From c55aab30cdbe60732b163424244259152330a411 Mon Sep 17 00:00:00 2001
From: mulhern <amulhern@redhat.com>
Date: Wed, 13 Nov 2024 20:11:52 -0500
Subject: [PATCH] Use strum for StratSigblockVersion methods

Signed-off-by: mulhern <amulhern@redhat.com>
---
 .../strat_engine/metadata/static_header.rs    |  5 ++--
 src/engine/types/mod.rs                       | 28 ++-----------------
 2 files changed, 6 insertions(+), 27 deletions(-)

diff --git a/src/engine/strat_engine/metadata/static_header.rs b/src/engine/strat_engine/metadata/static_header.rs
index aeb8f45cd8..195562d1b7 100644
--- a/src/engine/strat_engine/metadata/static_header.rs
+++ b/src/engine/strat_engine/metadata/static_header.rs
@@ -497,7 +497,7 @@ impl StaticHeader {
         let mut buf = [0u8; bytes!(static_header_size::SIGBLOCK_SECTORS)];
         buf[4..20].clone_from_slice(STRAT_MAGIC);
         LittleEndian::write_u64(&mut buf[20..28], *self.blkdev_size.sectors());
-        buf[28] = u8::from(self.sigblock_version);
+        buf[28] = self.sigblock_version as u8;
         buf[32..64].clone_from_slice(uuid_to_string!(self.identifiers.pool_uuid).as_bytes());
         buf[64..96].clone_from_slice(uuid_to_string!(self.identifiers.device_uuid).as_bytes());
         LittleEndian::write_u64(&mut buf[96..104], *self.mda_size.sectors());
@@ -532,7 +532,8 @@ impl StaticHeader {
         let blkdev_size = BlockdevSize::new(Sectors(LittleEndian::read_u64(&buf[20..28])));
 
         let version_buf = buf[28];
-        let version = StratSigblockVersion::try_from(version_buf)?;
+        let version = StratSigblockVersion::from_repr(version_buf)
+            .ok_or_else(|| StratisError::Msg(format!("Unknown sigblock version: {version_buf}")))?;
 
         let pool_uuid = PoolUuid::parse_str(from_utf8(&buf[32..64])?)?;
         let dev_uuid = DevUuid::parse_str(from_utf8(&buf[64..96])?)?;
diff --git a/src/engine/types/mod.rs b/src/engine/types/mod.rs
index ed1b16b27d..1909d6487d 100644
--- a/src/engine/types/mod.rs
+++ b/src/engine/types/mod.rs
@@ -16,7 +16,7 @@ use std::{
 use libudev::EventType;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
-use strum_macros::{self, EnumString};
+use strum_macros::{self, EnumString, FromRepr};
 use uuid::Uuid;
 
 pub use crate::engine::{
@@ -475,31 +475,9 @@ impl UuidOrConflict {
     }
 }
 
-#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash, FromRepr)]
+#[repr(u8)]
 pub enum StratSigblockVersion {
     V1 = 1,
     V2 = 2,
 }
-
-impl TryFrom<u8> for StratSigblockVersion {
-    type Error = StratisError;
-
-    fn try_from(value: u8) -> Result<Self, Self::Error> {
-        match value {
-            1u8 => Ok(StratSigblockVersion::V1),
-            2u8 => Ok(StratSigblockVersion::V2),
-            _ => Err(StratisError::Msg(format!(
-                "Unknown sigblock version: {value}"
-            ))),
-        }
-    }
-}
-
-impl From<StratSigblockVersion> for u8 {
-    fn from(version: StratSigblockVersion) -> Self {
-        match version {
-            StratSigblockVersion::V1 => 1u8,
-            StratSigblockVersion::V2 => 2u8,
-        }
-    }
-}