[linux-2.6-block.git] / include / linux / umh.h

#ifndef __LINUX_UMH_H__
#define __LINUX_UMH_H__

#include <linux/gfp.h>
#include <linux/stddef.h>
#include <linux/errno.h>
#include <linux/compiler.h>
#include <linux/workqueue.h>
#include <linux/sysctl.h>

struct cred;
struct file;

#define UMH_NO_WAIT	0	/* don't wait at all */
#define UMH_WAIT_EXEC	1	/* wait for the exec, but not the process */
#define UMH_WAIT_PROC	2	/* wait for the process to complete */
#define UMH_KILLABLE	4	/* wait for EXEC/PROC killable */

struct subprocess_info {
	struct work_struct work;
	struct completion *complete;
	const char *path;
	char **argv;
	char **envp;
	struct file *file;
	int wait;
	int retval;
	pid_t pid;
	int (*init)(struct subprocess_info *info, struct cred *new);
	void (*cleanup)(struct subprocess_info *info);
	void *data;
} __randomize_layout;

extern int
call_usermodehelper(const char *path, char **argv, char **envp, int wait);

extern struct subprocess_info *
call_usermodehelper_setup(const char *path, char **argv, char **envp,
			  gfp_t gfp_mask,
			  int (*init)(struct subprocess_info *info, struct cred *new),
			  void (*cleanup)(struct subprocess_info *), void *data);

struct subprocess_info *call_usermodehelper_setup_file(struct file *file,
			  int (*init)(struct subprocess_info *info, struct cred *new),
			  void (*cleanup)(struct subprocess_info *), void *data);
struct umh_info {
	struct file *pipe_to_umh;
	struct file *pipe_from_umh;
	pid_t pid;
};
int fork_usermode_blob(void *data, size_t len, struct umh_info *info);

extern int
call_usermodehelper_exec(struct subprocess_info *info, int wait);

extern struct ctl_table usermodehelper_table[];

enum umh_disable_depth {
	UMH_ENABLED = 0,
	UMH_FREEZING,
	UMH_DISABLED,
};

extern int __usermodehelper_disable(enum umh_disable_depth depth);
extern void __usermodehelper_set_disable_depth(enum umh_disable_depth depth);

static inline int usermodehelper_disable(void)
{
	return __usermodehelper_disable(UMH_DISABLED);
}

static inline void usermodehelper_enable(void)
{
	__usermodehelper_set_disable_depth(UMH_ENABLED);
}

extern int usermodehelper_read_trylock(void);
extern long usermodehelper_read_lock_wait(long timeout);
extern void usermodehelper_read_unlock(void);

#endif /* __LINUX_UMH_H__ */
Commit	Line	Data
c1f3fa2a LR	1	#ifndef __LINUX_UMH_H__
	2	#define __LINUX_UMH_H__
	3
	4	#include <linux/gfp.h>
	5	#include <linux/stddef.h>
	6	#include <linux/errno.h>
	7	#include <linux/compiler.h>
	8	#include <linux/workqueue.h>
	9	#include <linux/sysctl.h>
	10
	11	struct cred;
	12	struct file;
	13
	14	#define UMH_NO_WAIT 0 /* don't wait at all */
	15	#define UMH_WAIT_EXEC 1 /* wait for the exec, but not the process */
	16	#define UMH_WAIT_PROC 2 /* wait for the process to complete */
	17	#define UMH_KILLABLE 4 /* wait for EXEC/PROC killable */
	18
	19	struct subprocess_info {
	20	struct work_struct work;
	21	struct completion *complete;
	22	const char *path;
	23	char **argv;
	24	char **envp;
449325b5	25	struct file *file;
c1f3fa2a LR	26	int wait;
c1f3fa2a LR	27	int retval;
449325b5	28	pid_t pid;
c1f3fa2a LR	29	int (init)(struct subprocess_info info, struct cred *new);
	30	void (cleanup)(struct subprocess_info info);
	31	void *data;
	32	} __randomize_layout;
	33
	34	extern int
	35	call_usermodehelper(const char path, char argv, char *envp, int wait);
	36
	37	extern struct subprocess_info *
	38	call_usermodehelper_setup(const char path, char argv, char *envp,
	39	gfp_t gfp_mask,
	40	int (init)(struct subprocess_info info, struct cred *new),
	41	void (cleanup)(struct subprocess_info ), void *data);
	42
449325b5 AS	43	struct subprocess_info call_usermodehelper_setup_file(struct file file,
	44	int (init)(struct subprocess_info info, struct cred *new),
	45	void (cleanup)(struct subprocess_info ), void *data);
	46	struct umh_info {
	47	struct file *pipe_to_umh;
	48	struct file *pipe_from_umh;
	49	pid_t pid;
	50	};
	51	int fork_usermode_blob(void data, size_t len, struct umh_info info);
	52
c1f3fa2a LR	53	extern int
	54	call_usermodehelper_exec(struct subprocess_info *info, int wait);
	55
	56	extern struct ctl_table usermodehelper_table[];
	57
	58	enum umh_disable_depth {
	59	UMH_ENABLED = 0,
	60	UMH_FREEZING,
	61	UMH_DISABLED,
	62	};
	63
	64	extern int __usermodehelper_disable(enum umh_disable_depth depth);
	65	extern void __usermodehelper_set_disable_depth(enum umh_disable_depth depth);
	66
	67	static inline int usermodehelper_disable(void)
	68	{
	69	return __usermodehelper_disable(UMH_DISABLED);
	70	}
	71
	72	static inline void usermodehelper_enable(void)
	73	{
	74	__usermodehelper_set_disable_depth(UMH_ENABLED);
	75	}
	76
	77	extern int usermodehelper_read_trylock(void);
	78	extern long usermodehelper_read_lock_wait(long timeout);
	79	extern void usermodehelper_read_unlock(void);
	80
	81	#endif /* __LINUX_UMH_H__ */