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path: root/net/mac80211/sta_info.c
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2023-06-21wifi: mac80211: avoid lockdep checking when removing deflinkBenjamin Berg
struct sta_info may be removed without holding sta_mtx if it has not yet been inserted. To support this, only assert that the lock is held for links other than the deflink. This fixes lockdep issues that may be triggered in error cases. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230619161906.cdd81377dea0.If5a6734b4b85608a2275a09b4f99b5564d82997f@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-06wifi: mac80211: batch recalc during STA flushJohannes Berg
When we flush stations, we first take them off the list and then destroy them one by one. If we do the different mode recalculations while destroying them, we cause the following scenario: - STA 1 has 80 MHz - min chanctx width is now 80 MHz - STA 2 has 80 MHz - empty STA list - destroy STA 2 - recalc min chanctx width -> results in 20 MHz as the STA list is already empty This is broken, since as far as the driver is concerned STA 1 still exists at this point, and this causes issues at least with iwlwifi. Fix - and also optimize - this by doing the recalc of min chanctx width (and also P2P PS) only after all the stations were removed. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230604120651.48d262b6b42d.Ia15532657c17535c28ec0c5df263b65f0f80663c@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-06wifi: mac80211: move sta_info_move_state() upJohannes Berg
To fix a sequencing issue, this code needs to be changed a bit. Move it up in the file to prepare for that. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230604120651.05bb735d7075.I984b5c194a0f84580247d73620a4e61a5f82a774@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-06-06wifi: mac80211: recalc min chandef for new STA linksJohannes Berg
When adding a new link to a station, this needs to cause a recalculation of the minimum chandef since otherwise we can have a higher bandwidth station connected on that link than the link is operating at. Do the appropriate recalc. Fixes: cb71f1d136a6 ("wifi: mac80211: add sta link addition/removal") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Gregory Greenman <gregory.greenman@intel.com> Link: https://lore.kernel.org/r/20230604120651.377adf3c789a.I91bf28f399e16e6ac1f83bacd1029a698b4e6685@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-04-13wifi: mac80211: add flush_sta methodJohannes Berg
Some drivers like iwlwifi might have per-STA queues, so we may want to flush/drop just those queues rather than all when removing a station. Add a separate method for that. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-04-13wifi: mac80211: flush queues on STA removalJohannes Berg
When we remove a station, we first make it unreachable, then we (must) remove its keys, and then remove the station itself. Depending on the hardware design, if we have hardware crypto at all, frames still sitting on hardware queues may then be transmitted without a valid key, possibly unencrypted or with a fixed key. Fix this by flushing the queues when removing stations so this cannot happen. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-03-30wifi: mac80211: fix invalid drv_sta_pre_rcu_remove calls for non-uploaded staFelix Fietkau
Avoid potential data corruption issues caused by uninitialized driver private data structures. Reported-by: Brian Coverstone <brian@mainsequence.net> Fixes: 6a9d1b91f34d ("mac80211: add pre-RCU-sync sta removal driver operation") Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20230324120924.38412-3-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14wifi: mac80211: add a workaround for receiving non-standard mesh A-MSDUFelix Fietkau
At least ath10k and ath11k supported hardware (maybe more) does not implement mesh A-MSDU aggregation in a standard compliant way. 802.11-2020 9.3.2.2.2 declares that the Mesh Control field is part of the A-MSDU header (and little-endian). As such, its length must not be included in the subframe length field. Hardware affected by this bug treats the mesh control field as part of the MSDU data and sets the length accordingly. In order to avoid packet loss, keep track of which stations are affected by this and take it into account when converting A-MSDU to 802.3 + mesh control packets. Signed-off-by: Felix Fietkau <nbd@nbd.name> Link: https://lore.kernel.org/r/20230213100855.34315-5-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-02-14wifi: mac80211: make rate u32 in sta_set_rate_info_rx()Shayne Chen
