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85af90e57c
FSCRYPT_POLICY_FLAG_DIRECT_KEY is currently only allowed with Adiantum encryption. But FS_IOC_SET_ENCRYPTION_POLICY allowed it in combination with other encryption modes, and an error wasn't reported until later when the encrypted directory was actually used. Fix it to report the error earlier by validating the correct use of the DIRECT_KEY flag in fscrypt_supported_policy(), similar to how we validate the IV_INO_LBLK_64 flag. Link: https://lore.kernel.org/r/20191209211829.239800-3-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@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 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.