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authorJohannes Berg <johannes.berg@intel.com>2016-03-31 20:02:07 +0300
committerJohannes Berg <johannes.berg@intel.com>2016-04-06 14:18:16 +0300
commitb8da6b6a99b4b0d8d464b621ba7dcbcb08172b7d (patch)
tree706ea11b5ad9ba42d8ea9d3e83dee162e8f1443f /net/mac80211
parent2df8bfd7240117b91241a01e3f50f2e83827ccab (diff)
downloadlinux-b8da6b6a99b4b0d8d464b621ba7dcbcb08172b7d.tar.xz
mac80211: add separate last_ack variable
Instead of touching the rx_stats.last_rx from the status path, introduce and use a status_stats.last_ack variable. This will make rx_stats.last_rx indicate when the last frame was received, making it available for real "last_rx" and statistics gathering; statistics, when done per-CPU, will need to figure out which place was updated last for those items where the "last" value is exposed. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/ibss.c13
-rw-r--r--net/mac80211/sta_info.c13
-rw-r--r--net/mac80211/sta_info.h3
-rw-r--r--net/mac80211/status.c4
4 files changed, 24 insertions, 9 deletions
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index b3407dbe4b7d..c6d4b75eb60b 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -668,10 +668,11 @@ static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
rcu_read_lock();
list_for_each_entry_rcu(sta, &local->sta_list, list) {
+ unsigned long last_active = ieee80211_sta_last_active(sta);
+
if (sta->sdata == sdata &&
- time_after(sta->rx_stats.last_rx +
- IEEE80211_IBSS_MERGE_INTERVAL,
- jiffies)) {
+ time_is_after_jiffies(last_active +
+ IEEE80211_IBSS_MERGE_INTERVAL)) {
active++;
break;
}
@@ -1255,11 +1256,13 @@ static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata)
mutex_lock(&local->sta_mtx);
list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
+ unsigned long last_active = ieee80211_sta_last_active(sta);
+
if (sdata != sta->sdata)
continue;
- if (time_after(jiffies, sta->rx_stats.last_rx + exp_time) ||
- (time_after(jiffies, sta->rx_stats.last_rx + exp_rsn) &&
+ if (time_is_before_jiffies(last_active + exp_time) ||
+ (time_is_before_jiffies(last_active + exp_rsn) &&
sta->sta_state != IEEE80211_STA_AUTHORIZED)) {
sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n",
sta->sta_state != IEEE80211_STA_AUTHORIZED ?
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 4f19505f3757..ac73b9c7e8d8 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -1094,10 +1094,12 @@ void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
mutex_lock(&local->sta_mtx);
list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
+ unsigned long last_active = ieee80211_sta_last_active(sta);
+
if (sdata != sta->sdata)
continue;
- if (time_after(jiffies, sta->rx_stats.last_rx + exp_time)) {
+ if (time_is_before_jiffies(last_active + exp_time)) {
sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
sta->sta.addr);
@@ -2000,7 +2002,7 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
sinfo->inactive_time =
- jiffies_to_msecs(jiffies - sta->rx_stats.last_rx);
+ jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) |
BIT(NL80211_STA_INFO_TX_BYTES)))) {
@@ -2186,3 +2188,10 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
sinfo->expected_throughput = thr;
}
}
+
+unsigned long ieee80211_sta_last_active(struct sta_info *sta)
+{
+ if (time_after(sta->rx_stats.last_rx, sta->status_stats.last_ack))
+ return sta->rx_stats.last_rx;
+ return sta->status_stats.last_ack;
+}
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 93dc567e6100..8a8e84bfe3d2 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -474,6 +474,7 @@ struct sta_info {
unsigned long last_tdls_pkt_time;
u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
+ unsigned long last_ack;
} status_stats;
/* Updated from TX path only, no locking requirements */
@@ -680,4 +681,6 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
+unsigned long ieee80211_sta_last_active(struct sta_info *sta);
+
#endif /* STA_INFO_H */
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index 8b1b2ea03eb5..c6d5c724e032 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -188,7 +188,7 @@ static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
struct ieee80211_sub_if_data *sdata = sta->sdata;
if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
- sta->rx_stats.last_rx = jiffies;
+ sta->status_stats.last_ack = jiffies;
if (ieee80211_is_data_qos(mgmt->frame_control)) {
struct ieee80211_hdr *hdr = (void *) skb->data;
@@ -647,7 +647,7 @@ void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
sta->status_stats.retry_count += retry_count;
if (acked) {
- sta->rx_stats.last_rx = jiffies;
+ sta->status_stats.last_ack = jiffies;
if (sta->status_stats.lost_packets)
sta->status_stats.lost_packets = 0;