io_uring: add support for IORING_OP_SYNC_FILE_RANGE (5d17b4a4) · Commits · 戴 / test

fs/io_uring.c

+51 −0

Original line number	Diff line number	Diff line
		@@ -1267,6 +1267,54 @@ static int io_fsync(struct io_kiocb req, const struct io_uring_sqe sqe,
		return 0;
		}

		static int io_prep_sfr(struct io_kiocb req, const struct io_uring_sqe sqe)
		{
		struct io_ring_ctx *ctx = req->ctx;
		int ret = 0;

		if (!req->file)
		return -EBADF;
		/* Prep already done (EAGAIN retry) */
		if (req->flags & REQ_F_PREPPED)
		return 0;

		if (unlikely(ctx->flags & IORING_SETUP_IOPOLL))
		return -EINVAL;
		if (unlikely(sqe->addr \|\| sqe->ioprio \|\| sqe->buf_index))
		return -EINVAL;

		req->flags \|= REQ_F_PREPPED;
		return ret;
		}

		static int io_sync_file_range(struct io_kiocb *req,
		const struct io_uring_sqe *sqe,
		bool force_nonblock)
		{
		loff_t sqe_off;
		loff_t sqe_len;
		unsigned flags;
		int ret;

		ret = io_prep_sfr(req, sqe);
		if (ret)
		return ret;

		/* sync_file_range always requires a blocking context */
		if (force_nonblock)
		return -EAGAIN;

		sqe_off = READ_ONCE(sqe->off);
		sqe_len = READ_ONCE(sqe->len);
		flags = READ_ONCE(sqe->sync_range_flags);

		ret = sync_file_range(req->rw.ki_filp, sqe_off, sqe_len, flags);

		io_cqring_add_event(req->ctx, sqe->user_data, ret, 0);
		io_put_req(req);
		return 0;
		}

		static void io_poll_remove_one(struct io_kiocb *req)
		{
		struct io_poll_iocb *poll = &req->poll;
		@@ -1549,6 +1597,9 @@ static int __io_submit_sqe(struct io_ring_ctx ctx, struct io_kiocb req,
		case IORING_OP_POLL_REMOVE:
		ret = io_poll_remove(req, s->sqe);
		break;
		case IORING_OP_SYNC_FILE_RANGE:
		ret = io_sync_file_range(req, s->sqe, force_nonblock);
		break;
		default:
		ret = -EINVAL;
		break;

+2 −0

Original line number	Diff line number	Diff line
		@@ -26,6 +26,7 @@ struct io_uring_sqe {
		__kernel_rwf_t rw_flags;
		__u32 fsync_flags;
		__u16 poll_events;
		__u32 sync_range_flags;
		};
		__u64 user_data; /* data to be passed back at completion time */
		union {
		@@ -55,6 +56,7 @@ struct io_uring_sqe {
		#define IORING_OP_WRITE_FIXED 5
		#define IORING_OP_POLL_ADD 6
		#define IORING_OP_POLL_REMOVE 7
		#define IORING_OP_SYNC_FILE_RANGE 8

		/*
		* sqe->fsync_flags