As before with HE, the data needs to be provided by the
driver in the skb head, since there's not enough space
in the skb CB.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NShaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Make it possibly for drivers to adjust the default skb_pacing_shift
by storing it in the hardware struct.
Signed-off-by: NWen Gong <wgong@codeaurora.org>
[adjust commit log, move & adjust comment]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

When taking VHT capabilities for a station, copy the new
fields if we support them as a transmitter. Also adjust
the maximum bandwidth the station supports appropriately.

Also, since it was missing, copy tx_highest and rx_highest.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

With newer VHT implementations, it's necessary to look at the
HT operation's CCFS2 field to identify the actual bandwidth
used.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Depending on whether or not rate control supports selecting
rates depending on the bandwidth, we can use VHT extended
NSS support. In essence, this is dot11VHTExtendedNSSBWCapable
from the spec, since depending on that we'll need to parse
the bandwidth.

If needed, also set/clear the VHT Capability Element bit for
this capability so that we don't advertise it erroneously or
don't advertise it when we actually use it.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In AP mode, If AP advertises HE capabilities, set to true
bss_conf::he_supported so that the Driver knows about it.
Signed-off-by: NShaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Some drivers may want to also use the TXQ abstraction with
non-data packets that need powersave buffering, so add a
hardware flag to allow this.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Instead of open-coding the equivalent of le16_encode_bits(),
just use that.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

These checks aren't necessary, cfg80211 never passes NULL.
Some static checkers complain about the missing checks on
the next line, but really the NULL checks are unnecessary.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Export HE capabilities information via debugfs, similar to HT & VHT.
Signed-off-by: NIdo Yariv <idox.yariv@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

When tracing is enabled, all the debug messages are recorded and must
not exceed MAX_MSG_LEN (100) columns. Longer debug messages grant the
user with:

WARNING: CPU: 3 PID: 32642 at /tmp/wifi-core-20180806094828/src/iwlwifi-stack-dev/net/mac80211/./trace_msg.h:32 trace_event_raw_event_mac80211_msg_event+0xab/0xc0 [mac80211]
Workqueue: phy1 ieee80211_iface_work [mac80211]
 RIP: 0010:trace_event_raw_event_mac80211_msg_event+0xab/0xc0 [mac80211]
 Call Trace:
  __sdata_dbg+0xbd/0x120 [mac80211]
  ieee80211_ibss_rx_queued_mgmt+0x15f/0x510 [mac80211]
  ieee80211_iface_work+0x21d/0x320 [mac80211]
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

If the driver fails to properly prepare for the channel
switch, mac80211 will disconnect. If the CSA IE had mode
set to 1, it means that the clients are not allowed to send
any Tx on the current channel, and that includes the
deauthentication frame.

Make sure that we don't send the deauthentication frame in
this case.

In iwlwifi, this caused a failure to flush queues since the
firmware already closed the queues after having parsed the
CSA IE. Then mac80211 would wait until the deauthentication
frame would go out (drv_flush(drop=false)) and that would
never happen.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

When performing a channel switch flow for a managed interface, the
flow did not update the bandwidth of the AP station and the rate
scale algorithm. In case of a channel width downgrade, this would
result with the rate scale algorithm using a bandwidth that does not
match the interface channel configuration.

Fix this by updating the AP station bandwidth and rate scaling algorithm
before the actual channel change in case of a bandwidth downgrade, or
after the actual channel change in case of a bandwidth upgrade.
Signed-off-by: NIlan Peer <ilan.peer@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

We hit a problem with iwlwifi that was caused by a bug in
mac80211. A bug in iwlwifi caused the firwmare to crash in
certain cases in channel switch. Because of that bug,
drv_pre_channel_switch would fail and trigger the restart
flow.
Now we had the hw restart worker which runs on the system's
workqueue and the csa_connection_drop_work worker that runs
on mac80211's workqueue that can run together. This is
obviously problematic since the restart work wants to
reconfigure the connection, while the csa_connection_drop_work
worker does the exact opposite: it tries to disconnect.

Fix this by cancelling the csa_connection_drop_work worker
in the restart worker.

