mirror of
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133 lines
4.0 KiB
Diff
133 lines
4.0 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Thu, 16 Feb 2023 11:07:30 +0100
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Subject: [PATCH] wifi: mac80211: use mesh header cache to speed up mesh
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forwarding
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Significantly reduces mesh forwarding path CPU usage and enables the
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direct use of iTXQ.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/net/mac80211/rx.c
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+++ b/net/mac80211/rx.c
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@@ -2720,6 +2720,65 @@ ieee80211_deliver_skb(struct ieee80211_r
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}
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}
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+#ifdef CPTCFG_MAC80211_MESH
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+static bool
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+ieee80211_rx_mesh_fast_forward(struct ieee80211_sub_if_data *sdata,
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+ struct sk_buff *skb, int hdrlen)
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+{
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+ struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
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+ struct ieee80211_mesh_fast_tx *entry = NULL;
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+ struct ieee80211s_hdr *mesh_hdr;
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+ struct tid_ampdu_tx *tid_tx;
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+ struct sta_info *sta;
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+ struct ethhdr eth;
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+ u8 tid;
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+
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+ mesh_hdr = (struct ieee80211s_hdr *)(skb->data + sizeof(eth));
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+ if ((mesh_hdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6)
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+ entry = mesh_fast_tx_get(sdata, mesh_hdr->eaddr1);
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+ else if (!(mesh_hdr->flags & MESH_FLAGS_AE))
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+ entry = mesh_fast_tx_get(sdata, skb->data);
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+ if (!entry)
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+ return false;
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+
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+ sta = rcu_dereference(entry->mpath->next_hop);
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+ if (!sta)
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+ return false;
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+
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+ if (skb_linearize(skb))
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+ return false;
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+
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+ tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
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+ tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
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+ if (tid_tx) {
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+ if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
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+ return false;
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+
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+ if (tid_tx->timeout)
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+ tid_tx->last_tx = jiffies;
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+ }
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+
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+ ieee80211_aggr_check(sdata, sta, skb);
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+
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+ if (ieee80211_get_8023_tunnel_proto(skb->data + hdrlen,
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+ &skb->protocol))
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+ hdrlen += ETH_ALEN;
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+ else
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+ skb->protocol = htons(skb->len - hdrlen);
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+ skb_set_network_header(skb, hdrlen + 2);
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+
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+ skb->dev = sdata->dev;
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+ memcpy(ð, skb->data, ETH_HLEN - 2);
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+ skb_pull(skb, 2);
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+ __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx,
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+ eth.h_dest, eth.h_source);
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+ IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast);
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+ IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
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+
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+ return true;
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+}
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+#endif
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+
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static ieee80211_rx_result
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ieee80211_rx_mesh_data(struct ieee80211_sub_if_data *sdata, struct sta_info *sta,
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struct sk_buff *skb)
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@@ -2824,6 +2883,10 @@ ieee80211_rx_mesh_data(struct ieee80211_
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skb_set_queue_mapping(skb, ieee802_1d_to_ac[skb->priority]);
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+ if (!multicast &&
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+ ieee80211_rx_mesh_fast_forward(sdata, skb, mesh_hdrlen))
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+ return RX_QUEUED;
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+
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ieee80211_fill_mesh_addresses(&hdr, &hdr.frame_control,
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eth->h_dest, eth->h_source);
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hdrlen = ieee80211_hdrlen(hdr.frame_control);
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@@ -2862,6 +2925,7 @@ ieee80211_rx_mesh_data(struct ieee80211_
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info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
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info->control.vif = &sdata->vif;
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info->control.jiffies = jiffies;
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+ fwd_skb->dev = sdata->dev;
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if (multicast) {
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IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast);
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memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
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@@ -2883,7 +2947,6 @@ ieee80211_rx_mesh_data(struct ieee80211_
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}
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IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
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- fwd_skb->dev = sdata->dev;
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ieee80211_add_pending_skb(local, fwd_skb);
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rx_accept:
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--- a/net/mac80211/ieee80211_i.h
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+++ b/net/mac80211/ieee80211_i.h
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@@ -2022,6 +2022,8 @@ void __ieee80211_xmit_fast(struct ieee80
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struct ieee80211_fast_tx *fast_tx,
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struct sk_buff *skb, bool ampdu,
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const u8 *da, const u8 *sa);
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+void ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
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+ struct sta_info *sta, struct sk_buff *skb);
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/* HT */
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void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
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--- a/net/mac80211/tx.c
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+++ b/net/mac80211/tx.c
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@@ -1191,10 +1191,8 @@ static bool ieee80211_tx_prep_agg(struct
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return queued;
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}
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-static void
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-ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
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- struct sta_info *sta,
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- struct sk_buff *skb)
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+void ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
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+ struct sta_info *sta, struct sk_buff *skb)
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{
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struct rate_control_ref *ref = sdata->local->rate_ctrl;
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u16 tid;
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