Commit Graph

397 Commits

Author SHA1 Message Date
David S. Miller
2be09de7d6 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Lots of conflicts, by happily all cases of overlapping
changes, parallel adds, things of that nature.

Thanks to Stephen Rothwell, Saeed Mahameed, and others
for their guidance in these resolutions.

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-20 11:53:36 -08:00
David S. Miller
5a862f86b8 This time we have too many changes to list, highlights:
* virt_wifi - wireless control simulation on top of
    another network interface
  * hwsim configurability to test capabilities similar
    to real hardware
  * various mesh improvements
  * various radiotap vendor data fixes in mac80211
  * finally the nl_set_extack_cookie_u64() we talked
    about previously, used for
  * peer measurement APIs, right now only with FTM
    (flight time measurement) for location
  * made nl80211 radio/interface announcements more complete
  * various new HE (802.11ax) things:
    updates, TWT support, ...
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Merge tag 'mac80211-next-for-davem-2018-12-19' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

Johannes Berg says:

====================
This time we have too many changes to list, highlights:
 * virt_wifi - wireless control simulation on top of
   another network interface
 * hwsim configurability to test capabilities similar
   to real hardware
 * various mesh improvements
 * various radiotap vendor data fixes in mac80211
 * finally the nl_set_extack_cookie_u64() we talked
   about previously, used for
 * peer measurement APIs, right now only with FTM
   (flight time measurement) for location
 * made nl80211 radio/interface announcements more complete
 * various new HE (802.11ax) things:
   updates, TWT support, ...
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-12-19 08:36:18 -08:00
Johannes Berg
dd665d23c1 mac80211: never pass NULL params to ieee80211_if_add()
This isn't really a problem now, but it means that the function
has a few NULL checks that are only relevant when coming from
the initial interface added in mac80211, and that's confusing.
Just pass non-NULL (but equivalently empty) in that case and
remove all the NULL checks.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-12-18 13:17:26 +01:00
Sara Sharon
a50e5fb8db mac80211: fix a kernel panic when TXing after TXQ teardown
Recently TXQ teardown was moved earlier in ieee80211_unregister_hw(),
to avoid a use-after-free of the netdev data. However, interfaces
aren't fully removed at the point, and cfg80211_shutdown_all_interfaces
can for example, TX a deauth frame. Move the TXQ teardown to the
point between cfg80211_shutdown_all_interfaces and the free of
netdev queues, so we can be sure they are torn down before netdev
is freed, but after there is no ongoing TX.

Fixes: 77cfaf52ec ("mac80211: Run TXQ teardown code before de-registering interfaces")
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-12-18 13:03:32 +01:00
Ben Greear
5c21e8100d mac80211: Clear beacon_int in ieee80211_do_stop
This fixes stale beacon-int values that would keep a netdev
from going up.

To reproduce:

Create two VAP on one radio.
vap1 has beacon-int 100, start it.
vap2 has beacon-int 240, start it (and it will fail
  because beacon-int mismatch).
reconfigure vap2 to have beacon-int 100 and start it.
  It will fail because the stale beacon-int 240 will be used
  in the ifup path and hostapd never gets a chance to set the
  new beacon interval.

Cc: stable@vger.kernel.org
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-11-09 08:56:38 +01:00
Felix Fietkau
8105f9b8a8 mac80211: allocate TXQs for active monitor interfaces
Monitor mode interfaces with the active flag are passed down to the driver.
Drivers using TXQ expect that all interfaces have allocated TXQs before
they get added.

Fixes: 79af1f8661 ("mac80211: avoid allocating TXQs that won't be used")
Cc: stable@vger.kernel.org
Reported-by: Catrinel Catrinescu <cc@80211.de>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-09-26 11:16:54 +02:00
Alexander Duyck
4f49dec907 net: allow ndo_select_queue to pass netdev
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: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2018-07-09 13:41:34 -07:00
Denis Kenzior
018f6fbf54 mac80211: Send control port frames over nl80211
If userspace requested control port frames to go over 80211, then do so.
The control packets are intercepted just prior to delivery of the packet
to the underlying network device.

Pre-authentication type frames (protocol: 0x88c7) are also forwarded
over nl80211.

Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-03-29 14:08:30 +02:00
Sara Sharon
a1f2ba04cc mac80211: add get TID helper
Extracting the TID from the QOS header is common enough
to justify helper.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-02-22 21:13:03 +01:00
Luca Coelho
c7976f5272 mac80211: remove BUG() when interface type is invalid
In the ieee80211_setup_sdata() we check if the interface type is valid
and, if not, call BUG().  This should never happen, but if there is
something wrong with the code, it will not be caught until the bug
happens when an interface is being set up.  Calling BUG() is too
extreme for this and a WARN_ON() would be better used instead.  Change
that.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-12-11 12:19:02 +01:00
Gustavo A. R. Silva
02049ce27e mac80211: mark expected switch fall-throughs
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in some cases I replaced "fall through on else" and
"otherwise fall through" comments with just a "fall through" comment,
which is what GCC is expecting to find.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-12-11 12:16:04 +01:00
Johannes Berg
2a9e25796b mac80211: only remove AP VLAN frames from TXQ
When removing an AP VLAN interface, mac80211 currently purges
the entire TXQ for the AP interface. Fix this by using the FQ
API introduced in the previous patch to filter frames.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-10-11 09:49:40 +02:00
Johannes Berg
79af1f8661 mac80211: avoid allocating TXQs that won't be used
For AP_VLAN and monitor interfaces we'll never use the TXQs
we allocated, so avoid doing so.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-09-21 11:41:57 +02:00
Chunho Lee
89e9bfc4ee mac80211: Fix null pointer dereference with iTXQ support
This change adds null pointer check before dereferencing pointer dev on
netif_tx_start_all_queues() when an interface is added.
With iTXQ support, netif_tx_start_all_queues() is always called while
an interface is added. however, the netdev queues are not associated
and dev is null when the interface is either NL80211_IFTYPE_P2P_DEVICE
or NL80211_IFTYPE_NAN.

Signed-off-by: Chunho Lee <ch.lee@newracom.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-09-05 11:28:51 +02:00
Johannes Berg
5316821590 mac80211: fix VLAN handling with TXQs
With TXQs, the AP_VLAN interfaces are resolved to their owner AP
interface when enqueuing the frame, which makes sense since the
frame really goes out on that as far as the driver is concerned.

However, this introduces a problem: frames to be encrypted with
a VLAN-specific GTK will now be encrypted with the AP GTK, since
the information about which virtual interface to use to select
the key is taken from the TXQ.

Fix this by preserving info->control.vif and using that in the
dequeue function. This now requires doing the driver-mapping
in the dequeue as well.

Since there's no way to filter the frames that are sitting on a
TXQ, drop all frames, which may affect other interfaces, when an
AP_VLAN is removed.

Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-09-05 11:28:43 +02:00
David S. Miller
0ddead90b2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
The conflicts were two cases of overlapping changes in
batman-adv and the qed driver.

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-15 11:59:32 -04:00
Johannes Berg
c7a61cba71 mac80211: free netdev on dev_alloc_name() error
The change to remove free_netdev() from ieee80211_if_free()
erroneously didn't add the necessary free_netdev() for when
ieee80211_if_free() is called directly in one place, rather
than as the priv_destructor. Add the missing call.

Fixes: cf124db566 ("net: Fix inconsistent teardown and release of private netdev state.")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-09 15:40:15 -04:00
Johannes Berg
699cb58c8a mac80211: manage RX BA session offload without SKB queue
Instead of using the SKB queue with the fake pkt_type for the
offloaded RX BA session management, also handle this with the
normal aggregation state machine worker. This also makes the
use of this more reliable since it gets rid of the allocation
of the fake skb.

Combined with the previous patch, this finally allows us to
get rid of the pkt_type hack entirely, so do that as well.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-06-08 14:16:29 +02:00
David S. Miller
cf124db566 net: Fix inconsistent teardown and release of private netdev state.
Network devices can allocate reasources and private memory using
netdev_ops->ndo_init().  However, the release of these resources
can occur in one of two different places.

Either netdev_ops->ndo_uninit() or netdev->destructor().

The decision of which operation frees the resources depends upon
whether it is necessary for all netdev refs to be released before it
is safe to perform the freeing.

netdev_ops->ndo_uninit() presumably can occur right after the
NETDEV_UNREGISTER notifier completes and the unicast and multicast
address lists are flushed.

netdev->destructor(), on the other hand, does not run until the
netdev references all go away.

