diff mbox series

[v4,1/3] io_uring: Create a helper to return the SQE size

Message ID 20230504121856.904491-2-leitao@debian.org (mailing list archive)
State New
Headers show
Series io_uring: Pass the whole sqe to commands | expand

Commit Message

Breno Leitao May 4, 2023, 12:18 p.m. UTC 
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 <leitao@debian.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 io_uring/io_uring.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

Comments

Ming Lei May 4, 2023, 2:39 p.m. UTC | #1 
On Thu, May 04, 2023 at 05:18:54AM -0700, Breno Leitao wrote:
> 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 <leitao@debian.org>
> Reviewed-by: Christoph Hellwig <hch@lst.de>

Reviewed-by: Ming Lei <ming.lei@redhat.com>


Thanks,
Ming
diff mbox series

Patch

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