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From: Andreas Hindborg <a.hindborg@kernel.org>
To: "Boqun Feng" <boqun.feng@gmail.com>,
	"Jens Axboe" <axboe@kernel.dk>, "Miguel Ojeda" <ojeda@kernel.org>,
	"Gary Guo" <gary@garyguo.net>,
	"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
	"Benno Lossin" <lossin@kernel.org>,
	"Alice Ryhl" <aliceryhl@google.com>,
	"Trevor Gross" <tmgross@umich.edu>,
	"Danilo Krummrich" <dakr@kernel.org>,
	"FUJITA Tomonori" <fujita.tomonori@gmail.com>,
	"Frederic Weisbecker" <frederic@kernel.org>,
	"Lyude Paul" <lyude@redhat.com>,
	"Thomas Gleixner" <tglx@kernel.org>,
	"Anna-Maria Behnsen" <anna-maria@linutronix.de>,
	"John Stultz" <jstultz@google.com>,
	"Stephen Boyd" <sboyd@kernel.org>,
	"Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
	"Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: linux-block@vger.kernel.org, rust-for-linux@vger.kernel.org,
	 linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	 Andreas Hindborg <a.hindborg@kernel.org>
Subject: [PATCH 23/79] block: rust: change sector type from usize to u64
Date: Mon, 16 Feb 2026 00:35:10 +0100	[thread overview]
Message-ID: <20260216-rnull-v6-19-rc5-send-v1-23-de9a7af4b469@kernel.org> (raw)
In-Reply-To: <20260216-rnull-v6-19-rc5-send-v1-0-de9a7af4b469@kernel.org>

Change the `sector()` and `sectors()` methods in `Request` to return
`u64` and `u32` respectively instead of `usize`. This matches the
underlying kernel types.

Update rnull driver to handle the new sector types with appropriate
casting throughout the read, write, and discard operations.

Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
---
 drivers/block/rnull/rnull.rs    | 49 +++++++++++++++++++++--------------------
 rust/kernel/block/mq/request.rs |  8 +++----
 2 files changed, 29 insertions(+), 28 deletions(-)

diff --git a/drivers/block/rnull/rnull.rs b/drivers/block/rnull/rnull.rs
index 9a301b06fc5e0..b0008e2f9c398 100644
--- a/drivers/block/rnull/rnull.rs
+++ b/drivers/block/rnull/rnull.rs
@@ -225,7 +225,7 @@ fn new(options: NullBlkOptions<'_>) -> Result<GenDisk<Self>> {
                 irq_mode,
                 completion_time,
                 memory_backed,
-                block_size: block_size as usize,
+                block_size: block_size.into(),
             }),
             GFP_KERNEL,
         )?;
@@ -246,54 +246,55 @@ fn new(options: NullBlkOptions<'_>) -> Result<GenDisk<Self>> {
     }
 
     #[inline(always)]
-    fn write(tree: &Tree, mut sector: usize, mut segment: Segment<'_>) -> Result {
+    fn write(tree: &Tree, mut sector: u64, mut segment: Segment<'_>) -> Result {
         while !segment.is_empty() {
             let page = NullBlockPage::new()?;
             let mut tree = tree.lock();
 
             let page_idx = sector >> block::PAGE_SECTORS_SHIFT;
 
-            let page = if let Some(page) = tree.get_mut(page_idx) {
+            let page = if let Some(page) = tree.get_mut(page_idx as usize) {
                 page
             } else {
-                tree.store(page_idx, page, GFP_NOIO)?;
-                tree.get_mut(page_idx).unwrap()
+                tree.store(page_idx as usize, page, GFP_NOIO)?;
+                tree.get_mut(page_idx as usize).unwrap()
             };
 
             page.set_occupied(sector);
-            let page_offset = (sector & block::SECTOR_MASK as usize) << block::SECTOR_SHIFT;
-            sector +=
-                segment.copy_to_page(page.page.get_pin_mut(), page_offset) >> block::SECTOR_SHIFT;
+            let page_offset = (sector & u64::from(block::SECTOR_MASK)) << block::SECTOR_SHIFT;
+            sector += segment.copy_to_page(page.page.get_pin_mut(), page_offset as usize) as u64
+                >> block::SECTOR_SHIFT;
         }
         Ok(())
     }
 
     #[inline(always)]
-    fn read(tree: &Tree, mut sector: usize, mut segment: Segment<'_>) -> Result {
+    fn read(tree: &Tree, mut sector: u64, mut segment: Segment<'_>) -> Result {
         let tree = tree.lock();
 
         while !segment.is_empty() {
             let idx = sector >> block::PAGE_SECTORS_SHIFT;
 