Further complicating the situation is that netdev->destructor()
almost universally does also a free_netdev().

This creates a problem for the logic in register_netdevice().
Because all callers of register_netdevice() manage the freeing
of the netdev, and invoke free_netdev(dev) if register_netdevice()
fails.

If netdev_ops->ndo_init() succeeds, but something else fails inside
of register_netdevice(), it does call ndo_ops->ndo_uninit().  But
it is not able to invoke netdev->destructor().

This is because netdev->destructor() will do a free_netdev() and
then the caller of register_netdevice() will do the same.

However, this means that the resources that would normally be released
by netdev->destructor() will not be.

Over the years drivers have added local hacks to deal with this, by
invoking their destructor parts by hand when register_netdevice()
fails.

Many drivers do not try to deal with this, and instead we have leaks.

Let's close this hole by formalizing the distinction between what
private things need to be freed up by netdev->destructor() and whether
the driver needs unregister_netdevice() to perform the free_netdev().

netdev->priv_destructor() performs all actions to free up the private
resources that used to be freed by netdev->destructor(), except for
free_netdev().

netdev->needs_free_netdev is a boolean that indicates whether
free_netdev() should be done at the end of unregister_netdevice().

Now, register_netdevice() can sanely release all resources after
ndo_ops->ndo_init() succeeds, by invoking both ndo_ops->ndo_uninit()
and netdev->priv_destructor().

And at the end of unregister_netdevice(), we invoke
netdev->priv_destructor() and optionally call free_netdev().

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-07 15:53:24 -04:00
Johannes Berg
7a7c0a6438 mac80211: fix TX aggregation start/stop callback race
When starting or stopping an aggregation session, one of the steps
is that the driver calls back to mac80211 that the start/stop can
proceed. This is handled by queueing up a fake SKB and processing
it from the normal iface/sdata work. Since this isn't flushed when
disassociating, the following race is possible:

 * associate
 * start aggregation session
 * driver callback
 * disassociate
 * associate again to the same AP
 * callback processing runs, leading to a WARN_ON() that
   the TID hadn't requested aggregation

If the second association isn't to the same AP, there would only
be a message printed ("Could not find station: <addr>"), but the
same race could happen.

Fix this by not going the whole detour with a fake SKB etc. but
simply looking up the aggregation session in the driver callback,
marking it with a START_CB/STOP_CB bit and then scheduling the
regular aggregation work that will now process these bits as well.
This also simplifies the code and gets rid of the whole problem
with allocation failures of said skb, which could have left the
session in limbo.

Reported-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-05-30 09:08:40 +02:00
David S. Miller
028f43bc64 My last pull request has been a while, we now have:
* connection quality monitoring with multiple thresholds
  * support for FILS shared key authentication offload
  * pre-CAC regulatory compliance - only ETSI allows this
  * sanity check for some rate confusion that hit ChromeOS
    (but nobody else uses it, evidently)
  * some documentation updates
  * lots of cleanups
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Merge tag 'mac80211-next-for-davem-2017-04-18' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

Johannes Berg says:

====================
My last pull request has been a while, we now have:
 * connection quality monitoring with multiple thresholds
 * support for FILS shared key authentication offload
 * pre-CAC regulatory compliance - only ETSI allows this
 * sanity check for some rate confusion that hit ChromeOS
   (but nobody else uses it, evidently)
 * some documentation updates
 * lots of cleanups
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-20 13:54:40 -04:00
Johannes Berg
f64331d580 mac80211: keep a separate list of monitor interfaces that are up
In addition to keeping monitor interfaces on the regular list of
interfaces, keep those that are up and not in cooked mode on a
separate list. This saves having to iterate all interfaces when
delivering to monitor interfaces.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-04-18 11:00:13 +02:00
Johannes Berg
7d65f82954 mac80211: unconditionally start new netdev queues with iTXQ support
When internal mac80211 TXQs aren't supported, netdev queues must
always started out started even when driver queues are stopped
while the interface is added. This is necessary because with the
internal TXQ support netdev queues are never stopped and packet
scheduling/dropping is done in mac80211.