The value of last_rate in ieee80211_sta_rx_stats is degraded from u32 to u16 after being assigned to rate variable, which causes information loss in STA_STATS_FIELD_TYPE and later bitfields. Signed-off-by: Shayne Chen <shayne.chen@mediatek.com> Link: https://lore.kernel.org/r/20230209110659.25447-1-shayne.chen@mediatek.com Fixes: 41cbb0f5a295 ("mac80211: add support for HE") Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2023-01-18mac80211: support minimal EHT rate reporting on RXJohannes Berg
Add minimal support for RX EHT rate reporting, not yet adding (modifying) any radiotap headers, just statistics for cfg80211. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-10-28net: Remove the obsolte u64_stats_fetch_*_irq() users (net).Thomas Gleixner
Now that the 32bit UP oddity is gone and 32bit uses always a sequence count, there is no need for the fetch_irq() variants anymore. Convert to the regular interface. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-10-10wifi: mac80211: Drop support for TX push pathAlexander Wetzel
All drivers are now using mac80211 internal queues (iTXQs). Drop mac80211 internal support for the old push path. Signed-off-by: Alexander Wetzel <alexander@wetzel-home.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-10-07wifi: mac80211: recalc station aggregate data during link switchJohannes Berg
During link switching, the active links change, so we need to recalculate the aggregate data in the stations. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-10-07wifi: mac80211: add API to show the link STAs in debugfsBenjamin Berg
Create debugfs data per-link. For drivers, there is a new operation link_sta_add_debugfs which will always be called. For non-MLO, the station directory will be used directly rather than creating a corresponding subdirectory. As such, non-MLO drivers can simply continue to create the data from sta_debugfs_add. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> [add missing inlines if !CONFIG_MAC80211_DEBUGFS] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-10-07wifi: mac80211: add pointer from link STA to STABenjamin Berg
While often not needed, this considerably simplifies going from a link to the STA. This helps in cases such as debugfs where a single pointer should allow accessing a specific link and the STA. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-09-06wifi: mac80211: keep A-MSDU data in sta and per-linkBenjamin Berg
The A-MSDU data needs to be stored per-link and aggregated into a single value for the station. Add a new struct ieee_80211_sta_aggregates in order to store this data and a new function ieee80211_sta_recalc_aggregates to update the current data for the STA. Note that in the non MLO case the pointer in ieee80211_sta will directly reference the data in deflink.agg, which means that recalculation may be skipped in that case. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-09-06wifi: mac80211: add vif/sta link RCU dereference macrosJohannes Berg
Add macros (and an exported function) to allow checking some link RCU protected accesses that are happening in callbacks from mac80211 and are thus under the correct lock. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-09-06wifi: mac80211: add ieee80211_find_sta_by_link_addrs APIJohannes Berg
Add a new API function ieee80211_find_sta_by_link_addrs() that looks up the STA and link ID based on interface and station link addresses. We're going to use it for mac80211-hwsim to track on the AP side which links are active. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-09-06wifi: mac80211: make smps_mode per-linkBenjamin Berg
The SMPS power save mode needs to be per-link rather than being shared for all links. As such, move it into struct ieee80211_link_sta. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-09-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
tools/testing/selftests/net/.gitignore sort the net-next version and use it Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-08-29net: Use u64_stats_fetch_begin_irq() for stats fetch.Sebastian Andrzej Siewior
On 32bit-UP u64_stats_fetch_begin() disables only preemption. If the reader is in preemptible context and the writer side (u64_stats_update_begin*()) runs in an interrupt context (IRQ or softirq) then the writer can update the stats during the read operation. This update remains undetected. Use u64_stats_fetch_begin_irq() to ensure the stats fetch on 32bit-UP are not interrupted by a writer. 32bit-SMP remains unaffected by this change. Cc: "David S. Miller" <davem@davemloft.net> Cc: Catherine Sullivan <csully@google.com> Cc: David Awogbemila <awogbemila@google.com> Cc: Dimitris Michailidis <dmichail@fungible.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Hans Ulli Kroll <ulli.kroll@googlemail.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Jeroen de Borst <jeroendb@google.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Simon Horman <simon.horman@corigine.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Cc: oss-drivers@corigine.com Cc: stable@vger.kernel.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-08-25wifi: mac80211: clean up a needless assignment in ieee80211_sta_activate_link()Lukas Bulwahn
