]> Git Repo - linux.git/blob - io_uring/statx.c
io_uring/rw: fix cflags posting for single issue multishot read
[linux.git] / io_uring / statx.c
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
14 struct 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
23 int 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_flags(path,
40                                      getname_statx_lookup_flags(sx->flags));
41
42         if (IS_ERR(sx->filename)) {
43                 int ret = PTR_ERR(sx->filename);
44
45                 sx->filename = NULL;
46                 return ret;
47         }
48
49         req->flags |= REQ_F_NEED_CLEANUP;
50         req->flags |= REQ_F_FORCE_ASYNC;
51         return 0;
52 }
53
54 int io_statx(struct io_kiocb *req, unsigned int issue_flags)
55 {
56         struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);
57         int ret;
58
59         WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
60
61         ret = do_statx(sx->dfd, sx->filename, sx->flags, sx->mask, sx->buffer);
62         io_req_set_res(req, ret, 0);
63         return IOU_OK;
64 }
65
66 void io_statx_cleanup(struct io_kiocb *req)
67 {
68         struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);
69
70         if (sx->filename)
71                 putname(sx->filename);
72 }
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