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17 May 2024, 11:00:25 UTC
Revision 4e88d6e7793f2f445f43bd608828541d7f43b608 authored by Jens Axboe on 08 December 2019, 03:59:47 UTC, committed by Jens Axboe on 10 December 2019, 23:33:06 UTC 
io_uring: allow unbreakable links
 
Some commands will invariably end in a failure in the sense that the
completion result will be less than zero. One such example is timeouts
that don't have a completion count set, they will always complete with
-ETIME unless cancelled.

For linked commands, we sever links and fail the rest of the chain if
the result is less than zero. Since we have commands where we know that
will happen, add IOSQE_IO_HARDLINK as a stronger link that doesn't sever
regardless of the completion result. Note that the link will still sever
if we fail submitting the parent request, hard links are only resilient
in the presence of completion results for requests that did submit
correctly.

Cc: stable@vger.kernel.org # v5.4
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Reported-by: 李通洲 <carter.li@eoitek.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 parent 0b4295b
History
Tip revision: 4e88d6e7793f2f445f43bd608828541d7f43b608 authored by Jens Axboe on 08 December 2019, 03:59:47 UTC
io_uring: allow unbreakable links
Tip revision: 4e88d6e
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