struct netdev_dev *netdev_dev_from_name(const char *name);
void netdev_dev_get_devices(const struct netdev_class *,
struct shash *device_list);
+bool netdev_dev_args_equal(const struct netdev_dev *netdev_dev,
+ const struct shash *args);
static inline void netdev_dev_assert_class(const struct netdev_dev *netdev_dev,
const struct netdev_class *class_)
netdev_dev_assert_class(netdev_get_dev(netdev), netdev_class);
}
-/* A network device notifier.
- *
- * Network device implementations should use netdev_notifier_init() to
- * initialize this structure, but they may freely read its members after
- * initialization. */
-struct netdev_notifier {
- struct netdev *netdev;
- void (*cb)(struct netdev_notifier *);
- void *aux;
-};
-void netdev_notifier_init(struct netdev_notifier *, struct netdev *,
- void (*cb)(struct netdev_notifier *), void *aux);
-
/* Network device class structure, to be defined by each implementation of a
* network device.
*
void (*run)(void);
/* Arranges for poll_block() to wake up if the "run" member function needs
- * to be called. May be null if nothing is needed here. */
+ * to be called. Implementations are additionally required to wake
+ * whenever something changes in any of its netdevs which would cause their
+ * ->change_seq() function to change its result. May be null if nothing is
+ * needed here. */
void (*wait)(void);
/* Attempts to create a network device named 'name' with initial 'args' in
*/
int (*set_config)(struct netdev_dev *netdev_dev, const struct shash *args);
+ /* Returns true if 'args' is equivalent to the "args" field in
+ * 'netdev_dev', otherwise false.
+ *
+ * If no special processing needs to be done beyond a simple
+ * shash comparison, this may be a null pointer.
+ */
+ bool (*config_equal)(const struct netdev_dev *netdev_dev,
+ const struct shash *args);
+
/* Attempts to open a network device. On success, sets 'netdevp'
* to the new network device.
*
int (*update_flags)(struct netdev *netdev, enum netdev_flags off,
enum netdev_flags on, enum netdev_flags *old_flags);
- /* Arranges for 'cb' to be called whenever one of the attributes of
- * 'netdev' changes and sets '*notifierp' to a newly created
- * netdev_notifier that represents this arrangement. The created notifier
- * will have its 'netdev', 'cb', and 'aux' members set to the values of the
- * corresponding parameters. */
- int (*poll_add)(struct netdev *netdev,
- void (*cb)(struct netdev_notifier *notifier), void *aux,
- struct netdev_notifier **notifierp);
-
- /* Cancels poll notification for 'notifier'. */
- void (*poll_remove)(struct netdev_notifier *notifier);
+ /* Returns a sequence number which indicates changes in one of 'netdev''s
+ * properties. The returned sequence number must be nonzero so that
+ * callers have a value which they may use as a reset when tracking
+ * 'netdev'.
+ *
+ * Minimally, the returned sequence number is required to change whenever
+ * 'netdev''s flags, features, ethernet address, or carrier changes. The
+ * returned sequence number is allowed to change even when 'netdev' doesn't
+ * change, although implementations should try to avoid this. */
+ unsigned int (*change_seq)(const struct netdev *netdev);
};
int netdev_register_provider(const struct netdev_class *);