batman-adv: Add hard_iface specific sysfs wrapper macros for UINT

This allows us to easily add a sysfs parameter for an
unsigned int later, which is not for a batman mesh interface
(e.g. bat0), but for a common interface instead. It allows
reading and writing an atomic_t in hard_iface (instead of
bat_priv compared to the mesh variant).

Developed by Linus during a 6 months trainee study period in
Ascom (Switzerland) AG.

Signed-off-by: Linus Luessing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
[antonio@open-mesh.com: rename functions and move macros]
Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>

diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c
index 4d70d44..d3f69d5 100644 (file)
--- a/net/batman-adv/sysfs.c
+++ b/net/batman-adv/sysfs.c
@@ -242,6 +242,55 @@ ssize_t batadv_show_vlan_##_name(struct kobject *kobj,                     \
        static BATADV_ATTR_VLAN(_name, _mode, batadv_show_vlan_##_name, \
                                batadv_store_vlan_##_name)
 
+#define BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min, _max, _post_func)        \
+ssize_t batadv_store_##_name(struct kobject *kobj,                     \
+                            struct attribute *attr, char *buff,        \
+                            size_t count)                              \
+{                                                                      \
+       struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
+       struct batadv_hard_iface *hard_iface;                           \
+       ssize_t length;                                                 \
+                                                                       \
+       hard_iface = batadv_hardif_get_by_netdev(net_dev);              \
+       if (!hard_iface)                                                \
+               return 0;                                               \
+                                                                       \
+       length = __batadv_store_uint_attr(buff, count, _min, _max,      \
+                                         _post_func, attr,             \
+                                         &hard_iface->_var, net_dev);  \
+                                                                       \
+       batadv_hardif_put(hard_iface);                          \
+       return length;                                                  \
+}
+
+#define BATADV_ATTR_HIF_SHOW_UINT(_name, _var)                         \
+ssize_t batadv_show_##_name(struct kobject *kobj,                      \
+                           struct attribute *attr, char *buff)         \
+{                                                                      \
+       struct net_device *net_dev = batadv_kobj_to_netdev(kobj);       \
+       struct batadv_hard_iface *hard_iface;                           \
+       ssize_t length;                                                 \
+                                                                       \
+       hard_iface = batadv_hardif_get_by_netdev(net_dev);              \
+       if (!hard_iface)                                                \
+               return 0;                                               \
+                                                                       \
+       length = sprintf(buff, "%i\n", atomic_read(&hard_iface->_var)); \
+                                                                       \
+       batadv_hardif_put(hard_iface);                          \
+       return length;                                                  \
+}
+
+/* Use this, if you are going to set [name] in hard_iface to an
+ * unsigned integer value
+ */
+#define BATADV_ATTR_HIF_UINT(_name, _var, _mode, _min, _max, _post_func)\
+       static BATADV_ATTR_HIF_STORE_UINT(_name, _var, _min,            \
+                                         _max, _post_func)             \
+       static BATADV_ATTR_HIF_SHOW_UINT(_name, _var)                   \
+       static BATADV_ATTR(_name, _mode, batadv_show_##_name,           \
+                          batadv_store_##_name)
+
 static int batadv_store_bool_attr(char *buff, size_t count,
                                  struct net_device *net_dev,
                                  const char *attr_name, atomic_t *attr,