Subject: [PATCH] wifi: mac80211: use mesh header cache to speed up mesh
forwarding
-Use it to look up the next hop address + sta pointer + key and call
-__ieee80211_mesh_xmit_fast to queue the tx frame.
-
Significantly reduces mesh forwarding path CPU usage and enables the
-use of iTXQ.
+direct use of iTXQ.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
-@@ -2731,6 +2731,7 @@ ieee80211_rx_mesh_data(struct ieee80211_
- struct ieee80211_hdr hdr = {
- .frame_control = cpu_to_le16(fc)
- };
-+ struct mhdr_cache_entry *entry = NULL;
- struct ieee80211_hdr *fwd_hdr;
- struct ieee80211s_hdr *mesh_hdr;
- struct ieee80211_tx_info *info;
-@@ -2788,7 +2789,12 @@ ieee80211_rx_mesh_data(struct ieee80211_
- return RX_DROP_MONITOR;
+@@ -2720,6 +2720,65 @@ ieee80211_deliver_skb(struct ieee80211_r
}
+ }
-- if (mesh_hdr->flags & MESH_FLAGS_AE) {
++#ifdef CPTCFG_MAC80211_MESH
++static bool
++ieee80211_rx_mesh_fast_forward(struct ieee80211_sub_if_data *sdata,
++ struct sk_buff *skb, int hdrlen)
++{
++ struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
++ struct ieee80211_mesh_fast_tx *entry = NULL;
++ struct ieee80211s_hdr *mesh_hdr;
++ struct tid_ampdu_tx *tid_tx;
++ struct sta_info *sta;
++ struct ethhdr eth;
++ u8 tid;
++
++ mesh_hdr = (struct ieee80211s_hdr *)(skb->data + sizeof(eth));
+ if ((mesh_hdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6)
-+ entry = mesh_get_cached_hdr(sdata, mesh_hdr->eaddr1);
++ entry = mesh_fast_tx_get(sdata, mesh_hdr->eaddr1);
+ else if (!(mesh_hdr->flags & MESH_FLAGS_AE))
-+ entry = mesh_get_cached_hdr(sdata, eth->h_dest);
++ entry = mesh_fast_tx_get(sdata, skb->data);
++ if (!entry)
++ return false;
++
++ sta = rcu_dereference(entry->mpath->next_hop);
++ if (!sta)
++ return false;
++
++ if (skb_linearize(skb))
++ return false;
++
++ tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
++ tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
++ if (tid_tx) {
++ if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
++ return false;
++
++ if (tid_tx->timeout)
++ tid_tx->last_tx = jiffies;
++ }
++
++ ieee80211_aggr_check(sdata, sta, skb);
++
++ if (ieee80211_get_8023_tunnel_proto(skb->data + hdrlen,
++ &skb->protocol))
++ hdrlen += ETH_ALEN;
++ else
++ skb->protocol = htons(skb->len - hdrlen);
++ skb_set_network_header(skb, hdrlen + 2);
++
++ skb->dev = sdata->dev;
++ memcpy(ð, skb->data, ETH_HLEN - 2);
++ skb_pull(skb, 2);
++ __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx,
++ eth.h_dest, eth.h_source);
++ IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast);
++ IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
+
-+ if (!entry && (mesh_hdr->flags & MESH_FLAGS_AE)) {
- struct mesh_path *mppath;
- char *proxied_addr;
- bool update = false;
-@@ -2862,11 +2868,23 @@ ieee80211_rx_mesh_data(struct ieee80211_
++ return true;
++}
++#endif
++
+ static ieee80211_rx_result
+ ieee80211_rx_mesh_data(struct ieee80211_sub_if_data *sdata, struct sta_info *sta,
+ struct sk_buff *skb)
+@@ -2824,6 +2883,10 @@ ieee80211_rx_mesh_data(struct ieee80211_
+
+ skb_set_queue_mapping(skb, ieee802_1d_to_ac[skb->priority]);
+
++ if (!multicast &&
++ ieee80211_rx_mesh_fast_forward(sdata, skb, mesh_hdrlen))
++ return RX_QUEUED;
++
+ ieee80211_fill_mesh_addresses(&hdr, &hdr.frame_control,
+ eth->h_dest, eth->h_source);
+ hdrlen = ieee80211_hdrlen(hdr.frame_control);
+@@ -2862,6 +2925,7 @@ ieee80211_rx_mesh_data(struct ieee80211_
info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
info->control.vif = &sdata->vif;
info->control.jiffies = jiffies;
if (multicast) {
IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast);
memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
- /* update power mode indication when forwarding */
- ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr);
-+ } else if (entry) {
-+ struct ieee80211_hdr *ehdr = (struct ieee80211_hdr *)entry->hdr;
-+
-+ ether_addr_copy(fwd_hdr->addr1, ehdr->addr1);
-+ ether_addr_copy(fwd_hdr->addr2, sdata->vif.addr);
-+ IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast);
-+ IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
-+ qos[0] = fwd_skb->priority;
-+ qos[1] = ieee80211_get_qos_ctl(ehdr)[1];
-+ __ieee80211_mesh_xmit_fast(sdata, entry, fwd_skb);
-+ return RX_QUEUED;
- } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) {
- /* mesh power mode flags updated in mesh_nexthop_lookup */
- IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast);
-@@ -2883,7 +2901,6 @@ ieee80211_rx_mesh_data(struct ieee80211_
+@@ -2883,7 +2947,6 @@ ieee80211_rx_mesh_data(struct ieee80211_
}
IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
ieee80211_add_pending_skb(local, fwd_skb);
rx_accept:
+--- a/net/mac80211/ieee80211_i.h
++++ b/net/mac80211/ieee80211_i.h
+@@ -2022,6 +2022,8 @@ void __ieee80211_xmit_fast(struct ieee80
+ struct ieee80211_fast_tx *fast_tx,
+ struct sk_buff *skb, bool ampdu,
+ const u8 *da, const u8 *sa);
++void ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
++ struct sta_info *sta, struct sk_buff *skb);
+
+ /* HT */
+ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
+--- a/net/mac80211/tx.c
++++ b/net/mac80211/tx.c
+@@ -1191,10 +1191,8 @@ static bool ieee80211_tx_prep_agg(struct
+ return queued;
+ }
+
+-static void
+-ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
+- struct sta_info *sta,
+- struct sk_buff *skb)
++void ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
++ struct sta_info *sta, struct sk_buff *skb)
+ {
+ struct rate_control_ref *ref = sdata->local->rate_ctrl;
+ u16 tid;
projects / openwrt / staging / dedeckeh.git / blobdiff