mac80211: dont use interface indices in drivers
This patch gets rid of the if_id stuff where possible in favour of
a new per-virtual-interface structure "struct ieee80211_vif". This
structure is located at the end of the per-interface structure and
contains a variable length driver-use data area.
This has two advantages:
* removes the need to look up interfaces by if_id, this is better
for working with network namespaces and performance
* allows drivers to store and retrieve per-interface data without
having to allocate own lists/hash tables
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index b898b31..c551a7f 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -387,8 +387,16 @@
struct dentry *default_key;
} debugfs;
#endif
+ /* must be last, dynamically sized area in this! */
+ struct ieee80211_vif vif;
};
+static inline
+struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
+{
+ return container_of(p, struct ieee80211_sub_if_data, vif);
+}
+
#define IEEE80211_DEV_TO_SUB_IF(dev) netdev_priv(dev)
enum {