On Mon, Jan 23, 2023 at 02:57:18PM +0200, Israel Rukshin wrote: >> - what happens with multipathing? when if not all devices are >> capable. SW fallback? > SW fallback happens every time the device doesn't support the specific > crypto request (which include data-unit-size, mode and dun_bytes). > So with multipathing, one path uses the HW crypto offload and the other one > uses the SW fallback. That's a big no-go. The blk-crypto-fallback code is just a toy example and not actually safe to use in prodution. Most importantly it just kmallocs a bio clone and pages for it without any mempool that guarantees forward progress.