Cc: stable@vger.kernel.org # 4.9+
Fixes: 80a83cfc43 ("mac80211: skip netdev queue control with software queuing")
Reported-and-tested-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-03-29 14:20:40 +02:00
David S. Miller
580bdf5650 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-01-17 15:19:37 -05:00
Johannes Berg
d2941df8fb mac80211: recalculate min channel width on VHT opmode changes
When an associated station changes its VHT operating mode this
can/will affect the bandwidth it's using, and consequently we
must recalculate the minimum bandwidth we need to use. Failure
to do so can lead to one of two scenarios:
 1) we use a too high bandwidth, this is benign
 2) we use a too narrow bandwidth, causing rate control and
    actual PHY configuration to be out of sync, which can in
    turn cause problems/crashes

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-01-11 16:35:05 +01:00
stephen hemminger
bc1f44709c net: make ndo_get_stats64 a void function
The network device operation for reading statistics is only called
in one place, and it ignores the return value. Having a structure
return value is potentially confusing because some future driver could
incorrectly assume that the return value was used.

Fix all drivers with ndo_get_stats64 to have a void function.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-08 17:51:44 -05:00
David S. Miller
32ab0a38f0 Among various cleanups and improvements, we have the following:
* client FILS authentication support in mac80211 (Jouni)
  * AP/VLAN multicast improvements (Michael Braun)
  * config/advertising support for differing beacon intervals on
    multiple virtual interfaces (Purushottam Kushwaha, myself)
  * deprecate the old WDS mode for cfg80211-based drivers, the
    mode is hardly usable since it doesn't support any "modern"
    features like WPA encryption (2003), HT (2009) or VHT (2014),
    I'm not even sure WEP (introduced in 1997) could be done.
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Merge tag 'mac80211-next-for-davem-2016-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

Johannes Berg says:

====================
Among various cleanups and improvements, we have the following:
 * client FILS authentication support in mac80211 (Jouni)
 * AP/VLAN multicast improvements (Michael Braun)
 * config/advertising support for differing beacon intervals on
   multiple virtual interfaces (Purushottam Kushwaha, myself)
 * deprecate the old WDS mode for cfg80211-based drivers, the
   mode is hardly usable since it doesn't support any "modern"
   features like WPA encryption (2003), HT (2009) or VHT (2014),
   I'm not even sure WEP (introduced in 1997) could be done.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-29 17:28:45 -04:00
Jarod Wilson
9c22b4a34e net: use core MTU range checking in wireless drivers
- set max_mtu in wil6210 driver
- set max_mtu in atmel driver
- set min/max_mtu in cisco airo driver, remove airo_change_mtu
- set min/max_mtu in ipw2100/ipw2200 drivers, remove libipw_change_mtu
- set min/max_mtu in p80211netdev, remove wlan_change_mtu
- set min/max_mtu in net/mac80211/iface.c and remove ieee80211_change_mtu
- set min/max_mtu in wimax/i2400m and remove i2400m_change_mtu
- set min/max_mtu in intersil/hostap and remove prism2_change_mtu
- set min/max_mtu in intersil/orinoco
- set min/max_mtu in tty/n_gsm and remove gsm_change_mtu

CC: netdev@vger.kernel.org
CC: linux-wireless@vger.kernel.org
CC: Maya Erez <qca_merez@qca.qualcomm.com>
CC: Simon Kelley <simon@thekelleys.org.uk>
CC: Stanislav Yakovlev <stas.yakovlev@gmail.com>
CC: Johannes Berg <johannes@sipsolutions.net>
CC: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-20 14:51:08 -04:00
Michael Braun
72f15d53f3 mac80211: filter multicast data packets on AP / AP_VLAN
This patch adds filtering for multicast data packets on AP_VLAN
interfaces that have no authorized station connected and changes
filtering on AP interfaces to not count stations assigned to
AP_VLAN interfaces.

This saves airtime and avoids waking up other stations currently
authorized in this BSS. When using WPA, the packets dropped could
not be decrypted by any station.

The behaviour when there are no AP_VLAN interfaces is left unchanged.

When there are AP_VLAN interfaces, this patch
1. adds filtering multicast data packets sent on AP_VLAN interfaces
   that have no authorized station connected.
   No filtering happens on 4addr AP_VLAN interfaces.
2. makes filtering of multicast data packets sent on AP interfaces
   depend on the number of authorized stations in this bss not
   assigned to an AP_VLAN interface.

