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* mac80211: use DECLARE_EWMAJohannes Berg2015-08-141-1/+1
| | | | | | | | | | Instead of using the out-of-line average calculation, use the new DECLARE_EWMA() macro to declare a signal EWMA, and use that. This actually *reduces* the code size slightly (on x86-64) while also reducing the station info size by 80 bytes. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: select an AID when creating new mesh STAsBob Copeland2015-07-171-6/+35
| | | | | | | | | | | | | | | Instead of using peer link id for AID, generate a new AID when creating mesh STAs in the kernel peering manager. This enables smaller TIM elements and more closely follows the standard, and it also enables mesh to work on drivers that require a valid AID when the STA is inserted (ath10k firmware has this requirement, for example). In the case of userspace-managed stations, we use the AID from NL80211_CMD_NEW_STATION. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: mesh: separate plid and aid conceptsBob Copeland2015-07-171-10/+19
| | | | | | | | | | | | | | According to 802.11-2012 13.3.1, a mesh STA should assign an AID upon receipt of a mesh peering open frame rather than using the link id of the peer. Using the peer link id has two potential issues: it may not be unique among the peers, and by its nature it is random, so the TIM may not compress well. In preparation for allocating it properly, use sta->sta.aid, but keep the existing behavior of using the plid in the aid we send. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: reorder mesh_plink to remove forward declBob Copeland2015-07-171-57/+52
| | | | | | | | Move mesh_plink_frame_tx() above the first caller to remove the forward declaration. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* Merge branch 'mac80211' into mac80211-nextJohannes Berg2015-07-171-1/+4
|\ | | | | | | | | | | | | This is necessary to merge the new TDLS and mesh patches, as they depend on some fixes. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| * mac80211: add missing length check for confirm framesBob Copeland2015-07-171-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | Although mesh_rx_plink_frame() already checks that frames have enough bytes for the action code plus another two bytes for capability/reason code, it doesn't take into account that confirm frames also have an additional two-byte aid. As a result, a corrupt frame could cause a subsequent subtraction to wrap around to ill effect. Add another check for this case. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| * mac80211: correct aid location in peering framesBob Copeland2015-07-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | According to 802.11-2012 8.5.16.3.2 AID comes directly after the capability bytes in mesh peering confirm frames. The existing code, however, was adding a 2 byte offset to this location, resulting in garbage data going out over the air. Remove the offset to fix it. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: move mesh related station fields to own structJohannes Berg2015-07-171-88/+89
|/ | | | | | | | There are now a fairly large number of mesh fields that really aren't needed in any other modes; move those into their own structure and allocate them separately. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: Always check rates and capabilities in mesh modeAlexis Green2015-06-091-1/+2
| | | | | | | | | | | | | In mesh mode there is a race between establishing links and processing rates and capabilities in beacons. This is very noticeable with slow beacons (e.g. beacon intervals of 1s) and manifested for us as stations using minstrel when minstrel_ht should be used. Fixed by changing mesh_sta_info_init so that it always checks rates and such if it has not already done so. Signed-off-by: Alexis Green <agreen@cococorp.com> CC: Jesse Jones <jjones@cococorp.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: remove short slot/short preamble incapable flagsJohannes Berg2015-06-021-3/+1
| | | | | | | | | | | | There are no drivers setting IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE or IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE, so any code using the two flags is dead; it's also exceedingly unlikely that any new driver could ever need to set these flags. The wcn36xx code is almost certainly broken, but this preserves the previous behaviour. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: introduce plink lock for plink fieldsBob Copeland2015-04-201-17/+20
| | | | | | | | | | | | The mesh plink code uses sta->lock to serialize access to the plink state fields between the peer link state machine and the peer link timer. Some paths (e.g. those involving mps_qos_null_tx()) unfortunately hold this spinlock across frame tx, which is soon to be disallowed. Add a new spinlock just for plink access. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: add VHT support for IBSSJanusz.Dziedzic@tieto.com2015-03-301-0/+4
