updates

crates/core/src/device/mod.rs

@@ -252,7 +252,11 @@ impl fmt::Display for ReadError {
 #[derive(Debug, Clone)]
 pub struct TimedRead {
     pub result: Result<usize, ReadError>,
+    /// Whole milliseconds, matching the C ABI.
     pub milliseconds: i32,
+    /// Higher precision duration for internal timing analysis.  Backends
+    /// that only know millisecond figures fill this with `ms * 1000`.
+    pub microseconds: i64,
 }
 
 /// Backend interface used by both the command line program and the C ABI.
@@ -318,7 +322,29 @@ pub trait Drive {
     fn set_bigendianp(&mut self, value: i32);
     fn nsectors(&self) -> i64;
     fn set_nsectors(&mut self, value: i64);
+    /// Enable or disable the low-level read retry loop.  Cache analysis
+    /// disables retries so that timing reflects the first access.
+    fn set_error_retry(&mut self, _enabled: bool) {}
     fn interface(&self) -> InterfaceKind;
+    /// Optional drive attributes exposed through the C ABI.
+    fn is_atapi(&self) -> bool {
+        false
+    }
+    fn is_mmc(&self) -> bool {
+        false
+    }
+    fn density(&self) -> u8 {
+        0
+    }
+    fn fua(&self) -> bool {
+        false
+    }
+    fn lun(&self) -> i32 {
+        0
+    }
+    fn adjust_ssize(&self) -> i64 {
+        1
+    }
     fn cdda_version(&self) -> &'static str {
         crate::VERSIONNUM
     }