]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/linux/kmod.h
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 /* modprobe exit status on success, -ve on error. Return value
31 * usually useless though. */
32 extern int request_module(const char * name
, ...) __attribute__ ((format (printf
, 1, 2)));
33 #define try_then_request_module(x, mod...) ((x) ?: (request_module(mod), (x)))
35 static inline int request_module(const char * name
, ...) { return -ENOSYS
; }
36 #define try_then_request_module(x, mod...) (x)
42 struct subprocess_info
;
44 /* Allocate a subprocess_info structure */
45 struct subprocess_info
*call_usermodehelper_setup(char *path
, char **argv
,
46 char **envp
, gfp_t gfp_mask
);
48 /* Set various pieces of state into the subprocess_info structure */
49 void call_usermodehelper_setkeys(struct subprocess_info
*info
,
50 struct key
*session_keyring
);
51 int call_usermodehelper_stdinpipe(struct subprocess_info
*sub_info
,
53 void call_usermodehelper_setcleanup(struct subprocess_info
*info
,
54 void (*cleanup
)(char **argv
, char **envp
));
57 UMH_NO_WAIT
= -1, /* don't wait at all */
58 UMH_WAIT_EXEC
= 0, /* wait for the exec, but not the process */
59 UMH_WAIT_PROC
= 1, /* wait for the process to complete */
62 /* Actually execute the sub-process */
63 int call_usermodehelper_exec(struct subprocess_info
*info
, enum umh_wait wait
);
65 /* Free the subprocess_info. This is only needed if you're not going
66 to call call_usermodehelper_exec */
67 void call_usermodehelper_freeinfo(struct subprocess_info
*info
);
70 call_usermodehelper(char *path
, char **argv
, char **envp
, enum umh_wait wait
)
72 struct subprocess_info
*info
;
73 gfp_t gfp_mask
= (wait
== UMH_NO_WAIT
) ? GFP_ATOMIC
: GFP_KERNEL
;
75 info
= call_usermodehelper_setup(path
, argv
, envp
, gfp_mask
);
78 return call_usermodehelper_exec(info
, wait
);
82 call_usermodehelper_keys(char *path
, char **argv
, char **envp
,
83 struct key
*session_keyring
, enum umh_wait wait
)
85 struct subprocess_info
*info
;
86 gfp_t gfp_mask
= (wait
== UMH_NO_WAIT
) ? GFP_ATOMIC
: GFP_KERNEL
;
88 info
= call_usermodehelper_setup(path
, argv
, envp
, gfp_mask
);
92 call_usermodehelper_setkeys(info
, session_keyring
);
93 return call_usermodehelper_exec(info
, wait
);
96 extern void usermodehelper_init(void);
99 extern int call_usermodehelper_pipe(char *path
, char *argv
[], char *envp
[],
102 extern int usermodehelper_disable(void);
103 extern void usermodehelper_enable(void);
105 #endif /* __LINUX_KMOD_H__ */