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io_uring: optimise sqe-to-req flags translation

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For each IOSQE_* flag there is a corresponding REQ_F_* flag. And there
is a repetitive pattern of their translation:
e.g. if (sqe->flags & SQE_FLAG*) req->flags |= REQ_F_FLAG*

Use same numeric values/bits for them and copy instead of manual
handling.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov
2020-01-18 20:22:41 +03:00
committed by Jens Axboe
parent 87987898a1
commit 6b47ee6eca
2 changed files with 81 additions and 34 deletions
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23
include/uapi/linux/io_uring.h
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@@ -45,14 +45,27 @@ struct io_uring_sqe {
};
};
enum {
IOSQE_FIXED_FILE_BIT,
IOSQE_IO_DRAIN_BIT,
IOSQE_IO_LINK_BIT,
IOSQE_IO_HARDLINK_BIT,
IOSQE_ASYNC_BIT,
};
/*
* sqe->flags
*/
#define IOSQE_FIXED_FILE (1U << 0) /* use fixed fileset */
#define IOSQE_IO_DRAIN (1U << 1) /* issue after inflight IO */
#define IOSQE_IO_LINK (1U << 2) /* links next sqe */
#define IOSQE_IO_HARDLINK (1U << 3) /* like LINK, but stronger */
#define IOSQE_ASYNC (1U << 4) /* always go async */
/* use fixed fileset */
#define IOSQE_FIXED_FILE (1U << IOSQE_FIXED_FILE_BIT)
/* issue after inflight IO */
#define IOSQE_IO_DRAIN (1U << IOSQE_IO_DRAIN_BIT)
/* links next sqe */
#define IOSQE_IO_LINK (1U << IOSQE_IO_LINK_BIT)
/* like LINK, but stronger */
#define IOSQE_IO_HARDLINK (1U << IOSQE_IO_HARDLINK_BIT)
/* always go async */
#define IOSQE_ASYNC (1U << IOSQE_ASYNC_BIT)
/*
* io_uring_setup() flags