mac80211: rename csa counters to countdown counters

We want to reuse the functions and structs for other counters such as BSS
color change. Rename them to more generic names.

Signed-off-by: John Crispin <john@phrozen.org>
Link: https://lore.kernel.org/r/20200811080107.3615705-2-john@phrozen.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

7 files changed, 53 insertions, 52 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 87fddd84c621..b4e39e31a985 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -826,9 +826,9 @@ static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
 	memcpy(new->data, resp, resp_len);
 
 	if (csa)
-		memcpy(new->csa_counter_offsets, csa->counter_offsets_presp,
+		memcpy(new->cntdwn_counter_offsets, csa->counter_offsets_presp,
 		       csa->n_counter_offsets_presp *
-		       sizeof(new->csa_counter_offsets[0]));
+		       sizeof(new->cntdwn_counter_offsets[0]));
 
 	rcu_assign_pointer(sdata->u.ap.probe_resp, new);
 	if (old)
@@ -926,10 +926,10 @@ static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
 	new->tail_len = new_tail_len;
 
 	if (csa) {
-		new->csa_current_counter = csa->count;
-		memcpy(new->csa_counter_offsets, csa->counter_offsets_beacon,
+		new->cntdwn_current_counter = csa->count;
+		memcpy(new->cntdwn_counter_offsets, csa->counter_offsets_beacon,
 		       csa->n_counter_offsets_beacon *
-		       sizeof(new->csa_counter_offsets[0]));
+		       sizeof(new->cntdwn_counter_offsets[0]));
 	}
 
 	/* copy in head */
@@ -3186,9 +3186,9 @@ static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
 			break;
 
 		if ((params->n_counter_offsets_beacon >
-		     IEEE80211_MAX_CSA_COUNTERS_NUM) ||
+		     IEEE80211_MAX_CNTDWN_COUNTERS_NUM) ||
 		    (params->n_counter_offsets_presp >
-		     IEEE80211_MAX_CSA_COUNTERS_NUM))
+		     IEEE80211_MAX_CNTDWN_COUNTERS_NUM))
 			return -EINVAL;
 
 		csa.counter_offsets_beacon = params->counter_offsets_beacon;
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 53632c2f5217..c0963969a465 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -145,9 +145,9 @@ ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata,
 		*pos++ = csa_settings->block_tx ? 1 : 0;
 		*pos++ = ieee80211_frequency_to_channel(
 				csa_settings->chandef.chan->center_freq);
-		presp->csa_counter_offsets[0] = (pos - presp->head);
+		presp->cntdwn_counter_offsets[0] = (pos - presp->head);
 		*pos++ = csa_settings->count;
-		presp->csa_current_counter = csa_settings->count;
+		presp->cntdwn_current_counter = csa_settings->count;
 	}
 
 	/* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 0b1eaec6649f..6bf879660a93 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -259,15 +259,15 @@ struct beacon_data {
 	u8 *head, *tail;
 	int head_len, tail_len;
 	struct ieee80211_meshconf_ie *meshconf;
-	u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
-	u8 csa_current_counter;
+	u16 cntdwn_counter_offsets[IEEE80211_MAX_CNTDWN_COUNTERS_NUM];
+	u8 cntdwn_current_counter;
 	struct rcu_head rcu_head;
 };
 
 struct probe_resp {
 	struct rcu_head rcu_head;
 	int len;
-	u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
+	u16 cntdwn_counter_offsets[IEEE80211_MAX_CNTDWN_COUNTERS_NUM];
 	u8 data[];
 };
 
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index b4a2efe8e83a..523380aed92e 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -1168,7 +1168,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 				WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
 	}
 
-	local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
+	local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
 
 	/*
 	 * We use the number of queues for feature tests (QoS, HT) internally
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index b124faf1e527..ce5825d6f1d1 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -864,8 +864,8 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
 		*pos++ = 0x0;
 		*pos++ = ieee80211_frequency_to_channel(
 				csa->settings.chandef.chan->center_freq);
-		bcn->csa_current_counter = csa->settings.count;
-		bcn->csa_counter_offsets[0] = hdr_len + 6;
+		bcn->cntdwn_current_counter = csa->settings.count;
+		bcn->cntdwn_counter_offsets[0] = hdr_len + 6;
 		*pos++ = csa->settings.count;
 		*pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
 		*pos++ = 6;
diff --git a/net/mac80211/offchannel.c b/net/mac80211/offchannel.c
index f470d1a7ce9b..1ac7b8c374c9 100644
--- a/net/mac80211/offchannel.c
+++ b/net/mac80211/offchannel.c
@@ -916,7 +916,7 @@ int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
 		if (beacon)
 			for (i = 0; i < params->n_csa_offsets; i++)
 				data[params->csa_offsets[i]] =
-					beacon->csa_current_counter;
+					beacon->cntdwn_current_counter;
 
 		rcu_read_unlock();
 	}
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index dca01d7e6e3e..d2136007e2eb 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -4538,14 +4538,14 @@ static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
 	return 0;
 }
 
-static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
-			      struct beacon_data *beacon)
+static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata,
+					struct beacon_data *beacon)
 {
 	struct probe_resp *resp;
 	u8 *beacon_data;
 	size_t beacon_data_len;
 	int i;
-	u8 count = beacon->csa_current_counter;
+	u8 count = beacon->cntdwn_current_counter;
 
 	switch (sdata->vif.type) {
 	case NL80211_IFTYPE_AP:
@@ -4565,36 +4565,36 @@ static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
 	}
 
 	rcu_read_lock();
-	for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
+	for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; ++i) {
 		resp = rcu_dereference(sdata->u.ap.probe_resp);
 
