Commit Graph

411 Commits

Author SHA1 Message Date
Eric Dumazet
87757a917b net: force a list_del() in unregister_netdevice_many()
unregister_netdevice_many() API is error prone and we had too
many bugs because of dangling LIST_HEAD on stacks.

See commit f87e6f4793 ("net: dont leave active on stack LIST_HEAD")

In fact, instead of making sure no caller leaves an active list_head,
just force a list_del() in the callee. No one seems to need to access
the list after unregister_netdevice_many()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-08 14:15:14 -07:00
Avraham Stern
d3a58df87a mac80211: set new interfaces as idle upon init
Mark new interfaces as idle to allow operations that require that
interfaces are idle to take place. Interface types that are always
not idle (like AP interfaces) will be set as not idle when they are
assigned a channel context.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Emmanuel Grumbach<emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-05-28 16:22:49 +02:00
Emmanuel Grumbach
34171dc0d6 mac80211: fix virtual monitor interface addition
Since the commit below, cfg80211_chandef_dfs_required()
will warn if it gets a an NL80211_IFTYPE_UNSPECIFIED iftype
as explicitely written in the commit log.
When an virtual monitor interface is added, its type is set
in ieee80211_sub_if_data.vif.type, but not in
ieee80211_sub_if_data.wdev.iftype which is passed to
cfg80211_chandef_dfs_required() hence resulting in the
following warning:

WARNING: CPU: 1 PID: 21265 at net/wireless/chan.c:376 cfg80211_chandef_dfs_required+0xbc/0x130 [cfg80211]()
Modules linked in: [...]
CPU: 1 PID: 21265 Comm: ifconfig Tainted: G        W  O 3.13.11+ #12
Hardware name: Dell Inc. Latitude E6410/0667CC, BIOS A01 03/05/2010
 0000000000000009 ffff88008f5fdb08 ffffffff817d4219 ffff88008f5fdb50
 ffff88008f5fdb40 ffffffff8106f57d 0000000000000000 0000000000000000
 ffff880081062fb8 ffff8800810604e0 0000000000000001 ffff88008f5fdba0
Call Trace:
 [<ffffffff817d4219>] dump_stack+0x4d/0x66
 [<ffffffff8106f57d>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff8106f5ec>] warn_slowpath_fmt+0x4c/0x50
 [<ffffffffa04ea4ec>] cfg80211_chandef_dfs_required+0xbc/0x130 [cfg80211]
 [<ffffffffa06b1024>] ieee80211_vif_use_channel+0x94/0x500 [mac80211]
 [<ffffffffa0684e6b>] ieee80211_add_virtual_monitor+0x1ab/0x5c0 [mac80211]
 [<ffffffffa0686ae5>] ieee80211_do_open+0xe75/0x1580 [mac80211]
 [<ffffffffa0687259>] ieee80211_open+0x69/0x70 [mac80211]
[snip]

Fixes: 00ec75fc5a ("cfg80211: pass the actual iftype when calling cfg80211_chandef_dfs_required()")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Acked-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-05-26 11:04:42 +02:00
Michal Kazior
59af6928d2 mac80211: fix CSA tx queue stopping
It was possible for tx queues to be stuck stopped
if AP CSA finalization failed. In that case
neither stop_ap nor do_stop woke the queues up.
This means it was impossible to perform tx at all
until driver was reloaded or a successful CSA was
performed later.

It was possible to solve this in a simpler manner
however this is more robust and future proof
(having multi-vif CSA in mind).

New sdata->csa_block_tx is introduced to keep
track of which interfaces requested tx to be
blocked for CSA. This is required because mac80211
stops all tx queues for that purpose. This means
queues must be awoken only when last tx-blocking
CSA interface is finished.

It is still possible to have tx queues stopped
after CSA failure but as soon as offending
interfaces are stopped from userspace (stop_ap or
ifdown) tx queues are woken up properly.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-05-06 15:10:00 +02:00
Zhao, Gang
8bd811aa6c mac80211: change return value of notifier function
Return NOTIFY_DONE if we don't care this time's notification, return
NOTIFY_OK if we successfully handled this time's notification. That's
the formal way to do it.

Signed-off-by: Zhao, Gang <gamerh2o@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-25 17:34:25 +02:00
Michal Kazior
e3afb92022 mac80211: track reserved vifs in chanctx
This can be useful. Provides a more straghtforward
way to iterate over interfaces taking part in
chanctx reservation and allows tracking chanctx
usage explicitly.

The structure is protected by local->chanctx_mtx.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-25 17:08:29 +02:00
Michal Kazior
484298ad1a mac80211: track assigned vifs in chanctx
This can be useful. Provides a more straghtforward
way to iterate over interfaces bound to a given
chanctx and allows tracking chanctx usage
explicitly.

The structure is protected by local->chanctx_mtx.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-25 17:08:29 +02:00
Michal Kazior
4e141dad26 mac80211: protect AP VLAN list with local->mtx
It was impossible to change chanctx of master AP
for AP VLANs because the copy function requires
RTNL which can't be simply taken in mac80211 code
due to possible deadlocks.

This is required for future chanctx reservation
that re-bind vifs to new chanctx. This requires
safe AP VLAN iteration without RTNL.

Now VLANs can be iterated while holding either
RTNL or local->mtx because the list is modified
while holding both of these locks.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:49 +02:00
Luciano Coelho
b6a550156b cfg80211/mac80211: move more combination checks to mac80211
Get rid of the cfg80211_can_add_interface() and
cfg80211_can_change_interface() functions by moving that functionality
to mac80211.  With this patch all interface combination checks are now
out of cfg80211 (except for the channel switch case which will be
addressed in a future commit).

Additionally, modify the ieee80211_check_combinations() function so
that an undefined chandef can be passed, in order to use it before a
channel is defined.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:47 +02:00
Monam Agarwal
0c2bef4621 mac80211: use RCU_INIT_POINTER
rcu_assign_pointer() ensures that the initialization of a structure is
carried out before storing a pointer to that structure. However, in the
case that NULL is assigned there's no structure to initialize so using
RCU_INIT_POINTER instead is safe and more efficient.

Signed-off-by: Monam Agarwal <monamagarwal123@gmail.com>
[squash eight tiny patches, rewrite commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:30 +02:00
John W. Linville
42775a34d2 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
Conflicts:
	drivers/net/wireless/ath/ath9k/recv.c
2014-03-13 14:21:43 -04:00
John W. Linville
88daf80dcc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2014-02-20 15:02:02 -05:00
Johannes Berg
bf5f48339a Merge remote-tracking branch 'wireless-next/master' into mac80211-next 2014-02-20 11:55:12 +01:00
Daniel Borkmann
99932d4fc0 netdevice: add queue selection fallback handler for ndo_select_queue
Add a new argument for ndo_select_queue() callback that passes a
fallback handler. This gets invoked through netdev_pick_tx();
fallback handler is currently __netdev_pick_tx() as most drivers
invoke this function within their customized implementation in
case for skbs that don't need any special handling. This fallback
handler can then be replaced on other call-sites with different
queue selection methods (e.g. in packet sockets, pktgen etc).

This also has the nice side-effect that __netdev_pick_tx() is
then only invoked from netdev_pick_tx() and export of that
function to modules can be undone.

Suggested-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-17 00:36:34 -05:00
John W. Linville
0e028ab0fb Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2014-02-13 14:43:02 -05:00
Johannes Berg
1d5e1266cf mac80211: simplify roc check in idle calculation
There's no need to start iterating the list only to break on the
first item, just use !list_empty() and also simplify the whole
conditional into a single expression.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-02-12 11:29:32 +01:00
Johannes Berg
fab57a6cc2 mac80211: fix virtual monitor interface iteration
During channel context assignment, the interface should
be found by interface iteration, so we need to assign the
pointer before the channel context.

Reported-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Tested-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-02-06 09:55:22 +01:00
Emmanuel Grumbach
8ffcc704c9 mac80211: avoid deadlock revealed by lockdep
sdata->u.ap.request_smps_work can’t be flushed synchronously
under wdev_lock(wdev) since ieee80211_request_smps_ap_work
itself locks the same lock.
While at it, reset the driver_smps_mode when the ap is
stopped to its default: OFF.

