On Mon, Aug 24, 2020 at 02:52:24PM -0400, Josef Bacik wrote:

On 8/21/20 3:38 AM, Omar Sandoval wrote:

quoted

From: Omar Sandoval <redacted>

This is essentially copy_struct_from_user() but for an iov_iter.

Suggested-by: Aleksa Sarai <redacted>
Signed-off-by: Omar Sandoval <redacted>

This took me a lot longer to grok than I'm proud of, but the idea is you'll
have a single segment that represents the incoming encoded data, and then
subsequent segments will be the read/write buffer, correct?  The code looks
fine to me,

Reviewed-by: Josef Bacik <josef@toxicpanda.com>

Thanks,

Josef

Yes, that's the idea for RWF_ENCODED. This patch is the generic way to
shove an extra metadata struct at the beginning of an iov_iter in a way
that is backwards/forwards compatible.

Thanks!