@@ -1531,8 +1531,14 @@ static int ath11k_mac_set_vif_params(struct ath11k_vif *arvif,
static struct ath11k_vif *ath11k_mac_get_tx_arvif(struct ath11k_vif *arvif)
{
- if (arvif->vif->mbssid_tx_vif)
- return ath11k_vif_to_arvif(arvif->vif->mbssid_tx_vif);
+ struct ieee80211_bss_conf *link_conf, *tx_bss_conf;
+
+ lockdep_assert_wiphy(arvif->ar->hw->wiphy);
+
+ link_conf = &arvif->vif->bss_conf;
+ tx_bss_conf = wiphy_dereference(arvif->ar->hw->wiphy, link_conf->tx_bss_conf);
+ if (tx_bss_conf)
+ return ath11k_vif_to_arvif(tx_bss_conf->vif);
return NULL;
}
@@ -582,12 +582,26 @@ static int ath12k_mac_vif_link_chan(struct ieee80211_vif *vif, u8 link_id,
static struct ath12k_link_vif *ath12k_mac_get_tx_arvif(struct ath12k_link_vif *arvif)
{
+ struct ieee80211_bss_conf *link_conf, *tx_bss_conf;
+ struct ath12k *ar = arvif->ar;
struct ath12k_vif *tx_ahvif;
- if (arvif->ahvif->vif->mbssid_tx_vif) {
- tx_ahvif = ath12k_vif_to_ahvif(arvif->ahvif->vif->mbssid_tx_vif);
- if (tx_ahvif)
- return &tx_ahvif->deflink;
+ lockdep_assert_wiphy(ath12k_ar_to_hw(ar)->wiphy);
+
+ link_conf = ath12k_mac_get_link_bss_conf(arvif);
+ if (!link_conf) {
+ ath12k_warn(ar->ab,
+ "unable to access bss link conf for link %u required to retrieve transmitting link conf\n",
+ arvif->link_id);
+ return NULL;
+ }
+
+ tx_bss_conf = wiphy_dereference(ath12k_ar_to_hw(ar)->wiphy,
+ link_conf->tx_bss_conf);
+ if (tx_bss_conf) {
+ tx_ahvif = ath12k_vif_to_ahvif(tx_bss_conf->vif);
+ return wiphy_dereference(tx_ahvif->ah->hw->wiphy,
+ tx_ahvif->link[tx_bss_conf->link_id]);
}
return NULL;
@@ -2271,7 +2271,7 @@ static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
{
struct mac80211_hwsim_link_data *link_data = arg;
u32 link_id = link_data->link_id;
- struct ieee80211_bss_conf *link_conf;
+ struct ieee80211_bss_conf *link_conf, *tx_bss_conf;
struct mac80211_hwsim_data *data =
container_of(link_data, struct mac80211_hwsim_data,
link_data[link_id]);
@@ -2290,10 +2290,11 @@ static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
vif->type != NL80211_IFTYPE_OCB)
return;
- if (vif->mbssid_tx_vif && vif->mbssid_tx_vif != vif)
+ tx_bss_conf = rcu_access_pointer(link_conf->tx_bss_conf);
+ if (tx_bss_conf && tx_bss_conf != link_conf)
return;
- if (vif->bss_conf.ema_ap) {
+ if (link_conf->ema_ap) {
struct ieee80211_ema_beacons *ema;
u8 i = 0;
@@ -682,6 +682,9 @@ struct ieee80211_parsed_tpe {
* responder functionality.
* @ftmr_params: configurable lci/civic parameter when enabling FTM responder.
* @nontransmitted: this BSS is a nontransmitted BSS profile
+ * @tx_bss_conf: Pointer to the BSS configuration of transmitting interface
+ * if MBSSID is enabled. This pointer is RCU-protected due to CSA finish
+ * and BSS color change flows accessing it.
* @transmitter_bssid: the address of transmitter AP
* @bssid_index: index inside the multiple BSSID set
* @bssid_indicator: 2^bssid_indicator is the maximum number of APs in set
@@ -804,6 +807,7 @@ struct ieee80211_bss_conf {
struct ieee80211_ftm_responder_params *ftmr_params;
/* Multiple BSSID data */
bool nontransmitted;
+ struct ieee80211_bss_conf __rcu *tx_bss_conf;
u8 transmitter_bssid[ETH_ALEN];
u8 bssid_index;
u8 bssid_indicator;
@@ -2023,7 +2027,6 @@ enum ieee80211_neg_ttlm_res {
* @txq: the multicast data TX queue
* @offload_flags: 802.3 -> 802.11 enapsulation offload flags, see
* &enum ieee80211_offload_flags.
- * @mbssid_tx_vif: Pointer to the transmitting interface if MBSSID is enabled.
