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path: root/net/mac80211/scan.c
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2015-03-30mac80211: IBSS fix scan requestJanusz.Dziedzic@tieto.com
In case of wide bandwidth (wider than 20MHz) used by IBSS, scan all channels in chandef to be able to find neighboring IBSS netwqworks that use the same overall channels but a different control channel. Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-01-23mac80211: complete scan work immediately if quiesced or suspendedLuciano Coelho
It is possible that a deferred scan is queued after the queues are flushed in __ieee80211_suspend(). The deferred scan work may be scheduled by ROC or ieee80211_stop_poll(). To make sure don't start a new scan while suspending, check whether we're quiescing or suspended and complete the scan immediately if that's the case. Signed-off-by: Luciano Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-01-14mac80211: don't defer scans in case of radar detectionEliad Peller
Radar detection can last indefinite time. There is no point in deferring a scan request in this case - simply return -EBUSY. Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-01-14mac80211: remove local->radar_detect_enabledEliad Peller
local->radar_detect_enabled should tell whether radar_detect is enabled on any interface belonging to local. However, it's not getting updated correctly in many cases (actually, when testing with hwsim it's never been set, even when the dfs master is beaconing). Instead of handling all the corner cases (e.g. channel switch), simply check whether radar detection is enabled only when needed, instead of caching the result. Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-01-14mac80211: let flush() drop packets when possibleEmmanuel Grumbach
When roaming / suspending, it makes no sense to wait until the transmit queues of the device are empty. In extreme condition they can be starved (VO saturating the air), but even in regular cases, it is pointless to delay the roaming because the low level driver is trying to send packets to an AP which is far away. We'd rather drop these packets and let TCP retransmit if needed. This will allow to speed up the roaming. For suspend, the explanation is even more trivial. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: allow drivers to support NL80211_SCAN_FLAG_RANDOM_ADDRJohannes Berg
Allow drivers to support NL80211_SCAN_FLAG_RANDOM_ADDR with software based scanning and generate a random MAC address for them for every scan request with the flag. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: rcu-ify scan and scheduled scan request pointersJohannes Berg
In order to use the scan and scheduled scan request pointers during RX to check for randomisation, make them accessible using RCU. Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-19mac80211: remove redundant checkEliad Peller
local->scan_req was tested in the previous line, so it can't be NULL. Signed-off-by: Eliad Peller <eliadx.peller@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-09-05mac80211: add Intel Mobile Communications copyrightJohannes Berg
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>
2014-08-26mac80211: scan: Replace rcu_assign_pointer() with RCU_INIT_POINTER()Andreea-Cristina Bernat
The use of "rcu_assign_pointer()" is NULLing out the pointer. According to RCU_INIT_POINTER()'s block comment: "1. This use of RCU_INIT_POINTER() is NULLing out the pointer" it is better to use it instead of rcu_assign_pointer() because it has a smaller overhead. The following Coccinelle semantic patch was used: @@ @@ - rcu_assign_pointer + RCU_INIT_POINTER (..., NULL) Signed-off-by: Andreea-Cristina Bernat <bernat.ada@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-25mac80211: split sched scan IEsDavid Spinadel
Split sched scan IEs to band specific and not band specific blocks. Common IEs blocks may be sent to the FW once per command, instead of per band. This allows optimization of size of the command, which may be required by some drivers (eg. iwlmvm with newer firmware version). As this changes the mac80211 API, update all drivers to use the new version correctly, even if they don't (yet) make use of the split data. Signed-off-by: David Spinadel <david.spinadel@intel.com> Reviewed-by: Alexander Bondar <alexander.bondar@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-25mac80211: support more than one band in scan requestDavid Spinadel
Some drivers (such as iwlmvm) can handle multiple bands in a single HW scan request. Add a HW flag to indicate that the driver support this. To hold the required data, create a separate structure for HW scan request that holds cfg scan request and data about different parts of the scan IEs. As this changes the mac80211 API, update all drivers using it to use the correct new function type/argument. Signed-off-by: David Spinadel <david.spinadel@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-05-09mac80211: handle failed restart/resume betterJohannes Berg
