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(depth: UMH_DISABLED);
57}
58
59static inline void usermodehelper_enable(void)
60{
61 __usermodehelper_set_disable_depth(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