| | | | | | | | | Add VHT support for IBSS. Drivers could activate this feature by setting NL80211_EXT_FEATURE_VHT_IBSS flag. Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mesh_plink: fixup type of timeout to match usageNicholas Mc Guire2015-03-041-1/+1
| | | | | | | | timeout was being passed as int but assigned from u32/u16 values and used as unsigned type. This is really only for better readability. Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mesh_plink: use msecs_to_jiffies for proper time conversionNicholas Mc Guire2015-03-041-2/+2
| | | | | | | | | | | | This is primarily an API consolidation and should make things more readable it replaces var * HZ / 1000 by msecs_to_jiffies(var) which also handles corner cases correctly. There is a change of behavior as e.g. for HZ 100, t * HZ / 1000 will return 0 for t < 10 but msecs_to_jiffies will return at least 1 always. Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* Revert "mac80211: keep sending peer candidate events while in listen state"Bob Copeland2015-01-231-7/+0
| | | | | | | | | | | | | | | | | This reverts commit 2ae70efcea7a695a62bb47170d3fb16674b8dbea. The new peer events that are generated by the change are causing problems with wpa_supplicant in userspace: wpa_s tries to restart SAE authentication with the peer when receiving the event, even though authentication may be in progress already, and it gets very confused. Revert back to the original operating mode, which is to only get events when there is no corresponding station entry. Cc: Nishikawa, Kenzoh <Kenzoh.Nishikawa@jp.sony.com> Cc: Masashi Honma <masashi.honma@gmail.com> Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: keep sending peer candidate events while in listen stateNishikawa, Kenzoh2014-12-171-0/+7
| | | | | | | | | | | | | | | | | | | Instead of sending peer candidate events just once, send them as long as the peer remains in the LISTEN state in the peering state machine, when userspace is implementing the peering manager. Userspace may silence the events from a peer by progressing the state machine or by setting the link state to BLOCKED. Fixes the problem that a mesh peering process won't be fired again after the previous first peering trial fails due to like air propagation error if the peering is managed by user space such as wpa_supplicant. This patch works with another patch for wpa_supplicant described here which fires a peering process again triggered by the notice from kernel. http://lists.shmoo.com/pipermail/hostap/2014-November/031235.html Signed-off-by: Kenzoh Nishikawa <Kenzoh.Nishikawa@jp.sony.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* Merge branch 'master' of ↵John W. Linville2014-09-081-1/+6
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
| * mac80211: mesh_plink: handle confirm frames with new plidBob Copeland2014-08-261-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 802.11 standard says when processing a plink confirm frame: "If the peerLinkID in the mesh peering instance has not been set, the Local Link ID field of the Mesh Peering Confirm request shall be copied into the peerLinkID in the mesh peering instance." We were only doing this when receiving an open peering frame, but it could happen that the open frame gets lost and so we should handle this case rather than rejecting the confirm and failing the whole peering process. Reported-by: Yu Niiro <yu.niiro@gmail.com> Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: mesh_plink: use get_unaligned_le16 instead of memcpyBob Copeland2014-08-261-7/+3
| | | | | | | | | | | | | | Use get_unaligned_le16 to access llid/plid. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: don't duplicate station QoS capability dataJohannes Berg2014-08-151-3/+1
|/ | | | | | | | | | | | | We currently track the QoS capability twice: for all peer stations in the WLAN_STA_WME flag, and for any clients associated to an AP interface separately for drivers in the sta->sta.wme field. Remove the WLAN_STA_WME flag and track the capability only in the driver-visible field, getting rid of the limitation that the field is only valid in AP mode. Reviewed-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: remove ignore_plink_timer flagBob Copeland2014-06-231-7/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The mesh_plink code is doing some interesting things with the ignore_plink_timer flag. It seems the original intent was to handle this race: cpu 0 cpu 1 ----- ----- start timer handler for state X acquire sta_lock change state from X to Y mod_timer() / del_timer() release sta_lock acquire sta_lock execute state Y timer too soon However, using the mod_timer()/del_timer() return values to detect these cases is broken. As a result, timers get ignored unnecessarily, and stations can get stuck in the peering state machine. Instead, we can detect the case by looking at the timer expiration. In the case of del_timer, just ignore the timers in the following (LISTEN/ESTAB) states since they won't have timers anyway. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: enable WME for peer mesh STAChun-Yeow Yeoh2014-01-061-0/+1
