[linux-block.git] / include / linux / sysctl.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * sysctl.h: General linux system control interface
 *
 * Begun 24 March 1995, Stephen Tweedie
 *
 ****************************************************************
 ****************************************************************
 **
 **  WARNING:
 **  The values in this file are exported to user space via 
 **  the sysctl() binary interface.  Do *NOT* change the
 **  numbering of any existing values here, and do not change
 **  any numbers within any one set of values.  If you have to
 **  redefine an existing interface, use a new number for it.
 **  The kernel will then return -ENOTDIR to any application using
 **  the old binary interface.
 **
 ****************************************************************
 ****************************************************************
 */
#ifndef _LINUX_SYSCTL_H
#define _LINUX_SYSCTL_H

#include <linux/list.h>
#include <linux/rcupdate.h>
#include <linux/wait.h>
#include <linux/rbtree.h>
#include <linux/uidgid.h>
#include <uapi/linux/sysctl.h>

/* For the /proc/sys support */
struct completion;
struct ctl_table;
struct nsproxy;
struct ctl_table_root;
struct ctl_table_header;
struct ctl_dir;

/* Keep the same order as in fs/proc/proc_sysctl.c */
#define SYSCTL_ZERO			((void *)&sysctl_vals[0])
#define SYSCTL_ONE			((void *)&sysctl_vals[1])
#define SYSCTL_TWO			((void *)&sysctl_vals[2])
#define SYSCTL_THREE			((void *)&sysctl_vals[3])
#define SYSCTL_FOUR			((void *)&sysctl_vals[4])
#define SYSCTL_ONE_HUNDRED		((void *)&sysctl_vals[5])
#define SYSCTL_TWO_HUNDRED		((void *)&sysctl_vals[6])
#define SYSCTL_ONE_THOUSAND		((void *)&sysctl_vals[7])
#define SYSCTL_THREE_THOUSAND		((void *)&sysctl_vals[8])
#define SYSCTL_INT_MAX			((void *)&sysctl_vals[9])

/* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
#define SYSCTL_MAXOLDUID		((void *)&sysctl_vals[10])
#define SYSCTL_NEG_ONE			((void *)&sysctl_vals[11])

extern const int sysctl_vals[];

#define SYSCTL_LONG_ZERO	((void *)&sysctl_long_vals[0])
#define SYSCTL_LONG_ONE		((void *)&sysctl_long_vals[1])
#define SYSCTL_LONG_MAX		((void *)&sysctl_long_vals[2])

extern const unsigned long sysctl_long_vals[];

typedef int proc_handler(struct ctl_table *ctl, int write, void *buffer,
		size_t *lenp, loff_t *ppos);

int proc_dostring(struct ctl_table *, int, void *, size_t *, loff_t *);
int proc_dobool(struct ctl_table *table, int write, void *buffer,
		size_t *lenp, loff_t *ppos);
int proc_dointvec(struct ctl_table *, int, void *, size_t *, loff_t *);
int proc_douintvec(struct ctl_table *, int, void *, size_t *, loff_t *);
int proc_dointvec_minmax(struct ctl_table *, int, void *, size_t *, loff_t *);
int proc_douintvec_minmax(struct ctl_table *table, int write, void *buffer,
		size_t *lenp, loff_t *ppos);
int proc_dou8vec_minmax(struct ctl_table *table, int write, void *buffer,
			size_t *lenp, loff_t *ppos);
int proc_dointvec_jiffies(struct ctl_table *, int, void *, size_t *, loff_t *);
int proc_dointvec_ms_jiffies_minmax(struct ctl_table *table, int write,
		void *buffer, size_t *lenp, loff_t *ppos);
int proc_dointvec_userhz_jiffies(struct ctl_table *, int, void *, size_t *,
		loff_t *);
int proc_dointvec_ms_jiffies(struct ctl_table *, int, void *, size_t *,
		loff_t *);
int proc_doulongvec_minmax(struct ctl_table *, int, void *, size_t *, loff_t *);
int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int, void *,
		size_t *, loff_t *);
int proc_do_large_bitmap(struct ctl_table *, int, void *, size_t *, loff_t *);
int proc_do_static_key(struct ctl_table *table, int write, void *buffer,
		size_t *lenp, loff_t *ppos);

