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FS_CRYPTO_BLOCK_SIZE is neither the filesystem block size nor the granularity of encryption. Rather, it defines two logically separate constraints that both arise from the block size of the AES cipher: - The alignment required for the lengths of file contents blocks - The minimum input/output length for the filenames encryption modes Since there are way too many things called the "block size", and the connection with the AES block size is not easily understood, split FS_CRYPTO_BLOCK_SIZE into two constants FSCRYPT_CONTENTS_ALIGNMENT and FSCRYPT_FNAME_MIN_MSG_LEN that more clearly describe what they are. Signed-off-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20220405010914.18519-1-ebiggers@kernel.org
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.
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.