Граф коммитов

129 Коммитов

Автор SHA1 Сообщение Дата
David S. Miller 16c54ac903 First round of fixes - details in the commits:
* use a valid hrtimer clock ID in mac80211_hwsim
  * don't reorder frames prior to BA session
  * flush a delayed work at suspend so the state is all valid before
    suspend/resume
  * fix packet statistics in fast-RX, the RX packets
    counter increment was simply missing
  * don't try to re-transmit filtered frames in an aggregation session
  * shorten (for tracing) a debug message
  * typo fix in another debug message
  * fix nul-termination with HWSIM_ATTR_RADIO_NAME in hwsim
  * fix mgmt RX processing when station is looked up by driver/device
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEExu3sM/nZ1eRSfR9Ha3t4Rpy0AB0FAli1HCYACgkQa3t4Rpy0
 AB1Sfw/+MeYZtAqeem6JzNW7OPPHgJIXHAnDyby79jzDiYZ1GF2c2asWMwBMshuH
 dTYFs15gdkfItrUF9SsvGFLRaRlPJO899lgL54EwcALxqP82Byylm36X29HTUyzB
 MS3lzrr84Ad5F/BkHa949ogcoJwmkmhSYpG5L5EclJs98Vu8pyd/AlBJ+fbNFmHz
 Pe2lDiIjt5H5MvGCZfl5PK1l9GwDLIMhLekn03HEfCN5lNz2c8aru1dhcCXxWSPG
 Oxj2J4n0WknwntKLx5F/Wceee8YDRyUBw0peKYxp8VQPPLVzpoc9GKlaCDBemwVQ
 sfVfgkkZchKtAt1SPJS5yKMfUlEQdqE3w3XIzzRS9bN3AsVK5EKL63zDO7HJ+5nZ
 2hB8kY4fjGUx0RrZKKL0jruSl+AUP5bWJUIt2VM55FM195rXUkDSjsn3M1ZIwiHp
 8fvwLWibKoQg7Y0UIdVQSl03Gfd2dEs0XrvD+fNMI9aNy/EriJZ15pxbNAPSi10Z
 pN02zFCmqxju6w1tppxW9eBoxdbt45lr1cyXY+GN6RTgm2ILM9i+tQHoNf4KuWYl
 5dydXhDkRGpUghevR4K29vBYtoaNK0CteY2xECdRGUVFnMl4QUgHInOeKcSneHCi
 Cvp31WYTAP+U/8ni0VYENqEC0iRbUNrMu2mkECxriHt5go+n5jA=
 =wths
 -----END PGP SIGNATURE-----

Merge tag 'mac80211-for-davem-2017-02-28' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
First round of fixes - details in the commits:
 * use a valid hrtimer clock ID in mac80211_hwsim
 * don't reorder frames prior to BA session
 * flush a delayed work at suspend so the state is all valid before
   suspend/resume
 * fix packet statistics in fast-RX, the RX packets
   counter increment was simply missing
 * don't try to re-transmit filtered frames in an aggregation session
 * shorten (for tracing) a debug message
 * typo fix in another debug message
 * fix nul-termination with HWSIM_ATTR_RADIO_NAME in hwsim
 * fix mgmt RX processing when station is looked up by driver/device
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-01 15:08:34 -08:00
Linus Torvalds cf393195c3 Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax
Pull IDR rewrite from Matthew Wilcox:
 "The most significant part of the following is the patch to rewrite the
  IDR & IDA to be clients of the radix tree. But there's much more,
  including an enhancement of the IDA to be significantly more space
  efficient, an IDR & IDA test suite, some improvements to the IDR API
  (and driver changes to take advantage of those improvements), several
  improvements to the radix tree test suite and RCU annotations.

  The IDR & IDA rewrite had a good spin in linux-next and Andrew's tree
  for most of the last cycle. Coupled with the IDR test suite, I feel
  pretty confident that any remaining bugs are quite hard to hit. 0-day
  did a great job of watching my git tree and pointing out problems; as
  it hit them, I added new test-cases to be sure not to be caught the
  same way twice"

Willy goes on to expand a bit on the IDR rewrite rationale:
 "The radix tree and the IDR use very similar data structures.

