1// SPDX-License-Identifier: GPL-2.0
2#include <linux/kernel.h>
3#include <linux/errno.h>
4#include <linux/file.h>
5#include <linux/io_uring.h>
6
7#include <uapi/linux/io_uring.h>
8
9#include "../fs/internal.h"
10
11#include "io_uring.h"
12#include "statx.h"
13
14struct io_statx {
15 struct file *file;
16 int dfd;
17 unsigned int mask;
18 unsigned int flags;
19 struct filename *filename;
20 struct statx __user *buffer;
21};
22
23int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
24{
25 struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);
26 const char __user *path;
27
28 if (sqe->buf_index || sqe->splice_fd_in)
29 return -EINVAL;
30 if (req->flags & REQ_F_FIXED_FILE)
31 return -EBADF;
32
33 sx->dfd = READ_ONCE(sqe->fd);
34 sx->mask = READ_ONCE(sqe->len);
35 path = u64_to_user_ptr(READ_ONCE(sqe->addr));
36 sx->buffer = u64_to_user_ptr(READ_ONCE(sqe->addr2));
37 sx->flags = READ_ONCE(sqe->statx_flags);
38
39 sx->filename = getname_uflags(path, sx->flags);
40
41 if (IS_ERR(ptr: sx->filename)) {
42 int ret = PTR_ERR(ptr: sx->filename);
43
44 sx->filename = NULL;
45 return ret;
46 }
47
48 req->flags |= REQ_F_NEED_CLEANUP;
49 req->flags |= REQ_F_FORCE_ASYNC;
50 return 0;
51}
52
53int io_statx(struct io_kiocb *req, unsigned int issue_flags)
54{
55 struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);
56 int ret;
57
58 WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
59
60 ret = do_statx(dfd: sx->dfd, filename: sx->filename, flags: sx->flags, mask: sx->mask, buffer: sx->buffer);
61 io_req_set_res(req, res: ret, cflags: 0);
62 return IOU_COMPLETE;
63}
64
65void io_statx_cleanup(struct io_kiocb *req)
66{
67 struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);
68
69 if (sx->filename)
70 putname(name: sx->filename);
71}
72