nl80211: Add set/get for frag/rts threshold and retry limits

Add new nl80211 attributes that can be used with NL80211_CMD_SET_WIPHY
and NL80211_CMD_GET_WIPHY to manage fragmentation/RTS threshold and
retry limits.

Since these values are stored in struct wiphy, remove the local copy
from mac80211 where feasible (frag & rts threshold). The retry limits
are currently needed in struct ieee80211_conf, but these could be
eventually removed since the driver should have access to the values
in struct wiphy.

Signed-off-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 14013dc64474..5e1c230744b5 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1298,6 +1298,32 @@ static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
         return ieee80211_ibss_leave(sdata);
 }
 
+static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
+{
+        struct ieee80211_local *local = wiphy_priv(wiphy);
+
+        if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
+                int err;
+
+                if (local->ops->set_rts_threshold) {
+                        err = local->ops->set_rts_threshold(
+                                local_to_hw(local), wiphy->rts_threshold);
+                        if (err)
+                                return err;
+                }
+        }
+
+        if (changed & WIPHY_PARAM_RETRY_SHORT)
+                local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
+        if (changed & WIPHY_PARAM_RETRY_LONG)
+                local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
+        if (changed &
+            (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
+                ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
+
+        return 0;
+}
+
 struct cfg80211_ops mac80211_config_ops = {
         .add_virtual_intf = ieee80211_add_iface,
         .del_virtual_intf = ieee80211_del_iface,
@@ -1336,4 +1362,5 @@ struct cfg80211_ops mac80211_config_ops = {
         .disassoc = ieee80211_disassoc,
         .join_ibss = ieee80211_join_ibss,
         .leave_ibss = ieee80211_leave_ibss,
+        .set_wiphy_params = ieee80211_set_wiphy_params,
 };