  Merging the two codebases lets us share the memory allocation pools,
  and results in a net deletion of 500 lines of code. It also opens up
  the possibility of exposing more of the features of the radix tree to
  users of the IDR (and I have some interesting patches along those
  lines waiting for 4.12)

  It also shrinks the size of the 'struct idr' from 40 bytes to 24 which
  will shrink a fair few data structures that embed an IDR"

* 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax: (32 commits)
  radix tree test suite: Add config option for map shift
  idr: Add missing __rcu annotations
  radix-tree: Fix __rcu annotations
  radix-tree: Add rcu_dereference and rcu_assign_pointer calls
  radix tree test suite: Run iteration tests for longer
  radix tree test suite: Fix split/join memory leaks
  radix tree test suite: Fix leaks in regression2.c
  radix tree test suite: Fix leaky tests
  radix tree test suite: Enable address sanitizer
  radix_tree_iter_resume: Fix out of bounds error
  radix-tree: Store a pointer to the root in each node
  radix-tree: Chain preallocated nodes through ->parent
  radix tree test suite: Dial down verbosity with -v
  radix tree test suite: Introduce kmalloc_verbose
  idr: Return the deleted entry from idr_remove
  radix tree test suite: Build separate binaries for some tests
  ida: Use exceptional entries for small IDAs
  ida: Move ida_bitmap to a percpu variable
  Reimplement IDR and IDA using the radix tree
  radix-tree: Add radix_tree_iter_delete
  ...
2017-02-28 20:29:41 -08:00
Felix Fietkau 890030d3c4 mac80211: don't handle filtered frames within a BA session
When running a BA session, the driver (or the hardware) already takes
care of retransmitting failed frames, since it has to keep the receiver
reorder window in sync.

Adding another layer of retransmit around that does not improve
anything. In fact, it can only lead to some strong reordering with huge
latency.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-02-27 14:06:00 +01:00
Matthew Wilcox d3e709e63e idr: Return the deleted entry from idr_remove
It is a relatively common idiom (8 instances) to first look up an IDR
entry, and then remove it from the tree if it is found, possibly doing
further operations upon the entry afterwards.  If we change idr_remove()
to return the removed object, all of these users can save themselves a
walk of the IDR tree.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
2017-02-13 21:44:03 -05:00
Amadeusz Sławiński 731977e97b mac80211: use helper function to access ieee802_1d_to_ac[]
cleanup patch to make use of ieee80211_ac_from_tid() to retrieve ac from
ieee802_1d_to_ac[]

Signed-off-by: Amadeusz Sławiński <amadeusz.slawinski@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-01-26 09:50:44 +01:00
Johannes Berg 2cc6f5a715 mac80211: set wifi_acked[_valid] bits for transmitted SKBs
There may be situations in which the in-kernel originator of an
SKB cares about its wifi transmission status. To have that, set
the wifi_acked[_valid] bits before freeing/orphaning the SKB if
the destructor is set. The originator can then use it in there.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-01-12 10:15:19 +01:00
Kirtika Ruchandani 872684b1f7 mac80211: Remove unused 'rates_idx' variable
Commit f027c2aca0 introduced 'rates_idx' in
ieee80211_tx_status_noskb but did not use it. Compiling with W=1
gives the following warning, fix it.

mac80211/status.c: In function ‘ieee80211_tx_status_noskb’:
mac80211/status.c:636:6: warning: variable ‘rates_idx’ set but not used [-Wunused-but-set-variable]

This is a harmless warning, and is only being fixed to reduce the
noise generated with W=1.

Fixes: f027c2aca0 ("mac80211: add ieee80211_tx_status_noskb")
Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Kirtika Ruchandani <kirtika@google.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-12-13 16:04:58 +01:00
Herbert Xu 83e7e4ce9e mac80211: Use rhltable instead of rhashtable
mac80211 currently uses rhashtable with insecure_elasticity set
to true.  The latter is because of duplicate objects.  What's
more, mac80211 walks the rhashtable chains by hand which is broken
as rhashtable may contain multiple tables due to resizing or
rehashing.

This patch fixes it by converting it to the newly added rhltable
interface which is designed for use with duplicate objects.

With rhltable a lookup returns a list of objects instead of a
single one.  This is then fed into the existing for_each_sta_info
macro.

This patch also deletes the sta_addr_hash function since rhashtable
defaults to jhash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-20 04:43:36 -04:00
Rajkumar Manoharan e8a24cd4b8 mac80211: allow driver to handle packet-loss mechanism
Based on consecutive msdu failures, mac80211 triggers CQM packet-loss
mechanism. Drivers like ath10k that have its own connection monitoring
algorithm, offloaded to firmware for triggering station kickout. In case
of station kickout, driver will report low ack status by mac80211 API
(ieee80211_report_low_ack).

