[deliverable/linux.git] / include / linux / seccomp.h

#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 SECCOMP_MODE_DISABLED;
}
#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 */

#if defined(CONFIG_SECCOMP_FILTER) && defined(CONFIG_CHECKPOINT_RESTORE)
extern long seccomp_get_filter(struct task_struct *task,
			       unsigned long filter_off, void __user *data);
#else
static inline long seccomp_get_filter(struct task_struct *task,
				      unsigned long n, void __user *data)
{
	return -EINVAL;
}
#endif /* CONFIG_SECCOMP_FILTER && CONFIG_CHECKPOINT_RESTORE */
#endif /* _LINUX_SECCOMP_H */
Commit	Line	Data
	1	#ifndef _LINUX_SECCOMP_H
	2	#define _LINUX_SECCOMP_H
	3
	4	#include <uapi/linux/seccomp.h>
	5
	6	#define SECCOMP_FILTER_FLAG_MASK (SECCOMP_FILTER_FLAG_TSYNC)
	7
	8	#ifdef CONFIG_SECCOMP
	9
	10	#include <linux/thread_info.h>
	11	#include <asm/seccomp.h>
	12
	13	struct seccomp_filter;
	14	/**
	15	* struct seccomp - the state of a seccomp'ed process
	16	*
	17	* @mode: indicates one of the valid values above for controlled
	18	* system calls available to a process.
	19	* @filter: must always point to a valid seccomp-filter or NULL as it is
	20	* accessed without locking during system call entry.
	21	*
	22	* @filter must only be accessed from the context of current as there
	23	* is no read locking.
	24	*/
	25	struct seccomp {
	26	int mode;
	27	struct seccomp_filter *filter;
	28	};
	29
	30	#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
	31	extern int __secure_computing(void);
	32	static inline int secure_computing(void)
	33	{
	34	if (unlikely(test_thread_flag(TIF_SECCOMP)))
	35	return __secure_computing();
	36	return 0;
	37	}
	38
	39	#define SECCOMP_PHASE1_OK 0
	40	#define SECCOMP_PHASE1_SKIP 1
	41
	42	extern u32 seccomp_phase1(struct seccomp_data *sd);
	43	int seccomp_phase2(u32 phase1_result);
	44	#else
	45	extern void secure_computing_strict(int this_syscall);
	46	#endif
	47
	48	extern long prctl_get_seccomp(void);
	49	extern long prctl_set_seccomp(unsigned long, char __user *);
	50
	51	static inline int seccomp_mode(struct seccomp *s)
	52	{
	53	return s->mode;
	54	}
	55
	56	#else /* CONFIG_SECCOMP */
	57
	58	#include <linux/errno.h>
	59
	60	struct seccomp { };
	61	struct seccomp_filter { };
	62
	63	#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
	64	static inline int secure_computing(void) { return 0; }
	65	#else
	66	static inline void secure_computing_strict(int this_syscall) { return; }
	67	#endif
	68
	69	static inline long prctl_get_seccomp(void)
	70	{
	71	return -EINVAL;
	72	}
	73
	74	static inline long prctl_set_seccomp(unsigned long arg2, char __user *arg3)
	75	{
	76	return -EINVAL;
	77	}
	78
	79	static inline int seccomp_mode(struct seccomp *s)
	80	{
	81	return SECCOMP_MODE_DISABLED;
	82	}
	83	#endif /* CONFIG_SECCOMP */
	84
	85	#ifdef CONFIG_SECCOMP_FILTER
	86	extern void put_seccomp_filter(struct task_struct *tsk);
	87	extern void get_seccomp_filter(struct task_struct *tsk);
	88	#else /* CONFIG_SECCOMP_FILTER */
	89	static inline void put_seccomp_filter(struct task_struct *tsk)
	90	{
	91	return;
	92	}
	93	static inline void get_seccomp_filter(struct task_struct *tsk)
	94	{
	95	return;
	96	}
	97	#endif /* CONFIG_SECCOMP_FILTER */
	98
	99	#if defined(CONFIG_SECCOMP_FILTER) && defined(CONFIG_CHECKPOINT_RESTORE)
	100	extern long seccomp_get_filter(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	#endif /* CONFIG_SECCOMP_FILTER && CONFIG_CHECKPOINT_RESTORE */
	109	#endif /* _LINUX_SECCOMP_H */