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When the key for an inode is not found but the inode is using the test_dummy_encryption policy, automatically add the test_dummy_encryption key to the filesystem keyring. This eliminates the need for all the individual filesystems to do this at mount time, which is a bit tricky to clean up from on failure. Note: this covers the call to fscrypt_find_master_key() from inode key setup, but not from the fscrypt ioctls. So, this isn't *exactly* the same as the key being present from the very beginning. I think we can tolerate that, though, since the inode key setup caller is the only one that actually matters in the context of test_dummy_encryption. Signed-off-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20230208062107.199831-2-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.