1 files changed, 138 insertions, 0 deletions
diff --git a/include/linux/kmod.h b/include/linux/kmod.h
new file mode 100644
index 00000000..dd99c329
--- /dev/null
+++ b/include/linux/kmod.h
@@ -0,0 +1,138 @@
+#ifndef __LINUX_KMOD_H__
+#define __LINUX_KMOD_H__
+
+/*
+ *	include/linux/kmod.h
+ *
+ *      This program is free software; you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation; either version 2 of the License, or
+ *      (at your option) any later version.
+ *
+ *      This program is distributed in the hope that it will be useful,
+ *      but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *      GNU General Public License for more details.
+ *
+ *      You should have received a copy of the GNU General Public License
+ *      along with this program; if not, write to the Free Software
+ *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/gfp.h>
+#include <linux/stddef.h>
+#include <linux/errno.h>
+#include <linux/compiler.h>
+#include <linux/workqueue.h>
+#include <linux/sysctl.h>
+
+#define KMOD_PATH_LEN 256
+
+#ifdef CONFIG_MODULES
+extern char modprobe_path[]; /* for sysctl */
+/* modprobe exit status on success, -ve on error.  Return value
+ * usually useless though. */
+extern __printf(2, 3)
+int __request_module(bool wait, const char *name, ...);
+#define request_module(mod...) __request_module(true, mod)
+#define request_module_nowait(mod...) __request_module(false, mod)
+#define try_then_request_module(x, mod...) \
+	((x) ?: (__request_module(true, mod), (x)))
+#else
+static inline int request_module(const char *name, ...) { return -ENOSYS; }
+static inline int request_module_nowait(const char *name, ...) { return -ENOSYS; }
+#define try_then_request_module(x, mod...) (x)
+#endif
+
+
+struct cred;
+struct file;
+
+#define UMH_NO_WAIT	0	/* don't wait at all */
+#define UMH_WAIT_EXEC	1	/* wait for the exec, but not the process */
+#define UMH_WAIT_PROC	2	/* wait for the process to complete */
+#define UMH_KILLABLE	4	/* wait for EXEC/PROC killable */
+
+struct subprocess_info {
+	struct work_struct work;
+	struct completion *complete;
+	char *path;
+	char **argv;
+	char **envp;
+	int wait;
+	int retval;
+	int (*init)(struct subprocess_info *info, struct cred *new);
+	void (*cleanup)(struct subprocess_info *info);
+	void *data;
+};
+
+/* Allocate a subprocess_info structure */
+struct subprocess_info *call_usermodehelper_setup(char *path, char **argv,
+						  char **envp, gfp_t gfp_mask);
+
+/* Set various pieces of state into the subprocess_info structure */
+void call_usermodehelper_setfns(struct subprocess_info *info,
+		    int (*init)(struct subprocess_info *info, struct cred *new),
+		    void (*cleanup)(struct subprocess_info *info),
+		    void *data);
+
+/* Actually execute the sub-process */
+int call_usermodehelper_exec(struct subprocess_info *info, int wait);
+
+/* Free the subprocess_info. This is only needed if you're not going
+   to call call_usermodehelper_exec */
+void call_usermodehelper_freeinfo(struct subprocess_info *info);
+
+static inline int
+call_usermodehelper_fns(char *path, char **argv, char **envp, int wait,
+			int (*init)(struct subprocess_info *info, struct cred *new),
+			void (*cleanup)(struct subprocess_info *), void *data)
+{
+	struct subprocess_info *info;
+	gfp_t gfp_mask = (wait == UMH_NO_WAIT) ? GFP_ATOMIC : GFP_KERNEL;
+
+	info = call_usermodehelper_setup(path, argv, envp, gfp_mask);
+
+	if (info == NULL)
+		return -ENOMEM;
+
+	call_usermodehelper_setfns(info, init, cleanup, data);
+
+	return call_usermodehelper_exec(info, wait);
+}
+
+static inline int
+call_usermodehelper(char *path, char **argv, char **envp, int wait)
+{
+	return call_usermodehelper_fns(path, argv, envp, wait,
+				       NULL, NULL, NULL);
+}
+
+extern struct ctl_table usermodehelper_table[];
+
+enum umh_disable_depth {
+	UMH_ENABLED = 0,
+	UMH_FREEZING,
+	UMH_DISABLED,
+};
+
+extern void usermodehelper_init(void);
+
+extern int __usermodehelper_disable(enum umh_disable_depth depth);
+extern void __usermodehelper_set_disable_depth(enum umh_disable_depth depth);
+
+static inline int usermodehelper_disable(void)
+{
+	return __usermodehelper_disable(UMH_DISABLED);
+}
+
+static inline void usermodehelper_enable(void)
+{
+	__usermodehelper_set_disable_depth(UMH_ENABLED);
+}
+
+extern int usermodehelper_read_trylock(void);
+extern long usermodehelper_read_lock_wait(long timeout);
+extern void usermodehelper_read_unlock(void);
+
+#endif /* __LINUX_KMOD_H__ */