tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/kernel.h>
3#include <linux/errno.h>
4#include <linux/fs.h>
5#include <linux/file.h>
6#include <linux/io_uring.h>
7
8#include <uapi/linux/io_uring.h>
9
10#include "io_uring.h"
11#include "nop.h"
12
13struct io_nop {
14 /* NOTE: kiocb has the file as the first member, so don't do it here */
15 struct file *file;
16 int result;
17};
18
19int io_nop_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
20{
21 unsigned int flags;
22 struct io_nop *nop = io_kiocb_to_cmd(req, struct io_nop);
23
24 flags = READ_ONCE(sqe->nop_flags);
25 if (flags & ~IORING_NOP_INJECT_RESULT)
26 return -EINVAL;
27
28 if (flags & IORING_NOP_INJECT_RESULT)
29 nop->result = READ_ONCE(sqe->len);
30 else
31 nop->result = 0;
32 return 0;
33}
34
35int io_nop(struct io_kiocb *req, unsigned int issue_flags)
36{
37 struct io_nop *nop = io_kiocb_to_cmd(req, struct io_nop);
38
39 if (nop->result < 0)
40 req_set_fail(req);
41 io_req_set_res(req, nop->result, 0);
42 return IOU_OK;
43}