cregit-Linux how code gets into the kernel

Release 4.15 include/linux/umh.h

Directory: include/linux
#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;
	
int wait;
	
int retval;
	
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);

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); }

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

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extern int usermodehelper_read_trylock(void); extern long usermodehelper_read_lock_wait(long timeout); extern void usermodehelper_read_unlock(void); #endif /* __LINUX_UMH_H__ */

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Directory: include/linux
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