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From: Breno Leitao <[email protected]>
To: [email protected], [email protected],
	[email protected], [email protected], [email protected],
	[email protected]
Cc: [email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected]
Subject: [PATCH v4 1/3] io_uring: Create a helper to return the SQE size
Date: Thu,  4 May 2023 05:18:54 -0700	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

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 <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
---
 io_uring/io_uring.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

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
-- 
2.34.1


  reply	other threads:[~2023-05-04 12:19 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-04 12:18 [PATCH v4 0/3] io_uring: Pass the whole sqe to commands Breno Leitao
2023-05-04 12:18 ` Breno Leitao [this message]
2023-05-04 14:39   ` [PATCH v4 1/3] io_uring: Create a helper to return the SQE size Ming Lei
2023-05-04 12:18 ` [PATCH v4 2/3] io_uring: Pass whole sqe to commands Breno Leitao
2023-05-04 13:55   ` Christoph Hellwig
2023-05-04 14:04   ` Pavel Begunkov
2023-05-04 14:29   ` Ming Lei
2023-05-04 12:18 ` [PATCH v4 3/3] io_uring: Remove unnecessary BUILD_BUG_ON Breno Leitao
2023-05-04 14:40   ` Ming Lei
2023-05-04 14:09 ` [PATCH v4 0/3] io_uring: Pass the whole sqe to commands Pavel Begunkov
2023-05-04 17:51 ` Jens Axboe

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