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TOMOYO Linux Cross Reference
Linux/include/linux/kmod.h

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  1 #ifndef __LINUX_KMOD_H__
  2 #define __LINUX_KMOD_H__
  3 
  4 /*
  5  *      include/linux/kmod.h
  6  *
  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.
 11  *
 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.
 16  *
 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.
 20  */
 21 
 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
 32 extern char modprobe_path[]; /* for sysctl */
 33 /* modprobe exit status on success, -ve on error.  Return value
 34  * usually useless though. */
 35 extern __printf(2, 3)
 36 int __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
 42 static inline int request_module(const char *name, ...) { return -ENOSYS; }
 43 static inline int request_module_nowait(const char *name, ...) { return -ENOSYS; }
 44 #define try_then_request_module(x, mod...) (x)
 45 #endif
 46 
 47 
 48 struct cred;
 49 struct file;
 50 
 51 #define UMH_NO_WAIT     0       /* don't wait at all */
 52 #define UMH_WAIT_EXEC   1       /* wait for the exec, but not the process */
 53 #define UMH_WAIT_PROC   2       /* wait for the process to complete */
 54 #define UMH_KILLABLE    4       /* wait for EXEC/PROC killable */
 55 
 56 struct subprocess_info {
 57         struct work_struct work;
 58         struct completion *complete;
 59         const 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 } __randomize_layout;
 68 
 69 extern int
 70 call_usermodehelper(const char *path, char **argv, char **envp, int wait);
 71 
 72 extern struct subprocess_info *
 73 call_usermodehelper_setup(const char *path, char **argv, char **envp,
 74                           gfp_t gfp_mask,
 75                           int (*init)(struct subprocess_info *info, struct cred *new),
 76                           void (*cleanup)(struct subprocess_info *), void *data);
 77 
 78 extern int
 79 call_usermodehelper_exec(struct subprocess_info *info, int wait);
 80 
 81 extern struct ctl_table usermodehelper_table[];
 82 
 83 enum umh_disable_depth {
 84         UMH_ENABLED = 0,
 85         UMH_FREEZING,
 86         UMH_DISABLED,
 87 };
 88 
 89 extern int __usermodehelper_disable(enum umh_disable_depth depth);
 90 extern void __usermodehelper_set_disable_depth(enum umh_disable_depth depth);
 91 
 92 static inline int usermodehelper_disable(void)
 93 {
 94         return __usermodehelper_disable(UMH_DISABLED);
 95 }
 96 
 97 static inline void usermodehelper_enable(void)
 98 {
 99         __usermodehelper_set_disable_depth(UMH_ENABLED);
100 }
101 
102 extern int usermodehelper_read_trylock(void);
103 extern long usermodehelper_read_lock_wait(long timeout);
104 extern void usermodehelper_read_unlock(void);
105 
106 #endif /* __LINUX_KMOD_H__ */
107 

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