root/include/linux/seccomp.h

INCLUDED FROM

DEFINITIONS

1. secure_computing
2. seccomp_mode
3. secure_computing
4. secure_computing_strict
5. prctl_get_seccomp
6. prctl_set_seccomp
7. seccomp_mode
8. put_seccomp_filter
9. get_seccomp_filter
10. seccomp_get_filter
11. seccomp_get_metadata

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