batman-adv: Adding 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 <lindner_marek@yahoo.de>

1 files changed, 43 insertions, 0 deletions

diff --git a/net/batman-adv/bat_sysfs.c b/net/batman-adv/bat_sysfs.c
index 913299d03f4a..5bc7b66d32dc 100644
--- a/net/batman-adv/bat_sysfs.c
+++ b/net/batman-adv/bat_sysfs.c
@@ -117,6 +117,49 @@ ssize_t show_##_name(struct kobject *kobj,				\
         static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
 
 
+#define BAT_ATTR_HIF_STORE_UINT(_name, _min, _max, _post_func)          \
+ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,     \
+                      char *buff, size_t count)                         \
+{                                                                       \
+        struct net_device *net_dev = kobj_to_netdev(kobj);              \
+        struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);  \
+        ssize_t length;                                                 \
+                                                                        \
+        if (!hard_iface)                                                \
+                return 0;                                               \
+                                                                        \
+        length = __store_uint_attr(buff, count, _min, _max, _post_func, \
+                                   attr, &hard_iface->_name, net_dev);  \
+                                                                        \
+        hardif_free_ref(hard_iface);                                    \
+        return length;                                                  \
+}
+
+#define BAT_ATTR_HIF_SHOW_UINT(_name)                                   \
+ssize_t show_##_name(struct kobject *kobj,                              \
+                     struct attribute *attr, char *buff)                \
+{                                                                       \
+        struct net_device *net_dev = kobj_to_netdev(kobj);              \
+        struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);  \
+        ssize_t length;                                                 \
+                                                                        \
+        if (!hard_iface)                                                \
+                return 0;                                               \
+                                                                        \
+        length = sprintf(buff, "%i\n", atomic_read(&hard_iface->_name));\
+                                                                        \
+        hardif_free_ref(hard_iface);                                    \
+        return length;                                                  \
+}
+
+/* Use this, if you are going to set [name] in hard_iface to an
+ * unsigned integer value*/
+#define BAT_ATTR_HIF_UINT(_name, _mode, _min, _max, _post_func)         \
+        static BAT_ATTR_HIF_STORE_UINT(_name, _min, _max, _post_func)   \
+        static BAT_ATTR_HIF_SHOW_UINT(_name)                            \
+        static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
+
+
 static int store_bool_attr(char *buff, size_t count,
                            struct net_device *net_dev,
                            const char *attr_name, atomic_t *attr)