This solves:

======================================================
[ INFO: possible circular locking dependency detected ]
3.12.0-ipeer+ #2 Tainted: G           O
-------------------------------------------------------
rmmod/2867 is trying to acquire lock:
  ((&sdata->u.ap.request_smps_work)){+.+...}, at: [<c105b8d0>] flush_work+0x0/0x90

but task is already holding lock:
  (&wdev->mtx){+.+.+.}, at: [<f9b32626>] cfg80211_stop_ap+0x26/0x230 [cfg80211]

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #1 (&wdev->mtx){+.+.+.}:
        [<c10aefa9>] lock_acquire+0x79/0xe0
        [<c1607a1a>] mutex_lock_nested+0x4a/0x360
        [<fb06288b>] ieee80211_request_smps_ap_work+0x2b/0x50 [mac80211]
        [<c105cdd8>] process_one_work+0x198/0x450
        [<c105d469>] worker_thread+0xf9/0x320
        [<c10669ff>] kthread+0x9f/0xb0
        [<c1613397>] ret_from_kernel_thread+0x1b/0x28

-> #0 ((&sdata->u.ap.request_smps_work)){+.+...}:
        [<c10ae9df>] __lock_acquire+0x183f/0x1910
        [<c10aefa9>] lock_acquire+0x79/0xe0
        [<c105b917>] flush_work+0x47/0x90
        [<c105d867>] __cancel_work_timer+0x67/0xe0
        [<c105d90f>] cancel_work_sync+0xf/0x20
        [<fb0765cc>] ieee80211_stop_ap+0x8c/0x340 [mac80211]
        [<f9b3268c>] cfg80211_stop_ap+0x8c/0x230 [cfg80211]
        [<f9b0d8f9>] cfg80211_leave+0x79/0x100 [cfg80211]
        [<f9b0da72>] cfg80211_netdev_notifier_call+0xf2/0x4f0 [cfg80211]
        [<c160f2c9>] notifier_call_chain+0x59/0x130
        [<c106c6de>] __raw_notifier_call_chain+0x1e/0x30
        [<c106c70f>] raw_notifier_call_chain+0x1f/0x30
        [<c14f8213>] call_netdevice_notifiers_info+0x33/0x70
        [<c14f8263>] call_netdevice_notifiers+0x13/0x20
        [<c14f82a4>] __dev_close_many+0x34/0xb0
        [<c14f83fe>] dev_close_many+0x6e/0xc0
        [<c14f9c77>] rollback_registered_many+0xa7/0x1f0
        [<c14f9dd4>] unregister_netdevice_many+0x14/0x60
        [<fb06f4d9>] ieee80211_remove_interfaces+0xe9/0x170 [mac80211]
        [<fb055116>] ieee80211_unregister_hw+0x56/0x110 [mac80211]
        [<fa3e9396>] iwl_op_mode_mvm_stop+0x26/0xe0 [iwlmvm]
        [<f9b9d8ca>] _iwl_op_mode_stop+0x3a/0x70 [iwlwifi]
        [<f9b9d96f>] iwl_opmode_deregister+0x6f/0x90 [iwlwifi]
        [<fa405179>] __exit_compat+0xd/0x19 [iwlmvm]
        [<c10b8bf9>] SyS_delete_module+0x179/0x2b0
        [<c1613421>] sysenter_do_call+0x12/0x32

Fixes: 687da13223 ("mac80211: implement SMPS for AP")
Cc: <stable@vger.kernel.org> [3.13]
Reported-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-02-06 09:55:18 +01:00
Michal Kazior
dbd72850dc mac80211: add missing CSA locking
The patch adds a missing sdata lock and adds a few
lockdeps for easier maintenance.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-02-04 21:58:11 +01:00
David S. Miller
0a379e21c5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-01-14 14:42:42 -08:00
Jason Wang
f663dd9aaf net: core: explicitly select a txq before doing l2 forwarding
Currently, the tx queue were selected implicitly in ndo_dfwd_start_xmit(). The
will cause several issues:

- NETIF_F_LLTX were removed for macvlan, so txq lock were done for macvlan
  instead of lower device which misses the necessary txq synchronization for
  lower device such as txq stopping or frozen required by dev watchdog or
  control path.
- dev_hard_start_xmit() was called with NULL txq which bypasses the net device
  watchdog.
- dev_hard_start_xmit() does not check txq everywhere which will lead a crash
  when tso is disabled for lower device.

Fix this by explicitly introducing a new param for .ndo_select_queue() for just
selecting queues in the case of l2 forwarding offload. netdev_pick_tx() was also
extended to accept this parameter and dev_queue_xmit_accel() was used to do l2
forwarding transmission.

With this fixes, NETIF_F_LLTX could be preserved for macvlan and there's no need
to check txq against NULL in dev_hard_start_xmit(). Also there's no need to keep
a dedicated ndo_dfwd_start_xmit() and we can just reuse the code of
dev_queue_xmit() to do the transmission.

In the future, it was also required for macvtap l2 forwarding support since it
provides a necessary synchronization method.

Cc: John Fastabend <john.r.fastabend@intel.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: e1000-devel@lists.sourceforge.net
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-10 13:23:08 -05:00
John W. Linville
235f939228 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
Conflicts:
	net/ieee802154/6lowpan.c
2014-01-10 10:59:40 -05:00
John W. Linville
ad86c55bac Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2014-01-01 15:39:56 -05:00
dingtianhong
496d7e8ea3 mac8011: slight optimization of addr compare
Use the possibly more efficient ether_addr_equal
to instead of memcmp.

Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: John W. Linville <linville@tuxdriver.com>
Cc: David Miller <davem@davemloft.net>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Wang Weidong <wangweidong1@huawei.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-26 13:31:34 -05:00
Johannes Berg
34a3740d6b mac80211: fix iflist_mtx/mtx locking in radar detection
The scan code creates an iflist_mtx -> mtx locking dependency,
and a few other places, notably radar detection, were creating
the opposite dependency, causing lockdep to complain. As scan
and radar detection are mutually exclusive, the deadlock can't
really happen in practice, but it's still bad form.

A similar issue exists in the monitor mode code, but this is
only used by channel-context drivers right now and those have
to have hardware scan, so that also can't happen.

Still, fix these issues by making some of the channel context
code require the mtx to be held rather than acquiring it, thus
allowing the monitor/radar callers to keep the iflist_mtx->mtx
lock ordering.

While at it, also fix access to the local->scanning variable
in the radar code, and document that radar_detect_enabled is
now properly protected by the mtx.

All this would now introduce an ABBA deadlock between the DFS
work cancelling and local->mtx, so change the locking there a
bit to not need to use cancel_delayed_work_sync() but be able
to just use cancel_delayed_work(). The work is also safely
stopped/removed when the interface is stopped, so no extra
changes are needed.

Reported-by: Kalle Valo <kvalo@qca.qualcomm.com>
Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-19 13:33:33 +01:00
Johannes Berg
6924d0138a mac80211: remove unnecessary iflist_mtx locking
The radar detection code changed a few times, and due to
the changes some iflist_mtx locking stayed in that isn't
actually necessary - remove it.

One version of the code needed it because an AP interface's
VLAN list was changed to use this, but then we moved the
list handling outside of the chanctx handling and thus the
locking was no longer needed.

Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-19 13:33:13 +01:00
Johannes Berg
7907c7d33c mac80211: free all AP/VLAN keys at once
When the AP interface is stopped, free all AP and VLAN keys at
once to only require synchronize_net() once. Since that does
synchronize_net(), also move two such calls into the function
(using the new force_synchronize parameter) to avoid doing it
twice.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-16 11:29:48 +01:00
Johannes Berg
d34ba2168a mac80211: don't delay station destruction
If we can assume that stations are never referenced by the
driver after sta_state returns (and this is true since the
previous iwlmvm patch and for all other drivers) then we
don't need to delay station destruction, and don't need to
play tricks with rcu_barrier() etc.

This should speed up some scenarios like hostapd shutdown.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-16 11:29:45 +01:00
Johannes Berg
c4de673b77 Merge remote-tracking branch 'wireless-next/master' into mac80211-next 2013-12-16 11:23:45 +01:00
John W. Linville
e08fd975bf Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
Conflicts:
	drivers/net/wireless/brcm80211/Kconfig
	net/mac80211/util.c
2013-12-06 09:50:45 -05:00
Johannes Berg
18cfd3bfc9 Revert "mac80211: add driver callback for per-interface multicast filter"
This reverts commit 488b366a45.

The code isn't used by anyone, and the Intel driver isn't planning
to use it either right now.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-03 13:21:55 +01:00
Johannes Berg
2ce6a0f554 mac80211: remove sta_info_flush() from interface teardown
All interface types now properly clean up their stations
using some form of sta_info_flush() themselves, so there's
no need to try it again at teardown. Remove the call to
get rid of the extra delay from the synchronize_net() and
rcu_barrier() calls.

Reported-by: Moshe Benji <moshe.benji@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-02 11:51:50 +01:00
Max Stepanov
2475b1cc0d mac80211: add generic cipher scheme support
This adds generic cipher scheme support to mac80211, such schemes
are fully under control by the driver. On hw registration drivers
may specify additional HW ciphers with a scheme how these ciphers
have to be handled by mac80211 TX/RR. A cipher scheme specifies a
cipher suite value, a size of the security header to be added to
or stripped from frames and how the PN is to be verified on RX.

Signed-off-by: Max Stepanov <Max.Stepanov@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-11-25 20:50:52 +01:00
Janusz Dziedzic
d2859df5e7 cfg80211/mac80211: DFS setup chandef for cac event
To report channel width correctly we have
to send correct channel parameters from
mac80211 when calling cfg80211_cac_event().

This is required in case of using channel width
higher than 20MHz and we have to set correct
dfs channel state after CAC (NL80211_DFS_AVAILABLE).

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Reviewed-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-11-25 20:50:46 +01:00
Felix Fietkau
57fb089f48 mac80211: fix crash when using AP VLAN interfaces
Commit "mac80211: implement SMPS for AP" applies to AP_VLAN as well.
It assumes that sta->sdata->vif.bss_conf.bssid is present, which did not
get set for AP_VLAN.
Initialize it to sdata->vif.addr like for other interface types.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-11-25 16:50:08 +01:00
Emmanuel Grumbach
687da13223 mac80211: implement SMPS for AP
When the driver requests to move to STATIC or DYNAMIC SMPS,
we send an action frame to each associated station and
reconfigure the channel context / driver.
Of course, non-MIMO stations are ignored.

