fscrypto: move ioctl processing more fully into common code
Multiple bugs were recently fixed in the "set encryption policy" ioctl. To make it clear that fscrypt_process_policy() and fscrypt_get_policy() implement ioctls and therefore their implementations must take standard security and correctness precautions, rename them to fscrypt_ioctl_set_policy() and fscrypt_ioctl_get_policy(). Make the latter take in a struct file * to make it consistent with the former. Signed-off-by:Eric Biggers <ebiggers@google.com> Signed-off-by:
Theodore Ts'o <tytso@mit.edu>
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