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// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/io_uring.h>
#include <uapi/linux/io_uring.h>
#include "io_uring.h"
#include "nop.h"
struct io_nop {
/* NOTE: kiocb has the file as the first member, so don't do it here */
struct file *file;
int result;
};
int io_nop_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
unsigned int flags;
struct io_nop *nop = io_kiocb_to_cmd(req, struct io_nop);
flags = READ_ONCE(sqe->nop_flags);
if (flags & ~IORING_NOP_INJECT_RESULT)
return -EINVAL;
if (flags & IORING_NOP_INJECT_RESULT)
nop->result = READ_ONCE(sqe->len);
else
nop->result = 0;
return 0;
}
int io_nop(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_nop *nop = io_kiocb_to_cmd(req, struct io_nop);
if (nop->result < 0)
req_set_fail(req);
io_req_set_res(req, nop->result, 0);
return IOU_OK;
}
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