1 files changed, 69 insertions, 0 deletions
diff --git a/include/linux/umh.h b/include/linux/umh.h
new file mode 100644
index 000000000000..244aff638220
--- /dev/null
+++ b/include/linux/umh.h
@@ -0,0 +1,69 @@
+#ifndef __LINUX_UMH_H__
+#define __LINUX_UMH_H__
+
+#include <linux/gfp.h>
+#include <linux/stddef.h>
+#include <linux/errno.h>
+#include <linux/compiler.h>
+#include <linux/workqueue.h>
+#include <linux/sysctl.h>
+
+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;
+	const 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;
+} __randomize_layout;
+
+extern int
+call_usermodehelper(const char *path, char **argv, char **envp, int wait);
+
+extern struct subprocess_info *
+call_usermodehelper_setup(const char *path, char **argv, char **envp,
+			  gfp_t gfp_mask,
+			  int (*init)(struct subprocess_info *info, struct cred *new),
+			  void (*cleanup)(struct subprocess_info *), void *data);
+
+extern int
+call_usermodehelper_exec(struct subprocess_info *info, int wait);
+
+extern struct ctl_table usermodehelper_table[];
+
+enum umh_disable_depth {
+	UMH_ENABLED = 0,
+	UMH_FREEZING,
+	UMH_DISABLED,
+};
+
+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_UMH_H__ */