Re: [PATCH 5.15] io_uring: auto-removal for direct open/accept

[Jens Axboe <axboe@kernel.dk>]

On 9/14/21 7:37 AM, Pavel Begunkov wrote:
> It might be inconvenient that direct open/accept deviates from the
> update semantics and fails if the slot is taken instead of removing a
> file sitting there. Implement the auto-removal.
> 
> Note that removal might need to allocate and so may fail. However, if an
> empty slot is specified, it's guaraneed to not fail on the fd
> installation side. It's needed for users that can't tolerate spuriously
> closed files, e.g. accepts where the other end doesn't expect it.

I think this makes sense, just curious if this was driven by feedback
from a user, or if it's something that came about thinking about the use
cases? This is certainly more flexible and allows an application to open
a new file in an existing slot, rather than needing to explicitly close
it first.

-- 
Jens Axboe