rust: block: introduce `kernel::block::mq` module
Add initial abstractions for working with blk-mq.
This patch is a maintained, refactored subset of code originally published
by Wedson Almeida Filho <wedsonaf@gmail.com> [1].
[1] https://github.com/wedsonaf/linux/tree/f2cfd2fe0e2ca4e90994f96afe268bbd4382a891/rust/kernel/blk/mq.rs
Cc: Wedson Almeida Filho <wedsonaf@gmail.com>
Signed-off-by: Andreas Hindborg <a.hindborg@samsung.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20240611114551.228679-2-nmi@metaspace.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/rust/kernel/error.rs b/rust/kernel/error.rs
index 55280ae..145f5c3 100644
--- a/rust/kernel/error.rs
+++ b/rust/kernel/error.rs
@@ -126,6 +126,12 @@ pub fn to_errno(self) -> core::ffi::c_int {
self.0
}
+ #[cfg(CONFIG_BLOCK)]
+ pub(crate) fn to_blk_status(self) -> bindings::blk_status_t {
+ // SAFETY: `self.0` is a valid error due to its invariant.
+ unsafe { bindings::errno_to_blk_status(self.0) }
+ }
+
/// Returns the error encoded as a pointer.
#[allow(dead_code)]
pub(crate) fn to_ptr<T>(self) -> *mut T {
