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/mm.h>
7 #include <linux/slab.h>
8 #include <linux/syscalls.h>
9 #include <linux/io_uring.h>
10
11 #include <uapi/linux/io_uring.h>
12
13 #include "../fs/internal.h"
14
15 #include "io_uring.h"
16 #include "truncate.h"
17
18 struct io_ftrunc {
19 struct file *file;
20 loff_t len;
21 };
22
23 int io_ftruncate_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
24 {
25 struct io_ftrunc *ft = io_kiocb_to_cmd(req, struct io_ftrunc);
26
27 if (sqe->rw_flags || sqe->addr || sqe->len || sqe->buf_index ||
28 sqe->splice_fd_in || sqe->addr3)
29 return -EINVAL;
30
31 ft->len = READ_ONCE(sqe->off);
32
33 req->flags |= REQ_F_FORCE_ASYNC;
34 return 0;
35 }
36
37 int io_ftruncate(struct io_kiocb *req, unsigned int issue_flags)
38 {
39 struct io_ftrunc *ft = io_kiocb_to_cmd(req, struct io_ftrunc);
40 int ret;
41
42 WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
43
44 ret = do_ftruncate(req->file, ft->len, 1);
45
46 io_req_set_res(req, ret, 0);
47 return IOU_OK;
48 }
49
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