Add a new method to get the size of a request in number of sectors.

Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
---
 rust/kernel/block/mq/request.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/rust/kernel/block/mq/request.rs b/rust/kernel/block/mq/request.rs
index 0dd329ae93dfc..9d11ae5651983 100644
--- a/rust/kernel/block/mq/request.rs
+++ b/rust/kernel/block/mq/request.rs
@@ -144,6 +144,13 @@ pub fn sector(&self) -> usize {
         unsafe { (*self.0.get()).__sector as usize }
     }
 
+    /// Get the size of the request in number of sectors.
+    #[inline(always)]
+    pub fn sectors(&self) -> usize {
+        // SAFETY: By type invariant of `Self`, `self.0` is valid and live.
+        (unsafe { (*self.0.get()).__data_len as usize }) >> crate::block::SECTOR_SHIFT
+    }
+
     /// Return a pointer to the [`RequestDataWrapper`] stored in the private area
     /// of the request structure.
     ///

-- 
2.51.2