From 96c7d4f81db0fea05c0792f7563ae0cb4ad5f022 Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Thu, 4 May 2023 05:18:54 -0700 Subject: io_uring: Create a helper to return the SQE size Create a simple helper that returns the size of the SQE. The SQE could have two size, depending of the flags. If IO_URING_SETUP_SQE128 flag is set, then return a double SQE, otherwise returns the sizeof of io_uring_sqe (64 bytes). Signed-off-by: Breno Leitao Reviewed-by: Christoph Hellwig Reviewed-by: Pavel Begunkov Link: https://lore.kernel.org/r/20230504121856.904491-2-leitao@debian.org Signed-off-by: Jens Axboe --- io_uring/io_uring.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'io_uring') diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h index 25515d69d205..259bf798a390 100644 --- a/io_uring/io_uring.h +++ b/io_uring/io_uring.h @@ -394,4 +394,14 @@ static inline void io_req_queue_tw_complete(struct io_kiocb *req, s32 res) io_req_task_work_add(req); } +/* + * IORING_SETUP_SQE128 contexts allocate twice the normal SQE size for each + * slot. + */ +static inline size_t uring_sqe_size(struct io_ring_ctx *ctx) +{ + if (ctx->flags & IORING_SETUP_SQE128) + return 2 * sizeof(struct io_uring_sqe); + return sizeof(struct io_uring_sqe); +} #endif -- cgit v1.2.3