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

#ifndef _LINUX_SECCOMP_H
#define _LINUX_SECCOMP_H

#include <uapi/linux/seccomp.h>

#define SECCOMP_FILTER_FLAG_MASK        (SECCOMP_FILTER_FLAG_TSYNC)

#ifdef CONFIG_SECCOMP

#include <linux/thread_info.h>
#include <asm/seccomp.h>

struct seccomp_filter;
/**
 * struct seccomp - the state of a seccomp'ed process
 *
 * @mode:  indicates one of the valid values above for controlled
 *         system calls available to a process.
 * @filter: must always point to a valid seccomp-filter or NULL as it is
 *          accessed without locking during system call entry.
 *
 *          @filter must only be accessed from the context of current as there
 *          is no read locking.
 */
struct seccomp {
        int mode;
        struct seccomp_filter *filter;
};

#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
extern int __secure_computing(void);
static inline int secure_computing(void)
{
        if (unlikely(test_thread_flag(TIF_SECCOMP)))
                return  __secure_computing();
        return 0;
}

#define SECCOMP_PHASE1_OK       0
#define SECCOMP_PHASE1_SKIP     1

extern u32 seccomp_phase1(struct seccomp_data *sd);
int seccomp_phase2(u32 phase1_result);
#else
extern void secure_computing_strict(int this_syscall);
#endif

extern long prctl_get_seccomp(void);
extern long prctl_set_seccomp(unsigned long, char __user *);

static inline int seccomp_mode(struct seccomp *s)
{
        return s->mode;
}

#else /* CONFIG_SECCOMP */

#include <linux/errno.h>

struct seccomp { };
struct seccomp_filter { };

#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
static inline int secure_computing(void) { return 0; }
#else
static inline void secure_computing_strict(int this_syscall) { return; }
#endif

static inline long prctl_get_seccomp(void)
{
        return -EINVAL;
}

static inline long prctl_set_seccomp(unsigned long arg2, char __user *arg3)
{
        return -EINVAL;
}

static inline int seccomp_mode(struct seccomp *s)
{
        return 0;
}
#endif /* CONFIG_SECCOMP */

#ifdef CONFIG_SECCOMP_FILTER
extern void put_seccomp_filter(struct task_struct *tsk);
extern void get_seccomp_filter(struct task_struct *tsk);
#else  /* CONFIG_SECCOMP_FILTER */
static inline void put_seccomp_filter(struct task_struct *tsk)
{
        return;
}
static inline void get_seccomp_filter(struct task_struct *tsk)
{
        return;
}
#endif /* CONFIG_SECCOMP_FILTER */
#endif /* _LINUX_SECCOMP_H */