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io_uring/net: Allow to do vectorized send

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At the moment you have to use sendmsg for vectorized send.
While this works it's suboptimal as it also means you need to
allocate a struct msghdr that needs to be kept alive until a
submission happens. We can remove this limitation by just
allowing to use send directly.

Signed-off-by: Norman Maurer <norman_maurer@apple.com>
Link: https://lore.kernel.org/r/20250729065952.26646-1-norman_maurer@apple.com
[axboe: remove -EINVAL return for SENDMSG and SEND_VECTORIZED]
[axboe: allow send_zc to set SEND_VECTORIZED too]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Norman Maurer
2025-07-28 20:59:53 -10:00
committed by Jens Axboe
parent 4b290aae78
commit 6f02527729
2 changed files with 11 additions and 2 deletions
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include/uapi/linux/io_uring.h
+4
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@@ -392,12 +392,16 @@ enum io_uring_op {
* the starting buffer ID in cqe->flags as per
* usual for provided buffer usage. The buffers
* will be contiguous from the starting buffer ID.
*
* IORING_SEND_VECTORIZED If set, SEND[_ZC] will take a pointer to a io_vec
* to allow vectorized send operations.
*/
#define IORING_RECVSEND_POLL_FIRST (1U << 0)
#define IORING_RECV_MULTISHOT (1U << 1)
#define IORING_RECVSEND_FIXED_BUF (1U << 2)
#define IORING_SEND_ZC_REPORT_USAGE (1U << 3)
#define IORING_RECVSEND_BUNDLE (1U << 4)
#define IORING_SEND_VECTORIZED (1U << 5)
/*
* cqe.res for IORING_CQE_F_NOTIF if