Linux kernel mirror (for testing)
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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 SECCOMP_FILTER_FLAG_SPEC_ALLOW | \
10 SECCOMP_FILTER_FLAG_NEW_LISTENER | \
11 SECCOMP_FILTER_FLAG_TSYNC_ESRCH)
12
13/* sizeof() the first published struct seccomp_notif_addfd */
14#define SECCOMP_NOTIFY_ADDFD_SIZE_VER0 24
15#define SECCOMP_NOTIFY_ADDFD_SIZE_LATEST SECCOMP_NOTIFY_ADDFD_SIZE_VER0
16
17#ifdef CONFIG_SECCOMP
18
19#include <linux/thread_info.h>
20#include <linux/atomic.h>
21#include <asm/seccomp.h>
22
23struct seccomp_filter;
24/**
25 * struct seccomp - the state of a seccomp'ed process
26 *
27 * @mode: indicates one of the valid values above for controlled
28 * system calls available to a process.
29 * @filter: must always point to a valid seccomp-filter or NULL as it is
30 * accessed without locking during system call entry.
31 *
32 * @filter must only be accessed from the context of current as there
33 * is no read locking.
34 */
35struct seccomp {
36 int mode;
37 atomic_t filter_count;
38 struct seccomp_filter *filter;
39};
40
41#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
42extern int __secure_computing(const struct seccomp_data *sd);
43static inline int secure_computing(void)
44{
45 if (unlikely(test_syscall_work(SECCOMP)))
46 return __secure_computing(NULL);
47 return 0;
48}
49#else
50extern void secure_computing_strict(int this_syscall);
51#endif
52
53extern long prctl_get_seccomp(void);
54extern long prctl_set_seccomp(unsigned long, void __user *);
55
56static inline int seccomp_mode(struct seccomp *s)
57{
58 return s->mode;
59}
60
61#else /* CONFIG_SECCOMP */
62
63#include <linux/errno.h>
64
65struct seccomp { };
66struct seccomp_filter { };
67struct seccomp_data;
68
69#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
70static inline int secure_computing(void) { return 0; }
71static inline int __secure_computing(const struct seccomp_data *sd) { return 0; }
72#else
73static inline void secure_computing_strict(int this_syscall) { return; }
74#endif
75
76static inline long prctl_get_seccomp(void)
77{
78 return -EINVAL;
79}
80
81static inline long prctl_set_seccomp(unsigned long arg2, char __user *arg3)
82{
83 return -EINVAL;
84}
85
86static inline int seccomp_mode(struct seccomp *s)
87{
88 return SECCOMP_MODE_DISABLED;
89}
90#endif /* CONFIG_SECCOMP */
91
92#ifdef CONFIG_SECCOMP_FILTER
93extern void seccomp_filter_release(struct task_struct *tsk);
94extern void get_seccomp_filter(struct task_struct *tsk);
95#else /* CONFIG_SECCOMP_FILTER */
96static inline void seccomp_filter_release(struct task_struct *tsk)
97{
98 return;
99}
100static inline void get_seccomp_filter(struct task_struct *tsk)
101{
102 return;
103}
104#endif /* CONFIG_SECCOMP_FILTER */
105
106#if defined(CONFIG_SECCOMP_FILTER) && defined(CONFIG_CHECKPOINT_RESTORE)
107extern long seccomp_get_filter(struct task_struct *task,
108 unsigned long filter_off, void __user *data);
109extern long seccomp_get_metadata(struct task_struct *task,
110 unsigned long filter_off, void __user *data);
111#else
112static inline long seccomp_get_filter(struct task_struct *task,
113 unsigned long n, void __user *data)
114{
115 return -EINVAL;
116}
117static inline long seccomp_get_metadata(struct task_struct *task,
118 unsigned long filter_off,
119 void __user *data)
120{
121 return -EINVAL;
122}
123#endif /* CONFIG_SECCOMP_FILTER && CONFIG_CHECKPOINT_RESTORE */
124
125#ifdef CONFIG_SECCOMP_CACHE_DEBUG
126struct seq_file;
127
128int proc_pid_seccomp_cache(struct seq_file *m, struct pid_namespace *ns,
129 struct pid *pid, struct task_struct *task);
130#endif
131#endif /* _LINUX_SECCOMP_H */