    LinkLayerType, LinkMessage, LinkMessageBuffer,
+    InfoData, InfoIpVlan, InfoKind, IpVlanMode, LinkAttribute, LinkHeader,
+    LinkInfo, LinkLayerType, LinkMessage, LinkMessageBuffer,
 };
 use crate::AddressFamily;
 
@@ -30,7 +30,7 @@ fn test_ipvlan_link_info() {
         attributes: vec![LinkAttribute::LinkInfo(vec![
             LinkInfo::Kind(InfoKind::IpVlan),
             LinkInfo::Data(InfoData::IpVlan(vec![
-                InfoIpVlan::Mode(0),
+                InfoIpVlan::Mode(IpVlanMode::L2),
                 InfoIpVlan::Flags(2),
             ])),
         ])],