[RFC PATCH 0/8] block: add support for REQ_OP_VERIFY

[javier at javigon.com]

On 04.11.2021 15:37, Keith Busch wrote:
>On Thu, Nov 04, 2021 at 06:34:31PM +0100, Christoph Hellwig wrote:
>> On Thu, Nov 04, 2021 at 10:32:35AM -0700, Darrick J. Wong wrote:
>> > I also wonder if it would be useful (since we're already having a
>> > discussion elsewhere about data integrity syscalls for pmem) to be able
>> > to call this sort of thing against files?  In which case we'd want
>> > another preadv2 flag or something, and then plumb all that through the
>> > vfs/iomap as needed?
>>
>> IFF we do this (can't answer if there is a need) we should not
>> overload read with it.  It is an operation that does not return
>> data but just a status, so let's not get into that mess.
>
>If there is a need for this, a new io_uring opcode seems like the
>appropirate user facing interface for it.

+1 to this. I was looking at the patchset yesterday and this was one of
the questions I had. Any reasons to not do it this way Chaitanya?