2023-06-14 09:54:27

by Greenman, Gregory

[permalink] [raw]
Subject: [PATCH 17/20] wifi: iwlwifi: mvm: track u-APSD misbehaving AP by AP address

From: Johannes Berg <[email protected]>

If the AP is an AP MLD, then we shouldn't track just the BSSID
but the MLD address. Just generally use ap_addr since it has
the BSSID in the non-MLD case.

Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Gregory Greenman <[email protected]>
---
.../wireless/intel/iwlwifi/mvm/debugfs-vif.c | 6 ++--
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h | 2 +-
.../net/wireless/intel/iwlwifi/mvm/power.c | 35 ++++++++++++-------
3 files changed, 26 insertions(+), 17 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c
index 762bce70e262..92c325ff3e88 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
- * Copyright (C) 2012-2014, 2018-2021 Intel Corporation
+ * Copyright (C) 2012-2014, 2018-2023 Intel Corporation
* Copyright (C) 2013-2015 Intel Mobile Communications GmbH
* Copyright (C) 2016-2017 Intel Deutschland GmbH
*/
@@ -554,7 +554,7 @@ static ssize_t iwl_dbgfs_uapsd_misbehaving_read(struct file *file,
char buf[20];
int len;

- len = sprintf(buf, "%pM\n", mvmvif->uapsd_misbehaving_bssid);
+ len = sprintf(buf, "%pM\n", mvmvif->uapsd_misbehaving_ap_addr);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

@@ -567,7 +567,7 @@ static ssize_t iwl_dbgfs_uapsd_misbehaving_write(struct ieee80211_vif *vif,
bool ret;

mutex_lock(&mvm->mutex);
- ret = mac_pton(buf, mvmvif->uapsd_misbehaving_bssid);
+ ret = mac_pton(buf, mvmvif->uapsd_misbehaving_ap_addr);
mutex_unlock(&mvm->mutex);

return ret ? count : -EINVAL;
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index 3be67ec5cd4b..c1430e707f8f 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -419,7 +419,7 @@ struct iwl_mvm_vif {
#endif

/* FW identified misbehaving AP */
- u8 uapsd_misbehaving_bssid[ETH_ALEN];
+ u8 uapsd_misbehaving_ap_addr[ETH_ALEN] __aligned(2);
struct delayed_work uapsd_nonagg_detected_wk;

bool csa_countdown;
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/power.c b/drivers/net/wireless/intel/iwlwifi/mvm/power.c
index 19839cc44eb3..34d4b7a94d82 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/power.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/power.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
- * Copyright (C) 2012-2014, 2018-2019, 2021 Intel Corporation
+ * Copyright (C) 2012-2014, 2018-2019, 2021-2023 Intel Corporation
* Copyright (C) 2013-2014 Intel Mobile Communications GmbH
* Copyright (C) 2015-2017 Intel Deutschland GmbH
*/
@@ -237,8 +237,8 @@ static bool iwl_mvm_power_allow_uapsd(struct iwl_mvm *mvm,
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

- if (!memcmp(mvmvif->uapsd_misbehaving_bssid, vif->bss_conf.bssid,
- ETH_ALEN))
+ if (ether_addr_equal(mvmvif->uapsd_misbehaving_ap_addr,
+ vif->cfg.ap_addr))
return false;

/*
@@ -502,9 +502,9 @@ void iwl_mvm_power_vif_assoc(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

- if (memcmp(vif->bss_conf.bssid, mvmvif->uapsd_misbehaving_bssid,
- ETH_ALEN))
- eth_zero_addr(mvmvif->uapsd_misbehaving_bssid);
+ if (!ether_addr_equal(mvmvif->uapsd_misbehaving_ap_addr,
+ vif->cfg.ap_addr))
+ eth_zero_addr(mvmvif->uapsd_misbehaving_ap_addr);
}

static void iwl_mvm_power_uapsd_misbehav_ap_iterator(void *_data, u8 *mac,
@@ -512,14 +512,23 @@ static void iwl_mvm_power_uapsd_misbehav_ap_iterator(void *_data, u8 *mac,
{
u8 *ap_sta_id = _data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+ struct ieee80211_bss_conf *link_conf;
+ unsigned int link_id;

- /* The ap_sta_id is not expected to change during current association
- * so no explicit protection is needed
- */
- if (mvmvif->deflink.ap_sta_id == *ap_sta_id)
- memcpy(mvmvif->uapsd_misbehaving_bssid,
- vif->bss_conf.bssid,
- ETH_ALEN);
+ rcu_read_lock();
+ for_each_vif_active_link(vif, link_conf, link_id) {
+ struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id];
+
+ /* The ap_sta_id is not expected to change during current
+ * association so no explicit protection is needed
+ */
+ if (link_info->ap_sta_id == *ap_sta_id) {
+ ether_addr_copy(mvmvif->uapsd_misbehaving_ap_addr,
+ vif->cfg.ap_addr);
+ break;
+ }
+ }
+ rcu_read_unlock();
}

void iwl_mvm_power_uapsd_misbehaving_ap_notif(struct iwl_mvm *mvm,
--
2.38.1