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 SECCOMP_FILTER_FLAG_WAIT_KILLABLE_RECV)
13
14/* sizeof() the first published struct seccomp_notif_addfd */
15#define SECCOMP_NOTIFY_ADDFD_SIZE_VER0 24
16#define SECCOMP_NOTIFY_ADDFD_SIZE_LATEST SECCOMP_NOTIFY_ADDFD_SIZE_VER0
17
18#ifdef CONFIG_SECCOMP
19
20#include <linux/thread_info.h>
21#include <linux/atomic.h>
22#include <asm/seccomp.h>
23
24struct seccomp_filter;
25/**
26 * struct seccomp - the state of a seccomp'ed process
27 *
28 * @mode: indicates one of the valid values above for controlled
29 * system calls available to a process.
30 * @filter: must always point to a valid seccomp-filter or NULL as it is
31 * accessed without locking during system call entry.
32 *
33 * @filter must only be accessed from the context of current as there
34 * is no read locking.
35 */
36struct seccomp {
37 int mode;
38 atomic_t filter_count;
39 struct seccomp_filter *filter;
40};
41
42#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
43extern int __secure_computing(const struct seccomp_data *sd);
44static inline int secure_computing(void)
45{
46 if (unlikely(test_syscall_work(SECCOMP)))
47 return __secure_computing(NULL);
48 return 0;
49}
50#else
51extern void secure_computing_strict(int this_syscall);
52#endif
53
54extern long prctl_get_seccomp(void);
55extern long prctl_set_seccomp(unsigned long, void __user *);
56
57static inline int seccomp_mode(struct seccomp *s)
58{
59 return s->mode;
60}
61
62#else /* CONFIG_SECCOMP */
63
64#include <linux/errno.h>
65
66struct seccomp { };
67struct seccomp_filter { };
68struct seccomp_data;
69
70#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
71static inline int secure_computing(void) { return 0; }
72static inline int __secure_computing(const struct seccomp_data *sd) { return 0; }
73#else
74static inline void secure_computing_strict(int this_syscall) { return; }
75#endif
76
77static inline long prctl_get_seccomp(void)
78{
79 return -EINVAL;
80}
81
82static inline long prctl_set_seccomp(unsigned long arg2, char __user *arg3)
83{
84 return -EINVAL;
85}
86
87static inline int seccomp_mode(struct seccomp *s)
88{
89 return SECCOMP_MODE_DISABLED;
90}
91#endif /* CONFIG_SECCOMP */
92
93#ifdef CONFIG_SECCOMP_FILTER
94extern void seccomp_filter_release(struct task_struct *tsk);
95extern void get_seccomp_filter(struct task_struct *tsk);
96#else /* CONFIG_SECCOMP_FILTER */
97static inline void seccomp_filter_release(struct task_struct *tsk)
98{
99 return;
100}
101static inline void get_seccomp_filter(struct task_struct *tsk)
102{
103 return;
104}
105#endif /* CONFIG_SECCOMP_FILTER */
106
107#if defined(CONFIG_SECCOMP_FILTER) && defined(CONFIG_CHECKPOINT_RESTORE)
108extern long seccomp_get_filter(struct task_struct *task,
109 unsigned long filter_off, void __user *data);
110extern long seccomp_get_metadata(struct task_struct *task,
111 unsigned long filter_off, void __user *data);
112#else
113static inline long seccomp_get_filter(struct task_struct *task,
114 unsigned long n, void __user *data)
115{
116 return -EINVAL;
117}
118static inline long seccomp_get_metadata(struct task_struct *task,
119 unsigned long filter_off,
120 void __user *data)
121{
122 return -EINVAL;
123}
124#endif /* CONFIG_SECCOMP_FILTER && CONFIG_CHECKPOINT_RESTORE */
125
126#ifdef CONFIG_SECCOMP_CACHE_DEBUG
127struct seq_file;
128
129int proc_pid_seccomp_cache(struct seq_file *m, struct pid_namespace *ns,
130 struct pid *pid, struct task_struct *task);
131#endif
132#endif /* _LINUX_SECCOMP_H */
133

source code of linux/include/linux/seccomp.h