Commit 177577dbd223 ("wifi: mac80211: sta_info: fix link_sta insertion") makes ieee80211_sta_activate_link() return 0 in the 'hash' label case. Hence, setting ret in the !test_sta_flag(...) branch to zero is not needed anymore and can be dropped. Remove a needless assignment. No functional change. No change in object code. Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Link: https://lore.kernel.org/r/20220812103126.25308-1-lukas.bulwahn@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-08-25wifi: mac80211: maintain link_id in link_staJohannes Berg
To helper drivers if they e.g. have a lookup of the link_sta pointer, add the link ID to the link_sta structure. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-08-25wifi: mac80211: properly set old_links when removing a linkShaul Triebitz
In ieee80211_sta_remove_link, valid_links is set to the new_links before calling drv_change_sta_links, but is used for the old_links. Fixes: cb71f1d136a6 ("wifi: mac80211: add sta link addition/removal") Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-08-25wifi: mac80211: always free sta in __sta_info_alloc in case of errorLorenzo Bianconi
Free sta pointer in __sta_info_alloc routine if sta_info_alloc_link() fails. Fixes: 246b39e4a1ba5 ("wifi: mac80211: refactor some sta_info link handling") Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Link: https://lore.kernel.org/r/a3d079208684cddbc25289f7f7e0fed795b0cad4.1661260857.git.lorenzo@kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-22wifi: mac80211: sta_info: fix link_sta insertionJohannes Berg
When inserting a link STA, make sure it doesn't exist first and add lockdep assertions that we cannot modify the hash table without holding the sta_mtx, so this check is really correct. Also return without hashing if the driver failed, and warn if the hashing fails, which shouldn't happen due to the check described above. Fixes: cb71f1d136a6 ("wifi: mac80211: add sta link addition/removal") Fixes: ba6ddab94fc6 ("wifi: mac80211: maintain link-sta hash table") Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-22wifi: mac80211: fix link sta hash table handlingJohannes Berg
There are two issues here: we unhash the link stations only directly before freeing the station they belong to, and we also don't unhash all the links correctly in all cases. Fix these issues. Fixes: ba6ddab94fc6 ("wifi: mac80211: maintain link-sta hash table") Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15wifi: mac80211: fix up link station creation/insertionJohannes Berg
When we create a station with a non-default link, then we should have a link address, and we definitely need to insert it into the link hash table on insertion. Split the API into with and without link creation and if it has a link, insert the link into the link hash table on sta_info_insert(). Fixes: ba6ddab94fc6 ("wifi: mac80211: maintain link-sta hash table") Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15wifi: mac80211: limit A-MSDU subframes for client tooJohannes Berg
In AP/mesh where the stations are added by userspace, we limit the number of A-MSDU subframes according to the extended capabilities. Refactor the code and extend that also to client-side. Fixes: 506bcfa8abeb ("mac80211: limit the A-MSDU Tx based on peer's capabilities") Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15wifi: mac80211: Support multi link in ieee80211_recalc_min_chandef()Andrei Otcheretianski
Recalculate min channel context for the given or all interface links, depending on the caller. For a station state change, we need to recalculate all of them since we don't know which link (or multiple) it might be on. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15wifi: mac80211: skip rate statistics for MLD STAsJohannes Berg
For now, skip rate statistics here to avoid warnings in the called code, we'll need to adjust this to have all the statistics for link stations. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15wifi: mac80211: RCU-ify link/link_conf pointersJohannes Berg
Since links can be added and removed dynamically, we need to somehow protect the sdata->link[] and vif->link_conf[] array pointers from disappearing when accessing them without locks. RCU-ify the pointers to achieve this, which requires quite a bit of rework. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15wifi: mac80211: implement callbacks for <add/mod/del>_link_stationShaul Triebitz
Implement callbacks for cfg80211 add_link_station, mod_link_station, and del_link_station API. Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-15wifi: mac80211: Remove AP SMPS leftoversAndrei Otcheretianski
