#ifndef _UEVENT_H
#define _UEVENT_H

/*
 * buffer for environment variables, the kernel's size in
 * lib/kobject_uevent.c should fit in
*/
#define HOTPLUG_BUFFER_SIZE		2048
#define HOTPLUG_NUM_ENVP		32
#define OBJECT_SIZE			512

#ifndef NETLINK_KOBJECT_UEVENT
#define NETLINK_KOBJECT_UEVENT		15
#endif

struct udev;

struct uevent {
	struct list_head node;
	struct list_head merge_node;
	struct udev_device *udev;
	char buffer[HOTPLUG_BUFFER_SIZE + OBJECT_SIZE];
	char *devpath;
	char *action;
	char *kernel;
	const char *wwid;
	unsigned long seqnum;
	char *envp[HOTPLUG_NUM_ENVP];
};

int is_uevent_busy(void);

int uevent_listen(struct udev *udev);
int uevent_dispatch(int (*store_uev)(struct uevent *, void * trigger_data),
		    void * trigger_data);
int uevent_get_major(const struct uevent *uev);
int uevent_get_minor(const struct uevent *uev);
int uevent_get_disk_ro(const struct uevent *uev);
char *uevent_get_dm_name(const struct uevent *uev);
char *uevent_get_dm_path(const struct uevent *uev);
char *uevent_get_dm_action(const struct uevent *uev);
bool uevent_is_mpath(const struct uevent *uev);

#endif /* _UEVENT_H */