-            if let Some(page) = tree.get(idx) {
-                let page_offset = (sector & block::SECTOR_MASK as usize) << block::SECTOR_SHIFT;
-                sector += segment.copy_from_page(&page.page, page_offset) >> block::SECTOR_SHIFT;
+            if let Some(page) = tree.get(idx as usize) {
+                let page_offset = (sector & u64::from(block::SECTOR_MASK)) << block::SECTOR_SHIFT;
+                sector += segment.copy_from_page(&page.page, page_offset as usize) as u64
+                    >> block::SECTOR_SHIFT;
             } else {
-                sector += segment.zero_page() >> block::SECTOR_SHIFT;
+                sector += segment.zero_page() as u64 >> block::SECTOR_SHIFT;
             }
         }
 
         Ok(())
     }
 
-    fn discard(tree: &Tree, mut sector: usize, sectors: usize, block_size: usize) -> Result {
+    fn discard(tree: &Tree, mut sector: u64, sectors: u64, block_size: u64) -> Result {
         let mut remaining_bytes = sectors << SECTOR_SHIFT;
         let mut tree = tree.lock();
 
         while remaining_bytes > 0 {
             let page_idx = sector >> block::PAGE_SECTORS_SHIFT;
             let mut remove = false;
-            if let Some(page) = tree.get_mut(page_idx) {
+            if let Some(page) = tree.get_mut(page_idx as usize) {
                 page.set_free(sector);
                 if page.is_empty() {
                     remove = true;
@@ -301,7 +302,7 @@ fn discard(tree: &Tree, mut sector: usize, sectors: usize, block_size: usize) ->
             }
 
             if remove {
-                drop(tree.remove(page_idx))
+                drop(tree.remove(page_idx as usize))
             }
 
             let processed = remaining_bytes.min(block_size);
@@ -316,7 +317,7 @@ fn discard(tree: &Tree, mut sector: usize, sectors: usize, block_size: usize) ->
     fn transfer(
         command: bindings::req_op,
         tree: &Tree,
-        sector: usize,
+        sector: u64,
         segment: Segment<'_>,
     ) -> Result {
         match command {
@@ -346,13 +347,13 @@ fn new() -> Result<KBox<Self>> {
         )?)
     }
 
-    fn set_occupied(&mut self, sector: usize) {
-        let idx = sector & SECTOR_MASK as usize;
+    fn set_occupied(&mut self, sector: u64) {
+        let idx = sector & u64::from(SECTOR_MASK);
         self.status |= 1 << idx;
     }
 
-    fn set_free(&mut self, sector: usize) {
-        let idx = sector & SECTOR_MASK as usize;
+    fn set_free(&mut self, sector: u64) {
+        let idx = sector & u64::from(SECTOR_MASK);
         self.status &= !(1 << idx);
     }
 
@@ -371,7 +372,7 @@ struct QueueData {
     irq_mode: IRQMode,
     completion_time: Delta,
     memory_backed: bool,
-    block_size: usize,
+    block_size: u64,
 }
 
 #[pin_data]
@@ -422,14 +423,14 @@ fn queue_rq(
             let mut sector = rq.sector();
 
             if command == bindings::req_op_REQ_OP_DISCARD {
-                Self::discard(tree, sector, rq.sectors(), queue_data.block_size)?;
+                Self::discard(tree, sector, rq.sectors().into(), queue_data.block_size)?;
             } else {
                 for bio in rq.bio_iter_mut() {
                     let segment_iter = bio.segment_iter();
                     for segment in segment_iter {
                         let length = segment.len();
                         Self::transfer(command, tree, sector, segment)?;
-                        sector += length as usize >> block::SECTOR_SHIFT;
+                        sector += u64::from(length) >> block::SECTOR_SHIFT;
                     }
                 }
             }
diff --git a/rust/kernel/block/mq/request.rs b/rust/kernel/block/mq/request.rs
index 9d11ae5651983..8fe7e126c522a 100644
--- a/rust/kernel/block/mq/request.rs
+++ b/rust/kernel/block/mq/request.rs
@@ -139,16 +139,16 @@ pub fn bio_iter_mut<'a>(self: &'a mut Owned<Self>) -> BioIterator<'a> {
 
     /// Get the target sector for the request.
     #[inline(always)]
-    pub fn sector(&self) -> usize {
+    pub fn sector(&self) -> u64 {
         // SAFETY: By type invariant of `Self`, `self.0` is valid and live.
-        unsafe { (*self.0.get()).__sector as usize }
+        unsafe { (*self.0.get()).__sector }
     }
 
