device.h

   1 #ifndef __LL_H
   2 #define __LL_H
   3
   4 #include <libubox/avl.h>
   5
   6 struct device;
   7 struct device_hotplug_ops;
   8
   9 typedef int (*device_state_cb)(struct device *, bool up);
  10
  11 struct device_type {
  12         const char *name;
  13
  14         void (*dump_status)(struct device *, struct blob_buf *buf);
  15         int (*check_state)(struct device *);
  16         void (*free)(struct device *);
  17 };
  18
  19 /*
  20  * link layer device. typically represents a linux network device.
  21  * can be used to support VLANs as well
  22  */
  23 struct device {
  24         const struct device_type *type;
  25
  26         struct avl_node avl;
  27         struct list_head users;
  28
  29         char ifname[IFNAMSIZ + 1];
  30         int ifindex;
  31
  32         bool present;
  33         int active;
  34
  35         /* set interface up or down */
  36         device_state_cb set_state;
  37
  38         const struct device_hotplug_ops *hotplug_ops;
  39 };
  40
  41 /* events broadcasted to all users of a device */
  42 enum device_event {
  43         DEV_EVENT_ADD,
  44         DEV_EVENT_REMOVE,
  45
  46         DEV_EVENT_SETUP,
  47         DEV_EVENT_TEARDOWN,
  48         DEV_EVENT_UP,
  49         DEV_EVENT_DOWN,
  50
  51         DEV_EVENT_LINK_UP,
  52         DEV_EVENT_LINK_DOWN,
  53 };
  54
  55 /*
  56  * device dependency with callbacks
  57  */
  58 struct device_user {
  59         struct list_head list;
  60
  61         struct device *dev;
  62         void (*cb)(struct device_user *, enum device_event);
  63 };
  64
  65 struct device_hotplug_ops {
  66         int (*add)(struct device *main, struct device *member);
  67         int (*del)(struct device *main, struct device *member);
  68 };
  69
  70 void init_virtual_device(struct device *dev, const struct device_type *type, const char *name);
  71 int init_device(struct device *iface, const struct device_type *type, const char *ifname);
  72 void cleanup_device(struct device *iface);
  73 struct device *get_device(const char *name, bool create);
  74 void add_device_user(struct device_user *dep, struct device *iface);
  75 void remove_device_user(struct device_user *dep);
  76
  77 void set_device_present(struct device *dev, bool state);
  78 int claim_device(struct device *dev);
  79 void release_device(struct device *dev);
  80 int check_device_state(struct device *dev);
  81
  82 struct device *get_vlan_device_chain(const char *ifname, bool create);
  83
  84 #endif