compat: add #[non_exhaustive] attribute comments on enums

These are tied to kernel capabilities and new items might be added in
the future.

Author: mathstuf

keyutils-raw/src/types.rs

@@ -43,6 +43,7 @@ pub type TimeoutSeconds = libc::c_uint;
 /// Keys which are implicitly required via syscalls and other operations are
 /// placed in the default keyring.
 #[derive(Debug, PartialEq, Eq)]
+// #[non_exhaustive]
 pub enum DefaultKeyring {
     /// Do not change the default keyring.
     ///

src/constants.rs

@@ -29,6 +29,7 @@ use keyutils_raw::*;
 
 /// Special keyrings predefined for a process.
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
+// #[non_exhaustive]
 pub enum SpecialKeyring {
     /// A thread-specific keyring.
     Thread,

src/keytypes/asymmetric.rs

@@ -60,6 +60,7 @@ impl KeyType for Asymmetric {
 
 /// A restriction that may be placed onto a keyring using an asymmetric key.
 #[derive(Debug, Clone, PartialEq, Eq)]
+// #[non_exhaustive]
 pub enum AsymmetricRestriction {
     /// Only allow keys which have been signed by a key on the builtin trusted keyring.
     BuiltinTrusted,

src/keytypes/blacklist.rs

@@ -48,6 +48,7 @@ impl KeyType for Blacklist {
 
 /// The hash type to blacklist.
 #[derive(Debug, Clone, Eq)]
+// #[non_exhaustive]
 pub enum HashType {
     /// x509 data
     Tbs,

src/keytypes/dns_resolver.rs

@@ -45,6 +45,7 @@ impl KeyType for DnsResolver {
 
 /// The DNS record to lookup.
 #[derive(Debug, Clone, Eq)]
+// #[non_exhaustive]
 pub enum QueryType {
     /// An IPv4 address.
     A,

src/keytypes/encrypted.rs

@@ -52,6 +52,7 @@ impl KeyType for Encrypted {
 
 /// The format of the encrypted payload.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+// #[non_exhaustive]
 pub enum Format {
     /// A free-form encrypted key.
     Default,
@@ -88,6 +89,7 @@ impl Default for Format {
 ///
 /// This indicates the key type to use for encryting the generatetd key.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+// #[non_exhaustive]
 pub enum MasterKeyType {
     /// A trusted key.
     ///
@@ -111,6 +113,7 @@ impl MasterKeyType {
 
 /// The payload for an encrypted key.
 #[derive(Debug, Clone, PartialEq, Eq)]
+// #[non_exhaustive]
 pub enum Payload {
     /// Create a new key.
     ///

src/keytypes/trusted.rs

@@ -48,6 +48,7 @@ impl KeyType for Trusted {
 
 /// Hashes supported by TPM devices.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+// #[non_exhaustive]
 pub enum TpmHash {
     /// SHA-1
     Sha1,
@@ -164,6 +165,7 @@ impl fmt::Display for TrustedOptions {
 
 /// The payload for trusted keys.
 #[derive(Debug, Clone, PartialEq, Eq)]
+// #[non_exhaustive]
 pub enum Payload {
     /// Create a new key.
     ///