Therefore, a new num_mcast_sta counter is added for AP_VLAN interfaces.
The existing one for AP interfaces is altered to not track stations
assigned to an AP_VLAN interface.

The new counter is exposed in debugfs.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
[reformat commit message a bit, unline ieee80211_vif_{inc,dec}_num_mcast]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-10-12 11:33:29 +02:00
Ayala Beker
167e33f4f6 mac80211: Implement add_nan_func and rm_nan_func
Implement add/rm_nan_func functions and handle NAN function
termination notifications. Handle instance_id allocation for
NAN functions and implement the reconfig flow.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-09-30 13:21:52 +02:00
Ayala Beker
708d50edb1 mac80211: add boilerplate code for start / stop NAN
This code doesn't do much besides allowing to start and
stop the vif.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Ayala Beker <ayala.beker@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-09-30 13:21:19 +02:00
Ayala Beker
cb3b7d8765 cfg80211: add start / stop NAN commands
This allows user space to start/stop NAN interface.
A NAN interface is like P2P device in a few aspects: it
doesn't have a netdev associated to it.
Add the new interface type and prevent operations that
can't be executed on NAN interface like scan.

Define several attributes that may be configured by user space
when starting NAN functionality (master preference and dual
band operation)

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-09-30 13:21:14 +02:00
Aviya Erenfeld
42bd20d998 mac80211: add support for MU-MIMO air sniffer
add support to MU-MIMO air sniffer according groupID:
in monitor mode, use a given MU-MIMO groupID to monitor stations
that belongs to that group using MU-MIMO.

add support for following a station according to its MAC address
using VHT MU-MIMO sniffer:
the monitors wait until they get an action MU-MIMO notification
frame, then parses it in order to find the groupID that corresponds
to the given MAC address and monitors packets destined to that
groupID using VHT MU-MIMO.

Signed-off-by: Aviya Erenfeld <aviya.erenfeld@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-09-12 11:44:52 +02:00
Aviya Erenfeld
d82121845d mac80211: refactor monitor representation in sdata
Insert the u32 monitor flags variable in a new structure
that represents a monitor interface.
This will allow to add more configuration variables to
that structure which will happen in an upcoming change.

Signed-off-by: Aviya Erenfeld <aviya.erenfeld@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-09-12 11:24:47 +02:00
Michal Kazior
fa962b9212 mac80211: implement fair queueing per txq
mac80211's software queues were designed to work
very closely with device tx queues. They are
required to make use of 802.11 packet aggregation
easily and efficiently.

Due to the way 802.11 aggregation is designed it
only makes sense to keep fair queuing as close to
hardware as possible to reduce induced latency and
inertia and provide the best flow responsiveness.

This change doesn't translate directly to
immediate and significant gains. End result
depends on driver's induced latency. Best results
can be achieved if driver keeps its own tx
queue/fifo fill level to a minimum.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-06-09 11:34:08 +02:00
Michal Kazior
80a83cfc43 mac80211: skip netdev queue control with software queuing
Qdiscs are designed with no regard to 802.11
aggregation requirements and hand out
packet-by-packet with no guarantee they are
destined to the same tid. This does more bad than
good no matter how fairly a given qdisc may behave
on an ethernet interface.

Software queuing used per-AC netdev subqueue
congestion control whenever a global AC limit was
hit. This meant in practice a single station or
tid queue could starve others rather easily. This
could resonate with qdiscs in a bad way or could
just end up with poor aggregation performance.
Increasing the AC limit would increase induced
latency which is also bad.

Disabling qdiscs by default and performing
taildrop instead of netdev subqueue congestion
control on the other hand makes it possible for
tid queues to fill up "in the meantime" while
preventing stations starving each other.

This increases aggregation opportunities and
should allow software queuing based drivers
achieve better performance by utilizing airtime
more efficiently with big aggregates.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-06-09 11:31:27 +02:00
David S. Miller
cba6532100 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	net/ipv4/ip_gre.c

Minor conflicts between tunnel bug fixes in net and
ipv6 tunnel cleanups in net-next.

