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72 lines
2.8 KiB
Diff
72 lines
2.8 KiB
Diff
From: Johannes Berg <johannes.berg@intel.com>
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Date: Fri, 20 Mar 2015 16:24:21 +0100
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Subject: [PATCH] mac80211: don't look up destination station twice
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There's no need to look up the destination station twice while
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building the 802.11 header for a given frame if the frame will
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actually be transmitted to the station we initially looked up.
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This happens for 4-addr VLAN interfaces and TDLS connections, which
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both directly send the frame to the station they looked up, though
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in the case of TDLS some station conditions need to be checked.
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To avoid that, add a variable indicating that we've looked up the
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station that the frame is going to be transmitted to, and avoid the
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lookup/flag checking if it already has been done.
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In the TDLS case, also move the authorized/wme_sta flag assignment
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to the correct place, i.e. only when that station is really used.
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Before this change, the new lookup should always have succeeded so
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that the potentially erroneous data would be overwritten.
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Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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---
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--- a/net/mac80211/tx.c
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+++ b/net/mac80211/tx.c
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@@ -1894,6 +1894,7 @@ static struct sk_buff *ieee80211_build_h
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bool wme_sta = false, authorized = false, tdls_auth = false;
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bool tdls_peer = false, tdls_setup_frame = false;
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bool multicast;
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+ bool have_station = false;
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u16 info_id = 0;
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struct ieee80211_chanctx_conf *chanctx_conf;
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struct ieee80211_sub_if_data *ap_sdata;
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@@ -1918,6 +1919,7 @@ static struct sk_buff *ieee80211_build_h
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hdrlen = 30;
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authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
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wme_sta = sta->sta.wme;
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+ have_station = true;
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}
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ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
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u.ap);
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@@ -2034,9 +2036,6 @@ static struct sk_buff *ieee80211_build_h
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if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
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sta = sta_info_get(sdata, skb->data);
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if (sta) {
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- authorized = test_sta_flag(sta,
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- WLAN_STA_AUTHORIZED);
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- wme_sta = sta->sta.wme;
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tdls_peer = test_sta_flag(sta,
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WLAN_STA_TDLS_PEER);
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tdls_auth = test_sta_flag(sta,
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@@ -2068,6 +2067,9 @@ static struct sk_buff *ieee80211_build_h
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memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
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memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
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hdrlen = 24;
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+ have_station = true;
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+ authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
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+ wme_sta = sta->sta.wme;
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} else if (sdata->u.mgd.use_4addr &&
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cpu_to_be16(ethertype) != sdata->control_port_protocol) {
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fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
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@@ -2130,7 +2132,7 @@ static struct sk_buff *ieee80211_build_h
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* in AP mode)
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*/
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multicast = is_multicast_ether_addr(hdr.addr1);
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- if (!multicast) {
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+ if (!multicast && !have_station) {
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sta = sta_info_get(sdata, hdr.addr1);
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if (sta) {
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authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
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