[PATCH v12 0/2] rust: xarray: Add a minimal abstraction for XArray

Tamir Duberstein
2024-12-12T20:31:46Z

teststs

This is a reimagining relative to earlier versions[0] by Asahi Lina and
Maíra Canal.

It is needed to support rust-binder, though this version only provides
enough machinery to support rnull.

Link: https://lore.kernel.org/rust-for-linux/20240309235927.168915-2-mcanal@igalia.com/ [0]
---
Changes in v12:
- Import `core::ptr::NonNull`. (Alice Ryhl)
- Introduce `StoreError` to allow `?` to be used with `Guard::store`.
(Alice Ryhl)
- Replace `{crate,core}::ffi::c_ulong` and clarify TODO with respect to
`usize`. (Alice Ryhl)
- Drop `T: Sync` bound on `impl Sync for XArray<T>`. (Alice Ryhl)
- Reword `Send` and `Sync` safety comments to match the style used in
`lock.rs`. (Alice Ryhl and Andreas
Hindborg)
- Link to v11: https://lore.kernel.org/r/20241203-rust-xarray-bindings-v11-0-58a95d137ec2@gmail.com

Changes in v11:
- Consolidate imports. (Alice Ryhl)
- Use literal `0` rather than `MIN`. (Alice Ryhl)
- Use bulleted list in SAFETY comment. (Alice Ryhl)
- Document (un)locking behavior of `Guard::store`. (Alice Ryhl)
- Document Normal API behavior WRT `XA_ZERO_ENTRY`. (Alice Ryhl)
- Rewrite `unsafe impl Sync` SAFETY comment. (Andreas Hindborg)
- Link to v10: https://lore.kernel.org/r/20241120-rust-xarray-bindings-v10-0-a25b2b0bf582@gmail.com

Changes in v10:
- Guard::get takes &self instead of &mut self. (Andreas Hindborg)
- Guard is !Send. (Boqun Feng)
- Add Inspired-by tags. (Maíra Canal and Asahi Lina)
- Rebase on linux-next, use NotThreadSafe. (Alice Ryhl)
- Link to v9: https://lore.kernel.org/r/20241118-rust-xarray-bindings-v9-0-3219cdb53685@gmail.com

---
Tamir Duberstein (2):
rust: types: add `ForeignOwnable::PointedTo`
rust: xarray: Add an abstraction for XArray

rust/bindings/bindings_helper.h | 6 +
rust/helpers/helpers.c | 1 +
rust/helpers/xarray.c | 28 ++++
rust/kernel/alloc.rs | 5 +
rust/kernel/alloc/kbox.rs | 38 +++---
rust/kernel/lib.rs | 1 +
rust/kernel/miscdevice.rs | 6 +-
rust/kernel/sync/arc.rs | 21 +--
rust/kernel/types.rs | 46 ++++---
rust/kernel/xarray.rs | 287 ++++++++++++++++++++++++++++++++++++++++
10 files changed, 394 insertions(+), 45 deletions(-)
---
base-commit: fac04efc5c793dccbd07e2d59af9f90b7fc0dca4
change-id: 20241020-rust-xarray-bindings-bef514142968
prerequisite-change-id: 20241030-borrow-mut-75f181feef4c:v6
prerequisite-patch-id: f801fb31bb4f202b3327f5fdb50d3018e25347d1
prerequisite-patch-id: b57aa4f44b238d4cb80f00276a188d9ba0c743cc
prerequisite-patch-id: 2387ec5af1cc03614d3dff5a95cefcd243befd65
prerequisite-patch-id: 75e26dd500888d9a27f8eac3d8304eab8d75c366
prerequisite-patch-id: 7f845443f373f975a888f01c3761fe8aa04b8a3c
prerequisite-patch-id: 5a9856c7363b33f0adfe8658e076b35abf960d23

Best regards,
--
Tamir Duberstein <tamird@gmail.com>