io_uring: wire send zc request type

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Add a new io_uring opcode IORING_OP_SENDZC. The main distinction from
IORING_OP_SEND is that the user should specify a notification slot
index in sqe::notification_idx and the buffers are safe to reuse only
when the used notification is flushed and completes.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/a80387c6a68ce9cf99b3b6ef6f71068468761fb7.1657643355.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2022-07-12 21:52:43 +01:00 • committed by Jens Axboe

parent bc24d6bd32

commit 06a5464be8

4 changed files with 117 additions and 0 deletions

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include/uapi/linux/io_uring.h

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