*/
struct ieee80211_vif {
enum nl80211_iftype type;
@@ -2052,8 +2055,6 @@ struct ieee80211_vif {
bool probe_req_reg;
bool rx_mcast_action_reg;
- struct ieee80211_vif *mbssid_tx_vif;
-
/* must be last */
u8 drv_priv[] __aligned(sizeof(void *));
};
@@ -146,8 +146,8 @@ static int ieee80211_set_ap_mbssid_options(struct ieee80211_sub_if_data *sdata,
struct ieee80211_bss_conf *link_conf)
{
struct ieee80211_sub_if_data *tx_sdata;
+ struct ieee80211_bss_conf *old;
- sdata->vif.mbssid_tx_vif = NULL;
link_conf->bssid_index = 0;
link_conf->nontransmitted = false;
link_conf->ema_ap = false;
@@ -156,14 +156,26 @@ static int ieee80211_set_ap_mbssid_options(struct ieee80211_sub_if_data *sdata,
if (sdata->vif.type != NL80211_IFTYPE_AP || !params->tx_wdev)
return -EINVAL;
+ old = sdata_dereference(link_conf->tx_bss_conf, sdata);
+ if (old)
+ return -EALREADY;
+
tx_sdata = IEEE80211_WDEV_TO_SUB_IF(params->tx_wdev);
if (!tx_sdata)
return -EINVAL;
if (tx_sdata == sdata) {
- sdata->vif.mbssid_tx_vif = &sdata->vif;
+ rcu_assign_pointer(link_conf->tx_bss_conf, link_conf);
} else {
- sdata->vif.mbssid_tx_vif = &tx_sdata->vif;
+ struct ieee80211_bss_conf *tx_bss_conf;
+
+ tx_bss_conf = sdata_dereference(tx_sdata->vif.link_conf[params->tx_link_id],
+ sdata);
+ if (rcu_access_pointer(tx_bss_conf->tx_bss_conf) != tx_bss_conf)
+ return -EINVAL;
+
+ rcu_assign_pointer(link_conf->tx_bss_conf, tx_bss_conf);
+
link_conf->nontransmitted = true;
link_conf->bssid_index = params->index;
}
@@ -1669,7 +1681,6 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev,
kfree(link_conf->ftmr_params);
link_conf->ftmr_params = NULL;
- sdata->vif.mbssid_tx_vif = NULL;
link_conf->bssid_index = 0;
link_conf->nontransmitted = false;
link_conf->ema_ap = false;
@@ -1683,6 +1694,9 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev,
ieee80211_free_key_list(local, &keys);
}
+ ieee80211_stop_mbssid(sdata);
+ RCU_INIT_POINTER(link_conf->tx_bss_conf, NULL);
+
link_conf->enable_beacon = false;
sdata->beacon_rate_set = false;
sdata->vif.cfg.ssid_len = 0;
@@ -3700,6 +3714,7 @@ void ieee80211_csa_finish(struct ieee80211_vif *vif, unsigned int link_id)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
struct ieee80211_local *local = sdata->local;
+ struct ieee80211_bss_conf *tx_bss_conf;
struct ieee80211_link_data *link_data;
if (WARN_ON(link_id >= IEEE80211_MLD_MAX_NUM_LINKS))
@@ -3713,25 +3728,24 @@ void ieee80211_csa_finish(struct ieee80211_vif *vif, unsigned int link_id)
return;
}
- /* TODO: MBSSID with MLO changes */
- if (vif->mbssid_tx_vif == vif) {
+ tx_bss_conf = rcu_dereference(link_data->conf->tx_bss_conf);
+ if (tx_bss_conf == link_data->conf) {
/* Trigger ieee80211_csa_finish() on the non-transmitting
* interfaces when channel switch is received on
* transmitting interface
*/
- struct ieee80211_sub_if_data *iter;
-
- list_for_each_entry_rcu(iter, &local->interfaces, list) {
- if (!ieee80211_sdata_running(iter))
- continue;
+ struct ieee80211_link_data *iter;
- if (iter == sdata || iter->vif.mbssid_tx_vif != vif)
+ for_each_sdata_link(local, iter) {
+ if (iter->sdata == sdata ||
+ rcu_access_pointer(iter->conf->tx_bss_conf) != tx_bss_conf)
continue;
- wiphy_work_queue(iter->local->hw.wiphy,
- &iter->deflink.csa.finalize_work);
+ wiphy_work_queue(iter->sdata->local->hw.wiphy,
+ &iter->csa.finalize_work);
}
}
+
wiphy_work_queue(local->hw.wiphy, &link_data->csa.finalize_work);
rcu_read_unlock();
@@ -4833,17 +4847,19 @@ ieee80211_color_change_bss_config_notify(struct ieee80211_link_data *link,
ieee80211_link_info_change_notify(sdata, link, changed);
- if (!sdata->vif.bss_conf.nontransmitted && sdata->vif.mbssid_tx_vif) {
- struct ieee80211_sub_if_data *child;
+ if (!link->conf->nontransmitted &&
+ rcu_access_pointer(link->conf->tx_bss_conf)) {
+ struct ieee80211_link_data *tmp;
- list_for_each_entry(child, &sdata->local->interfaces, list) {
- if (child != sdata && child->vif.mbssid_tx_vif == &sdata->vif) {
- child->vif.bss_conf.he_bss_color.color = color;
- child->vif.bss_conf.he_bss_color.enabled = enable;
- ieee80211_link_info_change_notify(child,
- &child->deflink,
- BSS_CHANGED_HE_BSS_COLOR);
- }
