+/**
+ * struct discover_client_ops - Application supplied client info.
+ * @device_add: PB_PROTOCOL_ACTION_ADD event callback.
+ * @device_remove: PB_PROTOCOL_ACTION_REMOVE event callback.
+ * @cb_arg: Client managed convenience variable passed to callbacks.
+ *
+ * The discover client holds talloc references to the devices (and the
+ * devices' boot options), so callbacks may store boot options and devices
+ * as long as the client remains allocated.
+ *
+ * The boot_status and system_info structs are allocated by the client,
+ * and will be free()ed after the callback is invoked. If the callback
+ * stores these structures for usage beyond the duration of the callback,
+ * it must talloc_steal() them.
+ */
+
+struct discover_client_ops {
+ int (*device_add)(struct device *device, void *arg);
+ int (*boot_option_add)(struct device *dev, struct boot_option *option,
+ void *arg);
+ void (*device_remove)(struct device *device, void *arg);
+ void (*update_status)(struct boot_status *status, void *arg);
+ void (*update_sysinfo)(struct system_info *sysinfo, void *arg);
+ void (*update_config)(struct config *sysinfo, void *arg);
+ void *cb_arg;
+};