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 11struct cred; 12struct file; 13 14#define UMH_NO_WAIT 0x00 /* don't wait at all */ 15#define UMH_WAIT_EXEC 0x01 /* wait for the exec, but not the process */ 16#define UMH_WAIT_PROC 0x02 /* wait for the process to complete */ 17#define UMH_KILLABLE 0x04 /* wait for EXEC/PROC killable */ 18#define UMH_FREEZABLE 0x08 /* wait for EXEC/PROC freezable */ 19 20struct subprocess_info { 21 struct work_struct work; 22 struct completion *complete; 23 const char *path; 24 char **argv; 25 char **envp; 26 int wait; 27 int retval; 28 int (*init)(struct subprocess_info *info, struct cred *new); 29 void (*cleanup)(struct subprocess_info *info); 30 void *data; 31} __randomize_layout; 32 33extern int 34call_usermodehelper(const char *path, char **argv, char **envp, int wait); 35 36extern struct subprocess_info * 37call_usermodehelper_setup(const char *path, char **argv, char **envp, 38 gfp_t gfp_mask, 39 int (*init)(struct subprocess_info *info, struct cred *new), 40 void (*cleanup)(struct subprocess_info *), void *data); 41 42extern int 43call_usermodehelper_exec(struct subprocess_info *info, int wait); 44 45enum umh_disable_depth { 46 UMH_ENABLED = 0, 47 UMH_FREEZING, 48 UMH_DISABLED, 49}; 50 51extern int __usermodehelper_disable(enum umh_disable_depth depth); 52extern void __usermodehelper_set_disable_depth(enum umh_disable_depth depth); 53 54static inline int usermodehelper_disable(void) 55{ 56 return __usermodehelper_disable(UMH_DISABLED); 57} 58 59static inline void usermodehelper_enable(void) 60{ 61 __usermodehelper_set_disable_depth(UMH_ENABLED); 62} 63 64extern int usermodehelper_read_trylock(void); 65extern long usermodehelper_read_lock_wait(long timeout); 66extern void usermodehelper_read_unlock(void); 67 68#endif /* __LINUX_UMH_H__ */ 69