Note that this can sound racy: we could have:

driver   iface_work   CSA_work   restart_work
+++++++++++++++++++++++++++++++++++++++++++++
              |
 <--drv_cs ---|
<FW CRASH!>
-CS FAILED-->
              |                       |
              |                 cancel_work(CSA)
           schedule                   |
           CSA work                   |
                         |            |
                        Race between those 2

But this is not possible because we flush the workqueue
in the restart worker before we cancel the CSA worker.
That would be bullet proof if we could guarantee that
we schedule the CSA worker only from the iface_work
which runs on the workqueue (and not on the system's
workqueue), but unfortunately we do have an instance
in which we schedule the CSA work outside the context
of the workqueue (ieee80211_chswitch_done).

Note also that we should probably cancel other workers
like beacon_connection_loss_work and possibly others
for different types of interfaces, at the very least,
IBSS should suffer from the exact same problem, but for
now, do the minimum to fix the actual bug that was actually
experienced and reproduced.
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In commit 9236c4523e5b ("mac80211: limit wmm params to comply
with ETSI requirements"), we have limited the WMM parameters to
comply with 802.11 and ETSI standard.  Mistakenly the TXOP value
was caluclated wrong.  Fix it by taking the minimum between
802.11 to ETSI to make sure we are not violating both.

Fixes: e552af05 ("mac80211: limit wmm params to comply with ETSI requirements")
Signed-off-by: NHaim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Initialize 'n' to 2 in order to take into account also the first
packet in the estimation of max_subframe limit for a given A-MSDU
since frag_tail pointer is NULL when ieee80211_amsdu_aggregate
routine analyzes the second frame.

Fixes: 6e0456b5 ("mac80211: add A-MSDU tx support")
Signed-off-by: NLorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

In the error path of changing the SKB headroom of the second
A-MSDU subframe, we would not account for the already-changed
length of the first frame that just got converted to be in
A-MSDU format and thus is a bit longer now.

Fix this by doing the necessary accounting.

It would be possible to reorder the operations, but that would
make the code more complex (to calculate the necessary pad),
and the headroom expansion should not fail frequently enough
to make that worthwhile.

Fixes: 6e0456b5 ("mac80211: add A-MSDU tx support")
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Acked-by: NLorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Do not start to aggregate packets in a A-MSDU frame (converting the
first subframe to A-MSDU, adding the header) if max_tx_fragments or
max_amsdu_subframes limits are already exceeded by it. In particular,
this happens when drivers set the limit to 1 to avoid A-MSDUs at all.
Signed-off-by: NLorenzo Bianconi <lorenzo.bianconi@redhat.com>
[reword commit message to be more precise]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

When building building AMSDU from non-linear SKB, we hit a
kernel panic when trying to push the padding to the tail.
Instead, put the padding at the head of the next subframe.
This also fixes the A-MSDU subframes to not have the padding
accounted in the length field and not have pad at all for
the last subframe, both required by the spec.

Fixes: 6e0456b5 ("mac80211: add A-MSDU tx support")
Signed-off-by: NSara Sharon <sara.sharon@intel.com>
Reviewed-by: NLorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

IEEE 802.11-2016 14.10.8.3 HWMP sequence numbering says:
If it is a target mesh STA, it shall update its own HWMP SN to
maximum (current HWMP SN, target HWMP SN in the PREQ element) + 1
immediately before it generates a PREP element in response to a
PREQ element.
Signed-off-by: NYuan-Chi Pang <fu3mo6goo@gmail.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Modify the API to include all ACK frames in average ACK
signal strength reporting, not just ACKs for data frames.
Make exposing the data conditional on implementing the
extended feature flag.

This is how it was really implemented in mac80211, update
the code there to use the new defines and clean up some of
the setting code.

Keep nl80211.h source compatibility by keeping the old names.
Signed-off-by: NBalaji Pothunoori <bpothuno@codeaurora.org>
[rewrite commit log, change compatibility to be old=new
 instead of the other way around, update kernel-doc,
 roll in mac80211 changes, make mac80211 depend on valid
 bit instead of HW flag]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The current mac80211 WDS (4-address mode) can be used to cover most of the
Multi-AP requirements for Data frames per the WFA Multi-AP Specification v1.0.
When configuring AP/STA interfaces in 4-address mode, they are able to function
as fronthaul AP/backhaul STA of Multi-AP device complying below
Tx, Rx requirements except one missing STA Rx requirement added by this patch.

