[linux-block.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 | \
					 SECCOMP_FILTER_FLAG_TSYNC_ESRCH | \
					 SECCOMP_FILTER_FLAG_WAIT_KILLABLE_RECV)

/* sizeof() the first published struct seccomp_notif_addfd */
#define SECCOMP_NOTIFY_ADDFD_SIZE_VER0 24
#define SECCOMP_NOTIFY_ADDFD_SIZE_LATEST SECCOMP_NOTIFY_ADDFD_SIZE_VER0

#ifdef CONFIG_SECCOMP

#include <linux/thread_info.h>
#include <linux/atomic.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_count: number of seccomp filters
 * @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;
	atomic_t filter_count;
	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_syscall_work(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 { };
struct seccomp_data;

#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
static inline int secure_computing(void) { return 0; }
static inline int __secure_computing(const 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 seccomp_filter_release(struct task_struct *tsk);
extern void get_seccomp_filter(struct task_struct *tsk);
#else  /* CONFIG_SECCOMP_FILTER */
static inline void seccomp_filter_release(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 */

#ifdef CONFIG_SECCOMP_CACHE_DEBUG
struct seq_file;

int proc_pid_seccomp_cache(struct seq_file *m, struct pid_namespace *ns,
			   struct pid *pid, struct task_struct *task);
#endif
#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 \| \
51891498	10	SECCOMP_FILTER_FLAG_NEW_LISTENER \| \
c2aa2dfe SD	11	SECCOMP_FILTER_FLAG_TSYNC_ESRCH \| \
c2aa2dfe SD	12	SECCOMP_FILTER_FLAG_WAIT_KILLABLE_RECV)
c2e1f2e3	13
7cf97b12 SD	14	/* sizeof() the first published struct seccomp_notif_addfd */
	15	#define SECCOMP_NOTIFY_ADDFD_SIZE_VER0 24
	16	#define SECCOMP_NOTIFY_ADDFD_SIZE_LATEST SECCOMP_NOTIFY_ADDFD_SIZE_VER0
	17
1da177e4 LT	18	#ifdef CONFIG_SECCOMP
1da177e4 LT	19
1da177e4	20	#include <linux/thread_info.h>
c818c03b	21	#include <linux/atomic.h>
1da177e4 LT	22	#include <asm/seccomp.h>
1da177e4 LT	23
e2cfabdf WD	24	struct seccomp_filter;
	25	/**
	26	* struct seccomp - the state of a seccomp'ed process
	27	*
	28	* @mode: indicates one of the valid values above for controlled
	29	* system calls available to a process.
b9069728	30	* @filter_count: number of seccomp filters
dbd95212 KC	31	* @filter: must always point to a valid seccomp-filter or NULL as it is
dbd95212 KC	32	* accessed without locking during system call entry.
e2cfabdf WD	33	*
e2cfabdf WD	34	* @filter must only be accessed from the context of current as there
dbd95212	35	* is no read locking.
e2cfabdf	36	*/
932ecebb WD	37	struct seccomp {
932ecebb WD	38	int mode;
c818c03b	39	atomic_t filter_count;
e2cfabdf	40	struct seccomp_filter *filter;
932ecebb	41	};
1da177e4	42
a4412fc9	43	#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
2f275de5	44	extern int __secure_computing(const struct seccomp_data *sd);
fefad9ef	45	static inline int secure_computing(void)
1da177e4	46	{
23d67a54	47	if (unlikely(test_syscall_work(SECCOMP)))
fefad9ef	48	return __secure_computing(NULL);
acf3b2c7	49	return 0;
1da177e4	50	}
a4412fc9 AL	51	#else
	52	extern void secure_computing_strict(int this_syscall);
	53	#endif
e4da89d0	54
1d9d02fe	55	extern long prctl_get_seccomp(void);
a5662e4d	56	extern long prctl_set_seccomp(unsigned long, void __user *);
1d9d02fe	57
932ecebb	58	static inline int seccomp_mode(struct seccomp *s)
5cec93c2 AL	59	{
	60	return s->mode;
	61	}
	62
1da177e4 LT	63	#else /* CONFIG_SECCOMP */
1da177e4 LT	64
42a17ad2 RB	65	#include <linux/errno.h>
42a17ad2 RB	66
932ecebb	67	struct seccomp { };
e2cfabdf	68	struct seccomp_filter { };
3135f5b7	69	struct seccomp_data;
1da177e4	70
a4412fc9	71	#ifdef CONFIG_HAVE_ARCH_SECCOMP_FILTER
fefad9ef	72	static inline int secure_computing(void) { return 0; }
3135f5b7	73	static inline int __secure_computing(const struct seccomp_data *sd) { return 0; }
a4412fc9	74	#else
e4da89d0	75	static inline void secure_computing_strict(int this_syscall) { return; }
a4412fc9	76	#endif
1da177e4	77
1d9d02fe AA	78	static inline long prctl_get_seccomp(void)
	79	{
	80	return -EINVAL;
	81	}
	82
e2cfabdf	83	static inline long prctl_set_seccomp(unsigned long arg2, char __user *arg3)
1d9d02fe AA	84	{
	85	return -EINVAL;
	86	}
	87
932ecebb	88	static inline int seccomp_mode(struct seccomp *s)
5cec93c2	89	{
221272f9	90	return SECCOMP_MODE_DISABLED;
5cec93c2	91	}
1da177e4 LT	92	#endif /* CONFIG_SECCOMP */
1da177e4 LT	93
e2cfabdf	94	#ifdef CONFIG_SECCOMP_FILTER
3a15fb6e	95	extern void seccomp_filter_release(struct task_struct *tsk);
e2cfabdf	96	extern void get_seccomp_filter(struct task_struct *tsk);
e2cfabdf	97	#else /* CONFIG_SECCOMP_FILTER */
3a15fb6e	98	static inline void seccomp_filter_release(struct task_struct *tsk)
e2cfabdf WD	99	{
	100	return;
	101	}
	102	static inline void get_seccomp_filter(struct task_struct *tsk)
	103	{
	104	return;
	105	}
	106	#endif /* CONFIG_SECCOMP_FILTER */
f8e529ed TA	107
	108	#if defined(CONFIG_SECCOMP_FILTER) && defined(CONFIG_CHECKPOINT_RESTORE)
	109	extern long seccomp_get_filter(struct task_struct *task,
	110	unsigned long filter_off, void __user *data);
26500475 TA	111	extern long seccomp_get_metadata(struct task_struct *task,
26500475 TA	112	unsigned long filter_off, void __user *data);
f8e529ed TA	113	#else
	114	static inline long seccomp_get_filter(struct task_struct *task,
	115	unsigned long n, void __user *data)
	116	{
	117	return -EINVAL;
	118	}
26500475 TA	119	static inline long seccomp_get_metadata(struct task_struct *task,
	120	unsigned long filter_off,
	121	void __user *data)
	122	{
	123	return -EINVAL;
	124	}
f8e529ed	125	#endif /* CONFIG_SECCOMP_FILTER && CONFIG_CHECKPOINT_RESTORE */
0d8315dd YZ	126
	127	#ifdef CONFIG_SECCOMP_CACHE_DEBUG
	128	struct seq_file;
	129
	130	int proc_pid_seccomp_cache(struct seq_file m, struct pid_namespace ns,
	131	struct pid pid, struct task_struct task);
	132	#endif
1da177e4	133	#endif /* _LINUX_SECCOMP_H */