diff options
Diffstat (limited to 'net/mac80211/link.c')
-rw-r--r-- | net/mac80211/link.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/net/mac80211/link.c b/net/mac80211/link.c index 8df348a5edce..e309708abae8 100644 --- a/net/mac80211/link.c +++ b/net/mac80211/link.c @@ -9,6 +9,7 @@ #include <net/mac80211.h> #include "ieee80211_i.h" #include "driver-ops.h" +#include "key.h" void ieee80211_link_setup(struct ieee80211_link_data *link) { @@ -300,3 +301,173 @@ void ieee80211_vif_clear_links(struct ieee80211_sub_if_data *sdata) ieee80211_free_links(sdata, links); } + +static int _ieee80211_set_active_links(struct ieee80211_sub_if_data *sdata, + u16 active_links) +{ + struct ieee80211_bss_conf *link_confs[IEEE80211_MLD_MAX_NUM_LINKS]; + struct ieee80211_local *local = sdata->local; + u16 old_active = sdata->vif.active_links; + unsigned long rem = old_active & ~active_links; + unsigned long add = active_links & ~old_active; + struct sta_info *sta; + unsigned int link_id; + int ret, i; + + if (!ieee80211_sdata_running(sdata)) + return -ENETDOWN; + + if (sdata->vif.type != NL80211_IFTYPE_STATION) + return -EINVAL; + + /* cannot activate links that don't exist */ + if (active_links & ~sdata->vif.valid_links) + return -EINVAL; + + /* nothing to do */ + if (old_active == active_links) + return 0; + + for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) + link_confs[i] = sdata_dereference(sdata->vif.link_conf[i], + sdata); + + if (add) { + sdata->vif.active_links |= active_links; + ret = drv_change_vif_links(local, sdata, + old_active, + sdata->vif.active_links, + link_confs); + if (ret) { + sdata->vif.active_links = old_active; + return ret; + } + } + + for_each_set_bit(link_id, &rem, IEEE80211_MLD_MAX_NUM_LINKS) { + struct ieee80211_link_data *link; + + link = sdata_dereference(sdata->link[link_id], sdata); + + /* FIXME: kill TDLS connections on the link */ + + ieee80211_link_release_channel(link); + } + + list_for_each_entry(sta, &local->sta_list, list) { + if (sdata != sta->sdata) + continue; + ret = drv_change_sta_links(local, sdata, &sta->sta, + old_active, + old_active | active_links); + WARN_ON_ONCE(ret); + } + + ret = ieee80211_key_switch_links(sdata, rem, add); + WARN_ON_ONCE(ret); + + list_for_each_entry(sta, &local->sta_list, list) { + if (sdata != sta->sdata) + continue; + ret = drv_change_sta_links(local, sdata, &sta->sta, + old_active | active_links, + active_links); + WARN_ON_ONCE(ret); + } + + for_each_set_bit(link_id, &add, IEEE80211_MLD_MAX_NUM_LINKS) { + struct ieee80211_link_data *link; + + link = sdata_dereference(sdata->link[link_id], sdata); + + ret = ieee80211_link_use_channel(link, &link->conf->chandef, + IEEE80211_CHANCTX_SHARED); + WARN_ON_ONCE(ret); + + ieee80211_link_info_change_notify(sdata, link, + BSS_CHANGED_ERP_CTS_PROT | + BSS_CHANGED_ERP_PREAMBLE | + BSS_CHANGED_ERP_SLOT | + BSS_CHANGED_HT | + BSS_CHANGED_BASIC_RATES | + BSS_CHANGED_BSSID | + BSS_CHANGED_CQM | + BSS_CHANGED_QOS | + BSS_CHANGED_TXPOWER | + BSS_CHANGED_BANDWIDTH | + BSS_CHANGED_TWT | + BSS_CHANGED_HE_OBSS_PD | + BSS_CHANGED_HE_BSS_COLOR); + ieee80211_mgd_set_link_qos_params(link); + } + + old_active = sdata->vif.active_links; + sdata->vif.active_links = active_links; + + if (rem) { + ret = drv_change_vif_links(local, sdata, old_active, + active_links, link_confs); + WARN_ON_ONCE(ret); + } + + return 0; +} + +int ieee80211_set_active_links(struct ieee80211_vif *vif, u16 active_links) +{ + struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); + struct ieee80211_local *local = sdata->local; + u16 old_active; + int ret; + + sdata_lock(sdata); + mutex_lock(&local->sta_mtx); + mutex_lock(&local->mtx); + mutex_lock(&local->key_mtx); + old_active = sdata->vif.active_links; + if (old_active & active_links) { + /* + * if there's at least one link that stays active across + * the change then switch to it (to those) first, and + * then enable the additional links + */ + ret = _ieee80211_set_active_links(sdata, + old_active & active_links); + if (!ret) + ret = _ieee80211_set_active_links(sdata, active_links); + } else { + /* otherwise switch directly */ + ret = _ieee80211_set_active_links(sdata, active_links); + } + mutex_unlock(&local->key_mtx); + mutex_unlock(&local->mtx); + mutex_unlock(&local->sta_mtx); + sdata_unlock(sdata); + + return ret; +} +EXPORT_SYMBOL_GPL(ieee80211_set_active_links); + +void ieee80211_set_active_links_async(struct ieee80211_vif *vif, + u16 active_links) +{ + struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); + + if (!ieee80211_sdata_running(sdata)) + return; + + if (sdata->vif.type != NL80211_IFTYPE_STATION) + return; + + /* cannot activate links that don't exist */ + if (active_links & ~sdata->vif.valid_links) + return; + + /* nothing to do */ + if (sdata->vif.active_links == active_links) + return; + + sdata->desired_active_links = active_links; + schedule_work(&sdata->activate_links_work); +} +EXPORT_SYMBOL_GPL(ieee80211_set_active_links_async); |