When the driver fails during HW restart or resume, the whole stack goes into a very confused state with interfaces being up while the hardware is down etc. Address this by shutting down everything; we'll run into a lot of warnings in the process but that's better than having the whole stack get messed up. Reviewed-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09mac80211: use RCU_INIT_POINTERMonam Agarwal
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>
2014-03-19mac80211: release sched_scan_sdata when stopping sched scanAlexander Bondar
Assuming sched_scan_stop operation is synchronous the driver may not necessary call ieee80211_sched_scan_stopped_work. Since this work is the only place where sched_scan_sdata is released we can possibly run into situation when it is never released. Fix this by releasing it just after calling drv_sched_scan_stop. Signed-off-by: Alexander Bondar <alexander.bondar@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-02-20mac80211: allow driver to return error from sched_scan_stopJohannes Berg
In order to solve races with sched_scan_stop, it is necessary for the driver to be able to return an error to propagate that to cfg80211 so it doesn't send an event. Reviewed-by: Alexander Bondar <alexander.bondar@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-02-11mac80211: fix IE buffer lenDavid Spinadel
Remove size of SSID IE from the IE buffer in scan and sched scan, since this IE isn't added to this buffer. Reviewed-by: Eliad Peller <eliad@wizery.com> Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Reviewed-by: Alexander Bondar <alexander.bondar@intel.com> Signed-off-by: David Spinadel <david.spinadel@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-16mac80211: reschedule sched scan after HW restartDavid Spinadel
Keep the sched scan req when starting sched scan, and reschedule it in case of HW restart during sched scan. The upper layer don't have to know about the restart. Signed-off-by: David Spinadel <david.spinadel@intel.com> Reviewed-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-16Merge remote-tracking branch 'wireless-next/master' into mac80211-nextJohannes Berg
2013-12-06Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless Conflicts: drivers/net/wireless/brcm80211/Kconfig net/mac80211/util.c
2013-12-05mac80211: start_next_roc only if scan was actually runningEliad Peller
On scan completion we try start any pending roc. However, if scan was just pending (and not actually started) there is no point in trying to start the roc, as it might have started already. This solves the following warning: WARNING: CPU: 0 PID: 3552 at net/mac80211/offchannel.c:269 ieee80211_start_next_roc+0x164/0x204 [mac80211]() [<c001cd38>] (unwind_backtrace+0x0/0xf0) [<c00181d0>] (show_stack+0x10/0x14) [<c05c0d8c>] (dump_stack+0x78/0x94) [<c0047c08>] (warn_slowpath_common+0x68/0x8c) [<c0047c48>] (warn_slowpath_null+0x1c/0x24) [<bf4d6660>] (ieee80211_start_next_roc+0x164/0x204 [mac80211]) [<bf4d5a74>] (ieee80211_scan_cancel+0xe8/0x190 [mac80211]) [<bf4df970>] (ieee80211_do_stop+0x63c/0x79c [mac80211]) [<bf4dfae0>] (ieee80211_stop+0x10/0x18 [mac80211]) [<c0504d84>] (__dev_close_many+0x84/0xcc) [<c0504df4>] (__dev_close+0x28/0x3c) [<c0509708>] (__dev_change_flags+0x78/0x144) [<c0509854>] (dev_change_flags+0x10/0x48) [<c055fe3c>] (devinet_ioctl+0x614/0x6d0) [<c04f22a0>] (sock_ioctl+0x5c/0x2a4) [<c0124eb4>] (do_vfs_ioctl+0x7c/0x5d8) [<c012547c>] (SyS_ioctl+0x6c/0x7c) Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-05mac80211: determine completed scan type by defined opsEliad Peller
In some cases, determining the completed scan type was done by testing the SCAN_HW_SCANNING flag. However, this doesn't take care for the case in which the hw scan was requested, but hasn't started yet (e.g. due to active remain_on_channel). Replace this test by checking whether ops->hw_scan is defined. This solves the following warning: WARNING: CPU: 0 PID: 3552 at net/mac80211/offchannel.c:156 __ieee80211_scan_completed+0x1b4/0x2dc [mac80211]() [<c001cd38>] (unwind_backtrace+0x0/0xf0) [<c00181d0>] (show_stack+0x10/0x14) [<c05c0d8c>] (dump_stack+0x78/0x94) [<c0047c08>] (warn_slowpath_common+0x68/0x8c) [<c0047c48>] (warn_slowpath_null+0x1c/0x24) [<bf4d4504>] (__ieee80211_scan_completed+0x1b4/0x2dc [mac80211]) [<bf4d5a74>] (ieee80211_scan_cancel+0xe8/0x190 [mac80211]) [<bf4df970>] (ieee80211_do_stop+0x63c/0x79c [mac80211]) [<bf4dfae0>] (ieee80211_stop+0x10/0x18 [mac80211]) [<c0504d84>] (__dev_close_many+0x84/0xcc) [<c0504df4>] (__dev_close+0x28/0x3c) [<c0509708>] (__dev_change_flags+0x78/0x144) [<c0509854>] (dev_change_flags+0x10/0x48) [<c055fe3c>] (devinet_ioctl+0x614/0x6d0) [<c04f22a0>] (sock_ioctl+0x5c/0x2a4) [<c0124eb4>] (do_vfs_ioctl+0x7c/0x5d8) [<c012547c>] (SyS_ioctl+0x6c/0x7c) Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-12-03mac80211: remove duplicate codeEliad Peller