/*
 * Register a set of sysctl names by calling register_sysctl_table
 * with an initialised array of struct ctl_table's.  An entry with 
 * NULL procname terminates the table.  table->de will be
 * set up by the registration and need not be initialised in advance.
 *
 * sysctl names can be mirrored automatically under /proc/sys.  The
 * procname supplied controls /proc naming.
 *
 * The table's mode will be honoured for proc-fs access.
 *
 * Leaf nodes in the sysctl tree will be represented by a single file
 * under /proc; non-leaf nodes will be represented by directories.  A
 * null procname disables /proc mirroring at this node.
 *
 * The data and maxlen fields of the ctl_table
 * struct enable minimal validation of the values being written to be
 * performed, and the mode field allows minimal authentication.
 * 
 * There must be a proc_handler routine for any terminal nodes
 * mirrored under /proc/sys (non-terminals are handled by a built-in
 * directory handler).  Several default handlers are available to
 * cover common cases.
 */

/* Support for userspace poll() to watch for changes */
struct ctl_table_poll {
	atomic_t event;
	wait_queue_head_t wait;
};

static inline void *proc_sys_poll_event(struct ctl_table_poll *poll)
{
	return (void *)(unsigned long)atomic_read(&poll->event);
}

#define __CTL_TABLE_POLL_INITIALIZER(name) {				\
	.event = ATOMIC_INIT(0),					\
	.wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait) }

#define DEFINE_CTL_TABLE_POLL(name)					\
	struct ctl_table_poll name = __CTL_TABLE_POLL_INITIALIZER(name)

/* A sysctl table is an array of struct ctl_table: */
struct ctl_table {
	const char *procname;		/* Text ID for /proc/sys, or zero */
	void *data;
	int maxlen;
	umode_t mode;
	struct ctl_table *child;	/* Deprecated */
	proc_handler *proc_handler;	/* Callback for text formatting */
	struct ctl_table_poll *poll;
	void *extra1;
	void *extra2;
} __randomize_layout;

struct ctl_node {
	struct rb_node node;
	struct ctl_table_header *header;
};

/* struct ctl_table_header is used to maintain dynamic lists of
   struct ctl_table trees. */
struct ctl_table_header {
	union {
		struct {
			struct ctl_table *ctl_table;
			int used;
			int count;
			int nreg;
		};
		struct rcu_head rcu;
	};
	struct completion *unregistering;
	struct ctl_table *ctl_table_arg;
	struct ctl_table_root *root;
	struct ctl_table_set *set;
	struct ctl_dir *parent;
	struct ctl_node *node;
	struct hlist_head inodes; /* head for proc_inode->sysctl_inodes */
};

struct ctl_dir {
	/* Header must be at the start of ctl_dir */
	struct ctl_table_header header;
	struct rb_root root;
};

struct ctl_table_set {
	int (*is_seen)(struct ctl_table_set *);
	struct ctl_dir dir;
};

struct ctl_table_root {
	struct ctl_table_set default_set;
	struct ctl_table_set *(*lookup)(struct ctl_table_root *root);
	void (*set_ownership)(struct ctl_table_header *head,
			      struct ctl_table *table,
			      kuid_t *uid, kgid_t *gid);
	int (*permissions)(struct ctl_table_header *head, struct ctl_table *table);
};

/* struct ctl_path describes where in the hierarchy a table is added */
struct ctl_path {
	const char *procname;
};

#ifdef CONFIG_SYSCTL

#define DECLARE_SYSCTL_BASE(_name, _table)				\
static struct ctl_table _name##_base_table[] = {			\
	{								\
		.procname	= #_name,				\
		.mode		= 0555,					\
		.child		= _table,				\
	},								\
	{ },								\
}

extern int __register_sysctl_base(struct ctl_table *base_table);

#define register_sysctl_base(_name) __register_sysctl_base(_name##_base_table)

void proc_sys_poll_notify(struct ctl_table_poll *poll);

extern void setup_sysctl_set(struct ctl_table_set *p,
	struct ctl_table_root *root,
	int (*is_seen)(struct ctl_table_set *));
extern void retire_sysctl_set(struct ctl_table_set *set);

struct ctl_table_header *__register_sysctl_table(
	struct ctl_table_set *set,
	const char *path, struct ctl_table *table);
struct ctl_table_header *__register_sysctl_paths(
	struct ctl_table_set *set,
	const struct ctl_path *path, struct ctl_table *table);
struct ctl_table_header *register_sysctl(const char *path, struct ctl_table *table);
struct ctl_table_header *register_sysctl_table(struct ctl_table * table);
struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
						struct ctl_table *table);

