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0d584727 JA |
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/namei.h> | |
9 | #include <linux/io_uring.h> | |
10 | #include <linux/fsnotify.h> | |
11 | ||
12 | #include <uapi/linux/io_uring.h> | |
13 | ||
0d584727 JA |
14 | #include "io_uring.h" |
15 | #include "sync.h" | |
16 | ||
17 | struct io_sync { | |
18 | struct file *file; | |
19 | loff_t len; | |
20 | loff_t off; | |
21 | int flags; | |
22 | int mode; | |
23 | }; | |
24 | ||
25 | int io_sfr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
26 | { | |
f2ccb5ae | 27 | struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync); |
0d584727 JA |
28 | |
29 | if (unlikely(sqe->addr || sqe->buf_index || sqe->splice_fd_in)) | |
30 | return -EINVAL; | |
31 | ||
32 | sync->off = READ_ONCE(sqe->off); | |
33 | sync->len = READ_ONCE(sqe->len); | |
34 | sync->flags = READ_ONCE(sqe->sync_range_flags); | |
35 | return 0; | |
36 | } | |
37 | ||
38 | int io_sync_file_range(struct io_kiocb *req, unsigned int issue_flags) | |
39 | { | |
f2ccb5ae | 40 | struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync); |
0d584727 JA |
41 | int ret; |
42 | ||
43 | /* sync_file_range always requires a blocking context */ | |
44 | if (issue_flags & IO_URING_F_NONBLOCK) | |
45 | return -EAGAIN; | |
46 | ||
47 | ret = sync_file_range(req->file, sync->off, sync->len, sync->flags); | |
48 | io_req_set_res(req, ret, 0); | |
49 | return IOU_OK; | |
50 | } | |
51 | ||
52 | int io_fsync_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
53 | { | |
f2ccb5ae | 54 | struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync); |
0d584727 JA |
55 | |
56 | if (unlikely(sqe->addr || sqe->buf_index || sqe->splice_fd_in)) | |
57 | return -EINVAL; | |
58 | ||
59 | sync->flags = READ_ONCE(sqe->fsync_flags); | |
60 | if (unlikely(sync->flags & ~IORING_FSYNC_DATASYNC)) | |
61 | return -EINVAL; | |
62 | ||
63 | sync->off = READ_ONCE(sqe->off); | |
64 | sync->len = READ_ONCE(sqe->len); | |
65 | return 0; | |
66 | } | |
67 | ||
68 | int io_fsync(struct io_kiocb *req, unsigned int issue_flags) | |
69 | { | |
f2ccb5ae | 70 | struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync); |
0d584727 JA |
71 | loff_t end = sync->off + sync->len; |
72 | int ret; | |
73 | ||
74 | /* fsync always requires a blocking context */ | |
75 | if (issue_flags & IO_URING_F_NONBLOCK) | |
76 | return -EAGAIN; | |
77 | ||
78 | ret = vfs_fsync_range(req->file, sync->off, end > 0 ? end : LLONG_MAX, | |
79 | sync->flags & IORING_FSYNC_DATASYNC); | |
80 | io_req_set_res(req, ret, 0); | |
81 | return IOU_OK; | |
82 | } | |
83 | ||
84 | int io_fallocate_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
85 | { | |
f2ccb5ae | 86 | struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync); |
0d584727 JA |
87 | |
88 | if (sqe->buf_index || sqe->rw_flags || sqe->splice_fd_in) | |
89 | return -EINVAL; | |
90 | ||
91 | sync->off = READ_ONCE(sqe->off); | |
92 | sync->len = READ_ONCE(sqe->addr); | |
93 | sync->mode = READ_ONCE(sqe->len); | |
94 | return 0; | |
95 | } | |
96 | ||
97 | int io_fallocate(struct io_kiocb *req, unsigned int issue_flags) | |
98 | { | |
f2ccb5ae | 99 | struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync); |
0d584727 JA |
100 | int ret; |
101 | ||
102 | /* fallocate always requiring blocking context */ | |
103 | if (issue_flags & IO_URING_F_NONBLOCK) | |
104 | return -EAGAIN; | |
105 | ret = vfs_fallocate(req->file, sync->mode, sync->off, sync->len); | |
106 | if (ret >= 0) | |
107 | fsnotify_modify(req->file); | |
108 | io_req_set_res(req, ret, 0); | |
109 | return IOU_OK; | |
110 | } |