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From: Breno Leitao <[email protected]>
To: [email protected], [email protected],
	[email protected], [email protected], [email protected]
Cc: [email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected], [email protected]
Subject: [PATCH v3 1/4] io_uring: Create a helper to return the SQE size
Date: Sun, 30 Apr 2023 07:35:29 -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]>
---
 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:[~2023-04-30 14:36 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-30 14:35 [PATCH v3 0/4] io_uring: Pass the whole sqe to commands Breno Leitao
2023-04-30 14:35 ` Breno Leitao [this message]
2023-05-01  4:28   ` [PATCH v3 1/4] io_uring: Create a helper to return the SQE size Christoph Hellwig
2023-04-30 14:35 ` [PATCH v3 2/4] io_uring: Pass whole sqe to commands Breno Leitao
2023-05-01  4:30   ` Christoph Hellwig
2023-04-30 14:35 ` [PATCH v3 3/4] io_uring: Remove unnecessary BUILD_BUG_ON Breno Leitao
2023-04-30 14:35 ` [PATCH v3 4/4] block: ublk_drv: Add a helper instead of casting Breno Leitao
2023-05-01  4:31   ` Christoph Hellwig
2023-05-03 19:11     ` Breno Leitao

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