The same code appears just a few lines below. Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-11-25cfg80211: consolidate passive-scan and no-ibss flagsLuis R. Rodriguez
These two flags are used for the same purpose, just combine them into a no-ir flag to annotate no initiating radiation is allowed. Old userspace sending either flag will have it treated as the no-ir flag. To be considerate to older userspace we also send both the no-ir flag and the old no-ibss flags. Newer userspace will have to be aware of older kernels. Update all places in the tree using these flags with the following semantic patch: @@ @@ -NL80211_RRF_PASSIVE_SCAN +NL80211_RRF_NO_IR @@ @@ -NL80211_RRF_NO_IBSS +NL80211_RRF_NO_IR @@ @@ -IEEE80211_CHAN_PASSIVE_SCAN +IEEE80211_CHAN_NO_IR @@ @@ -IEEE80211_CHAN_NO_IBSS +IEEE80211_CHAN_NO_IR @@ @@ -NL80211_RRF_NO_IR | NL80211_RRF_NO_IR +NL80211_RRF_NO_IR @@ @@ -IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_IR +IEEE80211_CHAN_NO_IR @@ @@ -(NL80211_RRF_NO_IR) +NL80211_RRF_NO_IR @@ @@ -(IEEE80211_CHAN_NO_IR) +IEEE80211_CHAN_NO_IR Along with some hand-optimisations in documentation, to remove duplicates and to fix some indentation. Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com> [do all the driver updates in one go] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-11-25mac80211: fix scheduled scan rtnl deadlockJohannes Berg
When changing cfg80211 to use RTNL locking, this caused a deadlock in mac80211 as it calls cfg80211_sched_scan_stopped() from a work item that's on a workqueue that is flushed with the RTNL held. Fix this by simply using schedule_work(), the work only needs to finish running before the wiphy is unregistered, no other synchronisation (e.g. with suspend) is really required since for suspend userspace is already blocked anyway when we flush the workqueue so will only pick up the event after resume. Cc: stable@vger.kernel.org Fixes: 5fe231e87372 ("cfg80211: vastly simplify locking") Reported-and-tested-by: Eliad Peller <eliadx.peller@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-11-04Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless Conflicts: drivers/net/wireless/iwlwifi/pcie/drv.c
2013-10-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Conflicts: drivers/net/usb/qmi_wwan.c include/net/dst.h Trivial merge conflicts, both were overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-09mac80211: correctly close cancelled scansEmmanuel Grumbach
__ieee80211_scan_completed is called from a worker. This means that the following flow is possible. * driver calls ieee80211_scan_completed * mac80211 cancels the scan (that is already complete) * __ieee80211_scan_completed runs When scan_work will finally run, it will see that the scan hasn't been aborted and might even trigger another scan on another band. This leads to a situation where cfg80211's scan is not done and no further scan can be issued. Fix this by setting a new flag when a HW scan is being cancelled so that no other scan will be triggered. Cc: stable@vger.kernel.org Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-09-26mac80211: change beacon/connection pollingStanislaw Gruszka
Since when we detect beacon lost we do active AP probing (using nullfunc frame or probe request) there is no need to have beacon polling. Flags IEEE80211_STA_BEACON_POLL seems to be used just for historical reasons. Change also make that after we start connection poll due to beacon loss, next received beacon will abort the poll. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-07-16mac80211: allow scanning for 5/10 MHz channels in IBSSSimon Wunderlich
Use a chandef instead of just the channel for scanning, and enable 5/10 Mhz scanning for IBSS mode. Also reporting is changed to the new inform_bss functions. 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>
2013-07-16mac80211: select and adjust bitrates according to channel modeSimon Wunderlich
The various components accessing the bitrates table must use consider the used channel bandwidth to select only available rates or calculate the bitrate correctly. There are some rates in reduced bandwidth modes which can't be represented as multiples of 500kbps, like 2.25 MBit/s in 5 MHz mode. The standard suggests to round up to the next multiple of 500kbps, just do that in mac80211 as well. Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de> [make rate unsigned in ieee80211_add_tx_radiotap_header(), squash fix] Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
2013-06-13mac80211: track AP's beacon rate and give it to the driverAlexander Bondar
Track the AP's beacon rate in the scan BSS data and in the interface configuration to let the drivers know which rate the AP is using. This information may be used by drivers, in our case to let the firmware optimise beacon RX. Signed-off-by: Alexander Bondar <alexander.bondar@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-04-16mac80211: parse VHT channel switch IEsJohannes Berg
