Commit Graph

2909 Commits

Author SHA1 Message Date
Felix Fietkau c3e7724b6b mac80211: use ieee80211_free_txskb to fix possible skb leaks
A few places free skbs using dev_kfree_skb even though they're called
after ieee80211_subif_start_xmit might have cloned it for tracking tx
status. Use ieee80211_free_txskb here to prevent skb leaks.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@vger.kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-10-08 15:06:05 -04:00
Thomas Pedersen 55fabefe36 mac80211: call drv_get_tsf() in sleepable context
The call to drv_get/set_tsf() was put on the workqueue to perform tsf
adjustments since that function might sleep. However it ended up inside
a spinlock, whose critical section must be atomic. Do tsf adjustment
outside the spinlock instead, and get rid of a warning.

Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-10-08 15:06:02 -04:00
Johannes Berg c6f219dc83 mac80211: don't send delBA on addBA failure
There's no reason to send a delBA when the
peer refused our addBA, so change that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-21 16:14:14 +02:00
Johannes Berg 582bb505b6 mac80211: don't send delBA when removing stations
When a station is removed and we stop the aggregation
sessions, it's not useful to send delBA since this is
due to us or the station disassociating or dropping
the connection in some other way, so change that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-21 16:14:14 +02:00
Johannes Berg 7f1611469b mac80211: don't send delBA before disassoc
When we disassociate, it's not really useful to
send delBA action frames since we're going to send
disassoc/deauth anyway, so change that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-21 16:14:13 +02:00
Sylvain Roger Rieunier 2514ec8653 mac80211: fix IBSS auth TX debug message
In the IBSS auth TX debug message the BSSID and DA
address are reversed, fix that.

Signed-off-by: Sylvain Roger Rieunier <sylvain.roger.rieunier@gmail.com>
[reword commit message and make it fit 72 cols]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-20 10:31:34 +02:00
Johannes Berg 552bff0c2f cfg80211: constify name parameter to add_virtual_intf
The name can't be modified by the driver,
make it const.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-19 09:32:59 +02:00
Johannes Berg 2ad4814fb6 mac80211: make reset debugfs depend on CONFIG_PM
The suspend/resume code depends on CONFIG_PM, so
the reset debugfs file can only be made available
if that is enabled.

Fengguang Wu's zero-day build testing found this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-19 08:20:24 +02:00
Chun-Yeow Yeoh 9385d04f28 mac80211: allow re-open the blocked peer link in mesh
Peer link which is blocked using the "iw mesh0 station
set <MAC addr> plink_action block" is previously not able
to re-open using "iw mesh0 station set <MAC addr>
plink_action open". This patch is intended to solve this.

If the station plink state remains at OPN_SNT once open,
try block and open again should solve this problem.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-14 14:25:16 +02:00
Johannes Berg 5d8e4237d2 mac80211: change locking around ieee80211_recalc_smps
Make the function acquire the necessary mutex itself
to simplify the callers.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-14 14:09:25 +02:00
Johannes Berg 04b7b2ff50 mac80211: handle power constraint/country IE better
Currently, mac80211 uses the power constraint IE, and reduces
the regulatory max TX power by it. This can cause issues if
the AP is advertising a large power constraint value matching
a high TX power in its country IE, for example in this case:

...
Country: US  Environment: Indoor/Outdoor
    ...
    Channels [157 - 157] @ 30 dBm
    ...
Power constraint: 13 dB
...

What happened here is that our local regulatory TX power is
15 dBm, and gets reduced by 13 dB so we end up with only
2 dBm effective TX power, which is way too low.

Instead, handle the country IE/power constraint IE combined
and restrict our TX power to the max of the regulatory power
and the maximum power advertised by the AP, in this case
17 dBm (= 30 dBm - 13 dB).

Also print a message when this happens to let the user know
and help us debug issues with it.

