Re: [PATCH 1/2] ext4: Handle casefolding with encryption

On Wed, Feb 03, 2021 at 03:55:06AM -0700, Andreas Dilger wrote:

It looks like this change will break the dirdata feature, which is similarly
storing a data field beyond the end of the dirent. However, that feature also
provides for flags stored in the high bits of the type field to indicate
which of the fields are in use there.
The first byte of each field stores
the length, so it can be skipped even if the content is not understood.

Daniel, for context, the dirdata field is an out-of-tree feature which
is used by Lustre, and so has fairly large deployed base.  So if there
is a way that we can accomodate not breaking dirdata, that would be
good.

Did the ext4 casefold+encryption implementation escape out to any
Android handsets?

Thanks,

					- Ted