Commit | Line | Data |
---|---|---|
f4c163dd 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 | ||
11 | #include <uapi/linux/fadvise.h> | |
12 | #include <uapi/linux/io_uring.h> | |
13 | ||
f4c163dd JA |
14 | #include "io_uring.h" |
15 | #include "advise.h" | |
16 | ||
17 | struct io_fadvise { | |
18 | struct file *file; | |
19 | u64 offset; | |
20 | u32 len; | |
21 | u32 advice; | |
22 | }; | |
23 | ||
24 | struct io_madvise { | |
25 | struct file *file; | |
26 | u64 addr; | |
27 | u32 len; | |
28 | u32 advice; | |
29 | }; | |
30 | ||
31 | int io_madvise_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
32 | { | |
33 | #if defined(CONFIG_ADVISE_SYSCALLS) && defined(CONFIG_MMU) | |
f2ccb5ae | 34 | struct io_madvise *ma = io_kiocb_to_cmd(req, struct io_madvise); |
f4c163dd JA |
35 | |
36 | if (sqe->buf_index || sqe->off || sqe->splice_fd_in) | |
37 | return -EINVAL; | |
38 | ||
39 | ma->addr = READ_ONCE(sqe->addr); | |
40 | ma->len = READ_ONCE(sqe->len); | |
41 | ma->advice = READ_ONCE(sqe->fadvise_advice); | |
42 | return 0; | |
43 | #else | |
44 | return -EOPNOTSUPP; | |
45 | #endif | |
46 | } | |
47 | ||
48 | int io_madvise(struct io_kiocb *req, unsigned int issue_flags) | |
49 | { | |
50 | #if defined(CONFIG_ADVISE_SYSCALLS) && defined(CONFIG_MMU) | |
f2ccb5ae | 51 | struct io_madvise *ma = io_kiocb_to_cmd(req, struct io_madvise); |
f4c163dd JA |
52 | int ret; |
53 | ||
54 | if (issue_flags & IO_URING_F_NONBLOCK) | |
55 | return -EAGAIN; | |
56 | ||
57 | ret = do_madvise(current->mm, ma->addr, ma->len, ma->advice); | |
58 | io_req_set_res(req, ret, 0); | |
59 | return IOU_OK; | |
60 | #else | |
61 | return -EOPNOTSUPP; | |
62 | #endif | |
63 | } | |
64 | ||
65 | int io_fadvise_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
66 | { | |
f2ccb5ae | 67 | struct io_fadvise *fa = io_kiocb_to_cmd(req, struct io_fadvise); |
f4c163dd JA |
68 | |
69 | if (sqe->buf_index || sqe->addr || sqe->splice_fd_in) | |
70 | return -EINVAL; | |
71 | ||
72 | fa->offset = READ_ONCE(sqe->off); | |
73 | fa->len = READ_ONCE(sqe->len); | |
74 | fa->advice = READ_ONCE(sqe->fadvise_advice); | |
75 | return 0; | |
76 | } | |
77 | ||
78 | int io_fadvise(struct io_kiocb *req, unsigned int issue_flags) | |
79 | { | |
f2ccb5ae | 80 | struct io_fadvise *fa = io_kiocb_to_cmd(req, struct io_fadvise); |
f4c163dd JA |
81 | int ret; |
82 | ||
83 | if (issue_flags & IO_URING_F_NONBLOCK) { | |
84 | switch (fa->advice) { | |
85 | case POSIX_FADV_NORMAL: | |
86 | case POSIX_FADV_RANDOM: | |
87 | case POSIX_FADV_SEQUENTIAL: | |
88 | break; | |
89 | default: | |
90 | return -EAGAIN; | |
91 | } | |
92 | } | |
93 | ||
94 | ret = vfs_fadvise(req->file, fa->offset, fa->len, fa->advice); | |
95 | if (ret < 0) | |
96 | req_set_fail(req); | |
97 | io_req_set_res(req, ret, 0); | |
98 | return IOU_OK; | |
99 | } |