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