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#ifndef __LL_H
#define __LL_H
#include <libubox/avl.h>
struct device;
struct device_hotplug_ops;
typedef int (*device_state_cb)(struct device *, bool up);
struct device_type {
const char *name;
int (*check_state)(struct device *);
void (*free)(struct device *);
};
/*
* link layer device. typically represents a linux network device.
* can be used to support VLANs as well
*/
struct device {
const struct device_type *type;
struct avl_node avl;
struct list_head users;
char ifname[IFNAMSIZ + 1];
int ifindex;
bool present;
int active;
/* set interface up or down */
device_state_cb set_state;
const struct device_hotplug_ops *hotplug_ops;
};
/* events broadcasted to all users of a device */
enum device_event {
/* device has been added to the system and can be brought up */
DEV_EVENT_ADD,
/* device has been removed */
DEV_EVENT_REMOVE,
/* device is being brought up */
DEV_EVENT_SETUP,
/* device is being brought down */
DEV_EVENT_TEARDOWN,
/* device has been brought up */
DEV_EVENT_UP,
/* device has been brought down */
DEV_EVENT_DOWN,
/* device has changed its link state to up */
DEV_EVENT_LINK_UP,
/* device has changed its link state to down */
DEV_EVENT_LINK_DOWN,
};
/*
* device dependency with callbacks
*/
struct device_user {
struct list_head list;
struct device *dev;
void (*cb)(struct device_user *, enum device_event);
};
struct device_hotplug_ops {
int (*add)(struct device *main, struct device *member);
int (*del)(struct device *main, struct device *member);
};
int init_device(struct device *iface, const struct device_type *type, const char *ifname);
void cleanup_device(struct device *iface);
struct device *get_device(const char *name, bool create);
void add_device_user(struct device_user *dep, struct device *iface);
void remove_device_user(struct device_user *dep);
void set_device_present(struct device *dev, bool state);
int claim_device(struct device *dev);
void release_device(struct device *dev);
int check_device_state(struct device *dev);
struct device *get_vlan_device_chain(const char *ifname, bool create);
#endif
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