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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); | |
aebb224f DY |
35 | req->flags |= REQ_F_FORCE_ASYNC; |
36 | ||
0d584727 JA |
37 | return 0; |
38 | } | |
39 | ||
40 | int io_sync_file_range(struct io_kiocb *req, unsigned int issue_flags) | |
41 | { | |
f2ccb5ae | 42 | struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync); |
0d584727 JA |
43 | int ret; |
44 | ||
45 | /* sync_file_range always requires a blocking context */ | |
aebb224f | 46 | WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); |
0d584727 JA |
47 | |
48 | ret = sync_file_range(req->file, sync->off, sync->len, sync->flags); | |
49 | io_req_set_res(req, ret, 0); | |
50 | return IOU_OK; | |
51 | } | |
52 | ||
53 | int io_fsync_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
54 | { | |
f2ccb5ae | 55 | struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync); |
0d584727 JA |
56 | |
57 | if (unlikely(sqe->addr || sqe->buf_index || sqe->splice_fd_in)) | |
58 | return -EINVAL; | |
59 | ||
60 | sync->flags = READ_ONCE(sqe->fsync_flags); | |
61 | if (unlikely(sync->flags & ~IORING_FSYNC_DATASYNC)) | |
62 | return -EINVAL; | |
63 | ||
64 | sync->off = READ_ONCE(sqe->off); | |
65 | sync->len = READ_ONCE(sqe->len); | |
aebb224f | 66 | req->flags |= REQ_F_FORCE_ASYNC; |
0d584727 JA |
67 | return 0; |
68 | } | |
69 | ||
70 | int io_fsync(struct io_kiocb *req, unsigned int issue_flags) | |
71 | { | |
f2ccb5ae | 72 | struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync); |
0d584727 JA |
73 | loff_t end = sync->off + sync->len; |
74 | int ret; | |
75 | ||
76 | /* fsync always requires a blocking context */ | |
aebb224f | 77 | WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); |
0d584727 JA |
78 | |
79 | ret = vfs_fsync_range(req->file, sync->off, end > 0 ? end : LLONG_MAX, | |
80 | sync->flags & IORING_FSYNC_DATASYNC); | |
81 | io_req_set_res(req, ret, 0); | |
82 | return IOU_OK; | |
83 | } | |
84 | ||
85 | int io_fallocate_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
86 | { | |
f2ccb5ae | 87 | struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync); |
0d584727 JA |
88 | |
89 | if (sqe->buf_index || sqe->rw_flags || sqe->splice_fd_in) | |
90 | return -EINVAL; | |
91 | ||
92 | sync->off = READ_ONCE(sqe->off); | |
93 | sync->len = READ_ONCE(sqe->addr); | |
94 | sync->mode = READ_ONCE(sqe->len); | |
aebb224f | 95 | req->flags |= REQ_F_FORCE_ASYNC; |
0d584727 JA |
96 | return 0; |
97 | } | |
98 | ||
99 | int io_fallocate(struct io_kiocb *req, unsigned int issue_flags) | |
100 | { | |
f2ccb5ae | 101 | struct io_sync *sync = io_kiocb_to_cmd(req, struct io_sync); |
0d584727 JA |
102 | int ret; |
103 | ||
104 | /* fallocate always requiring blocking context */ | |
aebb224f DY |
105 | WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); |
106 | ||
0d584727 JA |
107 | ret = vfs_fallocate(req->file, sync->mode, sync->off, sync->len); |
108 | if (ret >= 0) | |
109 | fsnotify_modify(req->file); | |
110 | io_req_set_res(req, ret, 0); | |
111 | return IOU_OK; | |
112 | } |