From: Mohammed Shafi Shajakhan <mohammed@xxxxxxxxxxxxxxxx>
when we obtain time_since_last_beacon_ms parameter from the mac80211
debugfs it should be always less than 100, otherwise we are missing
beacons.
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@xxxxxxxxxxxxxxxx>
---
net/mac80211/debugfs_netdev.c | 14 ++++++++++++++
net/mac80211/ieee80211_i.h | 3 +++
net/mac80211/mlme.c | 2 ++
3 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 9ea7c0d..18e1bfc 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -157,6 +157,19 @@ IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
IEEE80211_IF_FILE(last_beacon, u.mgd.last_beacon_signal, DEC);
IEEE80211_IF_FILE(ave_beacon, u.mgd.ave_beacon_signal, DEC_DIV_16);
+static ssize_t ieee80211_if_fmt_time_since_last_beacon_ms(
+ const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
+{
+ const struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+ unsigned long time_since_last_beacon;
+
+ time_since_last_beacon = jiffies_to_msecs(jiffies -
+ ifmgd->last_beacon_timestamp);
+ return scnprintf(buf, buflen, "%lu\n",
+ time_since_last_beacon);
+}
+__IEEE80211_IF_FILE(time_since_last_beacon_ms, NULL);
+
static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata,
enum ieee80211_smps_mode smps_mode)
{
@@ -394,6 +407,7 @@ static void add_sta_files(struct ieee80211_sub_if_data *sdata)
DEBUGFS_ADD(bssid);
DEBUGFS_ADD(aid);
+ DEBUGFS_ADD(time_since_last_beacon_ms);
DEBUGFS_ADD(last_beacon);
DEBUGFS_ADD(ave_beacon);
DEBUGFS_ADD_MODE(smps, 0600);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index ea74190..ec532a5 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -410,6 +410,9 @@ struct ieee80211_if_managed {
u8 use_4addr;
+ /* timestamp of the last Beacon frame in the current BSS. */
+ unsigned long last_beacon_timestamp;
+
/* Signal strength from the last Beacon frame in the current BSS. */
int last_beacon_signal;
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index d6470c7..13ee1b6 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1758,6 +1758,8 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
return;
+ ifmgd->last_beacon_timestamp = jiffies;
+
/* Track average RSSI from the Beacon frames of the current AP */
ifmgd->last_beacon_signal = rx_status->signal;
if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
--
1.7.0.4
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