uefi: fs: Add file times plumbing

- Add FileTimes implementation.

Signed-off-by: Ayush Singh <[email protected]>

Author: Ayush1325

library/std/src/sys/fs/uefi.rs

@@ -12,12 +12,28 @@ use crate::sys::unsupported;
 #[expect(dead_code)]
 const FILE_PERMISSIONS_MASK: u64 = r_efi::protocols::file::READ_ONLY;
 
+const ZERO_TIME: r_efi::efi::Time = r_efi::efi::Time {
+    year: 0,
+    month: 0,
+    day: 0,
+    hour: 0,
+    minute: 0,
+    second: 0,
+    nanosecond: 0,
+    timezone: 0,
+    daylight: 0,
+    pad1: 0,
+    pad2: 0,
+};
+
 pub struct File(!);
 
 #[derive(Clone)]
 pub struct FileAttr {
     attr: u64,
     size: u64,
+    created: r_efi::efi::Time,
+    times: FileTimes,
 }
 
 pub struct ReadDir(!);
@@ -32,8 +48,11 @@ pub struct OpenOptions {
     create_new: bool,
 }
 
-#[derive(Copy, Clone, Debug, Default)]
-pub struct FileTimes {}
+#[derive(Copy, Clone, Debug)]
+pub struct FileTimes {
+    accessed: r_efi::efi::Time,
+    modified: r_efi::efi::Time,
+}
 
 #[derive(Clone, PartialEq, Eq, Debug)]
 // Bool indicates if file is readonly
@@ -60,15 +79,15 @@ impl FileAttr {
     }
 
     pub fn modified(&self) -> io::Result<SystemTime> {
-        unsupported()
+        Ok(SystemTime::from_uefi(self.times.modified))
     }
 
     pub fn accessed(&self) -> io::Result<SystemTime> {
-        unsupported()
+        Ok(SystemTime::from_uefi(self.times.accessed))
     }
 
     pub fn created(&self) -> io::Result<SystemTime> {
-        unsupported()
+        Ok(SystemTime::from_uefi(self.created))
     }
 }
 
@@ -92,8 +111,21 @@ impl FilePermissions {
 }
 
 impl FileTimes {
-    pub fn set_accessed(&mut self, _t: SystemTime) {}
-    pub fn set_modified(&mut self, _t: SystemTime) {}
+    pub fn set_accessed(&mut self, t: SystemTime) {
+        self.accessed =
+            t.to_uefi(self.accessed.timezone, self.accessed.daylight).expect("Invalid Time");
+    }
+
+    pub fn set_modified(&mut self, t: SystemTime) {
+        self.modified =
+            t.to_uefi(self.modified.timezone, self.modified.daylight).expect("Invalid Time");
+    }
+}
+
+impl Default for FileTimes {
+    fn default() -> Self {
+        Self { modified: ZERO_TIME, accessed: ZERO_TIME }
+    }
 }
 
 impl FileType {

library/std/src/sys/pal/uefi/time.rs

@@ -70,7 +70,6 @@ impl SystemTime {
         Self(system_time_internal::from_uefi(&t))
     }
 
-    #[expect(dead_code)]
     pub(crate) const fn to_uefi(self, timezone: i16, daylight: u8) -> Option<r_efi::efi::Time> {
         system_time_internal::to_uefi(&self.0, timezone, daylight)
     }