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-04 00:52:29 -04:00
Johannes Berg
e6436be21e mac80211: fix statistics leak if dev_alloc_name() fails
In the case that dev_alloc_name() fails, e.g. because the name was
given by the user and already exists, we need to clean up properly
and free the per-CPU statistics. Fix that.

Cc: stable@vger.kernel.org
Fixes: 5a490510ba ("mac80211: use per-CPU TX/RX statistics")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-04-27 10:06:58 +02:00
Johannes Berg
57fbcce37b cfg80211: remove enum ieee80211_band
This enum is already perfectly aliased to enum nl80211_band, and
the only reason for it is that we get IEEE80211_NUM_BANDS out of
it. There's no really good reason to not declare the number of
bands in nl80211 though, so do that and remove the cfg80211 one.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-04-12 15:56:15 +02:00
Bob Copeland
0371a08fbb mac80211: mesh: fix cleanup for mesh pathtable
The mesh path table needs to be around for the entire time the
interface is in mesh mode, as users can perform an mpath dump
at any time.  The existing path table lifetime is instead tied
to the mesh BSS which can cause crashes when different MBSSes
are joined in the context of a single interface, or when the
path table is dumped when no MBSS is joined.

Introduce a new function to perform the final teardown of the
interface and perform path table cleanup there.  We already
free the individual path elements when the leaving the mesh
so no additional cleanup is needed there.  This fixes the
following crash:

