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 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 20 struct 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 33 extern int 34 call_usermodehelper(const char *path, char **argv, char **envp, int wait); 35 36 extern struct subprocess_info * 37 call_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 42 extern int 43 call_usermodehelper_exec(struct subprocess_info *info, int wait); 44 45 enum umh_disable_depth { 46 UMH_ENABLED = 0, 47 UMH_FREEZING, 48 UMH_DISABLED, 49 }; 50 51 extern int __usermodehelper_disable(enum umh_disable_depth depth); 52 extern void __usermodehelper_set_disable_depth(enum umh_disable_depth depth); 53 54 static inline int usermodehelper_disable(void) 55 { 56 return __usermodehelper_disable(UMH_DISABLED); 57 } 58 59 static inline void usermodehelper_enable(void) 60 { 61 __usermodehelper_set_disable_depth(UMH_ENABLED); 62 } 63 64 extern int usermodehelper_read_trylock(void); 65 extern long usermodehelper_read_lock_wait(long timeout); 66 extern void usermodehelper_read_unlock(void); 67 68 #endif /* __LINUX_UMH_H__ */ 69