27a9d66fec
io_uring/io_uring.h already includes io_uring_types.h, no need to include it every time. Kill it in a bunch of places, it prepares us for following patches. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/94d8c943fbe0ef949981c508ddcee7fc1c18850f.1655384063.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/file.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/io_uring.h>
|
|
|
|
#include <uapi/linux/io_uring.h>
|
|
|
|
#include "io_uring.h"
|
|
#include "msg_ring.h"
|
|
|
|
struct io_msg {
|
|
struct file *file;
|
|
u64 user_data;
|
|
u32 len;
|
|
};
|
|
|
|
int io_msg_ring_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
|
{
|
|
struct io_msg *msg = io_kiocb_to_cmd(req);
|
|
|
|
if (unlikely(sqe->addr || sqe->rw_flags || sqe->splice_fd_in ||
|
|
sqe->buf_index || sqe->personality))
|
|
return -EINVAL;
|
|
|
|
msg->user_data = READ_ONCE(sqe->off);
|
|
msg->len = READ_ONCE(sqe->len);
|
|
return 0;
|
|
}
|
|
|
|
int io_msg_ring(struct io_kiocb *req, unsigned int issue_flags)
|
|
{
|
|
struct io_msg *msg = io_kiocb_to_cmd(req);
|
|
struct io_ring_ctx *target_ctx;
|
|
int ret;
|
|
|
|
ret = -EBADFD;
|
|
if (!io_is_uring_fops(req->file))
|
|
goto done;
|
|
|
|
ret = -EOVERFLOW;
|
|
target_ctx = req->file->private_data;
|
|
if (io_post_aux_cqe(target_ctx, msg->user_data, msg->len, 0))
|
|
ret = 0;
|
|
|
|
done:
|
|
if (ret < 0)
|
|
req_set_fail(req);
|
|
io_req_set_res(req, ret, 0);
|
|
/* put file to avoid an attempt to IOPOLL the req */
|
|
io_put_file(req->file);
|
|
req->file = NULL;
|
|
return IOU_OK;
|
|
}
|