void unregister_sysctl_table(struct ctl_table_header * table);

extern int sysctl_init_bases(void);
extern void __register_sysctl_init(const char *path, struct ctl_table *table,
				 const char *table_name);
#define register_sysctl_init(path, table) __register_sysctl_init(path, table, #table)
extern struct ctl_table_header *register_sysctl_mount_point(const char *path);

void do_sysctl_args(void);
int do_proc_douintvec(struct ctl_table *table, int write,
		      void *buffer, size_t *lenp, loff_t *ppos,
		      int (*conv)(unsigned long *lvalp,
				  unsigned int *valp,
				  int write, void *data),
		      void *data);

extern int pwrsw_enabled;
extern int unaligned_enabled;
extern int unaligned_dump_stack;
extern int no_unaligned_warning;

extern struct ctl_table sysctl_mount_point[];

#else /* CONFIG_SYSCTL */

#define DECLARE_SYSCTL_BASE(_name, _table)

static inline int __register_sysctl_base(struct ctl_table *base_table)
{
	return 0;
}

#define register_sysctl_base(table) __register_sysctl_base(table)

static inline struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
{
	return NULL;
}

static inline void register_sysctl_init(const char *path, struct ctl_table *table)
{
}

static inline struct ctl_table_header *register_sysctl_mount_point(const char *path)
{
	return NULL;
}

static inline struct ctl_table_header *register_sysctl_paths(
			const struct ctl_path *path, struct ctl_table *table)
{
	return NULL;
}

static inline struct ctl_table_header *register_sysctl(const char *path, struct ctl_table *table)
{
	return NULL;
}

static inline void unregister_sysctl_table(struct ctl_table_header * table)
{
}

static inline void setup_sysctl_set(struct ctl_table_set *p,
	struct ctl_table_root *root,
	int (*is_seen)(struct ctl_table_set *))
{
}

static inline void do_sysctl_args(void)
{
}
#endif /* CONFIG_SYSCTL */

int sysctl_max_threads(struct ctl_table *table, int write, void *buffer,
		size_t *lenp, loff_t *ppos);

