linux-toradex.git/net/mac80211/debugfs_sta.c, branch v2.6.33.1

mac80211: add per-station HT capability file

2009-11-19T16:09:08+00:00

This is sometimes useful to debug HT issues
as it shows what exactly the stack thinks
the peer supports.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: async station powersave handling

2009-11-06T21:49:10+00:00

Some devices require that all frames to a station
are flushed when that station goes into powersave
mode before being able to send frames to that
station again when it wakes up or polls -- all in
order to avoid reordering and too many or too few
frames being sent to the station when it polls.

Normally, this is the case unless the station
goes to sleep and wakes up very quickly again.
But in that case, frames for it may be pending
on the hardware queues, and thus races could
happen in the case of multiple hardware queues
used for QoS/WMM. Normally this isn't a problem,
but with the iwlwifi mechanism we need to make
sure the race doesn't happen.

This makes mac80211 able to cope with the race
with driver help by a new WLAN_STA_PS_DRIVER
per-station flag that can be controlled by the
driver and tells mac80211 whether it can transmit
frames or not. This flag must be set according to
very specific rules outlined in the documentation
for the function that controls it.

When we buffer new frames for the station, we
normally set the TIM bit right away, but while
the driver has blocked transmission to that sta
we need to avoid that as well since we cannot
respond to the station if it wakes up due to the
TIM bit. Once the driver unblocks, we can set
the TIM bit.

Similarly, when the station just wakes up, we
need to wait until all other frames are flushed
before we can transmit frames to that station,
so the same applies here, we need to wait for
the driver to give the OK.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: deprecate qual value

2009-10-30T20:50:39+00:00

This value is unused by mac80211, because it was only
be used by wireless extensions, and turned out to not
be useful there because the quality value needs to be
comparable between scan results and the current value
which is impossible when the qual value is calculated
taking into account noise, for example.

Since it is unused anyway, this patch deprecates it
in the hope that drivers will remove their sometimes
quite expensive calculations of the value.

I'm open to actual uses of the value, but the best
way of using it seems to be what the Intel drivers do
which should probably be generalised if we have noise
values from the hardware.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville

cfg80211/mac80211: use debugfs_remove_recursive

2009-10-30T20:49:18+00:00

We can save a lot of code and pointers in the structs
by using debugfs_remove_recursive().

First, change cfg80211 to use debugfs_remove_recursive()
so that drivers do not need to clean up any files they
added to the per-wiphy debugfs (if and only if they are
ok to be accessed until after wiphy_unregister!).

Then also make mac80211 use debugfs_remove_recursive()
where necessary -- it need not remove per-wiphy files
as cfg80211 now removes those, but netdev etc. files
still need to be handled but can now be removed without
needing struct dentry pointers to all of them.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: improve per-sta debugfs

2009-07-10T18:57:54+00:00

We had code for a number of files, that we didn't publish
in debugfs, fix that. Also make the agg_status file layout
more readable and add more information to it.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: 802.11w - STA flag for MFP

2009-01-29T21:00:00+00:00

Add flags for setting STA entries and struct ieee80211_if_sta to
indicate whether management frame protection (MFP) is used.

Signed-off-by: Jouni Malinen 
Acked-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: minor code cleanups

2008-10-31T22:05:59+00:00

Nothing very interesting, some checkpatch inspired stuff,
some other things.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: remove aggregation status write support from debugfs

2008-10-31T22:05:57+00:00

This code uses static variables and thus cannot be kept.

Signed-off-by: Johannes Berg 
Signed-off-by: John W. Linville

mac80211: convert to %pM away from print_mac

2008-10-28T00:06:16+00:00

Also remove a few stray DECLARE_MAC_BUF that were no longer
used at all.

Signed-off-by: Johannes Berg 
Signed-off-by: David S. Miller

mac80211: fix debugfs lockup

2008-10-15T00:46:41+00:00

When debugfs_create_dir fails, sta_info_debugfs_add_work will not
terminate because it will find the same station again and again.
This is possible whenever debugfs fails for whatever reason; one
reason is a race condition in mac80211, unfortunately we cannot
do much about it, so just document it, it just means some station
may be missing from debugfs.

Signed-off-by: Johannes Berg 
Cc: Robin Holt 
Signed-off-by: John W. Linville