package/kernel/mac80211/patches/subsys/306-mac80211-move-store-skb-ack-code-to-its-own-function.patch

   1 From: John Crispin <john@phrozen.org>
   2 Date: Tue, 29 Oct 2019 10:13:02 +0100
   3 Subject: [PATCH] mac80211: move store skb ack code to its own function
   4
   5 This patch moves the code handling SKBTX_WIFI_STATUS inside the TX path
   6 into an extra function. This allows us to reuse it inside the 802.11 encap
   7 offloading datapath.
   8
   9 Signed-off-by: John Crispin <john@phrozen.org>
  10 Link: https://lore.kernel.org/r/20191029091304.7330-2-john@phrozen.org
  11 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  12 ---
  13
  14 --- a/net/mac80211/tx.c
  15 +++ b/net/mac80211/tx.c
  16 @@ -2445,6 +2445,33 @@ static int ieee80211_lookup_ra_sta(struc
  17         return 0;
  18  }
  19
  20 +static int ieee80211_store_ack_skb(struct ieee80211_local *local,
  21 +                                  struct sk_buff *skb,
  22 +                                  u32 *info_flags)
  23 +{
  24 +       struct sk_buff *ack_skb = skb_clone_sk(skb);
  25 +       u16 info_id = 0;
  26 +
  27 +       if (ack_skb) {
  28 +               unsigned long flags;
  29 +               int id;
  30 +
  31 +               spin_lock_irqsave(&local->ack_status_lock, flags);
  32 +               id = idr_alloc(&local->ack_status_frames, ack_skb,
  33 +                              1, 0x10000, GFP_ATOMIC);
  34 +               spin_unlock_irqrestore(&local->ack_status_lock, flags);
  35 +
  36 +               if (id >= 0) {
  37 +                       info_id = id;
  38 +                       *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
  39 +               } else {
  40 +                       kfree_skb(ack_skb);
  41 +               }
  42 +       }
  43 +
  44 +       return info_id;
  45 +}
  46 +
  47  /**
  48   * ieee80211_build_hdr - build 802.11 header in the given frame
  49   * @sdata: virtual interface to build the header for
  50 @@ -2738,26 +2765,8 @@ static struct sk_buff *ieee80211_build_h
  51         }
  52
  53         if (unlikely(!multicast && skb->sk &&
  54 -                    skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
  55 -               struct sk_buff *ack_skb = skb_clone_sk(skb);
  56 -
  57 -               if (ack_skb) {
  58 -                       unsigned long flags;
  59 -                       int id;
  60 -
  61 -                       spin_lock_irqsave(&local->ack_status_lock, flags);
  62 -                       id = idr_alloc(&local->ack_status_frames, ack_skb,
  63 -                                      1, 0x10000, GFP_ATOMIC);
  64 -                       spin_unlock_irqrestore(&local->ack_status_lock, flags);
  65 -
  66 -                       if (id >= 0) {
  67 -                               info_id = id;
  68 -                               info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
  69 -                       } else {
  70 -                               kfree_skb(ack_skb);
  71 -                       }
  72 -               }
  73 -       }
  74 +                    skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS))
  75 +               info_id = ieee80211_store_ack_skb(local, skb, &info_flags);
  76
  77         /*
  78          * If the skb is shared we need to obtain our own copy.