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6dbb17961f
Currently f2fs's ->readpage() and ->readpages() assume that either the data undergoes no postprocessing, or decryption only. But with fs-verity, there will be an additional authenticity verification step, and it may be needed either by itself, or combined with decryption. To support this, store a 'struct bio_post_read_ctx' in ->bi_private which contains a work struct, a bitmask of postprocessing steps that are enabled, and an indicator of the current step. The bio completion routine, if there was no I/O error, enqueues the first postprocessing step. When that completes, it continues to the next step. Pages that fail any postprocessing step have PageError set. Once all steps have completed, pages without PageError set are set Uptodate, and all pages are unlocked. Also replace f2fs_encrypted_file() with a new function f2fs_post_read_required() in places like direct I/O and garbage collection that really should be testing whether the file needs special I/O processing, not whether it is encrypted specifically. This may also be useful for other future f2fs features such as compression. Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> |
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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 Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
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.