From 0cbf348a9a790d5dfbfa1b5b463f09507e7594fc Mon Sep 17 00:00:00 2001 From: Andrei Otcheretianski Date: Wed, 22 Jun 2022 16:15:56 +0300 Subject: [PATCH] wifi: mac80211: Support multi link in ieee80211_recalc_min_chandef() Recalculate min channel context for the given or all interface links, depending on the caller. For a station state change, we need to recalculate all of them since we don't know which link (or multiple) it might be on. Signed-off-by: Andrei Otcheretianski Signed-off-by: Johannes Berg --- net/mac80211/ieee80211_i.h | 3 ++- net/mac80211/sta_info.c | 6 +++--- net/mac80211/util.c | 40 +++++++++++++++++++++++++++++++++------- net/mac80211/vht.c | 2 +- 4 files changed, 39 insertions(+), 12 deletions(-) diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 163e62d..877f244 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -2335,7 +2335,8 @@ int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata, enum ieee80211_smps_mode smps_mode); void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata, struct ieee80211_link_data *link); -void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata); +void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata, + int link_id); size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset); u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 88ff61a..f52a7fa 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -780,7 +780,7 @@ static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) * change, this enables driver using the updated channel context right away. */ if (sta->sta_state >= IEEE80211_STA_ASSOC) { - ieee80211_recalc_min_chandef(sta->sdata); + ieee80211_recalc_min_chandef(sta->sdata, -1); if (!sta->sta.support_p2p_ps) ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); } @@ -2136,7 +2136,7 @@ int sta_info_move_state(struct sta_info *sta, set_bit(WLAN_STA_AUTH, &sta->_flags); } else if (sta->sta_state == IEEE80211_STA_ASSOC) { clear_bit(WLAN_STA_ASSOC, &sta->_flags); - ieee80211_recalc_min_chandef(sta->sdata); + ieee80211_recalc_min_chandef(sta->sdata, -1); if (!sta->sta.support_p2p_ps) ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); } @@ -2145,7 +2145,7 @@ int sta_info_move_state(struct sta_info *sta, if (sta->sta_state == IEEE80211_STA_AUTH) { set_bit(WLAN_STA_ASSOC, &sta->_flags); sta->assoc_at = ktime_get_boottime_ns(); - ieee80211_recalc_min_chandef(sta->sdata); + ieee80211_recalc_min_chandef(sta->sdata, -1); if (!sta->sta.support_p2p_ps) ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 2ff8d1e..739c05f 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -2839,22 +2839,48 @@ void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata, mutex_unlock(&local->chanctx_mtx); } -void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) +void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata, + int link_id) { struct ieee80211_local *local = sdata->local; struct ieee80211_chanctx_conf *chanctx_conf; struct ieee80211_chanctx *chanctx; + int i; mutex_lock(&local->chanctx_mtx); - chanctx_conf = rcu_dereference_protected(sdata->vif.bss_conf.chanctx_conf, - lockdep_is_held(&local->chanctx_mtx)); + for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) { + struct ieee80211_bss_conf *bss_conf; - if (WARN_ON_ONCE(!chanctx_conf)) - goto unlock; + if (link_id >= 0 && link_id != i) + continue; - chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); - ieee80211_recalc_chanctx_min_def(local, chanctx); + rcu_read_lock(); + bss_conf = rcu_dereference(sdata->vif.link_conf[i]); + if (!bss_conf) { + rcu_read_unlock(); + continue; + } + + chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf, + lockdep_is_held(&local->chanctx_mtx)); + /* + * Since we hold the chanctx_mtx (checked above) + * we can take the chanctx_conf pointer out of the + * RCU critical section, it cannot go away without + * the mutex. Just the way we reached it could - in + * theory - go away, but we don't really care and + * it really shouldn't happen anyway. + */ + rcu_read_unlock(); + + if (WARN_ON_ONCE(!chanctx_conf)) + goto unlock; + + chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, + conf); + ieee80211_recalc_chanctx_min_def(local, chanctx); + } unlock: mutex_unlock(&local->chanctx_mtx); } diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c index c804890..b2b09d4 100644 --- a/net/mac80211/vht.c +++ b/net/mac80211/vht.c @@ -731,7 +731,7 @@ void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, opmode, band); if (changed > 0) { - ieee80211_recalc_min_chandef(sdata); + ieee80211_recalc_min_chandef(sdata, link_sta->link_id); rate_control_rate_update(local, sband, link_sta->sta, link_sta->link_id, changed); } -- 2.7.4