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