[mirror_ubuntu-jammy-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 | \
					 SECCOMP_FILTER_FLAG_SPEC_ALLOW | \
					 SECCOMP_FILTER_FLAG_NEW_LISTENER)

#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(void)
{
	if (unlikely(test_thread_flag(TIF_SECCOMP)))
		return  __secure_computing(NULL);
	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, void __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);
extern long seccomp_get_metadata(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;
}
static inline long seccomp_get_metadata(struct task_struct *task,
					unsigned long filter_off,
					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
6a21cc50 TA	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)
c2e1f2e3	11
1da177e4 LT	12	#ifdef CONFIG_SECCOMP
1da177e4 LT	13
1da177e4 LT	14	#include <linux/thread_info.h>
	15	#include <asm/seccomp.h>
	16
e2cfabdf WD	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.
dbd95212 KC	23	* @filter: must always point to a valid seccomp-filter or NULL as it is
dbd95212 KC	24	* accessed without locking during system call entry.
e2cfabdf WD	25	*
e2cfabdf WD	26	* @filter must only be accessed from the context of current as there
dbd95212	27	* is no read locking.
e2cfabdf	28	*/
932ecebb WD	29	struct seccomp {
932ecebb WD	30	int mode;
e2cfabdf	31	struct seccomp_filter *filter;
932ecebb	32	};
1da177e4	33
a4412fc9	34	#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
2f275de5	35	extern int __secure_computing(const struct seccomp_data *sd);
fefad9ef	36	static inline int secure_computing(void)
1da177e4 LT	37	{
1da177e4 LT	38	if (unlikely(test_thread_flag(TIF_SECCOMP)))
fefad9ef	39	return __secure_computing(NULL);
acf3b2c7	40	return 0;
1da177e4	41	}
a4412fc9 AL	42	#else
	43	extern void secure_computing_strict(int this_syscall);
	44	#endif
e4da89d0	45
1d9d02fe	46	extern long prctl_get_seccomp(void);
a5662e4d	47	extern long prctl_set_seccomp(unsigned long, void __user *);
1d9d02fe	48
932ecebb	49	static inline int seccomp_mode(struct seccomp *s)
5cec93c2 AL	50	{
	51	return s->mode;
	52	}
	53
1da177e4 LT	54	#else /* CONFIG_SECCOMP */
1da177e4 LT	55
42a17ad2 RB	56	#include <linux/errno.h>
42a17ad2 RB	57
932ecebb	58	struct seccomp { };
e2cfabdf	59	struct seccomp_filter { };
1da177e4	60
a4412fc9	61	#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
fefad9ef	62	static inline int secure_computing(void) { return 0; }
a4412fc9	63	#else
e4da89d0	64	static inline void secure_computing_strict(int this_syscall) { return; }
a4412fc9	65	#endif
1da177e4	66
1d9d02fe AA	67	static inline long prctl_get_seccomp(void)
	68	{
	69	return -EINVAL;
	70	}
	71
e2cfabdf	72	static inline long prctl_set_seccomp(unsigned long arg2, char __user *arg3)
1d9d02fe AA	73	{
	74	return -EINVAL;
	75	}
	76
932ecebb	77	static inline int seccomp_mode(struct seccomp *s)
5cec93c2	78	{
221272f9	79	return SECCOMP_MODE_DISABLED;
5cec93c2	80	}
1da177e4 LT	81	#endif /* CONFIG_SECCOMP */
1da177e4 LT	82
e2cfabdf WD	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);
e2cfabdf WD	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 */
f8e529ed TA	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);
26500475 TA	100	extern long seccomp_get_metadata(struct task_struct *task,
26500475 TA	101	unsigned long filter_off, void __user *data);
f8e529ed TA	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	}
26500475 TA	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	}
f8e529ed	114	#endif /* CONFIG_SECCOMP_FILTER && CONFIG_CHECKPOINT_RESTORE */
1da177e4	115	#endif /* _LINUX_SECCOMP_H */