mac80211: add ieee80211_tx_status_ext

This allows the driver to pass in struct ieee80211_tx_status directly.
Make ieee80211_tx_status_noskb a wrapper around it.

As with ieee80211_tx_status_noskb, there is no _ni variant of this call,
because it probably won't be needed.

Even if the driver won't provide any extra status info other than what's
in struct ieee80211_tx_info already, it can optimize status reporting
this way by passing in the station pointer.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
[use C99 initializers]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index c9ba79a..807ee6c 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -4213,6 +4213,23 @@ void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
 void ieee80211_tx_status(struct ieee80211_hw *hw,
                         struct sk_buff *skb);
 
+/**
+ * ieee80211_tx_status_ext - extended transmit status callback
+ *
+ * This function can be used as a replacement for ieee80211_tx_status
+ * in drivers that may want to provide extra information that does not
+ * fit into &struct ieee80211_tx_info.
+ *
+ * Calls to this function for a single hardware must be synchronized
+ * against each other. Calls to this function, ieee80211_tx_status_ni()
+ * and ieee80211_tx_status_irqsafe() may not be mixed for a single hardware.
+ *
+ * @hw: the hardware the frame was transmitted by
+ * @status: tx status information
+ */
+void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
+                            struct ieee80211_tx_status *status);
+
 /**
  * ieee80211_tx_status_noskb - transmit status callback without skb
  *
@@ -4229,9 +4246,17 @@ void ieee80211_tx_status(struct ieee80211_hw *hw,
  *     (NULL for multicast packets)
  * @info: tx status information
  */
-void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
-                              struct ieee80211_sta *sta,
-                              struct ieee80211_tx_info *info);
+static inline void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
+                                            struct ieee80211_sta *sta,
+                                            struct ieee80211_tx_info *info)
+{
+       struct ieee80211_tx_status status = {
+               .sta = sta,
+               .info = info,
+       };
+
+       ieee80211_tx_status_ext(hw, &status);
+}
 
 /**
  * ieee80211_tx_status_ni - transmit status callback (in process context)

diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index 2b3f02f..be47ac5 100644 (file)
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -688,16 +688,16 @@ void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
        dev_kfree_skb(skb);
 }
 
-void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
+static void __ieee80211_tx_status(struct ieee80211_hw *hw,
+                                 struct ieee80211_tx_status *status)
 {
+       struct sk_buff *skb = status->skb;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
        struct ieee80211_local *local = hw_to_local(hw);
-       struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-       struct ieee80211_tx_status status = {};
+       struct ieee80211_tx_info *info = status->info;
+       struct sta_info *sta;
        __le16 fc;
        struct ieee80211_supported_band *sband;
-       struct rhlist_head *tmp;
-       struct sta_info *sta;
        int retry_count;
        int rates_idx;
        bool send_to_cooked;
@@ -708,16 +708,11 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 
        rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
 
-       rcu_read_lock();
-
        sband = local->hw.wiphy->bands[info->band];
        fc = hdr->frame_control;
 
-       for_each_sta_info(local, hdr->addr1, sta, tmp) {
-               /* skip wrong virtual interface */
-               if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
-                       continue;
-
+       if (status->sta) {
+               sta = container_of(status->sta, struct sta_info, sta);
                shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 
                if (info->flags & IEEE80211_TX_STATUS_EOSP)
@@ -737,7 +732,6 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
                         * that this TX packet failed because of that.
                         */
                        ieee80211_handle_filtered_frame(local, sta, skb);
-                       rcu_read_unlock();
                        return;
                }
 
@@ -787,7 +781,6 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 
                if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
                        ieee80211_handle_filtered_frame(local, sta, skb);
-                       rcu_read_unlock();
                        return;
                } else {
                        if (!acked)
@@ -803,10 +796,7 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
                        }
                }
 
-               status.sta = &sta->sta;
-               status.skb = skb;
-               status.info = info;
-               rate_control_tx_status(local, sband, &status);
+               rate_control_tx_status(local, sband, status);
                if (ieee80211_vif_is_mesh(&sta->sdata->vif))
                        ieee80211s_update_metric(local, sta, skb);
 
@@ -833,8 +823,6 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
                }
        }
 
-       rcu_read_unlock();
-
        ieee80211_led_tx(local);
 
        /* SNMP counters
@@ -899,18 +887,50 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
        /* send to monitor interfaces */
        ieee80211_tx_monitor(local, skb, sband, retry_count, shift, send_to_cooked);
 }
+
+void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+       struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+       struct ieee80211_local *local = hw_to_local(hw);
+       struct ieee80211_tx_status status = {
+               .skb = skb,
+               .info = IEEE80211_SKB_CB(skb),
+       };
+       struct rhlist_head *tmp;
+       struct sta_info *sta;
+
+       rcu_read_lock();
+
+       for_each_sta_info(local, hdr->addr1, sta, tmp) {
+               /* skip wrong virtual interface */
+               if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
+                       continue;
+
+               status.sta = &sta->sta;
+               break;
+       }
+
+       __ieee80211_tx_status(hw, &status);
+       rcu_read_unlock();
+}
 EXPORT_SYMBOL(ieee80211_tx_status);
 
-void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
-                              struct ieee80211_sta *pubsta,
-                              struct ieee80211_tx_info *info)
+void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
+                            struct ieee80211_tx_status *status)
 {
        struct ieee80211_local *local = hw_to_local(hw);
+       struct ieee80211_tx_info *info = status->info;
+       struct ieee80211_sta *pubsta = status->sta;
        struct ieee80211_supported_band *sband;
-       struct ieee80211_tx_status status = {};
        int retry_count;
        bool acked, noack_success;
 
+       if (status->skb)
+               return __ieee80211_tx_status(hw, status);
+
+       if (!status->sta)
+               return;
+
        ieee80211_tx_get_rates(hw, info, &retry_count);
 
        sband = hw->wiphy->bands[info->band];
@@ -940,9 +960,7 @@ void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
                        ieee80211_lost_packet(sta, info);
                }
 
-               status.sta = pubsta;
-               status.info = info;
-               rate_control_tx_status(local, sband, &status);
+               rate_control_tx_status(local, sband, status);
        }
 
        if (acked || noack_success) {
@@ -957,7 +975,7 @@ void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
                I802_DEBUG_INC(local->dot11FailedCount);
        }
 }
-EXPORT_SYMBOL(ieee80211_tx_status_noskb);
+EXPORT_SYMBOL(ieee80211_tx_status_ext);
 
 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
 {