     /// Get the size of the request in number of sectors.
     #[inline(always)]
-    pub fn sectors(&self) -> usize {
+    pub fn sectors(&self) -> u32 {
         // SAFETY: By type invariant of `Self`, `self.0` is valid and live.
-        (unsafe { (*self.0.get()).__data_len as usize }) >> crate::block::SECTOR_SHIFT
+        (unsafe { (*self.0.get()).__data_len }) >> crate::block::SECTOR_SHIFT
     }
 
     /// Return a pointer to the [`RequestDataWrapper`] stored in the private area

-- 
2.51.2




  parent reply	other threads:[~2026-02-16  4:14 UTC|newest]

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-15 23:34 [PATCH 00/79] block: rnull: complete the rust null block driver Andreas Hindborg
2026-02-15 23:34 ` [PATCH 01/79] block: rnull: adopt new formatting guidelines Andreas Hindborg
2026-02-15 23:34 ` [PATCH 02/79] block: rnull: add module parameters Andreas Hindborg
2026-02-15 23:34 ` [PATCH 03/79] block: rnull: add macros to define configfs attributes Andreas Hindborg
2026-02-15 23:34 ` [PATCH 04/79] block: rust: fix generation of bindings to `BLK_STS_.*` Andreas Hindborg
2026-02-15 23:34 ` [PATCH 05/79] block: rust: change `queue_rq` request type to `Owned` Andreas Hindborg
2026-02-15 23:34 ` [PATCH 06/79] block: rust: add `Request` private data support Andreas Hindborg
2026-02-15 23:34 ` [PATCH 07/79] block: rust: allow `hrtimer::Timer` in `RequestData` Andreas Hindborg
2026-02-15 23:34 ` [PATCH 08/79] block: rnull: add timer completion mode Andreas Hindborg
2026-02-15 23:34 ` [PATCH 09/79] block: rust: introduce `kernel::block::bio` module Andreas Hindborg
2026-02-15 23:34 ` [PATCH 10/79] block: rust: add `command` getter to `Request` Andreas Hindborg
2026-02-15 23:34 ` [PATCH 11/79] block: rust: mq: use GFP_KERNEL from prelude Andreas Hindborg
2026-02-15 23:34 ` [PATCH 12/79] block: rust: add `TagSet` flags Andreas Hindborg
2026-02-15 23:35 ` [PATCH 13/79] block: rnull: add memory backing Andreas Hindborg
2026-02-15 23:35 ` [PATCH 14/79] block: rnull: add submit queue count config option Andreas Hindborg
2026-02-15 23:35 ` [PATCH 15/79] block: rnull: add `use_per_node_hctx` " Andreas Hindborg
2026-02-15 23:35 ` [PATCH 16/79] block: rust: allow specifying home node when constructing `TagSet` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 17/79] block: rnull: allow specifying the home numa node Andreas Hindborg
2026-02-15 23:35 ` [PATCH 18/79] block: rust: add Request::sectors() method Andreas Hindborg
2026-02-15 23:35 ` [PATCH 19/79] block: rust: mq: add max_hw_discard_sectors support to GenDiskBuilder Andreas Hindborg
2026-02-15 23:35 ` [PATCH 20/79] block: rnull: add discard support Andreas Hindborg
2026-02-15 23:35 ` [PATCH 21/79] block: rust: add `NoDefaultScheduler` flag for `TagSet` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 22/79] block: rnull: add no_sched module parameter and configfs attribute Andreas Hindborg
2026-02-15 23:35 ` Andreas Hindborg [this message]
2026-02-15 23:35 ` [PATCH 24/79] block: rust: add `BadBlocks` for bad block tracking Andreas Hindborg
2026-02-15 23:35 ` [PATCH 25/79] block: rust: mq: add Request::end() method for custom status codes Andreas Hindborg
2026-02-15 23:35 ` [PATCH 26/79] block: rnull: add badblocks support Andreas Hindborg
2026-02-15 23:35 ` [PATCH 27/79] block: rnull: add badblocks_once support Andreas Hindborg
2026-02-15 23:35 ` [PATCH 28/79] block: rnull: add partial I/O support for bad blocks Andreas Hindborg
2026-02-15 23:35 ` [PATCH 29/79] block: rust: add `TagSet` private data support Andreas Hindborg
2026-02-15 23:35 ` [PATCH 30/79] block: rust: add `hctx` " Andreas Hindborg
2026-02-15 23:35 ` [PATCH 31/79] block: rnull: add volatile cache emulation Andreas Hindborg
2026-02-15 23:35 ` [PATCH 32/79] block: rust: implement `Sync` for `GenDisk` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 33/79] block: rust: add a back reference feature to `GenDisk` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 34/79] block: rust: introduce an idle type state for `Request` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 35/79] block: rust: add a request queue abstraction Andreas Hindborg
2026-02-15 23:35 ` [PATCH 36/79] block: rust: add a method to get the request queue for a request Andreas Hindborg