-		if (beacon->csa_counter_offsets[i]) {
-			if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
+		if (beacon->cntdwn_counter_offsets[i]) {
+			if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[i] >=
 					 beacon_data_len)) {
 				rcu_read_unlock();
 				return;
 			}
 
-			beacon_data[beacon->csa_counter_offsets[i]] = count;
+			beacon_data[beacon->cntdwn_counter_offsets[i]] = count;
 		}
 
 		if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
-			resp->data[resp->csa_counter_offsets[i]] = count;
+			resp->data[resp->cntdwn_counter_offsets[i]] = count;
 	}
 	rcu_read_unlock();
 }
 
-static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
+static u8 __ieee80211_beacon_update_cntdwn(struct beacon_data *beacon)
 {
-	beacon->csa_current_counter--;
+	beacon->cntdwn_current_counter--;
 
 	/* the counter should never reach 0 */
-	WARN_ON_ONCE(!beacon->csa_current_counter);
+	WARN_ON_ONCE(!beacon->cntdwn_current_counter);
 
-	return beacon->csa_current_counter;
+	return beacon->cntdwn_current_counter;
 }
 
-u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
+u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif)
 {
 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 	struct beacon_data *beacon = NULL;
@@ -4612,15 +4612,15 @@ u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
 	if (!beacon)
 		goto unlock;
 
-	count = __ieee80211_csa_update_counter(beacon);
+	count = __ieee80211_beacon_update_cntdwn(beacon);
 
 unlock:
 	rcu_read_unlock();
 	return count;
 }
-EXPORT_SYMBOL(ieee80211_csa_update_counter);
+EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn);
 
-void ieee80211_csa_set_counter(struct ieee80211_vif *vif, u8 counter)
+void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter)
 {
 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 	struct beacon_data *beacon = NULL;
@@ -4637,15 +4637,15 @@ void ieee80211_csa_set_counter(struct ieee80211_vif *vif, u8 counter)
 	if (!beacon)
 		goto unlock;
 
-	if (counter < beacon->csa_current_counter)
-		beacon->csa_current_counter = counter;
+	if (counter < beacon->cntdwn_current_counter)
+		beacon->cntdwn_current_counter = counter;
 
 unlock:
 	rcu_read_unlock();
 }
-EXPORT_SYMBOL(ieee80211_csa_set_counter);
+EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn);
 
-bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
+bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif)
 {
 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 	struct beacon_data *beacon = NULL;
@@ -4688,20 +4688,21 @@ bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
 		goto out;
 	}
 
-	if (!beacon->csa_counter_offsets[0])
+	if (!beacon->cntdwn_counter_offsets[0])
 		goto out;
 
-	if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
+	if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len))
 		goto out;
 
-	if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
+	if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1)
 		ret = true;
+
  out:
 	rcu_read_unlock();
 
 	return ret;
 }
-EXPORT_SYMBOL(ieee80211_csa_is_complete);
+EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete);
 
 static int ieee80211_beacon_protect(struct sk_buff *skb,
 				    struct ieee80211_local *local,
@@ -4761,11 +4762,11 @@ __ieee80211_beacon_get(struct ieee80211_hw *hw,
 
 		beacon = rcu_dereference(ap->beacon);
 		if (beacon) {
-			if (beacon->csa_counter_offsets[0]) {
+			if (beacon->cntdwn_counter_offsets[0]) {
 				if (!is_template)
-					__ieee80211_csa_update_counter(beacon);
+					ieee80211_beacon_update_cntdwn(vif);
 
-				ieee80211_set_csa(sdata, beacon);
+				ieee80211_set_beacon_cntdwn(sdata, beacon);
 			}
 
 			/*
@@ -4809,11 +4810,11 @@ __ieee80211_beacon_get(struct ieee80211_hw *hw,
 		if (!beacon)
 			goto out;
 
-		if (beacon->csa_counter_offsets[0]) {
+		if (beacon->cntdwn_counter_offsets[0]) {
 			if (!is_template)
-				__ieee80211_csa_update_counter(beacon);
+				__ieee80211_beacon_update_cntdwn(beacon);
 
-			ieee80211_set_csa(sdata, beacon);
+			ieee80211_set_beacon_cntdwn(sdata, beacon);
 		}
 
 		skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
@@ -4833,16 +4834,16 @@ __ieee80211_beacon_get(struct ieee80211_hw *hw,
 		if (!beacon)
 			goto out;
 
-		if (beacon->csa_counter_offsets[0]) {
+		if (beacon->cntdwn_counter_offsets[0]) {
 			if (!is_template)
 				/* TODO: For mesh csa_counter is in TU, so
 				 * decrementing it by one isn't correct, but
 				 * for now we leave it consistent with overall
 				 * mac80211's behavior.
 				 */
-				__ieee80211_csa_update_counter(beacon);
+				__ieee80211_beacon_update_cntdwn(beacon);
 
-			ieee80211_set_csa(sdata, beacon);
+			ieee80211_set_beacon_cntdwn(sdata, beacon);
 		}
 
 		if (ifmsh->sync_ops)
@@ -4874,13 +4875,13 @@ __ieee80211_beacon_get(struct ieee80211_hw *hw,
 	if (offs && beacon) {
 		int i;
 
-		for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
-			u16 csa_off = beacon->csa_counter_offsets[i];
+		for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) {
+			u16 csa_off = beacon->cntdwn_counter_offsets[i];
 
 			if (!csa_off)
 				continue;
 
-			offs->csa_counter_offs[i] = csa_off_base + csa_off;
+			offs->cntdwn_counter_offs[i] = csa_off_base + csa_off;
 		}
 	}