| From: |
| Danilo Krummrich <dakr-AT-kernel.org> |
| To: |
| gregkh-AT-linuxfoundation.org, rafael-AT-kernel.org, ojeda-AT-kernel.org, alex.gaynor-AT-gmail.com, boqun.feng-AT-gmail.com, gary-AT-garyguo.net, bjorn3_gh-AT-protonmail.com, lossin-AT-kernel.org, a.hindborg-AT-kernel.org, aliceryhl-AT-google.com, tmgross-AT-umich.edu, mmaurer-AT-google.com |
| Subject: |
| [PATCH v3 00/10] Binary Large Objects for Rust DebugFS |
| Date: |
| Wed, 22 Oct 2025 16:30:34 +0200 |
| Message-ID: |
| <20251022143158.64475-1-dakr@kernel.org> |
| Cc: |
| rust-for-linux-AT-vger.kernel.org, linux-fsdevel-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, Danilo Krummrich <dakr-AT-kernel.org> |
| Archive-link: |
| Article |
This series adds support for exposing binary large objects via Rust debugfs.
The first two patches extend UserSliceReader and UserSliceWriter with partial
read/write helpers.
The series further introduces read_binary_file(), write_binary_file() and
read_write_binary_file() methods for the Dir and ScopedDir types.
It also introduces the BinaryWriter and BinaryReader traits, which are used to
read/write the implementing type's binary representation with the help of the
backing file operations from/to debugfs.
Additional to some more generic blanked implementations for the BinaryWriter and
BinaryReader traits it also provides implementations for common smart pointer
types.
Both samples (file-based and scoped) are updated with corresponding examples.
A branch containing the patches can be found in [1].
[1] https://git.kernel.org/pub/scm/linux/kernel/git/dakr/linu...
Changes in v3:
- Add UserSliceReader::read_slice_file() and
UserSliceWriter::write_slice_file() taking an &mut file::Offset to
adjust it internally and make use of them.
- Add a new type file::Offset, rather than a type alias.
- Move affected delegate comments to previous patch.
- Add a brief comment for BinaryReadFile, BinaryWriteFile and
BinaryReadWriteFile.
Changes in v2:
- Add file::Offset type alias.
- uaccess:
- Saturate at buffer length on offset overflow.
- Use file::Offset instead of usize.
- debugfs:
- Use file::Offset instead of usize.
- Handle potential overflow when updating ppos.
- Use &T::FILE_OPS directly if possible.
- Fix safety comment in BinaryReaderMut::read_from_slice_mut().
Danilo Krummrich (10):
rust: fs: add new type file::Offset
rust: uaccess: add UserSliceReader::read_slice_partial()
rust: uaccess: add UserSliceReader::read_slice_file()
rust: uaccess: add UserSliceWriter::write_slice_partial()
rust: uaccess: add UserSliceWriter::write_slice_file()
rust: debugfs: support for binary large objects
rust: debugfs: support blobs from smart pointers
samples: rust: debugfs: add example for blobs
rust: debugfs: support binary large objects for ScopedDir
samples: rust: debugfs_scoped: add example for blobs
rust/kernel/debugfs.rs | 110 ++++++++++++-
rust/kernel/debugfs/file_ops.rs | 146 ++++++++++++++++-
rust/kernel/debugfs/traits.rs | 238 +++++++++++++++++++++++++++-
rust/kernel/fs/file.rs | 142 ++++++++++++++++-
rust/kernel/uaccess.rs | 81 ++++++++++
samples/rust/rust_debugfs.rs | 13 ++
samples/rust/rust_debugfs_scoped.rs | 14 +-
7 files changed, 732 insertions(+), 12 deletions(-)
base-commit: e6901808a3b28d8bdabfa98a618b2eab6f8798e8
--
2.51.0