| | | | | | | | Enable the WME for peer mesh STA so that the driver, such as wcn36xx, will pick this up and enabling it in HW. Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: use put_unaligned_le16 in mesh_plink_frame_txChun-Yeow Yeoh2013-11-251-27/+27
| | | | | | | Use put_unaligned_le16 in mesh_plink_frame_tx. Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: clean up mesh local link ID generationThomas Pedersen2013-11-251-5/+35
| | | | | | | | | | | | | | | | | | 802.11-2012 13.3.1 implicitly limits the mesh local link ID range to that of AID, since for mesh PS the local link ID must be indicated in the TIM IE, which only holds IEEE80211_MAX_AID bits. Also the code was allowing a local link ID of 0, but this is not correct since that TIM bit is used for indicating buffered mcast frames. Generate a random, unique, link ID from 1 - 2007, and drop a modulo conversion for the local link ID, but keep it for the peer link ID in case he chose something > MAX_AID. Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: factor out plink event gatheringThomas Pedersen2013-11-251-80/+115
| | | | | Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: factor out peering FSMThomas Pedersen2013-11-251-143/+155
| | | | | | Signed-off-by: Thomas Pedersen <thomas@cozybit.com> [fix some indentation, squash llid assignment] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: assign sta plid earlyThomas Pedersen2013-11-251-2/+1
| | | | | | | | | If we store the peer link ID right after initializing a new neighbor, there is no need to do it later in the peering FSM. Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: consolidate rcu unlocks in plink frame rxThomas Pedersen2013-11-251-18/+10
| | | | | Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: factor peering frame processing into own functionThomas Pedersen2013-11-251-40/+48
| | | | | Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: return -ENOMEM in mesh_plink_frame_txBob Copeland2013-11-251-1/+1
| | | | | | | All other paths return an error code, do the same here. Signed-off-by: Bob Copeland <bob@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: mesh_plink: don't ignore holding timerBob Copeland2013-11-251-2/+1
| | | | | | | | | | | | | | | | The ignore_plink_timer flag is set when doing mod_timer() if the timer was not previously active. This is to avoid executing the timeout if del_timer() was subsequently called. However, del_timer() only happens if we are moving to ESTAB state or get a close frame while in HOLDING. We cannot leave HOLDING and re-enter ESTAB unless we receive a close frame (in which case ignore_plink_timer is already set) or if the timeout expires, so there actually isn't a case where this is needed on mod_timer(). Signed-off-by: Bob Copeland <bob@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: mesh_plink: collapse the two switch statements togetherBob Copeland2013-11-251-17/+9
| | | | | | | | The matches_local check can just be done when looking at the individual action types. Signed-off-by: Bob Copeland <bob@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: mesh: rewrite rssi_threshold_check in CBob Copeland2013-11-251-8/+12
| | | | | | | | Use C instead of cpp for type checking. Also swap the arguments into the usual sdata -> sta order. Signed-off-by: Bob Copeland <bob@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: mesh_plink: group basic fitness checksBob Copeland2013-11-251-33/+37
| | | | | | | | | The initial frame checks differ depending on whether this is a new peer or not, but they were all intermixed with sta checks as necessary. Group them together so the two cases are clearer. Signed-off-by: Bob Copeland <bob@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: mesh: factor out common plink close/estab codeBob Copeland2013-11-251-55/+43
| | | | | | | | | | Reject and accepted close events always put the host in the holding state and compute a reason code based only on the current state. Likewise on establish we always do the same setup. Put these in functions to save some duplicated code. Signed-off-by: Bob Copeland <bob@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: hold sta->lock across plink switch statementsBob Copeland2013-11-251-26/+3
| | | | | | | | Rather than unlock at the end of each case, do it once after all is said and done. Signed-off-by: Bob Copeland <bob@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: consolidate calls to plink_frame_txThomas Pedersen2013-11-251-43/+29
| | | | | | | | | | | | Do all frame transfers in one place at the end of the big switch statements. sta->plid and sta->reason can be passed in any case, since they are only used for the frames that need them. Remove assignments to locals for values already stored in the sta structure. Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: fix off-by-one in llid check.Bob Copeland2013-11-251-1/+1