The beacon isn't updated. The association response will
include the original capabilities. Stations that associate
while in non-OFF SMPS mode will get an action frame right
after association to inform them about our current state.
Note that we wait until the end of the EAPOL. Sending an
action frame before the EAPOL is finished can be an issue
for a few clients. Clients aren't likely to send EAPOL
frames in MIMO anyway.

When the SMPS configuration gets more permissive (e.g.
STATIC -> OFF), we don't wake up stations that are asleep
We remember that they don't know about the change and send
the action frame when they wake up.

When the SMPS configuration gets more restrictive (e.g.
OFF -> STATIC), we set the TIM bit for every sleeping STA.
uAPSD stations might send MIMO until they poll the action
frame, but this is for a short period of time.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
[fix vht streams loop, initialisation]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-10-28 15:05:11 +01:00
Simon Wunderlich
cd7760e62c mac80211: add support for CSA in IBSS mode
This function adds the channel switch announcement implementation for the
IBSS code. It is triggered by userspace (mac80211/cfg) or by external
channel switch announcement, which have to be adopted. Both CSAs in
beacons and action frames are supported. As for AP mode, the channel
switch is applied after some time. However in IBSS mode, the channel
switch IEs are generated in the kernel.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-09-26 13:27:14 +02:00
Johannes Berg
a986553877 mac80211: fix change_interface queue assignments
Jouni reported that with mac80211_hwsim, multicast TX was causing
crashes due to invalid vif->cab_queue assignment. It turns out that
this is caused by change_interface() getting invoked and not having
the vif->type/vif->p2p assigned correctly before calling the queue
check (ieee80211_check_queues). Fix this by passing the 'external'
interface type to the function and adjusting it accordingly.

While at it, also fix the error path in change_interface, it wasn't
correctly resetting to the external type but using the internal one
instead.

Fortunately this affects on hwsim because all other drivers set the
vif->type/vif->p2p variables when changing iftype. This shouldn't
be needed, but almost all implementations actually do it for their
own internal handling.

Reported-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-08-26 09:52:58 +02:00
Simon Wunderlich
73da7d5bab mac80211: add channel switch command and beacon callbacks
The count field in CSA must be decremented with each beacon
transmitted. This patch implements the functionality for drivers
using ieee80211_beacon_get(). Other drivers must call back manually
after reaching count == 0.

This patch also contains the handling and finish worker for the channel
switch command, and mac80211/chanctx code to allow to change a channel
definition of an active channel context.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
[small cleanups, catch identical chandef]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-08-01 18:30:33 +02:00
Simon Wunderlich
0430c88347 cfg80211/mac80211: use reduced txpower for 5 and 10 MHz
Some regulations (like germany, but also FCC) express their transmission
power limit in dBm/MHz or mW/MHz. To cope with that and be on the safe
side, reduce the maximum power to half (10 MHz) or quarter (5 MHz)
when operating on these reduced bandwidth channels.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
2013-07-16 09:58:08 +03:00
John W. Linville
3899ba90a4 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
Conflicts:
	drivers/net/wireless/ath/ath9k/debug.c
	net/mac80211/iface.c
2013-06-11 14:48:32 -04:00
David S. Miller
6bc19fb82d Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Merge 'net' bug fixes into 'net-next' as we have patches
that will build on top of them.

This merge commit includes a change from Emil Goode
(emilgoode@gmail.com) that fixes a warning that would
have been introduced by this merge.  Specifically it
fixes the pingv6_ops method ipv6_chk_addr() to add a
"const" to the "struct net_device *dev" argument and
likewise update the dummy_ipv6_chk_addr() declaration.

Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-05 16:37:30 -07:00
Felix Fietkau
31eba5bc56 mac80211: support active monitor interfaces
Support them only if the driver advertises support for them via
IEEE80211_HW_SUPPORTS_ACTIVE_MONITOR. Unlike normal monitor interfaces,
they are added to the driver, along with their MAC address.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-05-29 09:11:56 +02:00
Jiri Pirko
351638e7de net: pass info struct via netdevice notifier
So far, only net_device * could be passed along with netdevice notifier
event. This patch provides a possibility to pass custom structure
able to provide info that event listener needs to know.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>

v2->v3: fix typo on simeth
	shortened dev_getter
	shortened notifier_info struct name
v1->v2: fix notifier_call parameter in call_netdevice_notifier()
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-05-28 13:11:01 -07:00
Helmut Schaa
ac20976dca mac80211: Allow single vif mac address change with addr_mask
When changing the MAC address of a single vif mac80211 will check if
the new address fits into the address mask specified by the driver.
This only needs to be done when using multiple BSSIDs. Hence, check
the new address only against all other vifs.

Also fix the MAC address assignment on new interfaces if the user
changed the address of a vif such that perm_addr is not covered by
addr_mask anymore.

Resolves:
https://bugzilla.kernel.org/show_bug.cgi?id=57371

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Jakub Kicinski <kubakici@wp.pl>
Reported-by: Alessandro Lannocca <alessandro.lannocca@gmail.com>
Cc: Alessandro Lannocca <alessandro.lannocca@gmail.com>
Cc: Bruno Randolf <br1@thinktube.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-05-27 11:26:48 +02:00
Johannes Berg
c8aa22db01 mac80211: close AP_VLAN interfaces before unregistering all
Since Eric's commit efe117ab8 ("Speedup ieee80211_remove_interfaces")
there's a bug in mac80211 when it unregisters with AP_VLAN interfaces
up. If the AP_VLAN interface was registered after the AP it belongs
to (which is the typical case) and then we get into this code path,
unregister_netdevice_many() will crash because it isn't prepared to
deal with interfaces being closed in the middle of it. Exactly this
happens though, because we iterate the list, find the AP master this
AP_VLAN belongs to and dev_close() the dependent VLANs. After this,
unregister_netdevice_many() won't pick up the fact that the AP_VLAN
is already down and will do it again, causing a crash.

Cc: stable@vger.kernel.org [2.6.33+]
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-05-27 11:26:47 +02:00
Johannes Berg
1351c5d3b1 mac80211: assign AP_VLAN hw queues correctly
A lot of code in mac80211 assumes that the hw queues are
set up correctly for all interfaces (except for monitor)
but this isn't true for AP_VLAN interfaces. Fix this by
copying the AP master configuration when an AP VLAN is
brought up, after this the AP interface can't change its
configuration any more and needs to be brought down to
change it, which also forces AP_VLAN interfaces down, so
just copying in open() is sufficient.

Reported-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-05-27 11:26:47 +02:00
Johannes Berg
4c8a9d4bfa mac80211: close AP_VLAN interfaces before unregistering all
Since Eric's commit efe117ab8 ("Speedup ieee80211_remove_interfaces")
there's a bug in mac80211 when it unregisters with AP_VLAN interfaces
up. If the AP_VLAN interface was registered after the AP it belongs
to (which is the typical case) and then we get into this code path,
unregister_netdevice_many() will crash because it isn't prepared to
deal with interfaces being closed in the middle of it. Exactly this
happens though, because we iterate the list, find the AP master this
AP_VLAN belongs to and dev_close() the dependent VLANs. After this,
unregister_netdevice_many() won't pick up the fact that the AP_VLAN
is already down and will do it again, causing a crash.

Cc: stable@vger.kernel.org [2.6.33+]
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-05-24 01:06:09 +02:00
Johannes Berg
5f38a11274 mac80211: assign AP_VLAN hw queues correctly
A lot of code in mac80211 assumes that the hw queues are
set up correctly for all interfaces (except for monitor)
but this isn't true for AP_VLAN interfaces. Fix this by
copying the AP master configuration when an AP VLAN is
brought up, after this the AP interface can't change its
configuration any more and needs to be brought down to
change it, which also forces AP_VLAN interfaces down, so
just copying in open() is sufficient.

Reported-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-05-23 23:11:33 +02:00
Johannes Berg
2b436312f0 mac80211: fix queue handling crash
The code I added in "mac80211: don't start new netdev queues
if driver stopped" crashes for monitor and AP VLAN interfaces
because while they have a netdev, they don't have queues set
up by the driver.

To fix the crash, exclude these from queue accounting here
and just start their netdev queues unconditionally.

For monitor, this is the best we can do, as we can redirect
frames there to any other interface and don't know which one
that will since it can be different for each frame.

For AP VLAN interfaces, we can do better later and actually
properly track the queue status. Not doing this is really a
separate bug though.

Reported-by: Ilan Peer <ilan.peer@intel.com>
Reported-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-05-23 21:04:38 +02:00
John W. Linville
ec094144cd Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
Conflicts:
	drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
2013-04-23 14:09:39 -04:00
Bob Copeland
8ceb59557b mac80211: use synchronize_rcu() with rcu_barrier()
The RCU docs used to state that rcu_barrier() included a wait
for an RCU grace period; however the comments for rcu_barrier()
as of commit f0a0e6f... "rcu: Clarify memory-ordering properties
of grace-period primitives" contradict this.

