mac80211: Add NoAck per tid support

This patch contains the processing changes in mac80211.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 22 insertions, 1 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 2577c45069e..f947ac6bb67 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -102,6 +102,16 @@ static int ieee80211_change_iface(struct wiphy *wiphy,
         return 0;
 }
 
+static int ieee80211_set_noack_map(struct wiphy *wiphy,
+                                  struct net_device *dev,
+                                  u16 noack_map)
+{
+        struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+        sdata->noack_map = noack_map;
+        return 0;
+}
+
 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
                              u8 key_idx, bool pairwise, const u8 *mac_addr,
                              struct key_params *params)
@@ -2698,4 +2708,5 @@ struct cfg80211_ops mac80211_config_ops = {
         .tdls_mgmt = ieee80211_tdls_mgmt,
         .probe_client = ieee80211_probe_client,
         .get_channel = ieee80211_wiphy_get_channel,
+        .set_noack_map = ieee80211_set_noack_map,
 };
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index b1aa2e172d1..7a757a97ba3 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -611,6 +611,9 @@ struct ieee80211_sub_if_data {
         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
         unsigned int fragment_next;
 
+        /* TID bitmap for NoAck policy */
+        u16 noack_map;
+
         struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
         struct ieee80211_key __rcu *default_unicast_key;
         struct ieee80211_key __rcu *default_multicast_key;
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index b34ca0cbdf6..be1d61e76e9 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -866,6 +866,8 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
         sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
         sdata->control_port_no_encrypt = false;
 
+        sdata->noack_map = 0;
+
         /* only monitor differs */
         sdata->dev->type = ARPHRD_ETHER;
 
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
index 74b3d100844..a98f24ac936 100644
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -139,6 +139,7 @@ void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
                            struct sk_buff *skb)
 {
         struct ieee80211_hdr *hdr = (void *)skb->data;
+        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 
         /* Fill in the QoS header if there is one. */
         if (ieee80211_is_data_qos(hdr->frame_control)) {
@@ -150,8 +151,12 @@ void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
                 /* preserve EOSP bit */
                 ack_policy = *p & IEEE80211_QOS_CTL_EOSP;
 
-                if (is_multicast_ether_addr(hdr->addr1))
+                if (is_multicast_ether_addr(hdr->addr1) ||
+                    sdata->noack_map & BIT(tid)) {
                         ack_policy |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK;
+                        info->flags |= IEEE80211_TX_CTL_NO_ACK;
+                }
+
                 /* qos header is 2 bytes */
                 *p++ = ack_policy | tid;
                 *p = ieee80211_vif_is_mesh(&sdata->vif) ?