VHT introduces multiple IEs that need to be parsed for a wide bandwidth channel switch. Two are (currently) needed in mac80211: * wide bandwidth channel switch element * channel switch wrapper element The former is contained in the latter for beacons and probe responses, but not for the spectrum management action frames so the IE parser needs a new argument to differentiate them. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-04-08mac80211: check ERP info IE length in parserJohannes Berg
It's always just one byte, so check for that and remove the length field from the parser struct. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-25mac80211: Use a cfg80211_chan_def in ieee80211_hw_conf_chanKarl Beldan
Drivers that don't use chanctxes cannot perform VHT association because they still use a "backward compatibility" pair of {ieee80211_channel, nl80211_channel_type} in ieee80211_conf and ieee80211_local. Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com> [fix kernel-doc] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-03-18mac80211: pass queue bitmap to flush operationJohannes Berg
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>
2013-03-11mac80211: remove a few set but unused variablesJohannes Berg
Found by compiling with W=1. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-15mac80211: add radar detection command/eventSimon Wunderlich
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>
2013-02-11mac80211: Add flushes before going off-channelSeth Forshee
We've got a couple of races when enabling powersave with an AP for off-channel operation. The first is fairly simple. If we go off-channel before the nullfunc frame to enable PS is transmitted then it may not be received by the AP. Add a flush after enabling off-channel PS to prevent this from happening. The second race is a bit more subtle. If the driver supports QoS and has frames queued when the nullfunc frame is queued, those frames may get transmitted after the nullfunc frame. If PM is not set then the AP is being told that we've exited PS before we go off-channel and may try to deliver frames. To prevent this, add a flush after stopping the queues but before passing the nullfunc frame to the driver. Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-11mac80211: Fix tx queue handling during scansSeth Forshee
Scans currently work by stopping the netdev tx queues but leaving the mac80211 queues active. This stops the flow of incoming packets while still allowing mac80211 to transmit nullfunc and probe request frames to facilitate scanning. However, the driver may try to wake the mac80211 queues while in this state, which will also wake the netdev queues. To prevent this, add a new queue stop reason, IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL, to be used when stopping the tx queues for off-channel operation. This prevents the netdev queues from waking when a driver wakes the mac80211 queues. This also stops all frames from being transmitted, even those meant to be sent off-channel. Add a new tx control flag, IEEE80211_TX_CTL_OFFCHAN_TX_OK, which allows frames to be transmitted when the queues are stopped only for the off-channel stop reason. Update all locations transmitting off-channel frames to use this flag. Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-11mac80211: introduce beacon-only timing dataJohannes Berg
In order to be able to predict the next DTIM TBTT in the driver, add the ability to use timing data from beacons only with the new hardware flag IEEE80211_HW_TIMING_BEACON_ONLY and the BSS info value sync_dtim_count which is only valid if the timing data came from a beacon. The data can only come from a beacon, and if no beacon was received before association it is updated later together with the DTIM count notification. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-11cfg80211: pass wiphy to cfg80211_ref_bss/put_bssJohannes Berg
This prepares for using the spinlock instead of krefs which is needed in the next patch to track the refs of combined BSSes correctly. Acked-by: Bing Zhao <bzhao@marvell.com> [mwifiex] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-31mac80211: improve latency and throughput while software scanningStanislaw Gruszka