Reported-by: Carl A. Cook <CACook@quantum-equities.com>
Tested-by: Carl A. Cook <CACook@quantum-equities.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-14 14:06:51 +02:00
Johannes Berg 3a6a0d8ee8 mac80211: remove unneeded CONFIG_PM ifdef
The functions are only called if CONFIG_PM is set
as the callers are under an ifdef, so there's no
need to also define no-op functions.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-11 14:43:43 +02:00
Felix Fietkau 1bad538243 mac80211: validate skb->dev in the tx status path
skb->dev might contain a stale reference to a device that was already
deleted, and using it unchecked can lead to invalid pointer accesses.
Since this is only used for nl80211 tx, iterate over active interfaces
to find a match for skb->dev, and discard the tx status if the device
is gone.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-10 18:44:58 +02:00
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
Johannes Berg e548c49e6d mac80211: add key flag for management keys
Mark keys that might be used to receive management
frames so drivers can fall back on software crypto
for them if they don't support hardware offload.
As the new flag is only set correctly for RX keys
and the existing IEEE80211_KEY_FLAG_SW_MGMT flag
can only affect TX, also rename the latter to
IEEE80211_KEY_FLAG_SW_MGMT_TX.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-10 11:29:17 +02:00
Antonio Quartulli 2cc59e784b mac80211: reply to AUTH with DEAUTH if sta allocation fails in IBSS
Whenever a host gets an AUTH frame it first allocates a new
station and then replies with another AUTH frame. However,
if sta allocations fails the host should send a DEAUTH frame
instead to tell the other end that something went wrong.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
[reword commit message a bit]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-07 13:50:47 +02:00
Antonio Quartulli 6ae16775d6 mac80211: move ieee80211_send_deauth_disassoc outside mlme code
Move ieee80211_send_deauth_disassoc() to util.c to make it
available for the rest of the mac80211 code.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
[reword commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-07 13:50:34 +02:00
Peter Senna Tschudin 316b6b5df7 net/mac80211/scan.c: removes unnecessary semicolon
removes unnecessary semicolon

Found by Coccinelle: http://coccinelle.lip6.fr/

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-07 13:30:06 +02:00
Michal Kazior 23a85b45cf mac80211: refactor set_channel_type
Split functionality for further reuse.

Will prevent code duplication when channel context
channel_type merging is introduced.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-06 17:55:00 +02:00
Eliad Peller 964b19f977 mac80211: use synchronize_net() on key destroying
__ieee80211_key_destroy() calls synchronize_rcu() in
order to sync the tx path before destroying the key.

However, synching the tx path can be done with
synchronize_net() as well, which is usually faster
(the timing might be important for roaming scenarios).

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-06 17:29:23 +02:00
Johannes Berg 761a48d260 mac80211: check power constraint IE size when parsing
The power constraint IE is always a single byte
so check the size when parsing instead of later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-06 17:11:00 +02:00
Johannes Berg 00b14825ee Merge remote-tracking branch 'wireless-next/master' into mac80211-next 2012-09-06 17:05:28 +02:00
Johannes Berg 882a7c69d3 mac80211: disconnect if channel switch fails
Disconnect from the AP if channel switching in the
driver failed or if the new channel is unavailable.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-06 17:05:24 +02:00
Johannes Berg 30dd3edf97 mac80211: don't hang on to sched_scan_ies
There's no need to keep a copy of the scheduled
scan IEs after the driver has been told, if it
requires a copy it must make one. Therefore, we
can move sched_scan_ies into the function.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-06 15:56:35 +02:00
Johannes Berg 944b9e375d Merge remote-tracking branch 'mac80211/master' into mac80211-next
Pull in mac80211.git to let the next patch apply
without conflicts, also resolving a hwsim conflict.

Conflicts:
	drivers/net/wireless/mac80211_hwsim.c

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-06 15:56:02 +02:00
Wei Yongjun a4ed53466a mac80211: use list_move instead of list_del/list_add
Using list_move() instead of list_del() + list_add().

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-06 11:55:47 +02:00
LEO Airwarosu Yoichi Shinoda 7ce8c7a343 mac80211: Various small fixes for cfg.c: mpath_set_pinfo()
Various small fixes for net/mac80211/cfg.c:mpath_set_pinfo():
Initialize *pinfo before filling members in, handle MESH_PATH_RESOLVED
correctly, and remove bogus assignment; result in correct display
of FLAGS values and meaningful EXPTIME for expired paths in iw utility.

Signed-off-by: Yoichi Shinoda <shinoda@jaist.ac.jp>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-05 16:06:05 +02:00
Johannes Berg 00ea6deb0c mac80211: don't use kerneldoc for ieee80211_add_rx_radiotap_header
Doing so creates warnings, but the function is internal and
not part of the 802.11 docbooks, so it from kerneldoc.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-05 15:55:27 +02:00
Eliad Peller 3d2abdfdf1 mac80211: clear bssid on auth/assoc failure
ifmgd->bssid wasn't cleared properly in some
auth/assoc failure cases, causing mac80211 and
the low-level driver to go out of sync.

Clear ifmgd->bssid on failure, and notify the driver.

