linux.git/net/mac80211/util.c, branch v4.3

mac80211: clear local->suspended before calling drv_resume()

2015-07-17T13:40:46+00:00

Currently, mac80211 calls drv_resume() on wowlan resume,
but drops any incoming frame until local->suspended is
cleared later on.

This requires the low-level driver to support a new state,
in which it is expected to fully work (as it was resumed)
but not passing rx frames yet (as they will be dropped).

iwlwifi (and probably other drivers as well) has issues
supporting such mode.

Since in the wowlan case we already short-circuit
ieee80211_reconfig, there's nothing that prevents us from
clearing local->suspend before calling drv_resume(),
and letting the low-level driver work normally.

Signed-off-by: Eliad Peller 
Signed-off-by: Emmanuel Grumbach 
Signed-off-by: Johannes Berg

mac80211: clear local->in_reconfig on reconfig error

2015-07-17T13:38:10+00:00

If reconfiguration fails, local->in_reconfig is never
cleaned, resulting in rx frames being dropped next
time the device is started.

Signed-off-by: Eliad Peller 
Signed-off-by: Emmanuel Grumbach 
Signed-off-by: Johannes Berg

mac80211: allow passing NULL to ieee80211_vif_to_wdev()

2015-07-17T13:38:09+00:00

Simply return NULL in this case, instead of crashing. This can
simplify callers that would otherwise have to check for this
explicitly.

Signed-off-by: Johannes Berg

mac80211: move ieee80211_get_bssid into RX file

2015-07-17T13:37:57+00:00

This function is only used in the RX code, so moving it into
that file gives the compiler better optimisation possibilities
and also allows us to remove the check for short frames (which
in the RX path cannot happen, but as a generic utility needed
to be checked.)

Signed-off-by: Johannes Berg

mac80211: convert HW flags to unsigned long bitmap

2015-06-10T14:05:36+00:00

As we're running out of hardware capability flags pretty quickly,
convert them to use the regular test_bit() style unsigned long
bitmaps.

This introduces a number of helper functions/macros to set and to
test the bits, along with new debugfs code.

The occurrences of an explicit __clear_bit() are intentional, the
drivers were never supposed to change their supported bits on the
fly. We should investigate changing this to be a per-frame flag.

Signed-off-by: Johannes Berg

mac80211: fix AP_VLAN crypto tailroom calculation

2015-05-20T13:10:11+00:00

Some splats I was seeing:

 (a) WARNING: CPU: 1 PID: 0 at /devel/src/linux/net/mac80211/wep.c:102 ieee80211_wep_add_iv
 (b) WARNING: CPU: 1 PID: 0 at /devel/src/linux/net/mac80211/wpa.c:73 ieee80211_tx_h_michael_mic_add
 (c) WARNING: CPU: 3 PID: 0 at /devel/src/linux/net/mac80211/wpa.c:433 ieee80211_crypto_ccmp_encrypt

I've seen (a) and (b) with ath9k hw crypto and (c)
with ath9k sw crypto. All of them were related to
insufficient skb tailroom and I was able to
trigger these with ping6 program.

AP_VLANs may inherit crypto keys from parent AP.
This wasn't considered and yielded problems in
some setups resulting in inability to transmit
data because mac80211 wouldn't resize skbs when
necessary and subsequently drop some packets due
to insufficient tailroom.

For efficiency purposes don't inspect both AP_VLAN
and AP sdata looking for tailroom counter. Instead
update AP_VLAN tailroom counters whenever their
master AP tailroom counter changes.

Signed-off-by: Michal Kazior 
Signed-off-by: Johannes Berg

cfg80211: move IE split utilities here from mac80211

2015-04-07T11:56:41+00:00

As the next patch will require the IE splitting utility functions
in cfg80211, move them there from mac80211.

Signed-off-by: Johannes Berg

mac80211: add an intermediate software queue implementation

2015-04-01T18:44:34+00:00

This allows drivers to request per-vif and per-sta-tid queues from which
they can pull frames. This makes it easier to keep the hardware queues
short, and to improve fairness between clients and vifs.

The task of scheduling packet transmission is left up to the driver -
queueing is controlled by mac80211. Drivers can only dequeue packets by
calling ieee80211_tx_dequeue. This makes it possible to add active queue
management later without changing drivers using this code.

This can also be used as a starting point to implement A-MSDU
aggregation in a way that does not add artificially induced latency.

Signed-off-by: Felix Fietkau 
[resolved minor context conflict, minor changes, endian annotations]
Signed-off-by: Johannes Berg

Merge tag 'mac80211-next-for-davem-2015-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

2015-03-31T20:39:04+00:00

Johannes Berg says:

====================
Lots of updates for net-next; along with the usual flurry
of small fixes, cleanups and internal features we have:
 * VHT support for TDLS and IBSS (conditional on drivers though)
 * first TX performance improvements (the biggest will come later)
 * many suspend/resume (race) fixes
 * name_assign_type support from Tom Gundersen
====================

Signed-off-by: David S. Miller

mac80211: add VHT support for IBSS

2015-03-30T08:48:26+00:00

Add VHT support for IBSS. Drivers could activate
this feature by setting NL80211_EXT_FEATURE_VHT_IBSS
flag.

Signed-off-by: Janusz Dziedzic 
Signed-off-by: Johannes Berg