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io_uring: return hint on whether more data is available after receive

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For now just use a CQE flag for this, with big CQE support we could
return the actual number of bytes left.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2022-04-26 17:39:50 -06:00
parent a4c7685360
commit f548a12efd
2 changed files with 18 additions and 5 deletions
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2
include/uapi/linux/io_uring.h
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@ -220,9 +220,11 @@ struct io_uring_cqe {
*
* IORING_CQE_F_BUFFER If set, the upper 16 bits are the buffer ID
* IORING_CQE_F_MORE If set, parent SQE will generate more CQE entries
* IORING_CQE_F_SOCK_NONEMPTY If set, more data to read after socket recv
*/
#define IORING_CQE_F_BUFFER (1U << 0)
#define IORING_CQE_F_MORE (1U << 1)
#define IORING_CQE_F_SOCK_NONEMPTY (1U << 2)
enum {
IORING_CQE_BUFFER_SHIFT = 16,