[mirror_ubuntu-bionic-kernel.git] / include / linux / seccomp.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_SECCOMP_H
#define _LINUX_SECCOMP_H

#include <uapi/linux/seccomp.h>

#define SECCOMP_FILTER_FLAG_MASK	(SECCOMP_FILTER_FLAG_TSYNC | \
					 SECCOMP_FILTER_FLAG_LOG)

#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(const struct seccomp_data *sd);
static inline int secure_computing(const struct seccomp_data *sd)
{
	if (unlikely(test_thread_flag(TIF_SECCOMP)))
		return  __secure_computing(sd);
	return 0;
}
#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(struct seccomp_data *sd) { 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
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _LINUX_SECCOMP_H
	3	#define _LINUX_SECCOMP_H
	4
607ca46e	5	#include <uapi/linux/seccomp.h>
e2cfabdf	6
e66a3997 TH	7	#define SECCOMP_FILTER_FLAG_MASK (SECCOMP_FILTER_FLAG_TSYNC \| \
e66a3997 TH	8	SECCOMP_FILTER_FLAG_LOG)
c2e1f2e3	9
1da177e4 LT	10	#ifdef CONFIG_SECCOMP
1da177e4 LT	11
1da177e4 LT	12	#include <linux/thread_info.h>
	13	#include <asm/seccomp.h>
	14
e2cfabdf WD	15	struct seccomp_filter;
	16	/**
	17	* struct seccomp - the state of a seccomp'ed process
	18	*
	19	* @mode: indicates one of the valid values above for controlled
	20	* system calls available to a process.
dbd95212 KC	21	* @filter: must always point to a valid seccomp-filter or NULL as it is
dbd95212 KC	22	* accessed without locking during system call entry.
e2cfabdf WD	23	*
e2cfabdf WD	24	* @filter must only be accessed from the context of current as there
dbd95212	25	* is no read locking.
e2cfabdf	26	*/
932ecebb WD	27	struct seccomp {
932ecebb WD	28	int mode;
e2cfabdf	29	struct seccomp_filter *filter;
932ecebb	30	};
1da177e4	31
a4412fc9	32	#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
2f275de5 AL	33	extern int __secure_computing(const struct seccomp_data *sd);
2f275de5 AL	34	static inline int secure_computing(const struct seccomp_data *sd)
1da177e4 LT	35	{
1da177e4 LT	36	if (unlikely(test_thread_flag(TIF_SECCOMP)))
2f275de5	37	return __secure_computing(sd);
acf3b2c7	38	return 0;
1da177e4	39	}
a4412fc9 AL	40	#else
	41	extern void secure_computing_strict(int this_syscall);
	42	#endif
e4da89d0	43
1d9d02fe	44	extern long prctl_get_seccomp(void);
e2cfabdf	45	extern long prctl_set_seccomp(unsigned long, char __user *);
1d9d02fe	46
932ecebb	47	static inline int seccomp_mode(struct seccomp *s)
5cec93c2 AL	48	{
	49	return s->mode;
	50	}
	51
1da177e4 LT	52	#else /* CONFIG_SECCOMP */
1da177e4 LT	53
42a17ad2 RB	54	#include <linux/errno.h>
42a17ad2 RB	55
932ecebb	56	struct seccomp { };
e2cfabdf	57	struct seccomp_filter { };
1da177e4	58
a4412fc9	59	#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
2f275de5	60	static inline int secure_computing(struct seccomp_data *sd) { return 0; }
a4412fc9	61	#else
e4da89d0	62	static inline void secure_computing_strict(int this_syscall) { return; }
a4412fc9	63	#endif
1da177e4	64
1d9d02fe AA	65	static inline long prctl_get_seccomp(void)
	66	{
	67	return -EINVAL;
	68	}
	69
e2cfabdf	70	static inline long prctl_set_seccomp(unsigned long arg2, char __user *arg3)
1d9d02fe AA	71	{
	72	return -EINVAL;
	73	}
	74
932ecebb	75	static inline int seccomp_mode(struct seccomp *s)
5cec93c2	76	{
221272f9	77	return SECCOMP_MODE_DISABLED;
5cec93c2	78	}
1da177e4 LT	79	#endif /* CONFIG_SECCOMP */
1da177e4 LT	80
e2cfabdf WD	81	#ifdef CONFIG_SECCOMP_FILTER
	82	extern void put_seccomp_filter(struct task_struct *tsk);
	83	extern void get_seccomp_filter(struct task_struct *tsk);
e2cfabdf WD	84	#else /* CONFIG_SECCOMP_FILTER */
	85	static inline void put_seccomp_filter(struct task_struct *tsk)
	86	{
	87	return;
	88	}
	89	static inline void get_seccomp_filter(struct task_struct *tsk)
	90	{
	91	return;
	92	}
	93	#endif /* CONFIG_SECCOMP_FILTER */
f8e529ed TA	94
	95	#if defined(CONFIG_SECCOMP_FILTER) && defined(CONFIG_CHECKPOINT_RESTORE)
	96	extern long seccomp_get_filter(struct task_struct *task,
	97	unsigned long filter_off, void __user *data);
	98	#else
	99	static inline long seccomp_get_filter(struct task_struct *task,
	100	unsigned long n, void __user *data)
	101	{
	102	return -EINVAL;
	103	}
	104	#endif /* CONFIG_SECCOMP_FILTER && CONFIG_CHECKPOINT_RESTORE */
1da177e4	105	#endif /* _LINUX_SECCOMP_H */