This flag will enable the driver to completely rely on firmware events
for station kickout and bypass mac80211 packet loss mechanism.

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-09-15 16:46:20 +02:00
Aviya Erenfeld d82121845d mac80211: refactor monitor representation in sdata
Insert the u32 monitor flags variable in a new structure
that represents a monitor interface.
This will allow to add more configuration variables to
that structure which will happen in an upcoming change.

Signed-off-by: Aviya Erenfeld <aviya.erenfeld@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-09-12 11:24:47 +02:00
Masashi Honma 71f2c3470f mac80211: End the MPSP even if EOSP frame was not acked
If QoS frame with EOSP (end of service period) subfield=1 sent by local
peer was not acked by remote peer, local peer did not end the MPSP. This
prevents local peer from going to DOZE state. And if the remote peer
goes away without closing connection, local peer continues AWAKE state
and wastes battery.

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>
Acked-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-08-05 14:06:29 +02:00
Johannes Berg b8da6b6a99 mac80211: add separate last_ack variable
Instead of touching the rx_stats.last_rx from the status path, introduce
and use a status_stats.last_ack variable. This will make rx_stats.last_rx
indicate when the last frame was received, making it available for real
"last_rx" and statistics gathering; statistics, when done per-CPU, will
need to figure out which place was updated last for those items where the
"last" value is exposed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-04-06 13:18:16 +02:00
Zhang Shengju d57a544d71 mac80211: use reset to set header pointer
Since offset is zero, it's not necessary to use set function. Reset
function is straightforward, and will remove the unnecessary add
operation in set function.

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-04 22:45:13 -05:00
Helmut Schaa da629cf111 mac80211: Don't buffer non-bufferable MMPDUs
Non-bufferable MMPDUs are sent out to STAs even while in PS mode
(for example probe responses). Applying filtered frame handling for
these doesn't seem to make much sense and will only create more
air utilization when the STA wakes up. Hence, apply filtered frame
handling only for bufferable MMPDUs.

Discovered while testing an old VOIP phone that started probing
for APs while in PS mode. The mac80211/ath9k AP where the STA is
associated would reply with a probe response but the phone sometimes
moved to a new channel already and couldn't ack the probe response
anymore. In that case mac80211 applied filtered frame handling
for the un-acked probe response.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-01-14 11:10:21 +01:00
David S. Miller e9829b9745 Here's another set of patches for the current cycle:
* I merged net-next back to avoid a conflict with the
  * cfg80211 scheduled scan API extensions
  * preparations for better scan result timestamping
  * regulatory cleanups
  * mac80211 statistics cleanups
  * a few other small cleanups and fixes
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABCAAGBQJWJ6lbAAoJEDBSmw7B7bqraasP/Ryaa7zL10E+dOQtqBQHQeMe
 olbrCUtTYltr4nnuESzh5WPeIVZBQ0DIduoLLF0IDSPVwE/NrbpFUVIMHvJvr+s7
 rE9k8RB4P7BMTjf+mkDX1Od9kCKGkt4ezcyt/oNIsqM12SN9JQ99itwz6Mp94xCs
 XKsiXJRh9f/8Qwd/74qQq1Va3UfGAVuKO8WpUe/A7TYTla8ZY20pv1D8kQKQzrFg
 DwsMirjmHcUpobSjnPAAmZevRxdk6o0E+P7DYG172H2Tm8/EIMR/gYMnQeYW6HkA
 lfMMDfAGmNvyRm8v1iuBLodREP4kn4VbhMSZDtH7D6FYfmJh5fSeG09bSe51G5Xh
 zv/B8A1cCbWFqtQHp3wI6ml8VDyAhDc2Hvqb75KRn6FplIkEiszVP0y3cNHWiJVt
 Ix6Sysoa6kQDXEgR50APeLJ3VI+/mhXmvIila4jP9PKhO14SDHrCoRQO62Z0COJ7
 2E5Ir2KE8T+O9mSeuB7m8xD/t60HDd3q3tLZmH0Ps6xfxKf9y2hdZacbX4Hi5Mqk
 2XxXZYnhAXUqZmZhmG3ajnEiB4UGMt21R7dIqNTaQ9chOGBkHqIZxPm82XtNb13h
 yHILavGpUDT0z6OB2z8fxUcj4a4SrrK+aiIGh4iFpDR0Nu0IyZ5cPHXY2FfvJWmD
 ZO74RMEpBodYR8BsV4yP
 =uZ5N
 -----END PGP SIGNATURE-----