Multi-AP specification section 14.1 describes the following requirements:

Transmitter requirements
------------------------
1. Fronthaul AP
        i) When DA!=RA of backhaul STA, must use 4-address format
        ii) When DA==RA of backhaul STA, shall use either 3-address
            or 4-address format with RA updated with STA MAC

            (mac80211 support 4-address format via AP/VLAN interface)

2. Backhaul STA
        i) When SA!=TA of backhaul STA, must use 4-address format
        ii) When SA==TA of backhaul STA, shall use either 3-address
            or 4-address format with RA updated with AP MAC

            (mac80211 support 4-address format via use_4addr)

Receiver requirements
---------------------
1. Fronthaul AP
        i) When SA!=TA of backhaul STA, must support receiving 4-address
           format frames
        ii) When SA==TA of backhaul STA, must support receiving both
            3-address and 4-address format frames

            (mac80211 support both 3-addr & 4-addr via AP/VLAN interface)

2. Backhaul STA
        i) When DA!=RA of backhaul STA, must support receiving 4-address
           format frames
        ii) When DA==RA of backhaul STA,  must support receiving both
            3-address and 4-address format frames

            (mac80211 support only receiving 4-address format via
             use_4addr)

This patch addresses the above Rx requirement (ii) for backhaul STA to receive
unicast (DA==RA) 3-address frames in addition to 4-address frames.

The current design doesn't accept 3-address frames when configured in 4-address
mode (use_4addr). Hence add a check to allow 3-address frames when DA==RA of
backhaul STA (adhering to Table 9-26 of IEEE Std 802.11™-2016).

This case was tested with a bridged station interface when associated with
a non-mac80211 based vendor AP implementation using 3-address frames for WDS.

STA was able to support the Multi-AP Rx requirement when DA==RA. No issues,
no loops seen when tested with mac80211 based AP as well.

Verified and confirmed all other Tx and Rx requirements of AP and STA for
Multi-AP respectively. They all work using the current mac80211-WDS design.
Signed-off-by: NSathishkumar Muruganandam <murugana@codeaurora.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Sometimes, it is required to stop the transmissions momentarily and
resume it later; stopping the txqs becomes very critical in scenarios where
the packet transmission has to be ceased completely. For example, during
the hardware restart, during off channel operations,
when initiating CSA(upon detecting a radar on the DFS channel), etc.

The TX queue stop/start logic in mac80211 works well in stopping the TX
when drivers make use of netdev queues, i.e, when Qdiscs in network layer
take care of traffic scheduling. Since the devices implementing
wake_tx_queue can run without Qdiscs, packets will be handed to mac80211
directly without queueing them in the netdev queues.

Also, mac80211 does not invoke any of the
netif_stop_*/netif_wake_* APIs if wake_tx_queue is implemented.
Since the queues are not stopped in this case, transmissions can continue
and this will impact negatively on the operation of the wireless device.

For example,
During hardware restart, we stop the netdev queues so that packets are
not sent to the driver. Since ath10k implements wake_tx_queue,
TX queues will not be stopped and packets might reach the hardware while
it is restarting; this can make hardware unresponsive and the only
possible option for recovery is to reboot the entire system.

There is another problem to this, it is observed that the packets
were sent on the DFS channel for a prolonged duration after radar
detection impacting the channel closing time.

We can still invoke netif stop/wake APIs when wake_tx_queue is implemented
but this could lead to packet drops in network layer; adding stop/start
logic for software TXQs in mac80211 instead makes more sense; the change
proposed adds the same in mac80211.
Signed-off-by: NManikanta Pubbisetty <mpubbise@codeaurora.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Make ieee80211_send_layer2_update() a common function so other drivers
can re-use it.
Signed-off-by: NDedy Lansky <dlansky@codeaurora.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

I changed the way mac80211 updates the PM state of the peer.
I forgot that we could also have multicast frames from the
peer and that those frame should of course not change the
PM state of the peer: A peer goes to power save when it
needs to scan, but it won't send the broadcast Probe Request
with the PM bit set.