[   47.753026] BUG: unable to handle kernel paging request at fffffff0
[   47.753026] IP: [<c0239765>] kthread_data+0xa/0xe
[   47.753026] *pde = 00741067 *pte = 00000000
[   47.753026] Oops: 0000 [#4] PREEMPT
[   47.753026] Modules linked in: ppp_generic slhc 8021q garp mrp sch_fq_codel iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat ip_tables ath9k_htc ath5k 8139too ath10k_pci ath10k_core arc4 ath9k ath9k_common ath9k_hw mac80211 ath cfg80211 cpufreq_powersave br_netfilter bridge stp llc ipw usb_wwan sierra_net usbnet af_alg natsemi via_rhine mii iTCO_wdt iTCO_vendor_support gpio_ich sierra coretemp pcspkr i2c_i801 lpc_ich ata_generic ata_piix libata ide_pci_generic piix e1000e igb i2c_algo_bit ptp pps_core [last unloaded: 8139too]
[   47.753026] CPU: 0 PID: 12 Comm: kworker/u2:1 Tainted: G      D W       4.5.0-wt-V3 #6
[   47.753026] Hardware name: To Be Filled By O.E.M./To be filled by O.E.M., BIOS 080016  11/07/2014
[   47.753026] task: f645a0c0 ti: f6462000 task.ti: f6462000
[   47.753026] EIP: 0060:[<c0239765>] EFLAGS: 00010002 CPU: 0
[   47.753026] EIP is at kthread_data+0xa/0xe
[   47.753026] EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000
[   47.753026] ESI: f645a0c0 EDI: f645a2fc EBP: f6463a80 ESP: f6463a78
[   47.753026]  DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
[   47.753026] CR0: 8005003b CR2: 00000014 CR3: 353e5000 CR4: 00000690
[   47.753026] Stack:
[   47.753026]  c0236866 00000000 f6463aac c05768b4 00000009 f6463ba8 f6463ab0 c0247010
[   47.753026]  00000000 f645a0c0 f6464000 00000009 f6463ba8 f6463ab8 c0576eb2 f645a0c0
[   47.753026]  f6463aec c0228be4 c06335a4 f6463adc f6463ad0 c06c06d4 f6463ae4 c02471b0
[   47.753026] Call Trace:
[   47.753026]  [<c0236866>] ? wq_worker_sleeping+0xb/0x78
[   47.753026]  [<c05768b4>] __schedule+0xda/0x587
[   47.753026]  [<c0247010>] ? vprintk_default+0x12/0x14
[   47.753026]  [<c0576eb2>] schedule+0x72/0x89
[   47.753026]  [<c0228be4>] do_exit+0xb8/0x71d
[   47.753026]  [<c02471b0>] ? kmsg_dump+0xa9/0xae
[   47.753026]  [<c0203576>] oops_end+0x69/0x70
[   47.753026]  [<c021dcdb>] no_context+0x1bb/0x1c5
[   47.753026]  [<c021de1b>] __bad_area_nosemaphore+0x136/0x140
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021de32>] bad_area_nosemaphore+0xd/0x10
[   47.753026]  [<c021e0a1>] __do_page_fault+0x26c/0x320
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021e2fa>] do_page_fault+0xb/0xd
[   47.753026]  [<c05798f8>] error_code+0x58/0x60
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c0239765>] ? kthread_data+0xa/0xe
[   47.753026]  [<c0236866>] ? wq_worker_sleeping+0xb/0x78
[   47.753026]  [<c05768b4>] __schedule+0xda/0x587
[   47.753026]  [<c0247010>] ? vprintk_default+0x12/0x14
[   47.753026]  [<c0576eb2>] schedule+0x72/0x89
[   47.753026]  [<c0228be4>] do_exit+0xb8/0x71d
[   47.753026]  [<c02471b0>] ? kmsg_dump+0xa9/0xae
[   47.753026]  [<c0203576>] oops_end+0x69/0x70
[   47.753026]  [<c021dcdb>] no_context+0x1bb/0x1c5
[   47.753026]  [<c021de1b>] __bad_area_nosemaphore+0x136/0x140
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021de32>] bad_area_nosemaphore+0xd/0x10
[   47.753026]  [<c021e0a1>] __do_page_fault+0x26c/0x320
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021e2fa>] do_page_fault+0xb/0xd
[   47.753026]  [<c05798f8>] error_code+0x58/0x60
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c0239765>] ? kthread_data+0xa/0xe
[   47.753026]  [<c0236866>] ? wq_worker_sleeping+0xb/0x78
[   47.753026]  [<c05768b4>] __schedule+0xda/0x587
[   47.753026]  [<c0391e32>] ? put_io_context_active+0x6d/0x95
[   47.753026]  [<c0576eb2>] schedule+0x72/0x89
[   47.753026]  [<c02291f8>] do_exit+0x6cc/0x71d
[   47.753026]  [<c0203576>] oops_end+0x69/0x70
[   47.753026]  [<c021dcdb>] no_context+0x1bb/0x1c5
[   47.753026]  [<c021de1b>] __bad_area_nosemaphore+0x136/0x140
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021de32>] bad_area_nosemaphore+0xd/0x10
[   47.753026]  [<c021e0a1>] __do_page_fault+0x26c/0x320
[   47.753026]  [<c03b9160>] ? debug_smp_processor_id+0x12/0x16
[   47.753026]  [<c02015e2>] ? __switch_to+0x24/0x40e
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c021e2fa>] do_page_fault+0xb/0xd
[   47.753026]  [<c05798f8>] error_code+0x58/0x60
[   47.753026]  [<c021e2ef>] ? vmalloc_sync_all+0x19a/0x19a
[   47.753026]  [<c03b59d2>] ? rhashtable_walk_init+0x5c/0x93
[   47.753026]  [<f9843221>] mesh_path_tbl_expire.isra.24+0x19/0x82 [mac80211]
[   47.753026]  [<f984408b>] mesh_path_expire+0x11/0x1f [mac80211]
[   47.753026]  [<f9842bb7>] ieee80211_mesh_work+0x73/0x1a9 [mac80211]
[   47.753026]  [<f98207d1>] ieee80211_iface_work+0x2ff/0x311 [mac80211]
[   47.753026]  [<c0235fa3>] process_one_work+0x14b/0x24e
[   47.753026]  [<c0236313>] worker_thread+0x249/0x343
[   47.753026]  [<c02360ca>] ? process_scheduled_works+0x24/0x24
[   47.753026]  [<c0239359>] kthread+0x9e/0xa3
[   47.753026]  [<c0578e50>] ret_from_kernel_thread+0x20/0x40
[   47.753026]  [<c02392bb>] ? kthread_parkme+0x18/0x18
[   47.753026] Code: 6b c0 85 c0 75 05 e8 fb 74 fc ff 89 f8 84 c0 75 08 8d 45 e8 e8 34 dd 33 00 83 c4 28 5b 5e 5f 5d c3 55 8b 80 10 02 00 00 89 e5 5d <8b> 40 f0 c3 55 b9 04 00 00 00 89 e5 52 8b 90 10 02 00 00 8d 45
[   47.753026] EIP: [<c0239765>] kthread_data+0xa/0xe SS:ESP 0068:f6463a78
[   47.753026] CR2: 00000000fffffff0
[   47.753026] ---[ end trace 867ca0bdd0767790 ]---

