On Wed, Jun 17, 2020 at 10:53:36PM +0530, Kanchan Joshi wrote:

This patchset enables issuing zone-append using aio and io-uring direct-io interface.

For aio, this introduces opcode IOCB_CMD_ZONE_APPEND. Application uses start LBA
of the zone to issue append. On completion 'res2' field is used to return
zone-relative offset.

Maybe it's obvious to everyone working with zoned drives on a daily
basis, but please explain in the commit message why you need to return
the zone-relative offset to the application.