device.h

   1 #ifndef __LL_H
   2 #define __LL_H
   3
   4 #include <libubox/avl.h>
   5 #include <netinet/in.h>
   6
   7 struct device;
   8 struct device_hotplug_ops;
   9
  10 typedef int (*device_state_cb)(struct device *, bool up);
  11
  12 enum {
  13         DEV_ATTR_TYPE,
  14         DEV_ATTR_NAME,
  15         DEV_ATTR_IFNAME,
  16         DEV_ATTR_MTU,
  17         DEV_ATTR_MACADDR,
  18         DEV_ATTR_TXQUEUELEN,
  19         __DEV_ATTR_MAX,
  20 };
  21
  22 enum dev_change_type {
  23         DEV_CONFIG_NO_CHANGE,
  24         DEV_CONFIG_APPLIED,
  25         DEV_CONFIG_RECREATE,
  26 };
  27
  28 struct device_type {
  29         struct list_head list;
  30         const char *name;
  31
  32         const struct config_param_list *config_params;
  33
  34         struct device *(*create)(struct blob_attr *attr);
  35         void (*config_init)(struct device *);
  36         enum dev_change_type (*reload)(struct device *, struct blob_attr *);
  37         void (*dump_info)(struct device *, struct blob_buf *buf);
  38         void (*dump_stats)(struct device *, struct blob_buf *buf);
  39         int (*check_state)(struct device *);
  40         void (*free)(struct device *);
  41 };
  42
  43 enum {
  44         DEV_OPT_MTU             = (1 << 0),
  45         DEV_OPT_MACADDR         = (1 << 1),
  46         DEV_OPT_TXQUEUELEN      = (1 << 2)
  47 };
  48
  49 /*
  50  * link layer device. typically represents a linux network device.
  51  * can be used to support VLANs as well
  52  */
  53 struct device {
  54         const struct device_type *type;
  55
  56         struct avl_node avl;
  57         struct list_head users;
  58
  59         char ifname[IFNAMSIZ + 1];
  60         int ifindex;
  61
  62         struct blob_attr *config;
  63         bool config_pending;
  64         bool present;
  65         int active;
  66
  67         bool current_config;
  68         bool default_config;
  69
  70         /* set interface up or down */
  71         device_state_cb set_state;
  72
  73         const struct device_hotplug_ops *hotplug_ops;
  74
  75         /* settings */
  76         unsigned int flags;
  77
  78         unsigned int mtu;
  79         unsigned int txqueuelen;
  80         uint8_t macaddr[6];
  81 };
  82
  83 /* events broadcasted to all users of a device */
  84 enum device_event {
  85         DEV_EVENT_ADD,
  86         DEV_EVENT_REMOVE,
  87
  88         DEV_EVENT_SETUP,
  89         DEV_EVENT_TEARDOWN,
  90         DEV_EVENT_UP,
  91         DEV_EVENT_DOWN,
  92
  93         DEV_EVENT_LINK_UP,
  94         DEV_EVENT_LINK_DOWN,
  95 };
  96
  97 /*
  98  * device dependency with callbacks
  99  */
 100 struct device_user {
 101         struct list_head list;
 102
 103         bool claimed;
 104         struct device *dev;
 105         void (*cb)(struct device_user *, enum device_event);
 106 };
 107
 108 struct device_hotplug_ops {
 109         int (*add)(struct device *main, struct device *member);
 110         int (*del)(struct device *main, struct device *member);
 111 };
 112
 113 extern const struct config_param_list device_attr_list;
 114 extern const struct device_type simple_device_type;
 115 extern const struct device_type bridge_device_type;
 116
 117 struct device *device_create(const char *name, const struct device_type *type,
 118                              struct blob_attr *config);
 119 void device_init_settings(struct device *dev, struct blob_attr **tb);
 120 void device_init_pending(void);
 121
 122 void device_reset_config(void);
 123 void device_reset_old(void);
 124
 125 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name);
 126 int device_init(struct device *iface, const struct device_type *type, const char *ifname);
 127 void device_cleanup(struct device *iface);
 128 struct device *device_get(const char *name, bool create);
 129 void device_add_user(struct device_user *dep, struct device *iface);
 130 void device_remove_user(struct device_user *dep);
 131
 132 void device_set_present(struct device *dev, bool state);
 133 int device_claim(struct device_user *dep);
 134 void device_release(struct device_user *dep);
 135 int device_check_state(struct device *dev);
 136 void device_dump_status(struct blob_buf *b, struct device *dev);
 137
 138 static inline void
 139 device_free(struct device *dev)
 140 {
 141         dev->type->free(dev);
 142 }
 143
 144 void device_free_unused(struct device *dev);
 145
 146 struct device *get_vlan_device_chain(const char *ifname, bool create);
 147
 148 #endif