On Mon, Aug 24, 2020 at 02:52:24PM -0400, Josef Bacik wrote: > On 8/21/20 3:38 AM, Omar Sandoval wrote: > > From: Omar Sandoval <osandov@xxxxxx> > > > > This is essentially copy_struct_from_user() but for an iov_iter. > > > > Suggested-by: Aleksa Sarai <cyphar@xxxxxxxxxx> > > Signed-off-by: Omar Sandoval <osandov@xxxxxx> > > 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@xxxxxxxxxxxxxx> > > 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!