Merge tag 'mac80211-next-for-davem-2015-10-21' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

Johannes Berg says:

====================
Here's another set of patches for the current cycle:
 * I merged net-next back to avoid a conflict with the
 * cfg80211 scheduled scan API extensions
 * preparations for better scan result timestamping
 * regulatory cleanups
 * mac80211 statistics cleanups
 * a few other small cleanups and fixes
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-22 07:28:41 -07:00
Johannes Berg e5a9f8d046 mac80211: move station statistics into sub-structs
Group station statistics by where they're (mostly) updated
(TX, RX and TX-status) and group them into sub-structs of
the struct sta_info.

Also rename the variables since the grouping now makes it
obvious where they belong.

This makes it easier to identify where the statistics are
updated in the code, and thus easier to think about them.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-10-21 10:08:22 +02:00
Johannes Berg 763aa27a29 mac80211: remove sta->last_ack_signal
This file only feeds a debugfs file that isn't very useful, so remove
it. If necessary, we can add other ways to get this information, for
example in the NL80211_CMD_PROBE_CLIENT response.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-10-21 10:08:21 +02:00
David S. Miller 26440c835f Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/usb/asix_common.c
	net/ipv4/inet_connection_sock.c
	net/switchdev/switchdev.c

In the inet_connection_sock.c case the request socket hashing scheme
is completely different in net-next.

The other two conflicts were overlapping changes.

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-20 06:08:27 -07:00
Felix Fietkau f7418bc10d mac80211: fix handling of PS filtering with fast-xmit
Fixes dropped packets in the tx path in case a non-PS station triggers
the tx filter.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-09-24 16:28:01 +02:00
Helmut Schaa 4dc792b8f0 mac80211: Split sending tx'ed frames to monitor interfaces into its own function
This allows ieee80211_tx_monitor to be used directly for sending 802.11 frames
to all monitor interfaces.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-09-22 15:21:28 +02:00
Dan Carpenter 75dbf00b44 mac80211: remove always true condition
The outside if statement checks that IEEE80211_TX_INTFL_MLME_CONN_TX is
set so this condition is always true.  Checking twice upsets the static
checkers.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-08-13 11:36:01 +02:00
Johannes Berg 30686bf7f5 mac80211: convert HW flags to unsigned long bitmap
As we're running out of hardware capability flags pretty quickly,
convert them to use the regular test_bit() style unsigned long
bitmaps.

This introduces a number of helper functions/macros to set and to
test the bits, along with new debugfs code.

The occurrences of an explicit __clear_bit() are intentional, the
drivers were never supposed to change their supported bits on the
fly. We should investigate changing this to be a per-frame flag.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-06-10 16:05:36 +02:00
Johannes Berg 3b79af973c mac80211: stop using pointers as userspace cookies
Even if the pointers are really only accessible to root and used
pretty much only by wpa_supplicant, this is still not great; even
for debugging it'd be easier to have something that's easier to
read and guaranteed to never get reused.

With the recent change to make mac80211 create an ack_skb for the
mgmt-tx path this becomes possible, only the client probe method
needs to also allocate an ack_skb, and we can store the cookie in
that skb.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-06-02 13:07:59 +02:00
Johannes Berg b2eb0ee6d0 mac80211: copy nl80211 mgmt TX SKB for status
When we return the TX status for an nl80211 mgmt TX SKB, we
should also return the original frame with the status to
allow userspace to match up the submission (it could also
use the cookie but both ways are permissible.)

As TX SKBs could be encrypted, at least in the case of ANQP
while associated with the AP, copy the original SKB, store
it with an ACK frame ID and restructure the status path to
use that to return status with the original SKB. Otherwise,
userspace (in particular wpa_supplicant) will get confused.

Reported-by: Matti Gottlieb <matti.gottlieb@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-06-02 13:07:55 +02:00
Johannes Berg c206ca6709 mac80211: move dot11 counters under MAC80211_DEBUG_COUNTERS
Since these counters can only be read through debugfs, there's
very little point in maintaining them all the time. However,
even just making them depend on debugfs is pointless - they're
not normally used. Additionally a number of them aren't even
concurrency safe.

