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