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