rust_binder: Update transaction flags to use kernel::impl_flags!

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Transaction configuration flags are currently represented as raw integers
and manipulated via bitwise operations. This lacks type safety, making
it possible to mix up different flag types without compile-time warnings.

Use kernel::impl_flags! to migrate the transaction flags to a
strongly-typed bitmask, enforcing compile-time safety.

Key changes:
- Define `TransactionFlags(u32)` and `TransactionFlag` with 4 variants.
- Change flags field type to `TransactionFlags` in structs.
- Add `is_oneway` helper on `TransactionFlags` to simplify checks.
- Update `can_replace` logic to use type-safe combined flag checks.
- Convert `flags` to `u32` for FFI boundaries and logging.

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Jahnavi MN <jahnavimn@google.com>
Link: https://patch.msgid.link/20260719-b4-rust_binder_impl_flags-v3-2-f8d0b3ea1b87@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Jahnavi MN 2026-07-19 11:51:10 +00:00 • committed by Greg Kroah-Hartman

parent d6e8b74fe7

commit 0649be3cc4

2 changed files with 46 additions and 18 deletions

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6

drivers/android/binder/thread.rs

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58

drivers/android/binder/transaction.rs

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