[PATCH AUTOSEL 4.14 10/61] mac80211: fix TX status reporting for ieee80211s

Sasha Levin
2018-10-16T04:14:19Z

From: Yuan-Chi Pang <fu3mo6goo@gmail.com>

[ Upstream commit c42055105785580563535e6d3143cad95c7ac7ee ]

TX status reporting to ieee80211s is through ieee80211s_update_metric.
There are two problems about ieee80211s_update_metric:

1. The purpose is to estimate the fail probability
to a specific link. No need to restrict to data frame.

2. Current implementation does not work if wireless driver does not
pass tx_status with skb.

Fix this by removing ieee80211_is_data condition, passing
ieee80211_tx_status directly to ieee80211s_update_metric, and
putting it in both __ieee80211_tx_status and ieee80211_tx_status_ext.

Signed-off-by: Yuan-Chi Pang <fu3mo6goo@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/mac80211/mesh.h | 3 ++-
net/mac80211/mesh_hwmp.c | 9 +++------
net/mac80211/status.c | 4 +++-
3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 7e5f271e3c30..4f1c61637ce3 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -217,7 +217,8 @@ void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
void ieee80211s_init(void);
void ieee80211s_update_metric(struct ieee80211_local *local,
- struct sta_info *sta, struct sk_buff *skb);
+ struct sta_info *sta,
+ struct ieee80211_tx_status *st);
void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata);
void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata);
int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata);
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 055ea36ff27b..fab0764c315f 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -295,15 +295,12 @@ int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
}

void ieee80211s_update_metric(struct ieee80211_local *local,
- struct sta_info *sta, struct sk_buff *skb)
+ struct sta_info *sta,
+ struct ieee80211_tx_status *st)
{
- struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ struct ieee80211_tx_info *txinfo = st->info;
int failed;

- if (!ieee80211_is_data(hdr->frame_control))
- return;
-
failed = !(txinfo->flags & IEEE80211_TX_STAT_ACK);

/* moving average, scaled to 100.
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index ccac205e5853..bdf131ed5ce8 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -797,7 +797,7 @@ static void __ieee80211_tx_status(struct ieee80211_hw *hw,

rate_control_tx_status(local, sband, status);
if (ieee80211_vif_is_mesh(&sta->sdata->vif))
- ieee80211s_update_metric(local, sta, skb);
+ ieee80211s_update_metric(local, sta, status);

if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
ieee80211_frame_acked(sta, skb);
@@ -958,6 +958,8 @@ void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
}

rate_control_tx_status(local, sband, status);
+ if (ieee80211_vif_is_mesh(&sta->sdata->vif))
+ ieee80211s_update_metric(local, sta, status);
}

if (acked || noack_success) {
--
2.17.1