[PATCH 5.15 019/207] mac80211: fix throughput LED trigger

Greg Kroah-Hartman
2021-12-06T15:35:28Z

From: Felix Fietkau <nbd@nbd.name>

[ Upstream commit 30f6cf96912b638d0ddfc325204b598f94efddc2 ]

The codepaths for rx with decap offload and tx with itxq were not updating
the counters for the throughput led trigger.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20211113063415.55147-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/mac80211/led.h | 8 ++++----
net/mac80211/rx.c | 7 ++++---
net/mac80211/tx.c | 34 +++++++++++++++-------------------
3 files changed, 23 insertions(+), 26 deletions(-)

diff --git a/net/mac80211/led.h b/net/mac80211/led.h
index fb3aaa3c56069..b71a1428d883c 100644
--- a/net/mac80211/led.h
+++ b/net/mac80211/led.h
@@ -72,19 +72,19 @@ static inline void ieee80211_mod_tpt_led_trig(struct ieee80211_local *local,
#endif

static inline void
-ieee80211_tpt_led_trig_tx(struct ieee80211_local *local, __le16 fc, int bytes)
+ieee80211_tpt_led_trig_tx(struct ieee80211_local *local, int bytes)
{
#ifdef CONFIG_MAC80211_LEDS
- if (ieee80211_is_data(fc) && atomic_read(&local->tpt_led_active))
+ if (atomic_read(&local->tpt_led_active))
local->tpt_led_trigger->tx_bytes += bytes;
#endif
}

static inline void
-ieee80211_tpt_led_trig_rx(struct ieee80211_local *local, __le16 fc, int bytes)
+ieee80211_tpt_led_trig_rx(struct ieee80211_local *local, int bytes)
{
#ifdef CONFIG_MAC80211_LEDS
- if (ieee80211_is_data(fc) && atomic_read(&local->tpt_led_active))
+ if (atomic_read(&local->tpt_led_active))
local->tpt_led_trigger->rx_bytes += bytes;
#endif
}
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 315a3e8e95496..1958e4d59b524 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -4874,6 +4874,7 @@ void ieee80211_rx_list(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta,
struct ieee80211_rate *rate = NULL;
struct ieee80211_supported_band *sband;
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;

WARN_ON_ONCE(softirq_count() == 0);

@@ -4970,9 +4971,9 @@ void ieee80211_rx_list(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta,
if (!(status->flag & RX_FLAG_8023))
skb = ieee80211_rx_monitor(local, skb, rate);
if (skb) {
- ieee80211_tpt_led_trig_rx(local,
- ((struct ieee80211_hdr *)skb->data)->frame_control,
- skb->len);
+ if ((status->flag & RX_FLAG_8023) ||
+ ieee80211_is_data_present(hdr->frame_control))
+ ieee80211_tpt_led_trig_rx(local, skb->len);

if (status->flag & RX_FLAG_8023)
__ieee80211_rx_handle_8023(hw, pubsta, skb, list);
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 8921088a5df65..0527bf41a32c7 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1720,21 +1720,19 @@ static bool ieee80211_tx_frags(struct ieee80211_local *local,
* Returns false if the frame couldn't be transmitted but was queued instead.
*/
static bool __ieee80211_tx(struct ieee80211_local *local,
- struct sk_buff_head *skbs, int led_len,
- struct sta_info *sta, bool txpending)
+ struct sk_buff_head *skbs, struct sta_info *sta,
+ bool txpending)
{
struct ieee80211_tx_info *info;
struct ieee80211_sub_if_data *sdata;
struct ieee80211_vif *vif;
struct sk_buff *skb;
bool result;
- __le16 fc;

if (WARN_ON(skb_queue_empty(skbs)))
return true;

skb = skb_peek(skbs);
- fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
info = IEEE80211_SKB_CB(skb);
sdata = vif_to_sdata(info->control.vif);
if (sta && !sta->uploaded)
@@ -1768,8 +1766,6 @@ static bool __ieee80211_tx(struct ieee80211_local *local,

result = ieee80211_tx_frags(local, vif, sta, skbs, txpending);

- ieee80211_tpt_led_trig_tx(local, fc, led_len);
-
WARN_ON_ONCE(!skb_queue_empty(skbs));

return result;
@@ -1919,7 +1915,6 @@ static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
ieee80211_tx_result res_prepare;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
bool result = true;
- int led_len;

if (unlikely(skb->len < 10)) {
dev_kfree_skb(skb);
@@ -1927,7 +1922,6 @@ static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
}

/* initialises tx */
- led_len = skb->len;
res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);

if (unlikely(res_prepare == TX_DROP)) {
@@ -1950,8 +1944,7 @@ static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
return true;

if (!invoke_tx_handlers_late(&tx))
- result = __ieee80211_tx(local, &tx.skbs, led_len,
- tx.sta, txpending);
+ result = __ieee80211_tx(local, &tx.skbs, tx.sta, txpending);

return result;
}
@@ -4174,6 +4167,7 @@ void __ieee80211_subif_start_xmit(struct sk_buff *skb,
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
struct sk_buff *next;
+ int len = skb->len;

if (unlikely(skb->len < ETH_HLEN)) {
kfree_skb(skb);
@@ -4220,10 +4214,8 @@ void __ieee80211_subif_start_xmit(struct sk_buff *skb,
}
} else {
/* we cannot process non-linear frames on this path */
- if (skb_linearize(skb)) {
- kfree_skb(skb);
- goto out;
- }
+ if (skb_linearize(skb))
+ goto out_free;

/* the frame could be fragmented, software-encrypted, and other
* things so we cannot really handle checksum offload with it -
@@ -4257,7 +4249,10 @@ void __ieee80211_subif_start_xmit(struct sk_buff *skb,
goto out;
out_free:
kfree_skb(skb);
+ len = 0;
out:
+ if (len)
+ ieee80211_tpt_led_trig_tx(local, len);
rcu_read_unlock();
}

@@ -4395,8 +4390,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
}

static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
- struct sk_buff *skb, int led_len,
- struct sta_info *sta,
+ struct sk_buff *skb, struct sta_info *sta,
bool txpending)
{
struct ieee80211_local *local = sdata->local;
@@ -4409,6 +4403,8 @@ static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
if (sta)
sk_pacing_shift_update(skb->sk, local->hw.tx_sk_pacing_shift);

+ ieee80211_tpt_led_trig_tx(local, skb->len);
+
if (ieee80211_queue_skb(local, sdata, sta, skb))
return true;

@@ -4497,7 +4493,7 @@ static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
if (key)
info->control.hw_key = &key->conf;

- ieee80211_tx_8023(sdata, skb, skb->len, sta, false);
+ ieee80211_tx_8023(sdata, skb, sta, false);

return;

@@ -4636,7 +4632,7 @@ static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
if (IS_ERR(sta) || (sta && !sta->uploaded))
sta = NULL;

- result = ieee80211_tx_8023(sdata, skb, skb->len, sta, true);
+ result = ieee80211_tx_8023(sdata, skb, sta, true);
} else {
struct sk_buff_head skbs;

@@ -4646,7 +4642,7 @@ static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
hdr = (struct ieee80211_hdr *)skb->data;
sta = sta_info_get(sdata, hdr->addr1);

- result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
+ result = __ieee80211_tx(local, &skbs, sta, true);
}

return result;
--
2.33.0