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ce2e082924
This adds abstractions for the iov_iter type in the case where data_source is ITER_DEST. This will make Rust implementations of fops->read_iter possible. This series only has support for using existing IO vectors created by C code. Additional abstractions will be needed to support the creation of IO vectors in Rust code. These abstractions make the assumption that `struct iov_iter` does not have internal self-references, which implies that it is valid to move it between different local variables. This patch adds an IovIterDest struct that is very similar to the IovIterSource from the previous patch. However, as the methods on the two structs have very little overlap (just getting the length and advance/revert), I do not think it is worth it to try and deduplicate this logic. Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org> Reviewed-by: Danilo Krummrich <dakr@kernel.org> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20250822-iov-iter-v5-2-6ce4819c2977@google.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.