#endif /* _LINUX_SYSCTL_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* sysctl.h: General linux system control interface
	4	*
	5	* Begun 24 March 1995, Stephen Tweedie
	6	*
	7	****************************************************************
	8	****************************************************************
	9	**
7cc13edc	10	** WARNING:
1da177e4	11	** The values in this file are exported to user space via
7cc13edc EB	12	** the sysctl() binary interface. Do NOT change the
	13	** numbering of any existing values here, and do not change
	14	** any numbers within any one set of values. If you have to
93aec204	15	** redefine an existing interface, use a new number for it.
7cc13edc EB	16	** The kernel will then return -ENOTDIR to any application using
	17	** the old binary interface.
	18	**
1da177e4 LT	19	****************************************************************
	20	****************************************************************
	21	*/
1da177e4 LT	22	#ifndef _LINUX_SYSCTL_H
	23	#define _LINUX_SYSCTL_H
	24
d4ed803c	25	#include <linux/list.h>
684adca4	26	#include <linux/rcupdate.h>
f1ecf068	27	#include <linux/wait.h>
ac13ac6f	28	#include <linux/rbtree.h>
e79c6a4f	29	#include <linux/uidgid.h>
607ca46e	30	#include <uapi/linux/sysctl.h>
1da177e4	31
805b5d5e	32	/* For the /proc/sys support */
db3f6001	33	struct completion;
1ff007eb	34	struct ctl_table;
e51b6ba0	35	struct nsproxy;
d7321cd6	36	struct ctl_table_root;
f7e6ced4	37	struct ctl_table_header;
7ec66d06	38	struct ctl_dir;
f7e6ced4	39
eec4844f	40	/* Keep the same order as in fs/proc/proc_sysctl.c */
4c7f24f8 TZ	41	#define SYSCTL_ZERO ((void *)&sysctl_vals[0])
	42	#define SYSCTL_ONE ((void *)&sysctl_vals[1])
	43	#define SYSCTL_TWO ((void *)&sysctl_vals[2])
	44	#define SYSCTL_THREE ((void *)&sysctl_vals[3])
78e36f3b XN	45	#define SYSCTL_FOUR ((void *)&sysctl_vals[4])
	46	#define SYSCTL_ONE_HUNDRED ((void *)&sysctl_vals[5])
	47	#define SYSCTL_TWO_HUNDRED ((void *)&sysctl_vals[6])
	48	#define SYSCTL_ONE_THOUSAND ((void *)&sysctl_vals[7])
	49	#define SYSCTL_THREE_THOUSAND ((void *)&sysctl_vals[8])
	50	#define SYSCTL_INT_MAX ((void *)&sysctl_vals[9])
eec4844f	51
54771613 LC	52	/* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
54771613 LC	53	#define SYSCTL_MAXOLDUID ((void *)&sysctl_vals[10])
4c7f24f8	54	#define SYSCTL_NEG_ONE ((void *)&sysctl_vals[11])
54771613	55
eec4844f MC	56	extern const int sysctl_vals[];
eec4844f MC	57
b1f2aff8 LC	58	#define SYSCTL_LONG_ZERO ((void *)&sysctl_long_vals[0])
	59	#define SYSCTL_LONG_ONE ((void *)&sysctl_long_vals[1])
	60	#define SYSCTL_LONG_MAX ((void *)&sysctl_long_vals[2])
	61
	62	extern const unsigned long sysctl_long_vals[];
	63
32927393 CH	64	typedef int proc_handler(struct ctl_table ctl, int write, void buffer,
	65	size_t lenp, loff_t ppos);
	66
	67	int proc_dostring(struct ctl_table , int, void , size_t , loff_t );
a2071573 JH	68	int proc_dobool(struct ctl_table table, int write, void buffer,
a2071573 JH	69	size_t lenp, loff_t ppos);
32927393 CH	70	int proc_dointvec(struct ctl_table , int, void , size_t , loff_t );
	71	int proc_douintvec(struct ctl_table , int, void , size_t , loff_t );
	72	int proc_dointvec_minmax(struct ctl_table , int, void , size_t , loff_t );
	73	int proc_douintvec_minmax(struct ctl_table table, int write, void buffer,
	74	size_t lenp, loff_t ppos);
cb944413 ED	75	int proc_dou8vec_minmax(struct ctl_table table, int write, void buffer,
cb944413 ED	76	size_t lenp, loff_t ppos);
32927393	77	int proc_dointvec_jiffies(struct ctl_table , int, void , size_t , loff_t );
c381d02b YW	78	int proc_dointvec_ms_jiffies_minmax(struct ctl_table *table, int write,
c381d02b YW	79	void buffer, size_t lenp, loff_t *ppos);
32927393 CH	80	int proc_dointvec_userhz_jiffies(struct ctl_table , int, void , size_t *,
	81	loff_t *);
	82	int proc_dointvec_ms_jiffies(struct ctl_table , int, void , size_t *,
	83	loff_t *);
	84	int proc_doulongvec_minmax(struct ctl_table , int, void , size_t , loff_t );
	85	int proc_doulongvec_ms_jiffies_minmax(struct ctl_table table, int, void ,
	86	size_t , loff_t );
	87	int proc_do_large_bitmap(struct ctl_table , int, void , size_t , loff_t );