This made us mark the peer as awake when it wasn't and then
Intel's firmware would fail to transmit because the peer is
asleep according to its database. The driver warned about
this and it looked like this:

 WARNING: CPU: 0 PID: 184 at /usr/src/linux-4.16.14/drivers/net/wireless/intel/iwlwifi/mvm/tx.c:1369 iwl_mvm_rx_tx_cmd+0x53b/0x860
 CPU: 0 PID: 184 Comm: irq/124-iwlwifi Not tainted 4.16.14 #1
 RIP: 0010:iwl_mvm_rx_tx_cmd+0x53b/0x860
 Call Trace:
  iwl_pcie_rx_handle+0x220/0x880
  iwl_pcie_irq_handler+0x6c9/0xa20
  ? irq_forced_thread_fn+0x60/0x60
  ? irq_thread_dtor+0x90/0x90

The relevant code that spits the WARNING is:

        case TX_STATUS_FAIL_DEST_PS:
                /* the FW should have stopped the queue and not
                 * return this status
                 */
                WARN_ON(1);
                info->flags |= IEEE80211_TX_STAT_TX_FILTERED;

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=199967.

Fixes: 9fef6544 ("mac80211: always update the PM state of a peer on MGMT / DATA frames")
Cc: <stable@vger.kernel.org>   #4.16+
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Make wmm_rule be part of the reg_rule structure. This simplifies the
code a lot at the cost of having bigger memory usage. However in most
cases we have only few reg_rule's and when we do have many like in
iwlwifi we do not save memory as it allocates a separate wmm_rule for
each channel anyway.

This also fixes a bug reported in various places where somewhere the
pointers were corrupted and we ended up doing a null-dereference.

Fixes: 230ebaa1 ("cfg80211: read wmm rules from regulatory database")
Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
[rephrase commit message slightly]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The mod mask for VHT capabilities intends to say that you can override
the number of STBC receive streams, and it does, but only by accident.
The IEEE80211_VHT_CAP_RXSTBC_X aren't bits to be set, but values (albeit
left-shifted).  ORing the bits together gets the right answer, but we
should use the _MASK macro here instead.
Signed-off-by: NDanek Duvall <duvall@comfychair.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The TXQ teardown code can reference the vif data structures that are
stored in the netdev private memory area if there are still packets on
the queue when it is being freed. Since the TXQ teardown code is run
after the netdevs are freed, this can lead to a use-after-free. Fix this
by moving the TXQ teardown code to earlier in ieee80211_unregister_hw().
Reported-by: NBen Greear <greearb@candelatech.com>
Tested-by: NBen Greear <greearb@candelatech.com>
Signed-off-by: NToke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Several files have extra line at end of file.
Signed-off-by: NStephen Hemminger <stephen@networkplumber.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As explained in ieee80211_delayed_tailroom_dec(), during roam,
keys of the old AP will be destroyed and new keys will be
installed. Deletion of the old key causes
crypto_tx_tailroom_needed_cnt to go from 1 to 0 and the new key
installation causes a transition from 0 to 1.

Whenever crypto_tx_tailroom_needed_cnt transitions from 0 to 1,
we invoke synchronize_net(); the reason for doing this is to avoid
a race in the TX path as explained in increment_tailroom_need_count().
This synchronize_net() operation can be slow and can affect the station
roam time. To avoid this, decrementing the crypto_tx_tailroom_needed_cnt
is delayed for a while so that upon installation of new key the
transition would be from 1 to 2 instead of 0 to 1 and thereby
improving the roam time.

This is all correct for a STA iftype, but deferring the tailroom_needed
decrement for other iftypes may be unnecessary.

For example, let's consider the case of a 4-addr client connecting to
an AP for which AP_VLAN interface is also created, let the initial
value for tailroom_needed on the AP be 1.

* 4-addr client connects to the AP (AP: tailroom_needed = 1)
* AP will clear old keys, delay decrement of tailroom_needed count
* AP_VLAN is created, it takes the tailroom count from master
  (AP_VLAN: tailroom_needed = 1, AP: tailroom_needed = 1)
* Install new key for the station, assume key is plumbed in the HW,
  there won't be any change in tailroom_needed count on AP iface
* Delayed decrement of tailroom_needed count on AP
  (AP: tailroom_needed = 0, AP_VLAN: tailroom_needed = 1)

Because of the delayed decrement on AP iface, tailroom_needed count goes
out of sync between AP(master iface) and AP_VLAN(slave iface) and
there would be unnecessary tailroom created for the packets going
through AP_VLAN iface.

