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