linux-stable.git/net/wireless/util.c, branch v5.8

nl80211: really allow client-only BIGTK support

2020-05-31T09:26:05+00:00

My previous commit here was wrong, it didn't check the new
flag in two necessary places, so things didn't work. Fix that.

Fixes: 155d7c733807 ("nl80211: allow client-only BIGTK support")
Link: https://lore.kernel.org/r/20200528213443.993f108e96ca.I0086ae42d672379380d04ac5effb2f3d5135731b@changeid
Signed-off-by: Johannes Berg

cfg80211: adapt to new channelization of the 6GHz band

2020-05-31T09:26:03+00:00

The 6GHz band does not have regulatory approval yet, but things are
moving forward. However, that has led to a change in the channelization
of the 6GHz band which has been accepted in the 11ax specification. It
also fixes a missing MHZ_TO_KHZ() macro for 6GHz channels while at it.

This change is primarily thrown in to discuss how to deal with it.
I noticed ath11k adding 6G support with old channelization and ditto
for iw. It probably involves changes in hostapd as well.

Cc: Pradeep Kumar Chitrapu 
Cc: Jouni Malinen 
Signed-off-by: Arend van Spriel 
Link: https://lore.kernel.org/r/edf07cdd-ad15-4012-3afd-d8b961a80b69@broadcom.com
Signed-off-by: Johannes Berg

cfg80211: fix 6 GHz frequencies to kHz

2020-05-31T09:25:59+00:00

The updates to change to kHz frequencies and the 6 GHz
additions evidently overlapped (or rather, I didn't see
it when applying the latter), so the 6 GHz is broken.
Fix this.

Fixes: 934f4c7dd3a5 ("cfg80211: express channels with a KHz component")
Link: https://lore.kernel.org/r/20200529140425.1bf824f6911b.I4a1174916b8f5965af4366999eb9ffc7a0347470@changeid
Signed-off-by: Johannes Berg

cfg80211: express channels with a KHz component

2020-04-24T10:33:43+00:00

Some bands (S1G) define channels centered on a non-integer
MHz. Give ieee80211_channel and cfg80211_chan_def a
freq_offset component where the final frequency can be
expressed as:

MHZ_TO_KHZ(chan->center_freq) + chan->freq_offset;

Also provide some helper functions to do the frequency
conversion and test for equality.

Retain the existing interface to frequency and channel
conversion helpers, and expose new ones which handle
frequencies in units of KHz.

Some internal functions (net/wireless/chan.c) pass around
a frequency value. Convert these to units of KHz.

mesh, ibss, wext, etc. are currently ignored.

Signed-off-by: Thomas Pedersen 
Link: https://lore.kernel.org/r/20200402011810.22947-3-thomas@adapt-ip.com
Signed-off-by: Johannes Berg

mac80211: implement Operating Mode Notification extended NSS support

2020-04-24T10:33:42+00:00

Somehow we missed this for a long time, but similar to the extended
NSS support in VHT capabilities, we need to have this in Operating
Mode notification.

Implement it by
 * parsing the 160/80+80 bit there and setting the bandwidth
   appropriately
 * having callers of ieee80211_get_vht_max_nss() pass in the current
   max NSS value as received in the operating mode notification in
   order to modify it appropriately depending on the extended NSS
   bits.

This updates all drivers that use it, i.e. only iwlwifi/mvm.

Signed-off-by: Johannes Berg 
Signed-off-by: Luca Coelho 
Link: https://lore.kernel.org/r/iwlwifi.20200326150855.098483728cfa.I4e8c25d3288441759c2793247197229f0696a37d@changeid
Signed-off-by: Johannes Berg

Merge tag 'mac80211-next-for-net-next-2020-02-24' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

2020-02-24T23:41:54+00:00

Johannes Berg says:

====================
A new set of changes:
 * lots of small documentation fixes, from Jérôme Pouiller
 * beacon protection (BIGTK) support from Jouni Malinen
 * some initial code for TID configuration, from Tamizh chelvam
 * I reverted some new API before it's actually used, because
   it's wrong to mix controlled port and preauth
 * a few other cleanups/fixes
====================

Signed-off-by: David S. Miller

cfg80211: Support key configuration for Beacon protection (BIGTK)

2020-02-24T09:35:48+00:00

IEEE P802.11-REVmd/D3.0 adds support for protecting Beacon frames using
a new set of keys (BIGTK; key index 6..7) similarly to the way
group-addressed Robust Management frames are protected (IGTK; key index
4..5). Extend cfg80211 and nl80211 to allow the new BIGTK to be
configured. Add an extended feature flag to indicate driver support for
the new key index values to avoid array overflows in driver
implementations and also to indicate to user space when this
functionality is available.

Signed-off-by: Jouni Malinen 
Link: https://lore.kernel.org/r/20200222132548.20835-2-jouni@codeaurora.org
Signed-off-by: Johannes Berg

net: use netif_is_bridge_port() to check for IFF_BRIDGE_PORT

2020-02-20T18:10:32+00:00

Trivial cleanup, so that all bridge port-specific code can be found in
one go.

CC: Johannes Berg 
CC: Roopa Prabhu 
CC: Nikolay Aleksandrov 
Signed-off-by: Julian Wiedmann 
Reviewed-by: Nikolay Aleksandrov 
Signed-off-by: David S. Miller

cfg80211: fix page refcount issue in A-MSDU decap

2020-01-15T08:53:35+00:00

The fragments attached to a skb can be part of a compound page. In that case,
page_ref_inc will increment the refcount for the wrong page. Fix this by
using get_page instead, which calls page_ref_inc on the compound head and
also checks for overflow.

Fixes: 2b67f944f88c ("cfg80211: reuse existing page fragments in A-MSDU rx")
Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau 
Link: https://lore.kernel.org/r/20200113182107.20461-1-nbd@nbd.name
Signed-off-by: Johannes Berg

nl80211: Disallow setting of HT for channel 14

2019-10-30T09:07:22+00:00

This patch disables setting of HT20 and more for channel 14 because
the channel is only for IEEE 802.11b.

The patch for net/wireless/util.c was unit-tested.

The patch for net/wireless/chan.c was tested with iw command.

Before this patch.
$ sudo iw dev  set channel 14 HT20
$

After this patch.
$ sudo iw dev  set channel 14 HT20
kernel reports: invalid channel definition
command failed: Invalid argument (-22)
$

Signed-off-by: Masashi Honma 
Link: https://lore.kernel.org/r/20191021075045.2719-1-masashi.honma@gmail.com
[clean up the code, use != instead of equivalent >]
Signed-off-by: Johannes Berg