So add back synchronize_{rcu,net}() to where they once were,
but keep the rcu_barrier()s for the call_rcu() callbacks.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Bob Copeland <bob@cozybit.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-04-22 15:40:39 +02:00
John W. Linville
655d8e2328 Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Conflicts:
	drivers/net/wireless/ath/carl9170/debug.c
	drivers/net/wireless/ath/carl9170/main.c
	net/mac80211/ieee80211_i.h
2013-04-10 14:09:54 -04:00
John W. Linville
6fe5468f45 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
Conflicts:
	drivers/net/wireless/rt2x00/rt2x00pci.c
2013-04-10 09:31:39 -04:00
Johannes Berg
62a40a1555 mac80211: fix LED in idle handling
feng xiangjun reports that my

commit 382a103b2b
Author: Johannes Berg <johannes.berg@intel.com>
Date:   Fri Mar 22 22:30:09 2013 +0100

    mac80211: fix idle handling sequence

broke the wireless status LED. The reason is that
we now call ieee80211_idle_off() when the channel
context is assigned, and that doesn't recalculate
the LED state. Fix this by making that function a
wrapper around most of idle recalculation while
forcing active.

Reported-by: feng xiangjun <fengxj325@gmail.com>
Tested-by: feng xiangjun <fengxj325@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-04-08 13:12:05 +02:00
Johannes Berg
2b730daace mac80211: don't start new netdev queues if driver stopped
If a new netdev (e.g. an AP VLAN) is created while the driver
has queues stopped, the new netdev queues will be started even
though they shouldn't. This will lead to frames accumulating
on the internal mac80211 pending queues instead of properly
being held on the netdev queues.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-04-08 11:06:28 +02:00
Johannes Berg
a23108248a mac80211: replace some dead code by a warning
Given the (nested) switch statements, this code can't
be reached, so make it warn instead of manipulating
the carrier state which seems purposeful.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-04-08 11:06:24 +02:00
Johannes Berg
b2c0958b20 mac80211: fix do_stop handling while suspended
When a device is unplugged while suspended, mac80211 is
de-initialized and all interfaces are removed while no
state is actually present in the driver. This can cause
warnings and driver confusion.

Fix this by reordering the do_stop code to not call the
driver when it is suspended, i.e. when there's no state
in the driver anyway.

The previous patches removed a few corner cases in ROC
and virtual monitor interfaces so that now this is safe
to do and no state should be left over.

Reported-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-04-08 09:17:01 +02:00
Johannes Berg
3c3e21e744 mac80211: destroy virtual monitor interface across suspend
It has to be removed from the driver, but completely
destroying it helps handle unplug of a device during
suspend since then the channel context handling etc.
doesn't have to happen later when it's removed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-04-08 09:17:00 +02:00
Johannes Berg
c8f994eec2 mac80211: purge remain-on-channel items when suspending
They can't really be executed while suspended and could
trigger work warnings, so abort all ROC items. When the
system resumes the notifications about this will be
delivered to userspace which can then act accordingly
(though it will assume they were canceled/finished.)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-04-08 09:17:00 +02:00
Johannes Berg
afdc7c18e9 mac80211: remove outdated comment referring to master interface
The code now explicitly calls ieee80211_configure_filter()
anyway, so nothing needs to be explained.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-04-08 09:16:59 +02:00
Johannes Berg
c5d54fbf0e mac80211: remove ancient reference to master interface
The master interface no longer exists ... and hasn't for
a few years now, so remove this reference :-)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-04-08 09:16:55 +02:00
John W. Linville
9a574cd67a Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
Conflicts:
	net/mac80211/sta_info.c
	net/wireless/core.h
2013-03-29 16:41:36 -04:00
Johannes Berg
382a103b2b mac80211: fix idle handling sequence
Corey Richardson reported that my idle handling cleanup
(commit fd0f979a1b, "mac80211: simplify idle handling")
broke ath9k_htc. The reason appears to be that it wants
to go out of idle before switching channels. To fix it,
reimplement that sequence.

Reported-by: Corey Richardson <corey@octayn.net>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-25 16:50:18 +01:00
Johannes Berg
8b305780ed mac80211: fix virtual monitor interface locking
The virtual monitor interface has a locking issue, it calls
into the channel context code with the iflist mutex held
which isn't allowed since it is usually acquired the other
way around. The mutex is still required for the interface
iteration, but need not be held across the channel calls.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-20 22:26:35 +01:00
Johannes Berg
39ecc01d1b mac80211: pass queue bitmap to flush operation
There are a number of situations in which mac80211 only
really needs to flush queues for one virtual interface,
and in fact during this frames might be transmitted on
other virtual interfaces. Calculate and pass a queue
bitmap to the driver so it knows which queues to flush.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-18 20:15:03 +01:00
Stanislaw Gruszka
d260ff12e7 mac80211: remove vif debugfs driver callbacks
This basically reverts commit b207cdb07f.

Now is possible to use drv_{add,remove}_interface() and vif->debugfs_dir
to create/remove per interface debugfs files. Remove redundant
callbacks.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-18 20:10:05 +01:00
Alexander Bondar
488b366a45 mac80211: add driver callback for per-interface multicast filter
Some devices have multicast filter capability for each individual
virtual interface rather than just a global one. Add an interface
specific driver callback allowing such drivers to configure this.

Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-11 16:22:14 +02:00
Johannes Berg
1861b84553 mac80211: simplify AP interface stop
For AP interfaces, there's no need to flush stations
or keys again when the interface is stopped as already
happened when the BSS was stopped on the interface.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-06 16:36:01 +01:00
Johannes Berg
7b4396bd68 mac80211: flush keys when stopping AP
Since hostapd will remove keys this isn't usually
an issue, but we shouldn't leak keys to the next
BSS started on the same interface. For VLANs this
also fixes a bug, keys that aren't removed would
otherwise be leaked.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-06 16:36:00 +01:00
Johannes Berg
8d1f7ecd2a mac80211: defer tailroom counter manipulation when roaming
During roaming, the crypto_tx_tailroom_needed_cnt counter
will often take values 2,1,0,1,2 because first keys are
removed and then new keys are added. This is inefficient
because during the 0->1 transition, synchronize_net must
be called to avoid packet races, although typically no
packets would be flowing during that time.

To avoid that, defer the decrement (2->1, 1->0) when keys
are removed (by half a second). This means the counter
will really have the values 2,2,2,3,4 ... 2, thus never
reaching 0 and having to do the 0->1 transition.

Note that this patch entirely disregards the drivers for
which this optimisation was done to start with, for them
the key removal itself will be expensive because it has
to synchronize_net() after the counter is incremented to
remove the key from HW crypto. For them the sequence will
look like this: 0,1,0,1,0,1,0,1,0 (*) which is clearly a
lot more inefficient. This could be addressed separately,
during key removal the 0->1->0 sequence isn't necessary.

(*) it starts at 0 because HW crypto is on, then goes to
    1 when HW crypto is disabled for a key, then back to
    0 because the key is deleted; this happens for both
    keys in the example. When new keys are added, it goes
    to 1 first because they're added in software; when a
    key is moved to hardware it goes back to 0

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-06 16:36:00 +01:00
Stanislaw Gruszka
30c97120c6 mac80211: remove napi
Since two years no mac80211 driver implement support for NAPI. Looks
this feature is unneeded, so remove it from generic mac80211 code.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-06 16:35:54 +01:00
Felix Fietkau
801d929ca7 mac80211: another fix for idle handling in monitor mode
When setting a monitor interface up or down, the idle state needs to be
recalculated, otherwise the hardware will just stay in its previous idle
state.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-02 21:24:42 +01:00
Felix Fietkau
b759f4ddca mac80211: fix idle handling in monitor mode
When the driver does not want a monitor mode VIF, no channel context is
allocated for it. This causes ieee80211_recalc_idle to put the hardware
into idle mode if only a monitor mode is active, breaking injection.

Fix this by checking local->monitors in addition to active channel
contexts.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-26 21:53:01 +01:00
Johannes Berg
572078be54 mac80211: fix harmless station flush warning
If an interface is set down while authenticating or
associating, there's a station entry that will be
removed by the flushing in do_stop() and that will
cause a warning. It's otherwise harmless, but avoid
the warning by calling ieee80211_mgd_stop() first.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-18 13:48:40 +01:00
Bob Copeland
8ffb5c001a mac80211: enable vif.cab_queue for mesh
Since mesh powersaving was added, pending bcast/mcast frames may go out the
CAB queue now.  Unfortunately, the queue was only set up for AP mode, so we
would try to tx on the IEEE80211_INVAL_HW_QUEUE.  Allow cab_queue for mesh
interfaces as well.

