On Fri, Jul 23, 2021 at 02:33:02PM -0700, Eric Biggers wrote: > I do still wonder if we should just not support that... Dave is the only person > who has asked for it, and it's a lot of trouble to support. > > I also noticed that f2fs has always only supported direct I/O that is *fully* > fs-block aligned (including the I/O segments) anyway. So presumably that > limitation is not really that important after all... > > Does anyone else have thoughts on this? There are some use cases that really like sector aligned direct I/O, what comes to mind is some data bases, and file system repair tools (the latter on the raw block device). So it is nice to support, but not really required. So for now I'd much prefer to initially support inline encryption for direct I/O without that if that simplifies the support. We can revisit the additional complexity later. Also note that for cheap flash media pretending support for 512 byte blocks is actually a bit awwkward, so just presenting the media as having 4096 sectors in these setups would be the better choice anyway.