Patch vastly improve latency while scanning. Slight throughput improvements were observed as well. Is intended for improve performance of voice and video applications, when scan is periodically requested by user space (i.e. default NetworkManager behaviour). Patch remove latency requirement based on PM_QOS_NETWORK_LATENCY, this value is 2000 seconds by default (i.e. approximately 0.5 hour !?!). Also remove listen interval requirement, which based on beaconing and depending on BSS parameters. It can make we stay off-channel for a second or more. Instead try to offer the best latency that we could, i.e. be off-channel no longer than PASSIVE channel scan time: 125 ms. That mean we will scan two ACTIVE channels and go back to on-channel, and one PASSIVE channel, and go back to on-channel. Patch also decrease PASSIVE channel scan time to about 110 ms. As drawback patch increase overall scan time. On my tests, when scanning both 2GHz and 5GHz bands, scanning time increase from 5 seconds up to 10 seconds. Since that increase happen only when we are associated, I think it can be acceptable. If eventually better scan time is needed for situations when we lose signal and quickly need to decide to which AP roam, additional scan flag or parameter can be introduced. I tested patch by doing: while true; do iw dev wlan0 scan; sleep 3; done > /dev/null and ping -i0.2 -c 1000 HOST on remote and local machine, results are as below: * Ping from local periodically scanning machine to AP: Unpatched: rtt min/avg/max/mdev = 0.928/24.946/182.135/36.873 ms Patched: rtt min/avg/max/mdev = 0.928/19.678/150.845/33.130 ms * Ping from remote machine to periodically scanning machine: Unpatched: rtt min/avg/max/mdev = 1.637/120.683/709.139/164.337 ms Patched: rtt min/avg/max/mdev = 1.807/26.893/201.435/40.284 ms Throughput measured by scp show following results. * Upload to periodically scanning machine: Unpatched: 3.9MB/s 03:15 Patched: 4.3MB/s 02:58 * Download from periodically scanning machine: Unpatched: 5.5MB/s 02:17 Patched: 6.2MB/s 02:02 Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-31mac80211: start auth/assoc timeout on frame statusJohannes Berg
When sending authentication/association frames they might take a bit of time to go out because we may have to synchronise with the AP, in particular in the case where it's really a P2P GO. In this case the 200ms fixed timeout could potentially be too short if the beacon interval is relatively large. For drivers that report TX status we can do better. Instead of starting the timeout directly, start it only when the frame status arrives. Since then the frame was out on the air, we can wait shorter (the typical response time is supposed to be 30ms, wait 100ms.) Also, if the frame failed to be transmitted try again right away instead of waiting. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-31mac80211: remove unused mesh data from bssJohannes Berg
These pointers/values are never used, remove them. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-31mac80211: remove last_probe_resp from bssJohannes Berg
We track this, but never use it, so we can just remove it. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-28Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless Conflicts: drivers/net/wireless/ath/ath9k/main.c drivers/net/wireless/iwlwifi/dvm/tx.c
2013-01-16mac80211: synchronize scan off/on-channel and PS statesStanislaw Gruszka
Since: commit b23b025fe246f3acc2988eb6d400df34c27cb8ae Author: Ben Greear <greearb@candelatech.com> Date: Fri Feb 4 11:54:17 2011 -0800 mac80211: Optimize scans on current operating channel. we do not disable PS while going back to operational channel (on ieee80211_scan_state_suspend) and deffer that until scan finish. But since we are allowed to send frames, we can send a frame to AP without PM bit set, so disable PS on AP side. Then when we switch to off-channel (in ieee80211_scan_state_resume) we do not enable PS. Hence we are off-channel with PS disabled, frames are not buffered by AP. To fix remove offchannel_ps_disable argument and always enable PS when going off-channel and disable it when going on-channel, like it was before. Cc: stable@vger.kernel.org # 2.6.39+ Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Tested-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03mac82011: use frame control to differentiate probe resp/beaconEmmanuel Grumbach
The probe response/beacon management frame RX code passes a bool parameter to differentiate beacons and probe responses. This is useless since we have the frame and can thus use its frame control field. Moreover it is buggy since there is one call to ieee80211_rx_bss_info with a beacon frame that is indicated as a probe response, which is also fixed by using the frame control field, so do that. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03mac80211: fix dtim_period in hidden SSID AP associationJohannes Berg
When AP's SSID is hidden the BSS can appear several times in cfg80211's BSS list: once with a zero-length SSID that comes from the beacon, and once for each SSID from probe reponses. Since the mac80211 stores its data in ieee80211_bss which is embedded into cfg80211_bss, mac80211's data will be duplicated too. This becomes a problem when a driver needs the dtim_period since this data exists only in the beacon's instance in cfg80211 bss table which isn't the instance that is used when associating. Remove the DTIM period from the BSS table and track it explicitly to avoid this problem. Cc: stable@vger.kernel.org Tested-by: Efi Tubul <efi.tubul@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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