| f74cf399 | 22-Oct-2025 |
Boqun Feng <boqun.feng@gmail.com> |
rust: debugfs: Replace the usage of Rust native atomics
Rust native atomics are not allowed to use in kernel due to the mismatch
of memory model with Linux kernel memory model, hence remove the usag
rust: debugfs: Replace the usage of Rust native atomics
Rust native atomics are not allowed to use in kernel due to the mismatch
of memory model with Linux kernel memory model, hence remove the usage
of Rust native atomics in debufs.
Reviewed-by: Matthew Maurer <mmaurer@google.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Tested-by: David Gow <davidgow@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://patch.msgid.link/20251022035324.70785-4-boqun.feng@gmail.com
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| 0bc60571 | 07-Nov-2025 |
Danilo Krummrich <dakr@kernel.org> |
rust: debugfs: Implement BinaryReader for Mutex<T> only when T is Unpin
Commit da123f0ee40f ("rust: lock: guard: Add T: Unpin bound to
DerefMut") from tip/master adds an Unpin bound to T for Mutex<T
rust: debugfs: Implement BinaryReader for Mutex<T> only when T is Unpin
Commit da123f0ee40f ("rust: lock: guard: Add T: Unpin bound to
DerefMut") from tip/master adds an Unpin bound to T for Mutex<T>, hence
also restrict the implementation of BinaryReader for Mutex<T>
accordingly.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/all/20251107134144.117905bd@canb.auug.org.au/
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://patch.msgid.link/20251107091612.2557480-1-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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| a9fca8a7 | 22-Oct-2025 |
Danilo Krummrich <dakr@kernel.org> |
rust: debugfs: support blobs from smart pointers
Extend Rust debugfs binary support to allow exposing data stored in
common smart pointers and heap-allocated collections.
- Implement BinaryWriter f
rust: debugfs: support blobs from smart pointers
Extend Rust debugfs binary support to allow exposing data stored in
common smart pointers and heap-allocated collections.
- Implement BinaryWriter for Box<T>, Pin<Box<T>>, Arc<T>, and Vec<T>.
- Introduce BinaryReaderMut for mutable binary access with outer locks.
- Implement BinaryReaderMut for Box<T>, Vec<T>, and base types.
- Update BinaryReader to delegate to BinaryReaderMut for Mutex<T>,
Box<T>, Pin<Box<T>> and Arc<T>.
This enables debugfs files to directly expose or update data stored
inside heap-allocated, reference-counted, or lock-protected containers
without manual dereferencing or locking.
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Matthew Maurer <mmaurer@google.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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| 3b83f5d5 | 18-Oct-2025 |
Tamir Duberstein <tamird@gmail.com> |
rust: replace `CStr` with `core::ffi::CStr`
`kernel::ffi::CStr` was introduced in commit d126d2380131 ("rust: str:
add `CStr` type") in November 2022 as an upstreaming of earlier work
that was done
rust: replace `CStr` with `core::ffi::CStr`
`kernel::ffi::CStr` was introduced in commit d126d2380131 ("rust: str:
add `CStr` type") in November 2022 as an upstreaming of earlier work
that was done in May 2021[0]. That earlier work, having predated the
inclusion of `CStr` in `core`, largely duplicated the implementation of
`std::ffi::CStr`.
`std::ffi::CStr` was moved to `core::ffi::CStr` in Rust 1.64 in
September 2022. Hence replace `kernel::str::CStr` with `core::ffi::CStr`
to reduce our custom code footprint, and retain needed custom
functionality through an extension trait.
Add `CStr` to `ffi` and the kernel prelude.
Link: https://github.com/Rust-for-Linux/linux/commit/faa3cbcca03d0dec8f8e43f1d8d5c0860d98a23f [0]
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Benno Lossin <lossin@kernel.org>
Signed-off-by: Tamir Duberstein <tamird@gmail.com>
Link: https://patch.msgid.link/20251018-cstr-core-v18-16-9378a54385f8@gmail.com
[ Removed assert that would now depend on the Rust version. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
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| 5f094258 | 04-Sep-2025 |
Matthew Maurer <mmaurer@google.com> |
rust: debugfs: Add support for scoped directories
Introduces the concept of a `ScopedDir`, which allows for the creation
of debugfs directories and files that are tied to the lifetime of a
particula
rust: debugfs: Add support for scoped directories
Introduces the concept of a `ScopedDir`, which allows for the creation
of debugfs directories and files that are tied to the lifetime of a
particular data structure. This ensures that debugfs entries do not
outlive the data they refer to.
The new `Dir::scope` method creates a new directory that is owned by a
`Scope` handle. All files and subdirectories created within this scope
are automatically cleaned up when the `Scope` is dropped.
Signed-off-by: Matthew Maurer <mmaurer@google.com>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250904-debugfs-rust-v11-6-7d12a165685a@google.com
[ Fix up Result<(), Error> -> Result; fix spurious backtick in
doc-comment. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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| 40ecc494 | 04-Sep-2025 |
Matthew Maurer <mmaurer@google.com> |
rust: debugfs: Add support for callback-based files
Extends the `debugfs` API to support creating files with content
generated and updated by callbacks. This is done via the
`read_callback_file`, `w
rust: debugfs: Add support for callback-based files
Extends the `debugfs` API to support creating files with content
generated and updated by callbacks. This is done via the
`read_callback_file`, `write_callback_file`, and
`read_write_callback_file` methods.
These methods allow for more flexible file definition, either because
the type already has a `Writer` or `Reader` method that doesn't
do what you'd like, or because you cannot implement it (e.g. because
it's a type defined in another crate or a primitive type).
Signed-off-by: Matthew Maurer <mmaurer@google.com>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250904-debugfs-rust-v11-4-7d12a165685a@google.com
[ Fix up Result<(), Error> -> Result. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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| 839dc1d1 | 04-Sep-2025 |
Matthew Maurer <mmaurer@google.com> |
rust: debugfs: Add support for writable files
Extends the `debugfs` API to support creating writable files. This
is done via the `Dir::write_only_file` and `Dir::read_write_file`
methods, which take
rust: debugfs: Add support for writable files
Extends the `debugfs` API to support creating writable files. This
is done via the `Dir::write_only_file` and `Dir::read_write_file`
methods, which take a data object that implements the `Reader`
trait.
Signed-off-by: Matthew Maurer <mmaurer@google.com>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250904-debugfs-rust-v11-3-7d12a165685a@google.com
[ Fix up Result<()> -> Result. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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| 5e40b591 | 04-Sep-2025 |
Matthew Maurer <mmaurer@google.com> |
rust: debugfs: Add support for read-only files
Extends the `debugfs` API to support creating read-only files. This
is done via the `Dir::read_only_file` method, which takes a data object
that implem
rust: debugfs: Add support for read-only files
Extends the `debugfs` API to support creating read-only files. This
is done via the `Dir::read_only_file` method, which takes a data object
that implements the `Writer` trait.
The file's content is generated by the `Writer` implementation, and the
file is automatically removed when the returned `File` handle is
dropped.
Signed-off-by: Matthew Maurer <mmaurer@google.com>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250904-debugfs-rust-v11-2-7d12a165685a@google.com
[ Fixup build failure when CONFIG_DEBUGFS=n. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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