	88	int proc_do_static_key(struct ctl_table table, int write, void buffer,
	89	size_t lenp, loff_t ppos);
1da177e4	90
1da177e4 LT	91	/*
1da177e4 LT	92	* Register a set of sysctl names by calling register_sysctl_table
2315ffa0 EB	93	* with an initialised array of struct ctl_table's. An entry with
2315ffa0 EB	94	* NULL procname terminates the table. table->de will be
d99f160a	95	* set up by the registration and need not be initialised in advance.
1da177e4 LT	96	*
	97	* sysctl names can be mirrored automatically under /proc/sys. The
	98	* procname supplied controls /proc naming.
	99	*
88db0aa2	100	* The table's mode will be honoured for proc-fs access.
1da177e4 LT	101	*
	102	* Leaf nodes in the sysctl tree will be represented by a single file
	103	* under /proc; non-leaf nodes will be represented by directories. A
	104	* null procname disables /proc mirroring at this node.
d99f160a	105	*
88db0aa2	106	* The data and maxlen fields of the ctl_table
1da177e4 LT	107	* struct enable minimal validation of the values being written to be
	108	* performed, and the mode field allows minimal authentication.
	109	*
1da177e4 LT	110	* There must be a proc_handler routine for any terminal nodes
	111	* mirrored under /proc/sys (non-terminals are handled by a built-in
	112	* directory handler). Several default handlers are available to
	113	* cover common cases.
	114	*/
	115
f1ecf068 LDM	116	/* Support for userspace poll() to watch for changes */
	117	struct ctl_table_poll {
	118	atomic_t event;
	119	wait_queue_head_t wait;
	120	};
	121
	122	static inline void proc_sys_poll_event(struct ctl_table_poll poll)
	123	{
	124	return (void *)(unsigned long)atomic_read(&poll->event);
	125	}
	126
f1ecf068 LDM	127	#define __CTL_TABLE_POLL_INITIALIZER(name) { \
	128	.event = ATOMIC_INIT(0), \
	129	.wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait) }
	130
	131	#define DEFINE_CTL_TABLE_POLL(name) \
	132	struct ctl_table_poll name = __CTL_TABLE_POLL_INITIALIZER(name)
	133
1da177e4	134	/* A sysctl table is an array of struct ctl_table: */
d5ffb71b	135	struct ctl_table {
1da177e4 LT	136	const char procname; / Text ID for /proc/sys, or zero */
	137	void *data;
	138	int maxlen;
36fcb589	139	umode_t mode;
f728019b	140	struct ctl_table child; / Deprecated */
1da177e4	141	proc_handler proc_handler; / Callback for text formatting */
f1ecf068	142	struct ctl_table_poll *poll;
1da177e4 LT	143	void *extra1;
1da177e4 LT	144	void *extra2;
3859a271	145	} __randomize_layout;
1da177e4	146
ac13ac6f EB	147	struct ctl_node {
	148	struct rb_node node;
	149	struct ctl_table_header *header;
	150	};
	151
1da177e4	152	/* struct ctl_table_header is used to maintain dynamic lists of
d8217f07	153	struct ctl_table trees. */
d5ffb71b	154	struct ctl_table_header {
dfef6dcd AV	155	union {
	156	struct {
	157	struct ctl_table *ctl_table;
dfef6dcd AV	158	int used;
dfef6dcd AV	159	int count;
938aaa4f	160	int nreg;
dfef6dcd AV	161	};
	162	struct rcu_head rcu;
	163	};
330d57fb	164	struct completion *unregistering;
23eb06de	165	struct ctl_table *ctl_table_arg;
e51b6ba0	166	struct ctl_table_root *root;
73455092	167	struct ctl_table_set *set;
7ec66d06	168	struct ctl_dir *parent;
ac13ac6f	169	struct ctl_node *node;
2fd1d2c4	170	struct hlist_head inodes; /* head for proc_inode->sysctl_inodes */
7ec66d06 EB	171	};
	172
	173	struct ctl_dir {
	174	/* Header must be at the start of ctl_dir */
	175	struct ctl_table_header header;
ac13ac6f	176	struct rb_root root;
1da177e4 LT	177	};
1da177e4 LT	178
0ce8974d	179	struct ctl_table_set {
0ce8974d	180	int (is_seen)(struct ctl_table_set );
0e47c99d	181	struct ctl_dir dir;
0ce8974d EB	182	};
	183
	184	struct ctl_table_root {
0ce8974d	185	struct ctl_table_set default_set;
13bcc6a2	186	struct ctl_table_set (lookup)(struct ctl_table_root *root);
e79c6a4f DT	187	void (set_ownership)(struct ctl_table_header head,
	188	struct ctl_table *table,
	189	kuid_t uid, kgid_t gid);
73f7ef43	190	int (permissions)(struct ctl_table_header head, struct ctl_table *table);
0ce8974d EB	191	};
0ce8974d EB	192
29e796fd EB	193	/* struct ctl_path describes where in the hierarchy a table is added */
