linux-toradex.git/net/wireless/reg.h, branch v3.9-rc2

regulatory: use RCU to protect global and wiphy regdomains

2013-01-03T12:01:29+00:00

To simplify the locking and not require cfg80211_mutex
(which nl80211 uses to access the global regdomain) and
also to make it possible for drivers to access their
wiphy->regd safely, use RCU to protect these pointers.

Acked-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg

regulatory: fix reg_is_valid_request handling

2013-01-03T12:01:28+00:00

There's a bug with the world regulatory domain, it
can be updated any time which is different from all
other regdomains that can only be updated once after
a request for them. Fix this by adding a check for
"processed" to the reg_is_valid_request() function
and clear that when doing a request.

While looking at this I also found another locking
bug, last_request is protected by the reg_mutex not
the cfg80211_mutex so the code in nl80211 is racy.
Remove that code as it only tries to prevent an
allocation in an error case, which isn't necessary.
Then the function can also become static and locking
in nl80211 can have a smaller scope.

Also change __set_regdom() to do the checks earlier
and not different for world/other regdomains.

Acked-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg

regulatory: code cleanup

2013-01-03T12:01:22+00:00

Clean up various things like indentation, extra
parentheses, too many/few line breaks, etc.

Acked-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg

cfg80211: fix BSS struct IE access races

2012-11-30T12:42:20+00:00

When a BSS struct is updated, the IEs are currently
overwritten or freed. This can lead to races if some
other CPU is accessing the BSS struct and using the
IEs concurrently.

Fix this by always allocating the IEs in a new struct
that holds the data and length and protecting access
to this new struct with RCU.

Signed-off-by: Johannes Berg

cfg80211: make regulatory_update() static

2012-07-17T10:16:40+00:00

Now that we have wiphy_regulatory_register() we can
tuck away the core's regulatory_update() call there
and make it static.

Signed-off-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg

cfg80211: rename reg_device_remove() to wiphy_regulatory_deregister()

2012-07-17T10:16:39+00:00

This makes it clearer what we're doing. This now makes a bit
more sense given that regardless of the wiphy if the cell
base station hint feature is supported we will be modifying the
way the regulatory core behaves.

Signed-off-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg

cfg80211: add cellular base station regulatory hint support

2012-07-17T10:16:39+00:00

Cellular base stations can provide hints to cfg80211 about
where they think we are. This can be done for example on
a cell phone. To enable these hints we simply allow them
through as user regulatory hints but we allow userspace
to clasify the hint as either coming directly from the
user or coming from a cellular base station. This option
is only available when you enable
CONFIG_CFG80211_CERTIFICATION_ONUS.

The base station hints themselves will not be processed
by the core unless at least one device on the system
supports this feature.

Signed-off-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg

cfg80211: relicense reg.c reg.h and genregdb.awk to ISC

2012-01-04T19:30:41+00:00

Following the tradition we have had with ath5k, ath9k, CRDA,
wireless-regdb I'd like to license this code under the permissive ISC
license for the code sharing purposes with other OSes, it'd sure be nice
to help the landscape in this area. Although I am %82.89 owner of the
regulatory code I have asked every contributor to the regulatory code
and have receieved positive Acked-bys from everyone except two deceased
entities:

 o Frans Pop RIP 2010 [0]
	- Frans Pop 
	- Frans Pop 
 o Nokia     RIP February, 11, 2011 [1], [2]
	- ext-yuri.ershov@nokia.com
	- kalle.valo@nokia.com

Frans Pop's contribution was a simple patch 55f98938, titled,
"wireless: remove trailing space in messages" which just add a \n
to some printk lines. I'm going to treat these additions as
uncopyrightable.

As for the contributions made by employees on behalf of Nokia
my contact point was Petri Karhula  but
after one month he noted he had not been able to get traction from the
legal department on this request, as such it I proceeded by replacing
their contributions in previous patches.

The end goal is to help a clean rewrite that starts in userspace
that is shared under ISC license which currently is taking place with
the regulatory simulator [3].

[0] http://lists.debian.org/debian-devel/2011/12/msg00263.html
[1] http://press.nokia.com/2011/02/11/nokia-outlines-new-strategy-introduces-new-leadership-operational-structure/
[2] http://NokiaPlanB.com
[3] git://github.com/mcgrof/regsim.git

Acked-by: Thadeu Lima de Souza Cascardo 
Acked-by: Dan Carpenter 
Acked-by: Mihai Moldovan 
Acked-by: Uwe Kleine-König 
Acked-by: Sven Neumann 
Acked-by: Johannes Berg 
Acked-by: Tomas Winkler 
Acked-by: Tony Vroon 
Acked-by: Pavel Roskin 
Acked-by: Bob Copeland 
Acked-by: Lucas De Marchi 
Acked-by: Pat Erley 
Acked-by: Tejun Heo 
Acked-by: John W. Linville 
Acked-by: Chris Wright 
Acked-by: Joe Perches 
Acked-by: Paul Gortmaker 
Acked-by: John Gordon 
Acked-by: Simon Barber 
Acked-by: Rajkumar Manoharan 
Acked-by: Jiri Benc 
Acked-by: Bruno Randolf 
Acked-by: Scott James Remnant 
Acked-by: Roel Kluin 
Signed-off-by: Luis R. Rodriguez 
Signed-off-by: John W. Linville

cfg80211: process regulatory DFS region for countries

2011-11-21T21:20:41+00:00

The wireless-regdb now has support for mapping a country to
one DFS region. CRDA sends this to us now so process it
so we can provide that hint to drivers. This will later be
used by code for processing DFS in a way that meets the
criteria for the DFS region the country belongs to.

Signed-off-by: Luis R. Rodriguez 
Signed-off-by: John W. Linville

cfg80211: hold reg_mutex when updating regulatory

2011-09-14T17:26:39+00:00

The function wiphy_update_regulatory() uses the static variable
last_request and thus needs to be called with reg_mutex held.
This is the case for all users in reg.c, but the function was
exported for use by wiphy_register(), from where it is called
without the lock being held.

Fix this by making wiphy_update_regulatory() private and introducing
regulatory_update() as a wrapper that acquires and holds the lock.

Signed-off-by: Sven Neumann 
Cc: John W. Linville 
Cc: Luis R. Rodriguez 
Cc: Daniel Mack 
Cc: linux-wireless@vger.kernel.org
Acked-by:  Luis R. Rodriguez 
Signed-off-by: John W. Linville