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_RESTART,
  27         DEV_CONFIG_RECREATE,
  28 };
  29
  30 struct device_type {
  31         struct list_head list;
  32         const char *name;
  33
  34         const struct config_param_list *config_params;
  35
  36         struct device *(*create)(const char *name, struct blob_attr *attr);
  37         void (*config_init)(struct device *);
  38         enum dev_change_type (*reload)(struct device *, struct blob_attr *);
  39         void (*dump_info)(struct device *, struct blob_buf *buf);
  40         void (*dump_stats)(struct device *, struct blob_buf *buf);
  41         int (*check_state)(struct device *);
  42         void (*free)(struct device *);
  43 };
  44
  45 enum {
  46         DEV_OPT_MTU             = (1 << 0),
  47         DEV_OPT_MACADDR         = (1 << 1),
  48         DEV_OPT_TXQUEUELEN      = (1 << 2)
  49 };
  50
  51 /* events broadcasted to all users of a device */
  52 enum device_event {
  53         DEV_EVENT_ADD,
  54         DEV_EVENT_REMOVE,
  55
  56         DEV_EVENT_SETUP,
  57         DEV_EVENT_TEARDOWN,
  58         DEV_EVENT_UP,
  59         DEV_EVENT_DOWN,
  60
  61         DEV_EVENT_LINK_UP,
  62         DEV_EVENT_LINK_DOWN,
  63 };
  64
  65 /*
  66  * device dependency with callbacks
  67  */
  68 struct device_user {
  69         struct list_head list;
  70
  71         bool claimed;
  72         bool hotplug;
  73
  74         struct device *dev;
  75         void (*cb)(struct device_user *, enum device_event);
  76 };
  77
  78 struct device_settings {
  79         unsigned int flags;
  80         unsigned int mtu;
  81         unsigned int txqueuelen;
  82         uint8_t macaddr[6];
  83 };
  84
  85 /*
  86  * link layer device. typically represents a linux network device.
  87  * can be used to support VLANs as well
  88  */
  89 struct device {
  90         const struct device_type *type;
  91
  92         struct avl_node avl;
  93         struct list_head users;
  94
  95         char ifname[IFNAMSIZ + 1];
  96         int ifindex;
  97
  98         struct blob_attr *config;
  99         bool config_pending;
 100         bool sys_present;
 101         bool present;
 102         int active;
 103         bool external;
 104         bool disabled;
 105
 106         bool current_config;
 107         bool default_config;
 108
 109         /* set interface up or down */
 110         device_state_cb set_state;
 111
 112         const struct device_hotplug_ops *hotplug_ops;
 113
 114         struct device_user parent;
 115
 116         struct device_settings orig_settings;
 117         struct device_settings settings;
 118 };
 119
 120 struct device_hotplug_ops {
 121         int (*prepare)(struct device *dev);
 122         int (*add)(struct device *main, struct device *member);
 123         int (*del)(struct device *main, struct device *member);
 124 };
 125
 126 extern const struct config_param_list device_attr_list;
 127 extern const struct device_type simple_device_type;
 128 extern const struct device_type bridge_device_type;
 129
 130 void device_lock(void);
 131 void device_unlock(void);
 132
 133 struct device *device_create(const char *name, const struct device_type *type,
 134                              struct blob_attr *config);
 135 void device_init_settings(struct device *dev, struct blob_attr **tb);
 136 void device_init_pending(void);
 137
 138 enum dev_change_type
 139 device_set_config(struct device *dev, const struct device_type *type,
 140                   struct blob_attr *attr);
 141
 142 void device_reset_config(void);
 143 void device_reset_old(void);
 144
 145 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name);
 146 int device_init(struct device *iface, const struct device_type *type, const char *ifname);
 147 void device_cleanup(struct device *iface);
 148 struct device *device_get(const char *name, int create);
 149 void device_add_user(struct device_user *dep, struct device *iface);
 150 void device_remove_user(struct device_user *dep);
 151
 152 void device_set_present(struct device *dev, bool state);
 153 void device_set_disabled(struct device *dev, bool value);
 154 int device_claim(struct device_user *dep);
 155 void device_release(struct device_user *dep);
 156 int device_check_state(struct device *dev);
 157 void device_dump_status(struct blob_buf *b, struct device *dev);
 158
 159 void device_free(struct device *dev);
 160 void device_free_unused(struct device *dev);
 161
 162 struct device *get_vlan_device_chain(const char *ifname, bool create);
 163 void alias_notify_device(const char *name, struct device *dev);
 164
 165 #endif