Fixes the following warning (or crash without MAC80211_VERBOSE_DEBUG):

WARNING: at net/mac80211/tx.c:1223 __ieee80211_tx+0x162/0x35f [mac80211]()
Modules linked in: mac80211_hwsim mac80211 cfg80211 [...]
Pid: 3085, comm: avahi-daemon Tainted: G        W    3.8.0-rc1+ #377
Call Trace:
 [<ffffffff81045c20>] warn_slowpath_common+0x83/0x9c
 [<ffffffff81045c53>] warn_slowpath_null+0x1a/0x1c
 [<ffffffffa083aef0>] __ieee80211_tx+0x162/0x35f [mac80211]
 [<ffffffffa083cb1d>] ieee80211_tx+0xd3/0xf9 [mac80211]
 [<ffffffffa083cc0f>] ieee80211_xmit+0xcc/0xd5 [mac80211]
 [<ffffffffa083db59>] ieee80211_subif_start_xmit+0xc53/0xcd8 [mac80211]
 [<ffffffff81319acd>] dev_hard_start_xmit+0x259/0x3ce
 [<ffffffff81333d6b>] sch_direct_xmit+0x74/0x17d
 [<ffffffff8131a0b1>] dev_queue_xmit+0x230/0x414
 [<ffffffff8134877a>] ip_finish_output2+0x348/0x3aa
 [<ffffffff81349029>] ip_finish_output+0x6c/0x71
 [<ffffffff81349046>] NF_HOOK_COND.constprop.44+0x18/0x58
 [<ffffffff8134a03a>] ip_mc_output+0x134/0x13c
 [<ffffffff8134835a>] dst_output+0x18/0x1c
 [<ffffffff81349a24>] ip_local_out+0x20/0x24
 [<ffffffff8134a8cf>] ip_send_skb+0x16/0x3c
 [<ffffffff8136bfba>] udp_send_skb+0x254/0x2b9
 [<ffffffff8136c85e>] udp_sendmsg+0x5a8/0x7d4

Signed-off-by: Bob Copeland <bob@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-15 16:43:58 +01:00
Michael Braun
397a7a24ef mac80211: free ps->bc_buf skbs on vlan device stop
When the vlan device is removed, ps->bc_buf processing can no longer
send its frames.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-15 09:41:08 +01:00
Simon Wunderlich
164eb02d07 mac80211: add radar detection command/event
Add command to trigger radar detection in the driver/FW.
Once radar detection is started it should continuously
monitor for radars as long as the channel active.
If radar is detected usermode notified with 'radar
detected' event.

Scanning and remain on channel functionality must be disabled
while doing radar detection/scanning, and vice versa.

Based on original patch by Victor Goldenshtein <victorg@ti.com>

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-15 09:41:04 +01:00
Johannes Berg
fd0f979a1b mac80211: simplify idle handling
Now that we have channel contexts, idle is (pretty
much) equivalent to not having a channel context.
Change the code to use this relation so that there
no longer is a need for a lot of idle recalculate
calls everywhere.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-11 18:45:01 +01:00
Johannes Berg
f1e3e05156 mac80211: remove IEEE80211_HW_SCAN_WHILE_IDLE
There are only a few drivers that use HW scan, and
all of those don't need a non-idle transition before
starting the scan -- some don't even care about idle
at all. Remove the flag and code associated with it.

The only driver that really actually needed this is
wl1251 and it can just do it itself in the hw_scan
callback -- implement that.

Acked-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-11 18:45:01 +01:00
Alexander Bondar
b207cdb07f mac80211: add vif debugfs driver callbacks
Add debugfs driver callbacks so drivers can add
debugfs entries for interfaces. Note that they
_must_ remove the entries again as add/remove in
the driver doesn't correspond to add/remove in
debugfs; the former is up/down while the latter
is netdev create/destroy.

Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-11 18:44:58 +01:00
Johannes Berg
0f19b41e22 mac80211: remove ARP filter enable/disable logic
Depending on the driver, having ARP filtering for
some addresses may be possible. Remove the logic
that tracks whether ARP filter is enabled or not
and give the driver the total number of addresses
instead of the length of the list so it can make
its own decision.

Reviewed-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-18 21:20:34 +01:00
Johannes Berg
ad2d223aa9 mac80211: assign bss_conf.bssid only once
Instead of checking every time bss_info_changed is called,
assign the pointer once depending on the interface type
and then leave it untouched until the interface type is
changed. This makes the ieee80211_bss_info_change_notify()
now a simple wrapper to call the driver only.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03 13:01:37 +01:00
Johannes Berg
75de9113bb mac80211: optimise AP stop RCU handling
If there are VLANs, stopping an AP is inefficient as it
calls rcu_barrier() once for each interface (the VLANs
and the AP itself). Optimise this by moving rcu_barrier()
out of the station cleanups and calling it only once for
all interfaces combined.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03 13:01:31 +01:00
Johannes Berg
051007d9e2 mac80211: optimise roaming time again
The last fixes re-added the RCU synchronize penalty
on roaming to fix the races. Split up sta_info_flush()
now to get rid of that again, and let managed mode
(and only it) delay the actual destruction.

Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03 13:01:17 +01:00
Johannes Berg
09f4114e02 mac80211: warn if unexpectedly removing stations
When an interface is brought down it must have been
disconnected (or similar) in all modes other than WDS,
so warn if any stations were removed in other modes.

Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03 13:01:17 +01:00
Johannes Berg
b998e8bb3e mac80211: remove final sta_info_flush()
When all interfaces have been removed, there can't
be any stations left over, so there's no need to
flush again. Remove this, and all code associated
with it, which also simplifies the function.

Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03 13:01:16 +01:00
Chaitanya
09b1426e7f mac80211: fix maximum MTU
The maximum MTU shouldn't take the headers into account,
the maximum MSDU size is exactly the maximum MTU.

Signed-off-by: T Krishna Chaitanya <chaitanyatk@posedge.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03 13:00:01 +01:00
Johannes Berg
97f97b1f5f mac80211: fix station destruction in AP/mesh modes
Unfortunately, commit b22cfcfcae, intended to speed up roaming
by avoiding the synchronize_rcu() broke AP/mesh modes as it moved
some code into that work item that will still call into the driver
at a time where it's no longer expected to handle this: after the
AP or mesh has been stopped.

To fix this problem remove the per-station work struct, maintain a
station cleanup list instead and flush this list when stations are
flushed. To keep this patch smaller for stable, do this when the
stations are flushed (sta_info_flush()). This unfortunately brings
back the original roaming delay; I'll fix that again in a separate
patch.

Also, Ben reported that the original commit could sometimes (with
many interfaces) cause long delays when an interface is set down,
due to blocking on flush_workqueue(). Since we now maintain the
cleanup list, this particular change of the original patch can be
reverted.

Cc: stable@vger.kernel.org [3.7]
Reported-by: Ben Greear <greearb@candelatech.com>
Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03 12:59:59 +01:00
Johannes Berg
4d76d21bd7 mac80211: assign VLAN channel contexts
Make AP_VLAN type interfaces track the AP master channel
context so they have one assigned for the various lookups.
Don't give them their own refcount etc. since they're just
slaves to the AP master.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03 12:59:58 +01:00
Johannes Berg
0b7dff4fae mac80211: cancel work instead of waiting for it to do nothing
If the sdata work is pending while the interface is stopped,
we currently flush it. If it's not running this means waiting
for it to run, which could take a while if the workqueue is
backlogged. However, the work exits right away if it starts
to run while the interface is already stopping. There's no
point in waiting for that, so use cancel_work_sync() instead.

Reported-by: Ben Greear <greearb@candelatech.com>
Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-12-06 14:05:05 +01:00
Helmut Schaa
478622e81c mac80211: reject setting masked mac addresses
If a driver registers an address mask we should ensure that no
interface gets an address assigned that isn't covered by the
registered address mask. This prevents invalid configurations
from reaching the device and causing problems.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
[change function flow to reduce indentation, fix locking]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-28 13:52:43 +01:00
Johannes Berg
4bf88530be mac80211: convert to channel definition struct
Convert mac80211 (and where necessary, some drivers a
little bit) to the new channel definition struct.

This will allow extending mac80211 for VHT, which is
currently restricted to channel contexts since there
are no drivers using that which makes it easier. As
I also don't care about VHT for drivers not using the
channel context API, I won't convert the previous API
to VHT support.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-26 12:42:59 +01:00
Johannes Berg
1ea6f9c0d4 mac80211: handle TX power per virtual interface
Even before channel contexts/multi-channel, having a
single global TX power limit was already problematic,
in particular if two managed interfaces connected to
two APs with different power constraints. The channel
context introduction completely broke this though and
in fact I had disabled TX power configuration there
for drivers using channel contexts.

Change everything to track TX power per interface so
that different user settings and different channel
maxima are treated correctly. Also continue tracking
the global TX power though for compatibility with
applications that attempt to configure the wiphy's
TX power globally.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-30 09:11:34 +01:00
Johannes Berg
6fb47de9cf Merge remote-tracking branch 'wireless-next/master' into mac80211-next 2012-10-30 09:09:48 +01:00
Johannes Berg
7b20b8e8d7 mac80211: move AP teardown code to correct place
Since cfg80211 will now call the explicit stop_ap
operation when an AP interface goes down, move all
teardown code there and remove it from interface
handling. The only thing that needs to stay is the
code to dev_close() all dependent VLANs.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-26 12:57:01 +02:00
John W. Linville
9b34f40c20 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
Conflicts:
	drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
	net/mac80211/mlme.c
2012-10-23 11:41:46 -04:00
Marco Porsch
d012a60510 mac80211: make client powersave independent of interface type
This patch prepares mac80211 for a later implementation of mesh or
ad-hoc powersave clients.
The structures related to powersave (buffer, TIM map, counters) are
moved from the AP-specific interface structure to a generic structure
that can be embedded into any interface type.
The functions related to powersave are prepared to allow easy
extension with different interface types. For example with:

+ } else if (sta->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
+         ps = &sdata->u.mesh.ps;

Some references to the AP's beacon structure are removed where they
were obviously not used.