Also, WARN_ONs were observed while trying to bring down the AP_VLAN
interface:
(warn_slowpath_common) (warn_slowpath_null+0x18/0x20)
(warn_slowpath_null) (ieee80211_free_keys+0x114/0x1e4)
(ieee80211_free_keys) (ieee80211_del_virtual_monitor+0x51c/0x850)
(ieee80211_del_virtual_monitor) (ieee80211_stop+0x30/0x3c)
(ieee80211_stop) (__dev_close_many+0x94/0xb8)
(__dev_close_many) (dev_close_many+0x5c/0xc8)

Restricting delayed decrement to station interface alone fixes the problem
and it makes sense to do so because delayed decrement is done to improve
roam time which is applicable only for client devices.
Signed-off-by: NManikanta Pubbisetty <mpubbise@codeaurora.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This patch makes it so that instead of passing a void pointer as the
accel_priv we instead pass a net_device pointer as sb_dev. Making this
change allows us to pass the subordinate device through to the fallback
function eventually so that we can keep the actual code in the
ndo_select_queue call as focused on possible on the exception cases.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Since (QoS) NDP frames shouldn't be put into aggregation nor are
assigned real sequence numbers, etc. it's better to treat them as
non-data packets and not put them on the normal TXQs, for example
when building A-MPDUs they need to be treated specially, and they
are more used for management (e.g. to see if the station is alive)
anyway.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The current implementation of cfg80211_rx_control_port assumed that the
caller could provide a contiguous region of memory for the control port
frame to be sent up to userspace.  Unfortunately, many drivers produce
non-linear skbs, especially for data frames.  This resulted in userspace
getting notified of control port frames with correct metadata (from
address, port, etc) yet garbage / nonsense contents, resulting in bad
handshakes, disconnections, etc.

mac80211 linearizes skbs containing management frames.  But it didn't
seem worthwhile to do this for control port frames.  Thus the signature
of cfg80211_rx_control_port was changed to take the skb directly.
nl80211 then takes care of obtaining control port frame data directly
from the (linear | non-linear) skb.

The caller is still responsible for freeing the skb,
cfg80211_rx_control_port does not take ownership of it.

Fixes: 6a671a50 ("nl80211: Add CMD_CONTROL_PORT_FRAME API")
Signed-off-by: NDenis Kenzior <denkenz@gmail.com>
[fix some kernel-doc formatting, add fixes tag]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Given that activating a trigger can fail, let the callback return an
indication. This prevents to have a trigger active according to the
"trigger" sysfs attribute but not functional.

All users are changed accordingly to return 0 for now. There is no intended
change in behaviour.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: NPavel Machek <pavel@ucw.cz>
Signed-off-by: NJacek Anaszewski <jacek.anaszewski@gmail.com>

As part of hw reconfig, only stations linked to AP interfaces are added
back to the driver ignoring those which are tied to AP_VLAN interfaces.

It is true that there could be stations tied to the AP_VLAN interface while
serving 4addr clients or when using AP_VLAN for VLAN operations; we should
be adding these stations back to the driver as part of hw reconfig, failing
to do so can cause functional issues.

In the case of ath10k driver, the following errors were observed.

ath10k_pci : failed to install key for non-existent peer XX:XX:XX:XX:XX:XX
Workqueue: events_freezable ieee80211_restart_work [mac80211]
(unwind_backtrace) from (show_stack+0x10/0x14)
(show_stack) (dump_stack+0x80/0xa0)
(dump_stack) (warn_slowpath_common+0x68/0x8c)
(warn_slowpath_common) (warn_slowpath_null+0x18/0x20)
(warn_slowpath_null) (ieee80211_enable_keys+0x88/0x154 [mac80211])
(ieee80211_enable_keys) (ieee80211_reconfig+0xc90/0x19c8 [mac80211])
(ieee80211_reconfig]) (ieee80211_restart_work+0x8c/0xa0 [mac80211])
(ieee80211_restart_work) (process_one_work+0x284/0x488)
(process_one_work) (worker_thread+0x228/0x360)
(worker_thread) (kthread+0xd8/0xec)
(kthread) (ret_from_fork+0x14/0x24)

Also while bringing down the AP VAP, WARN_ONs and errors related to peer
removal were observed.

