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Mon, 24 Feb 2020 08:04:43 -0800 (PST) From: Pavel Begunkov To: Jens Axboe , io-uring@vger.kernel.org Subject: [PATCH v4 1/2] splice: add splice(2) helpers Date: Mon, 24 Feb 2020 19:03:49 +0300 Message-Id: X-Mailer: git-send-email 2.24.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: io-uring-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Add splice helpers and update io_uring.h Signed-off-by: Pavel Begunkov --- src/include/liburing.h | 12 ++++++++++++ src/include/liburing/io_uring.h | 14 +++++++++++++- 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/src/include/liburing.h b/src/include/liburing.h index b8bcdf5..7edd4f1 100644 --- a/src/include/liburing.h +++ b/src/include/liburing.h @@ -191,6 +191,18 @@ static inline void io_uring_prep_rw(int op, struct io_uring_sqe *sqe, int fd, sqe->__pad2[0] = sqe->__pad2[1] = sqe->__pad2[2] = 0; } +static inline void io_uring_prep_splice(struct io_uring_sqe *sqe, + int fd_in, loff_t off_in, + int fd_out, loff_t off_out, + unsigned int nbytes, + unsigned int splice_flags) +{ + io_uring_prep_rw(IORING_OP_SPLICE, sqe, fd_out, (void *)off_in, + nbytes, off_out); + sqe->splice_fd_in = fd_in; + sqe->splice_flags = splice_flags; +} + static inline void io_uring_prep_readv(struct io_uring_sqe *sqe, int fd, const struct iovec *iovecs, unsigned nr_vecs, off_t offset) diff --git a/src/include/liburing/io_uring.h b/src/include/liburing/io_uring.h index 7e7c2d9..a3d5e25 100644 --- a/src/include/liburing/io_uring.h +++ b/src/include/liburing/io_uring.h @@ -23,7 +23,10 @@ struct io_uring_sqe { __u64 off; /* offset into file */ __u64 addr2; }; - __u64 addr; /* pointer to buffer or iovecs */ + union { + __u64 addr; /* pointer to buffer or iovecs */ + __u64 splice_off_in; + }; __u32 len; /* buffer size or number of iovecs */ union { __kernel_rwf_t rw_flags; @@ -37,6 +40,7 @@ struct io_uring_sqe { __u32 open_flags; __u32 statx_flags; __u32 fadvise_advice; + __u32 splice_flags; }; __u64 user_data; /* data to be passed back at completion time */ union { @@ -45,6 +49,7 @@ struct io_uring_sqe { __u16 buf_index; /* personality to use, if used */ __u16 personality; + __s32 splice_fd_in; }; __u64 __pad2[3]; }; @@ -113,6 +118,7 @@ enum { IORING_OP_RECV, IORING_OP_OPENAT2, IORING_OP_EPOLL_CTL, + IORING_OP_SPLICE, /* this goes last, obviously */ IORING_OP_LAST, @@ -128,6 +134,12 @@ enum { */ #define IORING_TIMEOUT_ABS (1U << 0) +/* + * sqe->splice_flags + * extends splice(2) flags + */ +#define SPLICE_F_FD_IN_FIXED (1U << 31) /* the last bit of __u32 */ + /* * IO completion data structure (Completion Queue Entry) */ -- 2.24.0