2026-02-15 23:35 ` [PATCH 37/79] block: rust: introduce `kernel::block::error` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 38/79] block: rust: require `queue_rq` to return a `BlkResult` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 39/79] block: rust: add `GenDisk::queue_data` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 40/79] block: rnull: add bandwidth limiting Andreas Hindborg
2026-02-15 23:35 ` [PATCH 41/79] block: rnull: add blocking queue mode Andreas Hindborg
2026-02-15 23:35 ` [PATCH 42/79] block: rnull: add shared tags Andreas Hindborg
2026-02-15 23:35 ` [PATCH 43/79] block: rnull: add queue depth config option Andreas Hindborg
2026-02-15 23:35 ` [PATCH 44/79] block: rust: add an abstraction for `bindings::req_op` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 45/79] block: rust: add a method to set the target sector of a request Andreas Hindborg
2026-02-15 23:35 ` [PATCH 46/79] block: rust: move gendisk vtable construction to separate function Andreas Hindborg
2026-02-15 23:35 ` [PATCH 47/79] block: rust: add zoned block device support Andreas Hindborg
2026-02-15 23:35 ` [PATCH 48/79] block: rnull: add zoned storage support Andreas Hindborg
2026-02-15 23:35 ` [PATCH 49/79] block: rust: add `map_queues` support Andreas Hindborg
2026-02-15 23:35 ` [PATCH 50/79] block: rust: add an abstraction for `struct blk_mq_queue_map` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 51/79] block: rust: add polled completion support Andreas Hindborg
2026-02-15 23:35 ` [PATCH 52/79] block: rust: add accessors to `TagSet` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 53/79] block: rnull: add polled completion support Andreas Hindborg
2026-02-15 23:35 ` [PATCH 54/79] block: rnull: add REQ_OP_FLUSH support Andreas Hindborg
2026-02-15 23:35 ` [PATCH 55/79] block: rust: add request flags abstraction Andreas Hindborg
2026-02-15 23:35 ` [PATCH 56/79] block: rust: add abstraction for block queue feature flags Andreas Hindborg
2026-02-15 23:35 ` [PATCH 57/79] block: rust: allow setting write cache and FUA flags for `GenDisk` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 58/79] block: rust: add `Segment::copy_to_page_limit` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 59/79] block: rnull: add fua support Andreas Hindborg
2026-02-15 23:35 ` [PATCH 60/79] block: fix arg type in `blk_mq_update_nr_hw_queues` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 61/79] block: rust: add `GenDisk::tag_set` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 62/79] block: rust: add `TagSet::update_hw_queue_count` Andreas Hindborg
2026-02-16 23:59   ` Ken Kurematsu
2026-02-17  9:54     ` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 63/79] block: rnull: add an option to change the number of hardware queues Andreas Hindborg
2026-02-15 23:35 ` [PATCH 64/79] block: rust: add an abstraction for `struct rq_list` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 65/79] block: rust: add `queue_rqs` vtable hook Andreas Hindborg
2026-02-15 23:35 ` [PATCH 66/79] block: rnull: support queue_rqs Andreas Hindborg
2026-02-15 23:35 ` [PATCH 67/79] block: rust: remove the `is_poll` parameter from `queue_rq` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 68/79] block: rust: add a debug assert for refcounts Andreas Hindborg
2026-02-15 23:35 ` [PATCH 69/79] block: rust: add `TagSet::tag_to_rq` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 70/79] block: rust: add `Request::queue_index` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 71/79] block: rust: add `Request::requeue` Andreas Hindborg
2026-02-15 23:35 ` [PATCH 72/79] block: rust: add `request_timeout` hook Andreas Hindborg
2026-02-15 23:36 ` [PATCH 73/79] block: rnull: add fault injection support Andreas Hindborg
2026-02-15 23:36 ` [PATCH 74/79] block: rust: add max_sectors option to `GenDiskBuilder` Andreas Hindborg
2026-02-15 23:36 ` [PATCH 75/79] block: rnull: allow configuration of the maximum IO size Andreas Hindborg
2026-02-15 23:36 ` [PATCH 76/79] block: rust: add `virt_boundary_mask` option to `GenDiskBuilder` Andreas Hindborg
2026-02-15 23:36 ` [PATCH 77/79] block: rnull: add `virt_boundary` option Andreas Hindborg
2026-02-15 23:36 ` [PATCH 78/79] block: rnull: add `shared_tag_bitmap` config option Andreas Hindborg
2026-02-15 23:36 ` [PATCH 79/79] block: rnull: add zone offline and readonly configfs files Andreas Hindborg

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