	194	struct ctl_path {
	195	const char *procname;
29e796fd EB	196	};
29e796fd EB	197
0ce8974d EB	198	#ifdef CONFIG_SYSCTL
0ce8974d EB	199
51cb8dfc LC	200	#define DECLARE_SYSCTL_BASE(_name, _table) \
	201	static struct ctl_table _name##_base_table[] = { \
	202	{ \
	203	.procname = #_name, \
	204	.mode = 0555, \
	205	.child = _table, \
	206	}, \
	207	{ }, \
	208	}
	209
	210	extern int __register_sysctl_base(struct ctl_table *base_table);
	211
	212	#define register_sysctl_base(_name) __register_sysctl_base(_name##_base_table)
	213
0ce8974d EB	214	void proc_sys_poll_notify(struct ctl_table_poll *poll);
	215
	216	extern void setup_sysctl_set(struct ctl_table_set *p,
9eb47c26	217	struct ctl_table_root *root,
0ce8974d	218	int (is_seen)(struct ctl_table_set ));
97324cd8	219	extern void retire_sysctl_set(struct ctl_table_set *set);
0ce8974d	220
6e9d5164	221	struct ctl_table_header *__register_sysctl_table(
60a47a2e	222	struct ctl_table_set *set,
6e9d5164	223	const char path, struct ctl_table table);
e51b6ba0	224	struct ctl_table_header *__register_sysctl_paths(
60a47a2e	225	struct ctl_table_set *set,
e51b6ba0	226	const struct ctl_path path, struct ctl_table table);
fea478d4	227	struct ctl_table_header register_sysctl(const char path, struct ctl_table *table);
d8217f07	228	struct ctl_table_header register_sysctl_table(struct ctl_table table);
29e796fd EB	229	struct ctl_table_header register_sysctl_paths(const struct ctl_path path,
29e796fd EB	230	struct ctl_table *table);
0b4d4147	231
1da177e4 LT	232	void unregister_sysctl_table(struct ctl_table_header * table);
1da177e4 LT	233
d8c0418a	234	extern int sysctl_init_bases(void);
3ddd9a80 XN	235	extern void __register_sysctl_init(const char path, struct ctl_table table,
	236	const char *table_name);
	237	#define register_sysctl_init(path, table) __register_sysctl_init(path, table, #table)
ee9efac4 LC	238	extern struct ctl_table_header register_sysctl_mount_point(const char path);
ee9efac4 LC	239
3db978d4	240	void do_sysctl_args(void);
1998f193 LC	241	int do_proc_douintvec(struct ctl_table *table, int write,
	242	void buffer, size_t lenp, loff_t *ppos,
	243	int (conv)(unsigned long lvalp,
	244	unsigned int *valp,
	245	int write, void *data),
	246	void *data);
f9bd6733	247
2374c09b CH	248	extern int pwrsw_enabled;
	249	extern int unaligned_enabled;
	250	extern int unaligned_dump_stack;
	251	extern int no_unaligned_warning;
	252
f9bd6733 EB	253	extern struct ctl_table sysctl_mount_point[];
f9bd6733 EB	254
0ce8974d	255	#else /* CONFIG_SYSCTL */
51cb8dfc LC	256
	257	#define DECLARE_SYSCTL_BASE(_name, _table)
	258
	259	static inline int __register_sysctl_base(struct ctl_table *base_table)
	260	{
	261	return 0;
	262	}
	263
	264	#define register_sysctl_base(table) __register_sysctl_base(table)
	265
0ce8974d EB	266	static inline struct ctl_table_header register_sysctl_table(struct ctl_table table)
	267	{
	268	return NULL;
	269	}
	270
6213834c MS	271	static inline void register_sysctl_init(const char path, struct ctl_table table)
	272	{
	273	}
	274
6cb91741	275	static inline struct ctl_table_header register_sysctl_mount_point(const char path)
ee9efac4 LC	276	{
	277	return NULL;
	278	}
	279
0ce8974d EB	280	static inline struct ctl_table_header *register_sysctl_paths(
	281	const struct ctl_path path, struct ctl_table table)
	282	{
	283	return NULL;
	284	}
	285
e609a6b8 AB	286	static inline struct ctl_table_header register_sysctl(const char path, struct ctl_table *table)
	287	{
	288	return NULL;
	289	}
	290
0ce8974d EB	291	static inline void unregister_sysctl_table(struct ctl_table_header * table)
	292	{
	293	}
	294
	295	static inline void setup_sysctl_set(struct ctl_table_set *p,
9eb47c26	296	struct ctl_table_root *root,
0ce8974d EB	297	int (is_seen)(struct ctl_table_set ))
	298	{
	299	}
	300
3db978d4 VB	301	static inline void do_sysctl_args(void)
	302	{
	303	}
0ce8974d EB	304	#endif /* CONFIG_SYSCTL */
0ce8974d EB	305
32927393 CH	306	int sysctl_max_threads(struct ctl_table table, int write, void buffer,
32927393 CH	307	size_t lenp, loff_t ppos);
16db3d3f	308
1da177e4	309	#endif /* _LINUX_SYSCTL_H */