The patch compiles without warning and has been briefly tested as AP
interface with one client in PS mode.

Signed-off-by: Marco Porsch <marco.porsch@etit.tu-chemnitz.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-19 15:43:51 +02:00
Johannes Berg
04ecd2578e mac80211: track needed RX chains for channel contexts
On each channel that the device is operating on, it
may need to listen using one or more chains depending
on the SMPS settings of the interfaces using it. The
previous channel context changes completely removed
this ability (before, it was available as the SMPS
mode).

Add per-context tracking of the required static and
dynamic RX chains and notify the driver on changes.
To achieve this, track the chains and SMPS mode used
on each virtual interface and update the channel
context whenever this changes.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-17 11:02:09 +02:00
Johannes Berg
55de908ab2 mac80211: use channel contexts
Instead of operating on a single channel only,
use the new channel context infrastructure in
all mac80211 code.

This enables drivers that want to use the new
channel context infrastructure to use multiple
channels, while nothing should change for all
the other drivers that don't support it.

Right now this disables both TX power settings
and spatial multiplexing powersave. Both need
to be re-enabled on a channel context basis.

Additionally, when channel contexts are used
drop the connection when channel switch is
received rather than trying to handle it. This
will have to be improved later.

[With fixes from Eliad and Emmanuel incorporated]
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-17 11:02:09 +02:00
Felix Fietkau
d4fa14cd62 mac80211: use ieee80211_free_txskb in a few more places
Free tx status skbs when draining power save buffers, pending frames, or
when tearing down a vif.
Fixes remaining conditions that can lead to hostapd/wpa_supplicant hangs when
running out of socket write memory.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@vger.kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-10-15 14:45:50 -04:00
Eliad Peller
b22cfcfcae mac80211: use call_rcu() on sta deletion
mac80211 calls synchronize_rcu() on sta deletion,
which increase the roaming time significantly.

Convert it into a call_rcu() mechanism, in order
to avoid blocking. Since some of the cleanup
functions might sleep, schedule from the call_rcu
callback a new work that will do the actual cleanup.

In order to make sure the cleanup occurs before
the interface went down, flush local->workqueue
on ieee80211_do_stop().

Signed-off-by: Yoni Divinsky <yoni.divinsky@ti.com>
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-10 12:44:17 +02:00
Ilan Peer
0ef24e528f mac80211: Do not check for valid hw_queues for P2P_DEVICE
A P2P Device interface does not have a netdev, and is not
expected to be used for transmitting data, so there is no
need to assign hw queues for it.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-04 14:16:41 +02:00
Johannes Berg
6d71117a27 mac80211: add IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
Some devices like the current iwlwifi implementation
require that the P2P interface address match the P2P
Device address (only one P2P interface is supported.)
Add the HW flag IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
that allows drivers to request that P2P Interfaces
added while a P2P Device is active get the same MAC
address by default.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 13:58:23 +02:00
Johannes Berg
f142c6b906 mac80211: support P2P Device abstraction
After cfg80211 got a P2P Device abstraction, add
support to mac80211. Whether it really is supported
or not will depend on whether or not the driver has
support for it, but mac80211 needs to change to be
able to support drivers that need a P2P Device.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 13:58:22 +02:00
Johannes Berg
98104fdeda cfg80211: add P2P Device abstraction
In order to support using a different MAC address
for the P2P Device address we must first have a
P2P Device abstraction that can be assigned a MAC
address.

This abstraction will also be useful to support
offloading P2P operations to the device, e.g.
periodic listen for discoverability.

Currently, the driver is responsible for assigning
a MAC address to the P2P Device, but this could be
changed by allowing a MAC address to be given to
the NEW_INTERFACE command.

As it has no associated netdev, a P2P Device can
only be identified by its wdev identifier but the
previous patches allowed using the wdev identifier
in various APIs, e.g. remain-on-channel.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 13:58:21 +02:00
Eyal Shapira
aa7a00809c mac80211: avoid using synchronize_rcu in ieee80211_set_probe_resp
This could take a while (100ms+) and may delay sending assoc resp
in AP mode with WPS or P2P GO (as setting the probe resp takes place
there). We've encountered situations where the delay was big enough
to cause connection problems with devices like Galaxy Nexus.
Switch to using call_rcu with a free handler.

[Arik - rework to use plain buffer and instead of skb]

Signed-off-by: Eyal Shapira <eyal@wizery.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 13:20:56 +02:00
Thomas Pedersen
3e17f2be31 mac80211: remove ieee80211_clean_sdata()
This function was only used by mesh, and not really needed since any
interface-specific cleanup already happens in the netdev handlers.

Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-03 21:34:22 +02:00
Thomas Pedersen
0d466b9c67 mac80211: improve cleanup when leaving mesh
It is not necessary to stop the mesh beacon in the mac80211 ndo_stop
handler, since cfg80211 has already left the mesh on NETDEV_GOING_DOWN
notification.

Also some improvements to ieee80211_stop_mesh():

 - flush mpath entries.
 - flush sta entries per-sdata so we don't remove entries belonging to
   other vifs on the same hw.

Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-03 21:34:17 +02:00
Johannes Berg
1411af1565 mac80211: enable WDS carrier only after adding station
Enable the carrier on WDS type interfaces only
after having added the station entry for the
WDS peer so outgoing frames will find it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-07-31 16:19:01 +02:00
Johannes Berg
c405c6298e mac80211: manage carrier state in mesh
Instead of assuming the carrier is on all
the time in mesh manage it with joining
and leaving the mesh.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-07-31 16:18:59 +02:00
Johannes Berg
679ef4eadd mac80211: use oper_channel in utils and config
Using hw.conf.channel is wrong as it could be the
temporary channel if any function like the beacon
get function is called while scanning or during
other temporary out-of-channel activities.

Use oper_channel instead.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-07-31 16:18:55 +02:00
Johannes Berg
075e08477d Revert "mac80211: refactor virtual monitor code"
This reverts commit 870d37fc22.

This code doesn't work as cfg80211 will call
set_monitor_enabled at the wrong time and it
doesn't seem to be possible to fix this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-07-13 16:16:10 +02:00
Johannes Berg
685fb72b63 mac80211: iterate the virtual monitor interface
If the virtual monitor interface is requested
by the driver, it should also be iterated over
when the driver wants to iterate all active
interfaces.

To allow that protect it with the iflist_mtx.

Change-Id: I58ac5de2f4ce93d12c5a98ecd2859f60158d5d69
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-07-12 12:10:50 +02:00
Johannes Berg
e2fd5dbc1c mac80211: make scan_sdata pointer usable with RCU
Making the scan_sdata pointer usable with RCU makes
it possible to dereference it in the RX path to see
if a received frame actually matches the interface
that is scanning. This is just preparations, making
the pointer __rcu.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-07-12 12:10:43 +02:00
Johannes Berg
84efbb84cf cfg80211: use wireless_dev for interface management
In order to be able to create P2P Device wdevs, move
the virtual interface management over to wireless_dev
structures.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-07-12 12:08:10 +02:00
Michal Kazior
870d37fc22 mac80211: refactor virtual monitor code
Use cfg80211 the new .set_monitor_enabled instead
of tracking it inside mac80211.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-06-29 13:39:16 +02:00
Johannes Berg
cc45ae547b mac80211: make __ieee80211_recalc_idle static
Since it's not called from any file outside where
it's defined, the function can be static if moved
up in the file before the callers.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-06-26 12:04:05 +02:00
Johannes Berg
371a255e86 mac80211: make ieee80211_check_concurrent_iface netdev-independent
ieee80211_check_concurrent_iface() need not use the
netdev. Remove the use of the netdev here to prepare
the function for P2P device addition.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-06-26 09:37:25 +02:00
Johannes Berg
bdcbd8e0e3 mac80211: clean up debugging
There are a few things that make the logging and
debugging in mac80211 less useful than it should
be right now:
 * a lot of messages should be pr_info, not pr_debug
 * wholesale use of pr_debug makes it require *both*
   Kconfig and dynamic configuration
 * there are still a lot of ifdefs
 * the style is very inconsistent, sometimes the
   sdata->name is printed in front

Clean up everything, introducing new macros and
separating out the station MLME debugging into
a new Kconfig symbol.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-06-24 11:32:29 +02:00
Yoni Divinsky
00e96decfd mac80211: save wmm_acm per sdata
Save and configure the wmm_acm per sdata, rather than
per hardware.

If wmm_acm is saved per hardware when running two
interfaces simultaneously on the same hardware one
interface's wmm policy will be affected by the other
interface.

Signed-off-by: Yoni Divinsky <yoni.divinsky@ti.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-06-20 17:35:22 +02:00
Johannes Berg
2eb278e083 mac80211: unify SW/offload remain-on-channel
Redesign all the off-channel code, getting rid of
the generic off-channel work concept, replacing
it with a simple remain-on-channel list.

