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1da177e4 LT |
1 | #ifndef _LINUX_SECCOMP_H |
2 | #define _LINUX_SECCOMP_H | |
3 | ||
607ca46e | 4 | #include <uapi/linux/seccomp.h> |
e2cfabdf | 5 | |
c2e1f2e3 KC |
6 | #define SECCOMP_FILTER_FLAG_MASK (SECCOMP_FILTER_FLAG_TSYNC) |
7 | ||
1da177e4 LT |
8 | #ifdef CONFIG_SECCOMP |
9 | ||
1da177e4 LT |
10 | #include <linux/thread_info.h> |
11 | #include <asm/seccomp.h> | |
12 | ||
e2cfabdf WD |
13 | struct seccomp_filter; |
14 | /** | |
15 | * struct seccomp - the state of a seccomp'ed process | |
16 | * | |
17 | * @mode: indicates one of the valid values above for controlled | |
18 | * system calls available to a process. | |
dbd95212 KC |
19 | * @filter: must always point to a valid seccomp-filter or NULL as it is |
20 | * accessed without locking during system call entry. | |
e2cfabdf WD |
21 | * |
22 | * @filter must only be accessed from the context of current as there | |
dbd95212 | 23 | * is no read locking. |
e2cfabdf | 24 | */ |
932ecebb WD |
25 | struct seccomp { |
26 | int mode; | |
e2cfabdf | 27 | struct seccomp_filter *filter; |
932ecebb | 28 | }; |
1da177e4 | 29 | |
acf3b2c7 WD |
30 | extern int __secure_computing(int); |
31 | static inline int secure_computing(int this_syscall) | |
1da177e4 LT |
32 | { |
33 | if (unlikely(test_thread_flag(TIF_SECCOMP))) | |
acf3b2c7 WD |
34 | return __secure_computing(this_syscall); |
35 | return 0; | |
1da177e4 LT |
36 | } |
37 | ||
e4da89d0 WD |
38 | /* A wrapper for architectures supporting only SECCOMP_MODE_STRICT. */ |
39 | static inline void secure_computing_strict(int this_syscall) | |
40 | { | |
41 | BUG_ON(secure_computing(this_syscall) != 0); | |
42 | } | |
43 | ||
1d9d02fe | 44 | extern long prctl_get_seccomp(void); |
e2cfabdf | 45 | extern long prctl_set_seccomp(unsigned long, char __user *); |
1d9d02fe | 46 | |
932ecebb | 47 | static inline int seccomp_mode(struct seccomp *s) |
5cec93c2 AL |
48 | { |
49 | return s->mode; | |
50 | } | |
51 | ||
1da177e4 LT |
52 | #else /* CONFIG_SECCOMP */ |
53 | ||
42a17ad2 RB |
54 | #include <linux/errno.h> |
55 | ||
932ecebb | 56 | struct seccomp { }; |
e2cfabdf | 57 | struct seccomp_filter { }; |
1da177e4 | 58 | |
b1fa650c | 59 | static inline int secure_computing(int this_syscall) { return 0; } |
e4da89d0 | 60 | static inline void secure_computing_strict(int this_syscall) { return; } |
1da177e4 | 61 | |
1d9d02fe AA |
62 | static inline long prctl_get_seccomp(void) |
63 | { | |
64 | return -EINVAL; | |
65 | } | |
66 | ||
e2cfabdf | 67 | static inline long prctl_set_seccomp(unsigned long arg2, char __user *arg3) |
1d9d02fe AA |
68 | { |
69 | return -EINVAL; | |
70 | } | |
71 | ||
932ecebb | 72 | static inline int seccomp_mode(struct seccomp *s) |
5cec93c2 AL |
73 | { |
74 | return 0; | |
75 | } | |
1da177e4 LT |
76 | #endif /* CONFIG_SECCOMP */ |
77 | ||
e2cfabdf WD |
78 | #ifdef CONFIG_SECCOMP_FILTER |
79 | extern void put_seccomp_filter(struct task_struct *tsk); | |
80 | extern void get_seccomp_filter(struct task_struct *tsk); | |
e2cfabdf WD |
81 | #else /* CONFIG_SECCOMP_FILTER */ |
82 | static inline void put_seccomp_filter(struct task_struct *tsk) | |
83 | { | |
84 | return; | |
85 | } | |
86 | static inline void get_seccomp_filter(struct task_struct *tsk) | |
87 | { | |
88 | return; | |
89 | } | |
90 | #endif /* CONFIG_SECCOMP_FILTER */ | |
1da177e4 | 91 | #endif /* _LINUX_SECCOMP_H */ |