1 #ifndef __LINUX_KMOD_H__
2 #define __LINUX_KMOD_H__
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include <linux/gfp.h>
23 #include <linux/stddef.h>
24 #include <linux/errno.h>
25 #include <linux/compiler.h>
27 #define KMOD_PATH_LEN 256
30 extern char modprobe_path
[]; /* for sysctl */
31 /* modprobe exit status on success, -ve on error. Return value
32 * usually useless though. */
33 extern int __request_module(bool wait
, const char *name
, ...) \
34 __attribute__((format(printf
, 2, 3)));
35 #define request_module(mod...) __request_module(true, mod)
36 #define request_module_nowait(mod...) __request_module(false, mod)
37 #define try_then_request_module(x, mod...) \
38 ((x) ?: (__request_module(true, mod), (x)))
40 static inline int request_module(const char *name
, ...) { return -ENOSYS
; }
41 static inline int request_module_nowait(const char *name
, ...) { return -ENOSYS
; }
42 #define try_then_request_module(x, mod...) (x)
48 struct subprocess_info
;
50 /* Allocate a subprocess_info structure */
51 struct subprocess_info
*call_usermodehelper_setup(char *path
, char **argv
,
52 char **envp
, gfp_t gfp_mask
);
54 /* Set various pieces of state into the subprocess_info structure */
55 void call_usermodehelper_setkeys(struct subprocess_info
*info
,
56 struct key
*session_keyring
);
57 int call_usermodehelper_stdinpipe(struct subprocess_info
*sub_info
,
59 void call_usermodehelper_setcleanup(struct subprocess_info
*info
,
60 void (*cleanup
)(char **argv
, char **envp
));
63 UMH_NO_WAIT
= -1, /* don't wait at all */
64 UMH_WAIT_EXEC
= 0, /* wait for the exec, but not the process */
65 UMH_WAIT_PROC
= 1, /* wait for the process to complete */
68 /* Actually execute the sub-process */
69 int call_usermodehelper_exec(struct subprocess_info
*info
, enum umh_wait wait
);
71 /* Free the subprocess_info. This is only needed if you're not going
72 to call call_usermodehelper_exec */
73 void call_usermodehelper_freeinfo(struct subprocess_info
*info
);
76 call_usermodehelper(char *path
, char **argv
, char **envp
, enum umh_wait wait
)
78 struct subprocess_info
*info
;
79 gfp_t gfp_mask
= (wait
== UMH_NO_WAIT
) ? GFP_ATOMIC
: GFP_KERNEL
;
81 info
= call_usermodehelper_setup(path
, argv
, envp
, gfp_mask
);
84 return call_usermodehelper_exec(info
, wait
);
88 call_usermodehelper_keys(char *path
, char **argv
, char **envp
,
89 struct key
*session_keyring
, enum umh_wait wait
)
91 struct subprocess_info
*info
;
92 gfp_t gfp_mask
= (wait
== UMH_NO_WAIT
) ? GFP_ATOMIC
: GFP_KERNEL
;
94 info
= call_usermodehelper_setup(path
, argv
, envp
, gfp_mask
);
98 call_usermodehelper_setkeys(info
, session_keyring
);
99 return call_usermodehelper_exec(info
, wait
);
102 extern void usermodehelper_init(void);
105 extern int call_usermodehelper_pipe(char *path
, char *argv
[], char *envp
[],
108 extern int usermodehelper_disable(void);
109 extern void usermodehelper_enable(void);
111 #endif /* __LINUX_KMOD_H__ */
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