| | | | | | | | | | According to IEEE 802.11-2012 (8.4.2.104), no peering management element exists with length 7. This code is checking to see if llid is present to ignore close frames with different llid, which would be IEs with length 8. Signed-off-by: Bob Copeland <bob@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: fixes for mesh powersave logicMarco Porsch2013-10-281-1/+2
| | | | | | | | | | | | | | | | | | | | This patch fixes errors in the mesh powersave logic which cause that remote peers do not get peer power mode change notifications and mesh peer service periods (MPSPs) got stuck. When closing a peer link, set the (now invalid) peer-specific power mode to 'unknown'. Avoid overhead when local power mode is unchanged. Reliably clear MPSP flags on peering status update. Avoid MPSP flags getting stuck by not requesting a further MPSP ownership if we already are an MPSP owner. Signed-off-by: Marco Porsch <marco@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: select and adjust bitrates according to channel modeSimon Wunderlich2013-07-161-1/+1
| | | | | | | | | | | | | | | | 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>
* mac80211: fix various components for the new 5 and 10 MHz widthsSimon Wunderlich2013-06-181-1/+7
| | | | | | | | | | | | This is a collection of minor fixes: * don't allow HT IEs in IBSS for 5/10 MHz * don't allow HT IEs in Mesh for 5/10 MHz * don't downgrade from/to 5 and 10 MHz channels * don't try HT rates for 5 and 10 MHz channels when selecting rates 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>
* mac80211: fix mesh deadlockThomas Pedersen2013-06-111-6/+1
| | | | | | | | | | | | | | | | The patch "cfg80211/mac80211: use cfg80211 wdev mutex in mac80211" introduced several deadlocks by converting the ifmsh->mtx to wdev->mtx. Solve these by: 1. drop the cancel_work_sync() in ieee80211_stop_mesh(). Instead make the mesh work conditional on whether the mesh is running or not. 2. lock the mesh work with sdata_lock() to protect beacon updates and prevent races with wdev->mesh_id_len or cfg80211. Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* cfg80211/mac80211: use cfg80211 wdev mutex in mac80211Johannes Berg2013-05-251-1/+6
| | | | | | | | | | | | | | | Using separate locks in cfg80211 and mac80211 has always caused issues, for example having to unlock in places in mac80211 to call cfg80211, which even needed a framework to make cfg80211 calls after some functions returned etc. Additionally, I suspect some issues people have reported with the cfg80211 state getting confused could be due to such issues, when cfg80211 is asking mac80211 to change state but mac80211 is in the process of telling cfg80211 that the state changed (in another way.) Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: parse VHT channel switch IEsJohannes Berg2013-04-161-1/+1
| | | | | | | | | | | | | | 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>
* mac80211: stringify another plink stateThomas Pedersen2013-04-101-2/+2
| | | | | | | | The patch "mac80211: stringify mesh peering events" missed an opportunity to print the peering state as a string. Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: init mesh timer for user authed STAsThomas Pedersen2013-03-061-1/+0
| | | | | | | | | | | | | There is a corner case which wasn't being covered: userspace may authenticate and allocate stations, but still leave the peering up to the kernel. Initialize the peering timer if the MPM is not in userspace, in a path which is taken by both the kernel and userspace when allocating stations. Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: support userspace MPMThomas Pedersen2013-03-061-2/+7
| | | | | | | | | Earlier mac80211 would check whether some kind of mesh security was enabled, when the real question was "is the MPM in userspace"? Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: cleanup suspend/resume on mesh modeStanislaw Gruszka2013-03-061-26/+1
| | | | | | | Remove not used any longer suspend/resume code. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: stringify mesh peering eventsThomas Pedersen2013-02-181-14/+24
| | | | | | | | | | | Convert mesh peering events into strings and make the debug output a little easier to read. Also stop printing the llid and plid since these don't change across peering states and are random numbers anyway so they just amount to noise. Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: clean up mesh HT operationThomas Pedersen2013-02-181-38/+24
| | | | | | | | | | | | | | ieee80211_ht_cap_ie_to_sta_ht_cap() will clean up the ht_supported flag and station bandwidth field for us if the peer beacon doesn't have an HT capability element (is operating as non-HT). Also, we don't really need a special station ch_width member to track the station operating mode any more so use sta.bandwidth instead. Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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