ath10k_pci : failed to clear all peer wep keys for vdev 0: -2
ath10k_pci : failed to disassociate station: 8c:fd:f0:0a:8c:f5 vdev 0: -2
(unwind_backtrace) (show_stack+0x10/0x14)
(show_stack) (dump_stack+0x80/0xa0)
(dump_stack) (warn_slowpath_common+0x68/0x8c)
(warn_slowpath_common) (warn_slowpath_null+0x18/0x20)
(warn_slowpath_null) (sta_set_sinfo+0xb98/0xc9c [mac80211])
(sta_set_sinfo [mac80211]) (__sta_info_flush+0xf0/0x134 [mac80211])
(__sta_info_flush [mac80211]) (ieee80211_stop_ap+0xe8/0x390 [mac80211])
(ieee80211_stop_ap [mac80211]) (__cfg80211_stop_ap+0xe0/0x3dc [cfg80211])
(__cfg80211_stop_ap [cfg80211]) (cfg80211_stop_ap+0x30/0x44 [cfg80211])
(cfg80211_stop_ap [cfg80211]) (genl_rcv_msg+0x274/0x30c)
(genl_rcv_msg) (netlink_rcv_skb+0x58/0xac)
(netlink_rcv_skb) (genl_rcv+0x20/0x34)
(genl_rcv) (netlink_unicast+0x11c/0x204)
(netlink_unicast) (netlink_sendmsg+0x30c/0x370)
(netlink_sendmsg) (sock_sendmsg+0x70/0x84)
(sock_sendmsg) (___sys_sendmsg.part.3+0x188/0x228)
(___sys_sendmsg.part.3) (__sys_sendmsg+0x4c/0x70)
(__sys_sendmsg) (ret_fast_syscall+0x0/0x44)

These issues got fixed by adding the stations which are
tied to AP_VLANs back to the driver.
Signed-off-by: NManikanta Pubbisetty <mpubbise@codeaurora.org>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

The BIT macro uses unsigned long which some architectures handle as 32 bit
and therefore might cause macro's shift to overflow when used on a value
equals or larger than 32 (NL80211_STA_INFO_RX_DURATION and afterwards).

Since 'filled' member in station_info changed to u64, BIT_ULL macro
should be used with all NL80211_STA_INFO_* attribute types instead of BIT
to prevent future possible bugs when one will use BIT macro for higher
attributes by mistake.

This commit cleans up all usages of BIT macro with the above field
in mac80211 by changing it to BIT_ULL instead.
Signed-off-by: NOmer Efrat <omer.efrat@tandemg.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

We don't need to check if he_oper is NULL before calling
ieee80211_verify_sta_he_mcs_support() as it - now - will
correctly check this itself. Remove the redundant check.
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

he_op is being dereferenced before it is null checked, hence there
is a potential null pointer dereference.

Fix this by moving the pointer dereference after he_op has been
properly null checked.

Notice that, currently, he_op is already being null checked before
calling this function at 4593:

4593	if (!he_oper ||
4594	    !ieee80211_verify_sta_he_mcs_support(sband, he_oper))
4595		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;

but in case ieee80211_verify_sta_he_mcs_support is ever called
without verifying he_oper is not null, we will end up having a
null pointer dereference. So, we better don't take any chances.

Addresses-Coverity-ID: 1470068 ("Dereference before null check")
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

On pre-emption enabled kernels the following print was being seen due to
missing local_bh_disable/local_bh_enable calls.  mac80211 assumes that
pre-emption is disabled in the data path.

    BUG: using smp_processor_id() in preemptible [00000000] code: iwd/517
    caller is __ieee80211_subif_start_xmit+0x144/0x210 [mac80211]
    [...]
    Call Trace:
    dump_stack+0x5c/0x80
    check_preemption_disabled.cold.0+0x46/0x51
    __ieee80211_subif_start_xmit+0x144/0x210 [mac80211]

Fixes: 91180649 ("mac80211: Add support for tx_control_port")
Signed-off-by: NDenis Kenzior <denkenz@gmail.com>
[commit message rewrite, fixes tag]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Add support for HE in mac80211 conforming with P802.11ax_D1.4.

Johannes: Fix another bug with the buf_size comparison in agg-rx.c.
Signed-off-by: NLiad Kaufman <liad.kaufman@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
Signed-off-by: NIlan Peer <ilan.peer@intel.com>
Signed-off-by: NIdo Yariv <idox.yariv@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>