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From: Stefan Roesch <shr@fb.com>
To: <io-uring@vger.kernel.org>, <linux-nvme@lists.infradead.org>,
<kernel-team@fb.com>
CC: <shr@fb.com>, <joshi.k@samsung.com>, Jens Axboe <axboe@kernel.dk>
Subject: [PATCH v3 01/12] io_uring: support CQE32 in io_uring_cqe
Date: Mon, 25 Apr 2022 11:25:19 -0700
Message-ID: <20220425182530.2442911-2-shr@fb.com>
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This adds the struct io_uring_cqe_extra in the structure io_uring_cqe to
support large CQE's.
Co-developed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Stefan Roesch <shr@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
include/uapi/linux/io_uring.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.=
h
index ee677dbd6a6d..7020a434e3b1 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -111,6 +111,7 @@ enum {
#define IORING_SETUP_R_DISABLED (1U << 6) /* start with ring disabled */
#define IORING_SETUP_SUBMIT_ALL (1U << 7) /* continue submit on error */
#define IORING_SETUP_SQE128 (1U << 8) /* SQEs are 128b */
+#define IORING_SETUP_CQE32 (1U << 9) /* CQEs are 32b */
=20
enum {
IORING_OP_NOP,
@@ -208,6 +209,12 @@ struct io_uring_cqe {
__u64 user_data; /* sqe->data submission passed back */
__s32 res; /* result code for this event */
__u32 flags;
+
+ /*
+ * If the ring is initialized with IORING_SETUP_CQE32, then this field
+ * contains 16-bytes of padding, doubling the size of the CQE.
+ */
+ __u64 big_cqe[];
};
=20
/*
--=20
2.30.2