Move them under MAC80211_DEBUG_COUNTERS so they're normally
not even compiled in.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-05-05 14:21:54 +02:00
Johannes Berg 7bedd0cfad mac80211: use rhashtable for station table
We currently have a hand-rolled table with 256 entries and are
using the last byte of the MAC address as the hash. This hash
is obviously very fast, but collisions are easily created and
we waste a lot of space in the common case of just connecting
as a client to an AP where we just have a single station. The
other common case of an AP is also suboptimal due to the size
of the hash table and the ease of causing collisions.

Convert all of this to use rhashtable with jhash, which gives
us the advantage of a far better hash function (with random
perturbation to avoid hash collision attacks) and of course
that the hash table grows and shrinks dynamically with chain
length, improving both cases above.

Use a specialised hash function (using jhash, but with fixed
length) to achieve better compiler optimisation as suggested
by Sergey Ryazanov.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-04-01 10:06:26 +02:00
Johannes Berg abfbc3af57 mac80211: remove TX latency measurement code
Revert commit ad38bfc916 ("mac80211: Tx frame latency statistics")
(along with some follow-up fixes).

This code turned out not to be as useful in the current form as we
thought, and we've internally hacked it up more, but that's not
very suitable for upstream (for now), and we might just do that
with tracing instead.

Therefore, for now at least, remove this code. We might also need
to use the skb->tstamp field for the TCP performance issue, which
is more important than the debugging.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-02-28 21:31:11 +01:00
Johannes Berg 5e06a9e8b6 mac80211: remove doubled semicolon
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-01-16 13:27:56 +01:00
Johannes Berg 79c892b850 mac80211: provide per-TID RX/TX MSDU counters
Implement the new counters cfg80211 can now advertise to userspace.
The TX code is in the sequence number handler, which is a bit odd,
but that place already knows the TID and frame type, so it was
easiest and least impact there.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-01-08 15:28:20 +01:00
Eliad Peller 85b89af07d mac80211: fix dot11MulticastTransmittedFrameCount tested address
dot11MulticastTransmittedFrameCount should be updated according
to the DA, which might be different from A1. Checking A1 results
in the counter being 0 in case of station, as to-DS data frames
use A1 for the BSSID.

This behaviour is defined in state machines, specifically in the
sta_tx_dcf_3.1d(10) description of 802.11-2012.

Signed-off-by: Eliad Peller <eliad@wizery.com>
[rewrite commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-12-23 10:16:43 +01:00
Sujith Manoharan 5cf16616e1 mac80211: Fix accounting of multicast frames
Since multicast frames are marked as no-ack, using
IEEE80211_TX_STAT_ACK to check if they have been
successfully transmitted by the driver is incorrect
since a driver can choose to ignore transmission status
for no-ack frames. This results in incorrect accounting
for such frames.

To fix this issue, this patch introduces a new flag
that can be used by drivers to indicate error-free
transmission of no-ack frames.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
[add a note about not setting the flag for non-no-ack frames]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-12-12 13:48:43 +01:00
Felix Fietkau f027c2aca0 mac80211: add ieee80211_tx_status_noskb
This can be used by drivers that cannot reliably map tx status
information onto specific skbs.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 15:01:51 +01:00
Felix Fietkau 7e1cdcbb09 mac0211: add a helper function for fixing up tx status rates
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 15:01:50 +01:00
Felix Fietkau ad9dda6383 mac80211: pass tx info to ieee80211_lost_packet instead of an skb
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 15:01:50 +01:00
Liad Kaufman 1277b4a9f5 mac80211: retransmit TDLS teardown packet through AP if not ACKed
Since the TDLS peer station might not receive the teardown
packet (e.g., when in PS), this makes sure the packet is
retransmitted - this time through the AP - if the TDLS peer
didn't ACK the packet.

Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19 18:44:29 +01:00
Johannes Berg 02219b3abc mac80211: add WMM admission control support
Use the currently existing APIs between mac80211 and the low
level driver to implement WMM admission control.

The low level driver needs to report the media time used by
each transmitted packet in ieee80211_tx_status. Based on that
information, mac80211 will modify the QoS parameters of the
admission controlled Access Category when the limit is
reached. Once the original QoS parameters can be restored,
mac80211 will do so.

One issue with this approach is that management frames will
also erroneously be downgraded, but the upside is that the
implementation is simple. In the future, it can be extended
to driver- or device-based implementations that are better.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-10-22 10:42:09 +02:00
Liad Kaufman 9d58f25b12 mac80211: add TDLS connection timeout
Adding a timeout for tearing down a TDLS connection that
hasn't had ACKed traffic sent through it for a certain
amount of time.