This fixes a number of small issues with the ROC
implementation:
 * offloaded remain-on-channel couldn't be queued,
   now we can queue it as well, if needed
 * in iwlwifi (the only user) offloaded ROC is
   mutually exclusive with scanning, use the new
   queue to handle that case -- I expect that it
   will later depend on a HW flag

The bigger issue though is that there's a bad bug
in the current implementation: if we get a mgmt
TX request while HW roc is active, and this new
request has a wait time, we actually schedule a
software ROC instead since we can't guarantee the
existing offloaded ROC will still be that long.
To fix this, the queuing mechanism was needed.

The queuing mechanism for offloaded ROC isn't yet
optimal, ideally we should add API to have the HW
extend the ROC if needed. We could add that later
but for now use a software implementation.

Overall, this unifies the behaviour between the
offloaded and software-implemented case as much
as possible.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-06-06 15:31:18 -04:00
Johannes Berg
196ac1c13d mac80211: do remain-on-channel while idle
The IDLE handling in HW off-channel is broken right
now since we turn off IDLE only when the off-channel
period already started. Therefore, all drivers that
use it today (only iwlwifi!) must support off-channel
while idle, so playing with idle isn't needed at all.

Off-channel in general, since it's no longer used for
authentication/association, shouldn't affect PS, so
also remove that logic.

Also document a small caveat for reporting TX status
from off-channel frames in HW remain-on-channel.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-06-06 15:20:33 -04:00
John W. Linville
7c9c46c16d Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
Conflicts:
	drivers/net/wireless/iwlwifi/iwl-drv.c
2012-06-06 14:40:06 -04:00
Joe Perches
f0d232080f net: mac80211: Convert printk(KERN_DEBUG to pr_debug
Standardize the debugging to be able to use dynamic_debug.

Coalesce formats, align arguments.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-06-05 15:27:16 -04:00
Arik Nemtsov
72d7872852 mac80211: allow low-level drivers to set netdev feature bits
Low level drivers can now set certain netdev feature bits in
netdev_features member of the ieee80211_hw struct. These will be
propagated to every netdev created from this HW.

The white-listed features currently include only ones related to HW
checksumming.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-06-05 15:21:46 -04:00
Johannes Berg
71ecfa1893 mac80211: clean up remain-on-channel on interface stop
When any interface goes down, it could be the one that we
were doing a remain-on-channel with. We therefore need to
cancel the remain-on-channel and flush the related work
structs so they don't run after the interface has been
removed or even destroyed.

It's also possible in this case that an off-channel SKB
was never transmitted, so free it if this is the case.
Note that this can also happen if the driver finishes
the off-channel period without ever starting it.

Cc: stable@kernel.org
Reported-by: Nirav Shah <nirav.j2.shah@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-06-04 15:25:26 -04:00
John W. Linville
a0d0d1685f Merge git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next 2012-05-22 15:18:06 -04:00
Johannes Berg
a9d3c05cca mac80211: fix single queue drivers
My queue management rework broke drivers that don't
have multiple AC queues and register a single queue
only, causing a warning:

WARNING: at net/mac80211/iface.c:162 ieee80211_check_queues

This was due to filling the queues wrongly and then
noticing the error when checking later.

Reported-and-Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-05-16 12:46:04 -04:00
Joe Perches
b203ca3912 mac80211: Convert compare_ether_addr to ether_addr_equal
Use the new bool function ether_addr_equal to add
some clarity and reduce the likelihood for misuse
of compare_ether_addr for sorting.

Done via cocci script:

$ cat compare_ether_addr.cocci
@@
expression a,b;
@@
-	!compare_ether_addr(a, b)
+	ether_addr_equal(a, b)

@@
expression a,b;
@@
-	compare_ether_addr(a, b)
+	!ether_addr_equal(a, b)

@@
expression a,b;
@@
-	!ether_addr_equal(a, b) == 0
+	ether_addr_equal(a, b)

@@
expression a,b;
@@
-	!ether_addr_equal(a, b) != 0
+	!ether_addr_equal(a, b)

@@
expression a,b;
@@
-	ether_addr_equal(a, b) == 0
+	!ether_addr_equal(a, b)

@@
expression a,b;
@@
-	ether_addr_equal(a, b) != 0
+	ether_addr_equal(a, b)

@@
expression a,b;
@@
-	!!ether_addr_equal(a, b)
+	ether_addr_equal(a, b)

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-09 20:49:18 -04:00
David S. Miller
0d6c4a2e46 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/ethernet/intel/e1000e/param.c
	drivers/net/wireless/iwlwifi/iwl-agn-rx.c
	drivers/net/wireless/iwlwifi/iwl-trans-pcie-rx.c
	drivers/net/wireless/iwlwifi/iwl-trans.h

Resolved the iwlwifi conflict with mainline using 3-way diff posted
by John Linville and Stephen Rothwell.  In 'net' we added a bug
fix to make iwlwifi report a more accurate skb->truesize but this
conflicted with RX path changes that happened meanwhile in net-next.

In e1000e a conflict arose in the validation code for settings of
adapter->itr.  'net-next' had more sophisticated logic so that
logic was used.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 23:35:40 -04:00
Andrei Emeltchenko
94c514fe24 mac80211: Adds clean sdata helper
Adds hepler to clean sdata ieee80211_clean_sdata similar way as
ieee80211_setup_sdata is implemented. The function will be used by other
interfaces later.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-04-24 14:56:10 -04:00
Eliad Peller
afa762f687 mac80211: call ieee80211_mgd_stop() on interface stop
ieee80211_mgd_teardown() is called on netdev removal, which
occurs after the vif was already removed from the low-level
driver, resulting in the following warning:

[ 4809.014734] ------------[ cut here ]------------
[ 4809.019861] WARNING: at net/mac80211/driver-ops.h:12 ieee80211_bss_info_change_notify+0x200/0x2c8 [mac80211]()
[ 4809.030388] wlan0:  Failed check-sdata-in-driver check, flags: 0x4
[ 4809.036862] Modules linked in: wlcore_sdio(-) wl12xx wlcore mac80211 cfg80211 [last unloaded: cfg80211]
[ 4809.046849] [<c001bd4c>] (unwind_backtrace+0x0/0x12c)
[ 4809.055937] [<c047cf1c>] (dump_stack+0x20/0x24)
[ 4809.065385] [<c003e334>] (warn_slowpath_common+0x5c/0x74)
[ 4809.075589] [<c003e408>] (warn_slowpath_fmt+0x40/0x48)
[ 4809.088291] [<bf033630>] (ieee80211_bss_info_change_notify+0x200/0x2c8 [mac80211])
[ 4809.102844] [<bf067f84>] (ieee80211_destroy_auth_data+0x80/0xa4 [mac80211])
[ 4809.116276] [<bf068004>] (ieee80211_mgd_teardown+0x5c/0x74 [mac80211])
[ 4809.129331] [<bf043f18>] (ieee80211_teardown_sdata+0xb0/0xd8 [mac80211])
[ 4809.141595] [<c03b5e58>] (rollback_registered_many+0x228/0x2f0)
[ 4809.153056] [<c03b5f48>] (unregister_netdevice_many+0x28/0x50)
[ 4809.165696] [<bf041ea8>] (ieee80211_remove_interfaces+0xb4/0xdc [mac80211])
[ 4809.179151] [<bf032174>] (ieee80211_unregister_hw+0x50/0xf0 [mac80211])
[ 4809.191043] [<bf0bebb4>] (wlcore_remove+0x5c/0x7c [wlcore])
[ 4809.201491] [<c02c6918>] (platform_drv_remove+0x24/0x28)
[ 4809.212029] [<c02c4d50>] (__device_release_driver+0x8c/0xcc)
[ 4809.222738] [<c02c4e84>] (device_release_driver+0x30/0x3c)
[ 4809.233099] [<c02c4258>] (bus_remove_device+0x10c/0x128)
[ 4809.242620] [<c02c26f8>] (device_del+0x11c/0x17c)
[ 4809.252150] [<c02c6de0>] (platform_device_del+0x28/0x68)
[ 4809.263051] [<bf0df49c>] (wl1271_remove+0x3c/0x50 [wlcore_sdio])
[ 4809.273590] [<c03806b0>] (sdio_bus_remove+0x48/0xf8)
[ 4809.283754] [<c02c4d50>] (__device_release_driver+0x8c/0xcc)
[ 4809.293729] [<c02c4e2c>] (driver_detach+0x9c/0xc4)
[ 4809.303163] [<c02c3d7c>] (bus_remove_driver+0xc4/0xf4)
[ 4809.312973] [<c02c5a98>] (driver_unregister+0x70/0x7c)
[ 4809.323220] [<c03809c4>] (sdio_unregister_driver+0x24/0x2c)
[ 4809.334213] [<bf0df458>] (wl1271_exit+0x14/0x1c [wlcore_sdio])
[ 4809.344930] [<c009b1a4>] (sys_delete_module+0x228/0x2a8)
[ 4809.354734] ---[ end trace 515290ccf5feb522 ]---

Rename ieee80211_mgd_teardown() to ieee80211_mgd_stop(),
and call it on ieee80211_do_stop().

