1#ifndef __LINUX_KMOD_H__
2#define __LINUX_KMOD_H__
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22#include <linux/gfp.h>
23#include <linux/stddef.h>
24#include <linux/errno.h>
25#include <linux/compiler.h>
26#include <linux/workqueue.h>
27#include <linux/sysctl.h>
28
29#define KMOD_PATH_LEN 256
30
31#ifdef CONFIG_MODULES
32extern char modprobe_path[];
33
34
35extern __printf(2, 3)
36int __request_module(bool wait, const char *name, ...);
37#define request_module(mod...) __request_module(true, mod)
38#define request_module_nowait(mod...) __request_module(false, mod)
39#define try_then_request_module(x, mod...) \
40 ((x) ?: (__request_module(true, mod), (x)))
41#else
42static inline int request_module(const char *name, ...) { return -ENOSYS; }
43static inline int request_module_nowait(const char *name, ...) { return -ENOSYS; }
44#define try_then_request_module(x, mod...) (x)
45#endif
46
47
48struct cred;
49struct file;
50
51#define UMH_NO_WAIT 0
52#define UMH_WAIT_EXEC 1
53#define UMH_WAIT_PROC 2
54#define UMH_KILLABLE 4
55
56struct subprocess_info {
57 struct work_struct work;
58 struct completion *complete;
59 char *path;
60 char **argv;
61 char **envp;
62 int wait;
63 int retval;
64 int (*init)(struct subprocess_info *info, struct cred *new);
65 void (*cleanup)(struct subprocess_info *info);
66 void *data;
67};
68
69extern int
70call_usermodehelper_fns(char *path, char **argv, char **envp, int wait,
71 int (*init)(struct subprocess_info *info, struct cred *new),
72 void (*cleanup)(struct subprocess_info *), void *data);
73
74static inline int
75call_usermodehelper(char *path, char **argv, char **envp, int wait)
76{
77 return call_usermodehelper_fns(path, argv, envp, wait,
78 NULL, NULL, NULL);
79}
80
81extern struct ctl_table usermodehelper_table[];
82
83enum umh_disable_depth {
84 UMH_ENABLED = 0,
85 UMH_FREEZING,
86 UMH_DISABLED,
87};
88
89extern void usermodehelper_init(void);
90
91extern int __usermodehelper_disable(enum umh_disable_depth depth);
92extern void __usermodehelper_set_disable_depth(enum umh_disable_depth depth);
93
94static inline int usermodehelper_disable(void)
95{
96 return __usermodehelper_disable(UMH_DISABLED);
97}
98
99static inline void usermodehelper_enable(void)
100{
101 __usermodehelper_set_disable_depth(UMH_ENABLED);
102}
103
104extern int usermodehelper_read_trylock(void);
105extern long usermodehelper_read_lock_wait(long timeout);
106extern void usermodehelper_read_unlock(void);
107
108#endif
109