Since we have no other monitoring facility to indicate the
existance (or non-existance) of a peer, this patch will
cause a peer to be considered as unavailable if for some X
time at least some Y packets have all not been ACKed.

Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-09-11 12:18:47 +02:00
Johannes Berg d98ad83ee8 mac80211: add Intel Mobile Communications copyright
Our legal structure changed at some point (see wikipedia), but
we forgot to immediately switch over to the new copyright
notice.

For files that we have modified in the time since the change,
add the proper copyright notice now.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-09-05 13:52:06 +02:00
Thomas Gleixner 8d7b70fb7b net: Mac80211: Remove silly timespec dance
Converting time from one format to another seems to give coders a warm
and fuzzy feeling.

Use the proper interfaces.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: John W. Linville <linville@tuxdriver.com>
[fix compile error]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23 14:22:21 +02:00
John W. Linville 737be10d8c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next 2014-05-29 12:55:38 -04:00
Felix Fietkau abd43a6a68 mac80211: reduce packet loss notifications under load
During strong signal fluctuations under high throughput, few consecutive
failed A-MPDU transmissions can easily trigger packet loss notification,
and thus (in AP mode) client disconnection.

Reduce the number of false positives by checking the A-MPDU status flag
and treating a failed A-MPDU as a single packet.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-05-28 16:22:48 +02:00
Bob Copeland 311ab8e1c2 mac80211: fixup radiotap tx flags for RTS/CTS
When using RTS/CTS, the CTS-to-Self bit in radiotap TX flags is
getting set instead of the RTS bit.  Set the correct one.

Reported-by: Larry Maxwell <larrymaxwell@agilemesh.com>
Signed-off-by: Bob Copeland <bob@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-22 17:08:30 +02:00
Chun-Yeow Yeoh 00a9a6d1e2 mac80211: update last_tx_rate only for data frame
Rate controller in firmware may also return the Tx Rate
used for management frame that is usually sent as lowest
Tx Rate (1Mbps in 2.4GHz). So update the last_tx_rate only
if it is data frame.

This patch is tested with ath9k_htc.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:50:45 +02:00
Johannes Berg 953467d321 mac80211: remove set but unused variables
Compiling with W=1 found a few variables that are set
but not used (-Wunused-but-set-variable), remove them.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-02-04 21:58:14 +01:00
Matti Gottlieb ad38bfc916 mac80211: Tx frame latency statistics
Measure TX latency and jitter statistics per station per TID.
These Measurements are disabled by default and can be enabled
via debugfs.

Features included for each station's TID:

1. Keep count of the maximum and average latency of Tx frames.
2. Keep track of many frames arrived in a specific time range
   (need to enable through debugfs and configure the bins ranges)

Signed-off-by: Matti Gottlieb <matti.gottlieb@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-02 11:51:50 +01:00
John W. Linville 353c78152c Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Conflicts:
	net/wireless/reg.c
2013-11-05 15:49:02 -05:00
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
Felix Fietkau 0c5b93290b mac80211: update sta->last_rx on acked tx frames
When clients are idle for too long, hostapd sends nullfunc frames for
probing. When those are acked by the client, the idle time needs to be
updated.

To make this work (and to avoid unnecessary probing), update sta->last_rx
whenever an ACK was received for a tx packet. Only do this if the flag
IEEE80211_HW_REPORTS_TX_ACK_STATUS is set.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-09-30 12:34:09 +02:00
Karl Beldan a824131017 mac80211: report some VHT radiotap infos for tx status
The radiotap VHT info is 12 bytes (required to be aligned on 2) :
u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_*
u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_*
u8 bandwidth
u8 mcs_nss[4]
u8 coding
u8 group_id
u16 partial_aid

ATM mac80211 can handle IEEE80211_RADIOTAP_VHT_KNOWN_{GI,BANDWIDTH} and
mcs_nss[0] (i.e single user) in simple cases.
This is more a placeholder to let sniffers give more clues for VHT,
since we don't have yet the proper infrastructure/conventions
in mac80211 for complete feedback (e.g consider dynamic BW).

Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-08-01 10:49:04 +02:00
Fabio Baltieri e47f2509e5 mac80211: use oneshot blink API for LED triggers
Change mac80211 LED trigger code to use the generic
led_trigger_blink_oneshot() API for transmit and receive activity
indication.

This gives a better feedback to the user, as with the new API each
activity event results in a visible blink, while a constant traffic
results in a continuous blink at constant rate.

Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
[fix LED disabled build error]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-08-01 10:48:49 +02:00