Fixes: 3b302ada7f0a ("mac80211: mesh: move path tables into if_mesh")
Reported-by: Fred Veldini <fred.veldini@gmail.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-04-05 21:34:53 +02:00
Michal Kazior
f2ac7e301a mac80211: expose txq queue depth and size to drivers
This will allow drivers to make more educated
decisions whether to defer transmission or not.

Relying on wake_tx_queue() call count implicitly
was not possible because it could be called
without queued frame count actually changing on
software tx aggregation start/stop code paths.

It was also not possible to know how long
byte-wise queue was without dequeueing.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-02-24 09:04:30 +01:00
Michal Kazior
2a58d42c1e mac80211: fix txq queue related crashes
The driver can access the queue simultanously
while mac80211 tears down the interface. Without
spinlock protection this could lead to corrupting
sk_buff_head and subsequently to an invalid
pointer dereference.

Fixes: ba8c3d6f16 ("mac80211: add an intermediate software queue implementation")
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-02-24 09:04:26 +01:00
Sara Sharon
23a1f8d44c mac80211: process and save VHT MU-MIMO group frame
The Group ID Management frame is an Action frame of
category VHT. It is transmitted by the AP to assign
or change the user position of a STA for one or more
group IDs.
Process and save the group membership data. Notify
underlying driver of changes.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-01-14 11:13:10 +01:00
Eliad Peller
835112b289 mac80211: don't teardown sdata on sdata stop
Interfaces are being initialized (setup) on addition,
and torn down on removal.

However, p2p device is being torn down when stopped,
resulting in the next p2p start operation being done
on uninitialized interface.

Solve it by calling ieee80211_teardown_sdata() only
on interface removal (for the non-netdev case).

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
[squashed in fix to call teardown after unregister]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-12-02 22:27:27 +01:00
Emmanuel Grumbach
5ad11b50fd mac80211: ensure we don't update tx power on a non-running sdata
We can't update the Tx power on the device unless it is
running.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=101521.

Cc: stable@vger.kernel.org
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-11-20 11:38:50 +01:00
Johannes Berg
cec6628350 mac80211: make enable_qos parameter to ieee80211_set_wmm_default()
The function currently determines this value, for use in bss_info.qos,
based on the interface type itself. Make it a parameter instead and
set it with the same logic for now.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-11-03 10:55:55 +01:00
Johannes Berg
4a733ef1be mac80211: remove PM-QoS listener
As this API has never really seen any use and most drivers don't
ever use the value derived from it, remove it.

Change the only driver using it (rt2x00) to simply use the DTIM
period instead of the "max sleep" time.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-10-14 18:04:08 +02:00
Andrei Otcheretianski
fc58c47ef1 mac80211: process skb_queue while scanning in HW
Queued frames aren't processed during scan, which results in an inability
to complete the BA session establishment until the scan ends. Since we
can't tx frames until the BA agreement setup is complete, it might result
in a very large latency during scan.
Fix this by allowing to process queued skbs while scanning in HW. This
should be ok since the devices which support hw scan should be able
to handle tx/rx while scanning.
During SW scan, mac80211 drops any txed frames besides probes and NDPs,
so it is still needed to delay processing of the queued frames till the
SW scan is done.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-09-22 15:21:20 +02:00
Lorenzo Bianconi
b119ad6e72 mac80211: add rate mask logic for vht rates
Define rc_rateidx_vht_mcs_mask array and rate_idx_match_vht_mcs_mask()
method in order to apply mcs mask for vht rates

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-08-14 17:49:51 +02:00
Arik Nemtsov
c8ff71e667 mac80211: TDLS: handle chan-switch in RTNL locked work
Move TDLS channel-switch Rx handling into an RTNL locked work. This is
required to add proper regulatory checking to incoming channel-switch
requests.
Queue incoming requests in a dedicated skb queue and handle the request
in a device-specific work to avoid deadlocking on interface removal.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-07-17 15:40:15 +02:00