+ for_each_sdata_link(sdata->local, tmp) {
+ if (tmp->sdata == sdata ||
+ rcu_access_pointer(tmp->conf->tx_bss_conf) != link->conf)
+ continue;
+
+ tmp->conf->he_bss_color.color = color;
+ tmp->conf->he_bss_color.enabled = enable;
+ ieee80211_link_info_change_notify(tmp->sdata, tmp,
+ BSS_CHANGED_HE_BSS_COLOR);
}
}
}
@@ -2794,6 +2794,8 @@ int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata,
void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgmt *mgmt, size_t len);
+void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata);
+
#if IS_ENABLED(CONFIG_MAC80211_KUNIT_TEST)
#define EXPORT_SYMBOL_IF_MAC80211_KUNIT(sym) EXPORT_SYMBOL_IF_KUNIT(sym)
#define VISIBLE_IF_MAC80211_KUNIT
@@ -726,30 +726,57 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_do
ieee80211_add_virtual_monitor(local);
}
-static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
+void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
{
- struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata;
- struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif;
+ struct ieee80211_sub_if_data *tx_sdata;
+ struct ieee80211_bss_conf *link_conf, *tx_bss_conf;
+ struct ieee80211_link_data *tx_link, *link;
+ unsigned int link_id;
- if (!tx_vif)
- return;
+ lockdep_assert_wiphy(sdata->local->hw.wiphy);
+
+ /* Check if any of the links of current sdata is an MBSSID. */
+ for_each_vif_active_link(&sdata->vif, link_conf, link_id) {
+ tx_bss_conf = sdata_dereference(link_conf->tx_bss_conf, sdata);
+ if (!tx_bss_conf)
+ continue;
- tx_sdata = vif_to_sdata(tx_vif);
- sdata->vif.mbssid_tx_vif = NULL;
+ tx_sdata = vif_to_sdata(tx_bss_conf->vif);
+ RCU_INIT_POINTER(link_conf->tx_bss_conf, NULL);
- list_for_each_entry_safe(non_tx_sdata, tmp_sdata,
- &tx_sdata->local->interfaces, list) {
- if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata &&
- non_tx_sdata->vif.mbssid_tx_vif == tx_vif &&
- ieee80211_sdata_running(non_tx_sdata)) {
- non_tx_sdata->vif.mbssid_tx_vif = NULL;
- dev_close(non_tx_sdata->wdev.netdev);
+ /* If we are not tx sdata reset tx sdata's tx_bss_conf to avoid recusrion while
+ * closing tx sdata at the end of outer loop below.
+ */
+ if (sdata != tx_sdata) {
+ tx_link = sdata_dereference(tx_sdata->link[tx_bss_conf->link_id], tx_sdata);
+ if (!tx_link)
+ continue;
+
+ RCU_INIT_POINTER(tx_link->conf->tx_bss_conf, NULL);
+ }
+
+ /* loop through sdatas to find if any of their links
+ * belong to same MBSSID set as the one getting deleted.
+ */
+ for_each_sdata_link(tx_sdata->local, link) {
+ struct ieee80211_sub_if_data *link_sdata = link->sdata;
+
+ if (link_sdata == sdata || link_sdata == tx_sdata ||
+ rcu_access_pointer(link->conf->tx_bss_conf) != tx_bss_conf)
+ continue;
+
+ RCU_INIT_POINTER(link->conf->tx_bss_conf, NULL);
+
+ /* Remove all links of matching MLD until dynamic link
+ * removal can be supported.
+ */
+ cfg80211_stop_iface(link_sdata->wdev.wiphy, &link_sdata->wdev, GFP_KERNEL);
}
- }
- if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) {
- tx_sdata->vif.mbssid_tx_vif = NULL;
- dev_close(tx_sdata->wdev.netdev);
+ /* If we are not tx sdata, remove links of tx sdata and proceed */
+ if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata))
+ cfg80211_stop_iface(tx_sdata->wdev.wiphy,
+ &tx_sdata->wdev, GFP_KERNEL);
}
}
@@ -757,21 +784,25 @@ static int ieee80211_stop(struct net_device *dev)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- /* close dependent VLAN and MBSSID interfaces before locking wiphy */
+ /* close dependent VLAN interfaces before locking wiphy */
if (sdata->vif.type == NL80211_IFTYPE_AP) {
struct ieee80211_sub_if_data *vlan, *tmpsdata;
list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
u.vlan.list)
dev_close(vlan->dev);
-
- ieee80211_stop_mbssid(sdata);
}
guard(wiphy)(sdata->local->hw.wiphy);
wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->activate_links_work);
+ /* Close the dependent MBSSID interfaces with wiphy lock as we may be
+ * terminating its partner links too in case of MLD.
+ */
+ if (sdata->vif.type == NL80211_IFTYPE_AP)
+ ieee80211_stop_mbssid(sdata);
+
ieee80211_do_stop(sdata, true);
return 0;