1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/syscalls.h>
#include <linux/io_uring.h>
#include <uapi/linux/io_uring.h>
#include "../fs/internal.h"
#include "io_uring.h"
#include "truncate.h"
struct io_ftrunc {
struct file *file;
loff_t len;
};
int io_ftruncate_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_ftrunc *ft = io_kiocb_to_cmd(req, struct io_ftrunc);
if (sqe->rw_flags || sqe->addr || sqe->len || sqe->buf_index ||
sqe->splice_fd_in || sqe->addr3)
return -EINVAL;
ft->len = READ_ONCE(sqe->off);
req->flags |= REQ_F_FORCE_ASYNC;
return 0;
}
int io_ftruncate(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_ftrunc *ft = io_kiocb_to_cmd(req, struct io_ftrunc);
int ret;
WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
ret = do_ftruncate(req->file, ft->len, 1);
io_req_set_res(req, ret, 0);
return IOU_COMPLETE;
}
|
