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; 25 int wait; 26 int retval; 27 int (*init)(struct subprocess_info *info, struct cred *new); 28 void (*cleanup)(struct subprocess_info *info); 29 void *data; 30 } __randomize_layout; 31 32 extern int 33 call_usermodehelper(const char *path, char **argv, char **envp, int wait); 34 35 extern struct subprocess_info * 36 call_usermodehelper_setup(const char *path, char **argv, char **envp, 37 gfp_t gfp_mask, 38 int (*init)(struct subprocess_info *info, struct cred *new), 39 void (*cleanup)(struct subprocess_info *), void *data); 40 41 extern int 42 call_usermodehelper_exec(struct subprocess_info *info, int wait); 43 44 extern struct ctl_table usermodehelper_table[]; 45 46 enum umh_disable_depth { 47 UMH_ENABLED = 0, 48 UMH_FREEZING, 49 UMH_DISABLED, 50 }; 51 52 extern int __usermodehelper_disable(enum umh_disable_depth depth); 53 extern void __usermodehelper_set_disable_depth(enum umh_disable_depth depth); 54 55 static inline int usermodehelper_disable(void) 56 { 57 return __usermodehelper_disable(UMH_DISABLED); 58 } 59 60 static inline void usermodehelper_enable(void) 61 { 62 __usermodehelper_set_disable_depth(UMH_ENABLED); 63 } 64 65 extern int usermodehelper_read_trylock(void); 66 extern long usermodehelper_read_lock_wait(long timeout); 67 extern void usermodehelper_read_unlock(void); 68 69 #endif /* __LINUX_UMH_H__ */ 70