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_user;
   9 struct device_hotplug_ops;
  10
  11 typedef int (*device_state_cb)(struct device *, bool up);
  12
  13 enum {
  14         DEV_ATTR_TYPE,
  15         DEV_ATTR_IFNAME,
  16         DEV_ATTR_MTU,
  17         DEV_ATTR_MACADDR,
  18         DEV_ATTR_TXQUEUELEN,
  19         DEV_ATTR_ENABLED,
  20         __DEV_ATTR_MAX,
  21 };
  22
  23 enum dev_change_type {
  24         DEV_CONFIG_NO_CHANGE,
  25         DEV_CONFIG_APPLIED,
  26         DEV_CONFIG_RECREATE,
  27 };
  28
  29 struct device_type {
  30         struct list_head list;
  31         const char *name;
  32
  33         const struct config_param_list *config_params;
  34
  35         struct device *(*create)(const char *name, struct blob_attr *attr);
  36         void (*config_init)(struct device *);
  37         enum dev_change_type (*reload)(struct device *, struct blob_attr *);
  38         void (*dump_info)(struct device *, struct blob_buf *buf);
  39         void (*dump_stats)(struct device *, struct blob_buf *buf);
  40         int (*check_state)(struct device *);
  41         void (*free)(struct device *);
  42 };
  43
  44 enum {
  45         DEV_OPT_MTU             = (1 << 0),
  46         DEV_OPT_MACADDR         = (1 << 1),
  47         DEV_OPT_TXQUEUELEN      = (1 << 2)
  48 };
  49
  50 /* events broadcasted to all users of a device */
  51 enum device_event {
  52         DEV_EVENT_ADD,
  53         DEV_EVENT_REMOVE,
  54
  55         DEV_EVENT_SETUP,
  56         DEV_EVENT_TEARDOWN,
  57         DEV_EVENT_UP,
  58         DEV_EVENT_DOWN,
  59
  60         DEV_EVENT_LINK_UP,
  61         DEV_EVENT_LINK_DOWN,
  62 };
  63
  64 /*
  65  * device dependency with callbacks
  66  */
  67 struct device_user {
  68         struct list_head list;
  69
  70         bool claimed;
  71         bool hotplug;
  72
  73         struct device *dev;
  74         void (*cb)(struct device_user *, enum device_event);
  75 };
  76
  77 /*
  78  * link layer device. typically represents a linux network device.
  79  * can be used to support VLANs as well
  80  */
  81 struct device {
  82         const struct device_type *type;
  83
  84         struct avl_node avl;
  85         struct list_head users;
  86
  87         char ifname[IFNAMSIZ + 1];
  88         int ifindex;
  89
  90         struct blob_attr *config;
  91         bool config_pending;
  92         bool sys_present;
  93         bool present;
  94         int active;
  95         bool external;
  96         bool disabled;
  97
  98         bool current_config;
  99         bool default_config;
 100
 101         /* set interface up or down */
 102         device_state_cb set_state;
 103
 104         const struct device_hotplug_ops *hotplug_ops;
 105
 106         struct device_user parent;
 107
 108         /* settings */
 109         unsigned int flags;
 110
 111         unsigned int mtu;
 112         unsigned int txqueuelen;
 113         uint8_t macaddr[6];
 114 };
 115
 116 struct device_hotplug_ops {
 117         int (*prepare)(struct device *dev);
 118         int (*add)(struct device *main, struct device *member);
 119         int (*del)(struct device *main, struct device *member);
 120 };
 121
 122 extern const struct config_param_list device_attr_list;
 123 extern const struct device_type simple_device_type;
 124 extern const struct device_type bridge_device_type;
 125
 126 void device_lock(void);
 127 void device_unlock(void);
 128
 129 struct device *device_create(const char *name, const struct device_type *type,
 130                              struct blob_attr *config);
 131 void device_init_settings(struct device *dev, struct blob_attr **tb);
 132 void device_init_pending(void);
 133
 134 enum dev_change_type
 135 device_set_config(struct device *dev, const struct device_type *type,
 136                   struct blob_attr *attr);
 137
 138 void device_reset_config(void);
 139 void device_reset_old(void);
 140
 141 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name);
 142 int device_init(struct device *iface, const struct device_type *type, const char *ifname);
 143 void device_cleanup(struct device *iface);
 144 struct device *device_get(const char *name, int create);
 145 void device_add_user(struct device_user *dep, struct device *iface);
 146 void device_remove_user(struct device_user *dep);
 147
 148 void device_set_present(struct device *dev, bool state);
 149 void device_set_disabled(struct device *dev, bool value);
 150 int device_claim(struct device_user *dep);
 151 void device_release(struct device_user *dep);
 152 int device_check_state(struct device *dev);
 153 void device_dump_status(struct blob_buf *b, struct device *dev);
 154
 155 void device_free(struct device *dev);
 156 void device_free_unused(struct device *dev);
 157
 158 struct device *get_vlan_device_chain(const char *ifname, bool create);
 159 void alias_notify_device(const char *name, struct device *dev);
 160
 161 #endif