Cc: stable@kernel.org # 3.4+
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-04 17:14:19 +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
John W. Linville a4881cc45a Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next 2012-08-23 09:49:42 -04:00
Sujith Manoharan aba4e6fff8 mac80211: Fix AP mode regression
Commit mac80211: avoid using synchronize_rcu in ieee80211_set_probe_resp
changed the return value when the probe response template is not present.
Revert to the earlier value of 1 - this fixes AP mode for drivers like
ath9k.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-22 10:55:04 +02:00
Thomas Pedersen 27f011243a mac80211: fix DS to MBSS address translation
The destination address of unicast frames forwarded through a mesh gate
was being replaced with the broadcast address. Instead leave the
original destination address as the mesh DA. If the nexthop address is
not in the mpath table it will be resolved. If that fails, the frame
will be forwarded to known mesh gates.

Reported-by: Cedric Voncken <cedric.voncken@acksys.fr>
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-22 09:45:05 +02:00
John W. Linville 01e17dacd4 Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Conflicts:
	drivers/net/wireless/mac80211_hwsim.c
2012-08-21 16:00:21 -04:00
Johannes Berg dcf33963c4 mac80211: clean up ieee80211_subif_start_xmit
There's no need to carry around a return value
that is always NETDEV_TX_OK anyway.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 14:13:46 +02:00
Johannes Berg fe94fe05e9 mac80211: pass channel to ieee80211_send_probe_req
In multi-channel scenarios, the channel that we will
transmit a probe request on isn't always the current
channel (which will be NULL anyway) but will instead
be the channel that the AP is on. Pass the channel
to the ieee80211_send_probe_req() function so it can
be used in the different scenarios. The scan code
continues to pass the current channel, of course.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 14:13:45 +02:00
Johannes Berg c0af07340a mac80211: convert ops checks to WARN_ON
There's no need to BUG_ON when a driver registers
invalid operations, warn and return an error.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 14:13:44 +02:00
Johannes Berg 9b86487043 mac80211: check operating channel in scan
The optimisation of scanning only on the current
channel should check the operating channel. Also
modify it to compare channel pointer rather than
the frequency.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 14:13:43 +02:00
Johannes Berg 4797c7ba93 mac80211: use RX status band instead of current band
Even for single-channel devices it is possible that we
switch the channel temporarily (e.g. for scanning) but
while doing so process a received frame that was still
received on the old channel, so checking the current
band is racy. Use the band from status instead.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 14:13:43 +02:00
Johannes Berg 3d01be72e6 mac80211: don't assume channel is set in tracing
With the move to multi-channel and away from
drv_config(), hw.conf.channel will not always
be set, only for devices using the current API
instead of the new channel context APIs. Check
the channel is set before adding its frequency
to the trace data.

Also break some overly long lines in the code.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 14:13:42 +02:00
Johannes Berg f9e6e95b63 mac80211: use oper_channel in rate init
Using hw.conf.channel is wrong as it could be the
temporary channel if the station is added from the
workqueue while the device is already on another
channel. Use oper_channel instead.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 14:13:41 +02:00
Johannes Berg 9e99a127b5 mac80211: remove freq/chantype from debugfs
You can now get these values through iw, and
they conflict with multi-channel work.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 14:13:40 +02:00
Johannes Berg e31583cdf0 mac80211: remove almost unused local variable
In ieee80211_beacon_get_tim() we can use the
txrc.sband instead of a separate local variable.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 14:13:39 +02:00
Johannes Berg 466f310d10 mac80211: mesh: don't use global channel type
Using local->_oper_channel_type in the mesh code is
completely wrong as this value is the combination
of the various interface channel types and can be
a different value from the mesh interface in case
there are multiple virtual interfaces.

Use sdata->vif.bss_conf.channel_type instead as it
tracks the per-vif channel type.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 14:13:38 +02:00
Johannes Berg d348f69f59 mac80211: simplify buffers in aes_128_cmac_vector
There's no need to use a single scratch buffer and
calculate offsets into it, just use two separate
buffers for the separate variables.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 14:03:18 +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
Johannes Berg cc74c0c7d6 mac80211: make ieee80211_beacon_connection_loss_work static
There's no need to declare the function in the
header file since it's only used in a single
place, so make it static.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 13:57:50 +02:00
Johannes Berg 5bc1420b11 mac80211: check size of channel switch IE when parsing
The channel switch IE has a fixed size, so we can
discard it in parsing if it's not the right size
and use the right struct pointer.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20 13:57:50 +02:00