From 85977fc0aa489420709779cbc859966db94be68f Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 28 Feb 2024 09:55:47 +0100 Subject: [PATCH] wifi: mac80211: remove TDLS peers only on affected link If a link does CSA, or if it changes SMPS mode, we need to drop the TDLS peers, but we really should drop them only on the affected link. Fix that. Reviewed-by: Miriam Rachel Korenblit Reviewed-by: Emmanuel Grumbach Link: https://msgid.link/20240228095719.00d1d793f5b8.Ia9971316c6b3922dd371d64ac2198f91ed5ad9d2@changeid Signed-off-by: Johannes Berg --- net/mac80211/cfg.c | 2 +- net/mac80211/ieee80211_i.h | 2 +- net/mac80211/mlme.c | 7 ++++--- net/mac80211/tdls.c | 6 +++++- 4 files changed, 11 insertions(+), 6 deletions(-) diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 3a9d2ceec752..f03452dc716d 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -3242,7 +3242,7 @@ int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata, if (err) link->u.mgd.req_smps = old_req; else if (smps_mode != IEEE80211_SMPS_OFF && tdls_peer_found) - ieee80211_teardown_tdls_peers(sdata); + ieee80211_teardown_tdls_peers(link); return err; } diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index cfd0c03e4bd6..b6fead612b66 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -2611,7 +2611,7 @@ int ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev, void ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy, struct net_device *dev, const u8 *addr); -void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata); +void ieee80211_teardown_tdls_peers(struct ieee80211_link_data *link); void ieee80211_tdls_handle_disconnect(struct ieee80211_sub_if_data *sdata, const u8 *peer, u16 reason); void diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 2180b1ba0e42..47a2cba8313f 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -2115,12 +2115,13 @@ ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, } /* - * Drop all TDLS peers - either we disconnect or move to a different - * channel from this point on. There's no telling what our peer will do. + * Drop all TDLS peers on the affected link - either we disconnect or + * move to a different channel from this point on. There's no telling + * what our peer will do. * The TDLS WIDER_BW scenario is also problematic, as peers might now * have an incompatible wider chandef. */ - ieee80211_teardown_tdls_peers(sdata); + ieee80211_teardown_tdls_peers(link); conf = rcu_dereference_protected(link->conf->chanctx_conf, lockdep_is_held(&local->hw.wiphy->mtx)); diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c index 42d9c06cbb84..f07b40916485 100644 --- a/net/mac80211/tdls.c +++ b/net/mac80211/tdls.c @@ -2028,8 +2028,9 @@ ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata, } } -void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata) +void ieee80211_teardown_tdls_peers(struct ieee80211_link_data *link) { + struct ieee80211_sub_if_data *sdata = link->sdata; struct sta_info *sta; u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED; @@ -2039,6 +2040,9 @@ void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata) !test_sta_flag(sta, WLAN_STA_AUTHORIZED)) continue; + if (sta->deflink.link_id != link->link_id) + continue; + ieee80211_tdls_oper_request(&sdata->vif, sta->sta.addr, NL80211_TDLS_TEARDOWN, reason, GFP_ATOMIC);