package/kernel/mac80211/patches/subsys/320-wifi-mac80211-use-mesh-header-cache-to-speed-up-mesh.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Thu, 16 Feb 2023 11:07:30 +0100
   3 Subject: [PATCH] wifi: mac80211: use mesh header cache to speed up mesh
   4  forwarding
   5
   6 Use it to look up the next hop address + sta pointer + key and call
   7 __ieee80211_mesh_xmit_fast to queue the tx frame.
   8
   9 Significantly reduces mesh forwarding path CPU usage and enables the
  10 use of iTXQ.
  11
  12 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  13 ---
  14
  15 --- a/net/mac80211/rx.c
  16 +++ b/net/mac80211/rx.c
  17 @@ -2731,6 +2731,7 @@ ieee80211_rx_mesh_data(struct ieee80211_
  18         struct ieee80211_hdr hdr = {
  19                 .frame_control = cpu_to_le16(fc)
  20         };
  21 +       struct mhdr_cache_entry *entry = NULL;
  22         struct ieee80211_hdr *fwd_hdr;
  23         struct ieee80211s_hdr *mesh_hdr;
  24         struct ieee80211_tx_info *info;
  25 @@ -2788,7 +2789,12 @@ ieee80211_rx_mesh_data(struct ieee80211_
  26                 return RX_DROP_MONITOR;
  27         }
  28
  29 -       if (mesh_hdr->flags & MESH_FLAGS_AE) {
  30 +       if ((mesh_hdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6)
  31 +               entry = mesh_get_cached_hdr(sdata, mesh_hdr->eaddr1);
  32 +       else if (!(mesh_hdr->flags & MESH_FLAGS_AE))
  33 +               entry = mesh_get_cached_hdr(sdata, eth->h_dest);
  34 +
  35 +       if (!entry && (mesh_hdr->flags & MESH_FLAGS_AE)) {
  36                 struct mesh_path *mppath;
  37                 char *proxied_addr;
  38                 bool update = false;
  39 @@ -2862,11 +2868,23 @@ ieee80211_rx_mesh_data(struct ieee80211_
  40         info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
  41         info->control.vif = &sdata->vif;
  42         info->control.jiffies = jiffies;
  43 +       fwd_skb->dev = sdata->dev;
  44         if (multicast) {
  45                 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast);
  46                 memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
  47                 /* update power mode indication when forwarding */
  48                 ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr);
  49 +       } else if (entry) {
  50 +               struct ieee80211_hdr *ehdr = (struct ieee80211_hdr *)entry->hdr;
  51 +
  52 +               ether_addr_copy(fwd_hdr->addr1, ehdr->addr1);
  53 +               ether_addr_copy(fwd_hdr->addr2, sdata->vif.addr);
  54 +               IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast);
  55 +               IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
  56 +               qos[0] = fwd_skb->priority;
  57 +               qos[1] = ieee80211_get_qos_ctl(ehdr)[1];
  58 +               __ieee80211_mesh_xmit_fast(sdata, entry, fwd_skb);
  59 +               return RX_QUEUED;
  60         } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) {
  61                 /* mesh power mode flags updated in mesh_nexthop_lookup */
  62                 IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast);
  63 @@ -2883,7 +2901,6 @@ ieee80211_rx_mesh_data(struct ieee80211_
  64         }
  65
  66         IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
  67 -       fwd_skb->dev = sdata->dev;
  68         ieee80211_add_pending_skb(local, fwd_skb);
  69
  70  rx_accept: