linux.git/net/mac80211/debugfs_sta.c, branch v4.13

mac80211: Dynamically set CoDel parameters per station

2017-05-17T14:03:40+00:00

CoDel can be too aggressive if a station sends at a very low rate,
leading reduced throughput. This gets worse the more stations are
present, as each station gets more bursty the longer the round-robin
scheduling between stations takes.

This adds dynamic adjustment of CoDel parameters per station. It uses
the rate selection information to estimate throughput and sets more
lenient CoDel parameters if the estimated throughput is below a
threshold (modified by the number of active stations).

A new callback is added that drivers can use to notify mac80211 about
changes in expected throughput, so the same adjustment can be made for
cards that implement rate control in firmware. Drivers that don't use
this will just get the default parameters.

Signed-off-by: Toke Høiland-Jørgensen 
[remove currently unnecessary EXPORT_SYMBOL, fix kernel-doc, remove
inline annotation]
Signed-off-by: Johannes Berg

mac80211: add back lost debugfs files

2017-02-07T09:40:50+00:00

Somehow these files were never present or lost, but the code
is there and they seem somewhat useful, so add them back.

Signed-off-by: Johannes Berg

mac80211: improve RX aggregation data in debugfs

2016-10-19T10:12:11+00:00

When the driver sets the SUPPORTS_REORDERING_BUFFER hardware flag,
the debugfs data for RX aggregation sessions won't even indicate
that a session is open. Since the previous fix to store the dialog
token separately, we can indicate that it's open and add the token
so that there's at least some data (ssn is not available.)

Signed-off-by: Johannes Berg

mac80211: fix tid_agg_rx NULL dereference

2016-10-19T10:11:49+00:00

On drivers setting the SUPPORTS_REORDERING_BUFFER hardware flag,
we crash when the peer sends an AddBA request while we already
have a session open on the seame TID; this is because on those
drivers, the tid_agg_rx is left NULL even though the session is
valid, and the agg_session_valid bit is set.

To fix this, store the dialog tokens outside the tid_agg_rx to
be able to compare them to the received AddBA request.

Fixes: f89e07d4cf26 ("mac80211: agg-rx: refuse ADDBA Request with timeout update")
Reported-by: Emmanuel Grumbach 
Signed-off-by: Johannes Berg

mac80211: remove sta_remove_debugfs driver callback

2016-09-15T14:46:19+00:00

No drivers implement this, relying either on the recursive
directory removal to remove their debugfs, or not having any
to start with. Remove the dead driver callback.

Signed-off-by: Johannes Berg

mac80211: Re-structure aqm debugfs output and keep CoDel stats per txq

2016-09-13T06:20:16+00:00

Currently the 'aqm' stats in mac80211 only keeps overlimit drop stats,
not CoDel stats. This moves the CoDel stats into the txqi structure to
keep them per txq in order to show them in debugfs.

In addition, the aqm debugfs output is restructured by splitting it up
into three files: One global per phy, one per netdev and one per
station, in the appropriate directories. The files are all called aqm,
and are only created if the driver supports the wake_tx_queue op (rather
than emitting an error on open as previously).

Signed-off-by: Toke Høiland-Jørgensen 
Signed-off-by: Johannes Berg

mac80211: add vht cap decode to debugfs

2016-05-31T11:07:54+00:00

This makes it a lot easier to understand the capabilities used
by the station:

VHT supported
cap: 0x300819b2
		MAX-MPDU-11454
		80Mhz
		RXLDPC
		SHORT-GI-80
		TXSTBC
		RXSTBC_1
		SU-BEAMFORMER-CAPABLE
		SU-BEAMFORMEE-CAPABLE
		BEAMFORMEE-STS: 0x0
		SOUNDING-DIMENSIONS: 0x0
		MU-BEAMFORMER-CAPABLE
		MPDU-LENGTH-EXPONENT: 0x0
		LINK-ADAPTATION-VHT-MRQ-MFB: 0x0
		RX-ANTENNA-PATTERN
		TX-ANTENNA-PATTERN
RX MCS: fffe
TX MCS: fffe

Signed-off-by: Ben Greear 
Signed-off-by: Johannes Berg

mac80211: clean up station flags debugfs

2016-04-05T10:12:26+00:00

Avoid the really strange %s%s%s expression, use an array
of flag names and check that all flags are present.

Signed-off-by: Johannes Berg

mac80211: remove sta_info debugfs sub-struct

2016-04-05T09:59:05+00:00

Since the previous patch, the struct only has a single member,
so remove the struct and leave just the single member.

Signed-off-by: Johannes Berg

mac80211: Remove unused variable in per STA debugfs struct

2016-04-05T09:57:11+00:00

Remove unused variable in per STA debugfs structure, 'commit 34e895075e21
("mac80211: allow station add/remove to sleep")' removed the only user of
'add_has_run'.

Signed-off-by: Mohammed Shafi Shajakhan 
Signed-off-by: Johannes Berg