On Thu, Jun 06, 2019 at 08:52:03AM -0700, Eric Biggers wrote:
> +/*
> + * Format of ext4 verity xattr. This points to the location of the verity
> + * descriptor within the file data rather than containing it directly because
> + * the verity descriptor *must* be encrypted when ext4 encryption is used.
> But,
> + * ext4 encryption does not encrypt xattrs.
> + */
> +struct fsverity_descriptor_location {
> + __le32 version;
> + __le32 size;
> + __le64 pos;
> +};
What's the benefit of storing the location in an xattr as opposed to
just keying it off the end of i_size, rounded up to next page size (or
64k) as I had suggested earlier?
Using an xattr burns xattr space, which is a limited resource, and it
adds some additional code complexity. Does the benefits outweigh the
added complexity?
- Ted
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