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authorJohn Crispin <john@phrozen.org>2021-09-16 05:54:35 +0300
committerJohannes Berg <johannes.berg@intel.com>2021-09-28 15:22:18 +0300
commit171964252189d8ad5672c730f2197aa73092db6e (patch)
treeb06d2cbb796342d95a5c521b83b58e615e505cde
parentdc1e3cb8da8b414b37208b2fb6755fef8122504b (diff)
downloadlinux-171964252189d8ad5672c730f2197aa73092db6e.tar.xz
mac80211: MBSSID support in interface handling
Configure multiple BSSID and enhanced multi-BSSID advertisement (EMA) parameters in mac80211 for AP mode. For each interface, 'mbssid_tx_vif' points to the transmitting interface of the MBSSID set. The pointer is set to NULL if MBSSID is disabled. Function ieee80211_stop() is modified to always bring down all the non-transmitting interfaces first and the transmitting interface last. Signed-off-by: John Crispin <john@phrozen.org> Co-developed-by: Aloka Dixit <alokad@codeaurora.org> Signed-off-by: Aloka Dixit <alokad@codeaurora.org> Link: https://lore.kernel.org/r/20210916025437.29138-3-alokad@codeaurora.org [slightly change logic to be more obvious] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
-rw-r--r--include/net/mac80211.h3
-rw-r--r--net/mac80211/cfg.c38
-rw-r--r--net/mac80211/iface.c31
3 files changed, 71 insertions, 1 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 16a965262a4f..13cad5e9e6c0 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1723,6 +1723,7 @@ enum ieee80211_offload_flags {
* write-protected by sdata_lock and local->mtx so holding either is fine
* for read access.
* @color_change_color: the bss color that will be used after the change.
+ * @mbssid_tx_vif: Pointer to the transmitting interface if MBSSID is enabled.
*/
struct ieee80211_vif {
enum nl80211_iftype type;
@@ -1754,6 +1755,8 @@ struct ieee80211_vif {
bool color_change_active;
u8 color_change_color;
+ struct ieee80211_vif *mbssid_tx_vif;
+
/* must be last */
u8 drv_priv[] __aligned(sizeof(void *));
};
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index d69b31c20fe2..e2b791c37591 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -111,6 +111,36 @@ static int ieee80211_set_mon_options(struct ieee80211_sub_if_data *sdata,
return 0;
}
+static int ieee80211_set_ap_mbssid_options(struct ieee80211_sub_if_data *sdata,
+ struct cfg80211_mbssid_config params)
+{
+ struct ieee80211_sub_if_data *tx_sdata;
+
+ sdata->vif.mbssid_tx_vif = NULL;
+ sdata->vif.bss_conf.bssid_index = 0;
+ sdata->vif.bss_conf.nontransmitted = false;
+ sdata->vif.bss_conf.ema_ap = false;
+
+ if (sdata->vif.type != NL80211_IFTYPE_AP || !params.tx_wdev)
+ return -EINVAL;
+
+ 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;
+ } else {
+ sdata->vif.mbssid_tx_vif = &tx_sdata->vif;
+ sdata->vif.bss_conf.nontransmitted = true;
+ sdata->vif.bss_conf.bssid_index = params.index;
+ }
+ if (params.ema)
+ sdata->vif.bss_conf.ema_ap = true;
+
+ return 0;
+}
+
static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
const char *name,
unsigned char name_assign_type,
@@ -1105,6 +1135,14 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
changed |= BSS_CHANGED_HE_BSS_COLOR;
}
+ if (sdata->vif.type == NL80211_IFTYPE_AP &&
+ params->mbssid_config.tx_wdev) {
+ err = ieee80211_set_ap_mbssid_options(sdata,
+ params->mbssid_config);
+ if (err)
+ return err;
+ }
+
mutex_lock(&local->mtx);
err = ieee80211_vif_use_channel(sdata, &params->chandef,
IEEE80211_CHANCTX_SHARED);
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 62c95597704b..691b983b762e 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -632,17 +632,46 @@ 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)
+{
+ struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata;
+ struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif;
+
+ if (!tx_vif)
+ return;
+
+ tx_sdata = vif_to_sdata(tx_vif);
+ sdata->vif.mbssid_tx_vif = 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 (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) {
+ tx_sdata->vif.mbssid_tx_vif = NULL;
+ dev_close(tx_sdata->wdev.netdev);
+ }
+}
+
static int ieee80211_stop(struct net_device *dev)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
- /* close all dependent VLAN interfaces before locking wiphy */
+ /* close dependent VLAN and MBSSID 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);
}
wiphy_lock(sdata->local->hw.wiphy);