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-04-24 14:42:42 -04:00
Luciano Coelho
bb3e10fb58 mac80211: check IEEE80211_HW_QUEUE_CONTROL in ieee80211_check_queues()
Commit 3a25a8c8 (mac80211: add improved HW queue control) introduced a
bug when running in AP mode without the IEEE80211_HW_QUEUE_CONTROL
flag set.  The ieee80211_check_queues() function always returns
-EINVAL, preventing AP mode from starting.  To fix this, check whether
this flag is set before checking if cab_queue is set properly.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-04-16 14:16:58 -04:00
Johannes Berg
4d6c36fa22 mac80211: clean up an ieee80211_do_open error path
Eliad's comment prompted me to look closer at
the error paths in ieee80211_do_open() and I
found one that should use the error labels.

Also add a comment about the clear_bit since
in many error cases the bit hasn't been set.

Cc: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-04-11 16:23:51 -04:00
Johannes Berg
3a25a8c8b7 mac80211: add improved HW queue control
mac80211 currently only supports one hardware queue
per AC. This is already problematic for off-channel
uses since if we go off channel while the BE queue
is full and then try to send an off-channel frame
the frame will never go out. This will become worse
when we support multi-channel since then a queue on
one channel might be full, but we have to stop the
software queue for all channels. That is obviously
not desirable.

To address this problem allow drivers to register
more hardware queues, and allow them to map them to
virtual interfaces. When they stop a hardware queue
the corresponding AC software queues on the correct
interfaces will be stopped as well. Additionally,
there's an off-channel queue to solve that problem
and a per-interface after-DTIM beacon queue. This
allows drivers to manage software queues closer to
how the hardware works.

Currently, there's a limit of 16 hardware queues.
This may or may not be sufficient, we can adjust it
as needed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-04-11 16:23:50 -04:00
Johannes Berg
4b6f1dd6a6 mac80211: add explicit monitor interface if needed
The queue mapping redesign that I'm planning to do
will break pure injection unless we handle monitor
interfaces explicitly. One possible option would
be to have the driver tell mac80211 about monitor
mode queues etc., but that would duplicate the API
since we already need to have queue assignments
handled per virtual interface.

So in order to solve this, have a virtual monitor
interface that is added whenever all active vifs
are monitors. We could also use the state of one
of the monitor interfaces, but managing that would
be complicated, so allocate separate state.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-04-11 16:23:49 -04:00
Johannes Berg
3edaf3e61f mac80211: manage AP netdev carrier state
The AP netdev is really only active when beaconing, so
manage the carrier state accordingly. Also do that for
VLAN interfaces enslaved to a given AP interface.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-04-11 16:23:48 -04:00
Johannes Berg
32c5057b22 mac80211: use IEEE80211_NUM_ACS
When comparing hw->queues to determine if the
device is QoS capable, use IEEE80211_NUM_ACS
instead of just 4.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-04-10 14:56:10 -04:00
Johannes Berg
ded81f6ba9 mac80211: decouple # of netdev queues from HW queues
When we get more hardware queues, we'll still want
to only have netdev queues per AC, so set it up in
that way. If the hardware doesn't support QoS (by
not supporting at least 4 queues) the netdevs get
a single queue only (this is no change in behavior
as there are no drivers with 2 or 3 queues today.)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-04-10 14:54:10 -04:00
Johannes Berg
3abead59fc mac80211: combine QoS with other BSS changes
When associating and particularly when disassociating
there's no need to notify the driver about changes
with multiple calls to bss_info_changed, we should
combine the QoS enabling/disabling into the same call
as otherwise the driver could get confused about QoS
suddenly getting disabled while connected.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-03-05 15:53:46 -05:00
John W. Linville
8701ff0a88 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2012-02-29 14:53:21 -05:00
Johannes Berg
54e4ffb2ab mac80211: fix auth/assoc data & timer leak
When removing an interface while it is in the
process of authenticating or associating, we
leak the auth_data or assoc_data, and leave
the timer pending. The timer then crashes the
system when it fires as its data is gone.

Fix this by explicitly deleting all the data
when the interface is removed. This uncovered
another bug -- this problem should have been
detected by the sta_info_flush() warning but
that function doesn't ever return non-zero,
I'll fix that in a separate patch.

Reported-by: Hieu Nguyen <hieux.c.nguyen@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-02-27 14:06:42 -05:00
Mohammed Shafi Shajakhan
0dee00686d mac80211: Fix a warning on changing to monitor mode from STA
nothing needs to be done for monitor/AP_VLAN mode on calling
ieee80211_bss_info_change_notify -> drv_bss_info_changed with the change
flag 'BSS_CHANGED_IDLE'. 'wl1271' seems to use BSS_CHANGED_IDLE only for
STA and IBSS mode. further the non-idle state of the monitor mode is
taken care by the 'count' variable which counts non-idle interfaces.
ieee80211_idle_off(local, "in use") will be called.
this fixes the following WARNING when we have initially STA mode
(network manager running) and not associated, and change it to monitor
mode with network manager disabled and bringing up the monitor mode.
this changes the idle state from 'true' (STA unassociated) to 'false'
(MONITOR mode)
exposed by the commit 405385f8ce
"mac80211: set bss_conf.idle when vif is connected"

	WARNING: net/mac80211/main.c:212
	ieee80211_bss_info_change_notify+0x1cf/0x330 [mac80211]()
	Hardware name: 64756D6
	Pid: 3835, comm: ifconfig Tainted: G           O
	3.3.0-rc3-wl #9
	Call Trace:
	  [<c0133b02>] warn_slowpath_common+0x72/0xa0
	  [<fc8e8c3f>] ?
	  ieee80211_bss_info_change_notify+0x1cf/0x330 [mac80211]
	  [<fc8e8c3f>] ?
	  ieee80211_bss_info_change_notify+0x1cf/0x330 [mac80211]
	  [<c0133b52>] warn_slowpath_null+0x22/0x30
	  [<fc8e8c3f>]
	  ieee80211_bss_info_change_notify+0x1cf/0x330 [mac80211]
	  [<fc8f9de3>] __ieee80211_recalc_idle+0x113/0x430
	  [mac80211]
	  [<fc8fabc6>] ieee80211_do_open+0x156/0x7e0 [mac80211]
	  [<fc8f8a25>] ?
	  ieee80211_check_concurrent_iface+0x25/0x180 [mac80211]
	  [<c015dd9f>] ? raw_notifier_call_chain+0x1f/0x30
	  [<fc8fb290>] ieee80211_open+0x40/0x80 [mac80211]
	  [<c05894f6>] __dev_open+0x96/0xe0
	  [<c068fba5>] ? _raw_spin_unlock_bh+0x35/0x40
	  [<c05881d9>] __dev_change_flags+0x109/0x170
	  [<c0589423>] dev_change_flags+0x23/0x60
	  [<c05f3770>] devinet_ioctl+0x6a0/0x770

 ieee80211 phy0: device no longer idle - in use

Cc: Eliad Peller <eliad@wizery.com>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-02-21 14:45:27 -05:00
Eliad Peller
885bd8eca6 mac80211: support hw scan while idle
Currently, mac80211 goes to idle-off before starting a scan.
However, some devices that implement hw scan might not
need going idle-off in order to perform a hw scan, and
thus saving some energy and simplifying their state machine.

(Note that this is also the case for sched scan - it
currently doesn't make mac80211 go idle-off)

Add a new flag to indicate support for hw scan while idle.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-02-06 14:55:51 -05:00
Johannes Berg
66e67e4189 mac80211: redesign auth/assoc
This is the second part of the auth/assoc redesign,
the mac80211 part. This moves the auth/assoc code
out of the work abstraction and into the MLME, so
that we don't flip channels all the time etc.

The only downside is that when we are associated,
we need to drop the association in order to create
a connection to another AP, but for most drivers
this is actually desirable and the ability to do
was never used by any applications. If we want to
implement resource reservation with FT-OTA, we'd
probably best do it with explicit R-O-C in wpa_s.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-02-06 14:50:37 -05:00
John W. Linville
874239f51f Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2012-02-01 10:48:50 -05:00
Simon Wunderlich
19468413e8 mac80211: add support for mcs masks
* Handle MCS masks set by the user.
* Match rates provided by the rate control algorithm to the mask set,
  also in HT mode, and switch back to legacy mode if necessary.
* add debugfs files to observate the rate selection

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-30 15:48:26 -05:00
Johannes Berg
83d5cc0124 mac80211: station state transition error handling
In the future, when we start notifying drivers,
state transitions could potentially fail. To make
it easier to distinguish between programming bugs
and driver failures:
 * rename sta_info_move_state() to
   sta_info_pre_move_state() which can only be
   called before the station is inserted (and
   check this with a new station flag).
 * rename sta_info_move_state_checked() to just
   plain sta_info_move_state(), as it will be
   the regular function that can fail for more
   than just one reason (bad transition or an
   error from the driver)

This makes the programming model easier -- one of
the functions can only be called before insertion
and can't fail, the other can fail.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-30 15:41:25 -05:00
Eliad Peller
405385f8ce mac80211: set bss_conf.idle when vif is connected
__ieee80211_recalc_idle() iterates through the vifs,
sets bss_conf.idle = true if they are disconnected,
and increases "count" if they are not (which later
gets evaluated in order to determine whether the
device is idle).

However, the loop doesn't set bss_conf.idle = false
(along with increasing "count"), causing the device
idle state and the vif idle state to get out of sync
in some cases.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-24 14:47:09 -05:00