diff options
| author | Helmut Schaa <helmut.schaa@googlemail.com> | 2015-09-09 09:46:32 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2015-09-29 15:56:33 +0200 |
| commit | 35afa588624c4f9e19a0edfbb51769b59c90bb0d (patch) | |
| tree | 49f7cb4995e98ef153d51068fccda7e5b3ccd852 /net/mac80211/tx.c | |
| parent | 5359d112dcb081fd7a5f2de287fa995f6ba0800c (diff) | |
| download | linux-35afa588624c4f9e19a0edfbb51769b59c90bb0d.tar.bz2 | |
mac80211: Copy tx'ed beacons to monitor mode
When debugging wireless powersave issues on the AP side it's quite helpful
to see our own beacons that are transmitted by the hardware/driver. However,
this is not that easy since beacons don't pass through the regular TX queues.
Preferably drivers would call ieee80211_tx_status also for tx'ed beacons
but that's not always possible. Hence, just send a copy of each beacon
generated by ieee80211_beacon_get_tim to monitor devices when they are
getting fetched by the driver.
Also add a HW flag IEEE80211_HW_BEACON_TX_STATUS that can be used by
drivers to indicate that they report TX status for beacons.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
(with a fix from Christian Lamparted rolled in)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/tx.c')
| -rw-r--r-- | net/mac80211/tx.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 84e0e8c7fb23..73540723be37 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -3512,6 +3512,12 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, { struct ieee80211_mutable_offsets offs = {}; struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); + struct sk_buff *copy; + struct ieee80211_supported_band *sband; + int shift; + + if (!bcn) + return bcn; if (tim_offset) *tim_offset = offs.tim_offset; @@ -3519,6 +3525,19 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, if (tim_length) *tim_length = offs.tim_length; + if (ieee80211_hw_check(hw, BEACON_TX_STATUS) || + !hw_to_local(hw)->monitors) + return bcn; + + /* send a copy to monitor interfaces */ + copy = skb_copy(bcn, GFP_ATOMIC); + if (!copy) + return bcn; + + shift = ieee80211_vif_get_shift(vif); + sband = hw->wiphy->bands[ieee80211_get_sdata_band(vif_to_sdata(vif))]; + ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false); + return bcn; } EXPORT_SYMBOL(ieee80211_beacon_get_tim); |