1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _LINUX_SECCOMP_H |
3 | #define _LINUX_SECCOMP_H |
4 | |
5 | #include <uapi/linux/seccomp.h> |
6 | |
7 | #define SECCOMP_FILTER_FLAG_MASK (SECCOMP_FILTER_FLAG_TSYNC | \ |
8 | SECCOMP_FILTER_FLAG_LOG | \ |
9 | SECCOMP_FILTER_FLAG_SPEC_ALLOW | \ |
10 | SECCOMP_FILTER_FLAG_NEW_LISTENER) |
11 | |
12 | #ifdef CONFIG_SECCOMP |
13 | |
14 | #include <linux/thread_info.h> |
15 | #include <asm/seccomp.h> |
16 | |
17 | struct seccomp_filter; |
18 | /** |
19 | * struct seccomp - the state of a seccomp'ed process |
20 | * |
21 | * @mode: indicates one of the valid values above for controlled |
22 | * system calls available to a process. |
23 | * @filter: must always point to a valid seccomp-filter or NULL as it is |
24 | * accessed without locking during system call entry. |
25 | * |
26 | * @filter must only be accessed from the context of current as there |
27 | * is no read locking. |
28 | */ |
29 | struct seccomp { |
30 | int mode; |
31 | struct seccomp_filter *filter; |
32 | }; |
33 | |
34 | #ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER |
35 | extern int __secure_computing(const struct seccomp_data *sd); |
36 | static inline int secure_computing(const struct seccomp_data *sd) |
37 | { |
38 | if (unlikely(test_thread_flag(TIF_SECCOMP))) |
39 | return __secure_computing(sd); |
40 | return 0; |
41 | } |
42 | #else |
43 | extern void secure_computing_strict(int this_syscall); |
44 | #endif |
45 | |
46 | extern long prctl_get_seccomp(void); |
47 | extern long prctl_set_seccomp(unsigned long, void __user *); |
48 | |
49 | static inline int seccomp_mode(struct seccomp *s) |
50 | { |
51 | return s->mode; |
52 | } |
53 | |
54 | #else /* CONFIG_SECCOMP */ |
55 | |
56 | #include <linux/errno.h> |
57 | |
58 | struct seccomp { }; |
59 | struct seccomp_filter { }; |
60 | |
61 | #ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER |
62 | static inline int secure_computing(struct seccomp_data *sd) { return 0; } |
63 | #else |
64 | static inline void secure_computing_strict(int this_syscall) { return; } |
65 | #endif |
66 | |
67 | static inline long prctl_get_seccomp(void) |
68 | { |
69 | return -EINVAL; |
70 | } |
71 | |
72 | static inline long prctl_set_seccomp(unsigned long arg2, char __user *arg3) |
73 | { |
74 | return -EINVAL; |
75 | } |
76 | |
77 | static inline int seccomp_mode(struct seccomp *s) |
78 | { |
79 | return SECCOMP_MODE_DISABLED; |
80 | } |
81 | #endif /* CONFIG_SECCOMP */ |
82 | |
83 | #ifdef CONFIG_SECCOMP_FILTER |
84 | extern void put_seccomp_filter(struct task_struct *tsk); |
85 | extern void get_seccomp_filter(struct task_struct *tsk); |
86 | #else /* CONFIG_SECCOMP_FILTER */ |
87 | static inline void put_seccomp_filter(struct task_struct *tsk) |
88 | { |
89 | return; |
90 | } |
91 | static inline void get_seccomp_filter(struct task_struct *tsk) |
92 | { |
93 | return; |
94 | } |
95 | #endif /* CONFIG_SECCOMP_FILTER */ |
96 | |
97 | #if defined(CONFIG_SECCOMP_FILTER) && defined(CONFIG_CHECKPOINT_RESTORE) |
98 | extern long seccomp_get_filter(struct task_struct *task, |
99 | unsigned long filter_off, void __user *data); |
100 | extern long seccomp_get_metadata(struct task_struct *task, |
101 | unsigned long filter_off, void __user *data); |
102 | #else |
103 | static inline long seccomp_get_filter(struct task_struct *task, |
104 | unsigned long n, void __user *data) |
105 | { |
106 | return -EINVAL; |
107 | } |
108 | static inline long seccomp_get_metadata(struct task_struct *task, |
109 | unsigned long filter_off, |
110 | void __user *data) |
111 | { |
112 | return -EINVAL; |
113 | } |
114 | #endif /* CONFIG_SECCOMP_FILTER && CONFIG_CHECKPOINT_RESTORE */ |
115 | #endif /* _LINUX_SECCOMP_H */ |
116 | |