AP SMPS was removed and not needed anymore. Remove the leftovers. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-01wifi: mac80211: only accumulate airtime deficit for active clientsFelix Fietkau
When a client does not generate any local tx activity, accumulating airtime deficit for the round-robin scheduler can be harmful. If this goes on for too long, the deficit could grow quite large, which might cause unreasonable initial latency once the client becomes active Signed-off-by: Felix Fietkau <nbd@nbd.name> Acked-by: Toke Høiland-Jørgensen <toke@toke.dk> Link: https://lore.kernel.org/r/20220625212411.36675-7-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-01wifi: mac80211: add a per-PHY AQL limit to improve fairnessFelix Fietkau
In order to maintain fairness, the amount of queueing needs to be limited beyond the simple per-station AQL budget, otherwise the driver can simply repeatedly do scheduling rounds until all queues that have not used their AQL budget become eligble. To be conservative, use the high AQL limit for the first txq and add half of the low AQL for each subsequent queue. Signed-off-by: Felix Fietkau <nbd@nbd.name> Acked-by: Toke Høiland-Jørgensen <toke@toke.dk> Link: https://lore.kernel.org/r/20220625212411.36675-5-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-07-01wifi: mac80211: switch airtime fairness back to deficit round-robin schedulingFelix Fietkau
This reverts commits 6a789ba679d652587532cec2a0e0274fda172f3b and 2433647bc8d983a543e7d31b41ca2de1c7e2c198. The virtual time scheduler code has a number of issues: - queues slowed down by hardware/firmware powersave handling were not properly handled. - on ath10k in push-pull mode, tx queues that the driver tries to pull from were starved, causing excessive latency - delay between tx enqueue and reported airtime use were causing excessively bursty tx behavior The bursty behavior may also be present on the round-robin scheduler, but there it is much easier to fix without introducing additional regressions Signed-off-by: Felix Fietkau <nbd@nbd.name> Acked-by: Toke Høiland-Jørgensen <toke@toke.dk> Link: https://lore.kernel.org/r/20220625212411.36675-1-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20wifi: mac80211: set STA deflink addressesJohannes Berg
We should set the STA deflink addresses in case no link is really added. Fixes: 046d2e7c50e3 ("mac80211: prepare sta handling for MLO support") Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20wifi: mac80211: maintain link-sta hash tableJohannes Berg
Maintain a hash table of link-sta addresses so we can find them for management frames etc. where addresses haven't been replaced by the drivers to the MLD address yet. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20wifi: mac80211: RCU-ify link STA pointersJohannes Berg
We need to be able to access these in a race-free way under traffic while adding/removing them, so RCU-ify the pointers. This requires passing a link_sta to a lot of functions so we don't have to do the RCU handling everywhere. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20wifi: mac80211: add sta link addition/removalJohannes Berg
Add the necessary infrastructure, including a new driver method, to add/remove links to/from a station. To do this, refactor the link alloc/free a bit, splitting that so we can do it without linking them, to handle failures better. Note that a station entry must be created representing an MLD or a non-MLD STA, it cannot change between the two. When representing an MLD, the 'deflink' is used for the first link, which might be removed later, in which case the memory isn't reused. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20wifi: mac80211: refactor some sta_info link handlingJohannes Berg
Refactor the code a bit to initialize a link belonging to a station, and (later) free all allocated links. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20wifi: mac80211: remove sta_info_tx_streams()Johannes Berg
The function is unused since commit 52b4810bed83 ("mac80211: Remove support for changing AP SMPS mode") so we can just remove it. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20wifi: mac80211: split bss_info_changed methodJohannes Berg
Split the bss_info_changed method to vif_cfg_changed and link_info_changed, with the latter getting a link ID. Also change the 'changed' parameter to u64 already, we know we need that. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20wifi: mac80211: reorg some iface data structs for MLDJohannes Berg
Start reorganizing interface related data structures toward MLD. The most complex part here is for the keys, since we have to split the various kinds of GTKs off to the link but still need to use (for WEP) the other keys as a fallback even for multicast frames. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-06-20wifi: mac80211: move some future per-link data to bss_confJohannes Berg
To add MLD, reuse the bss_conf structure later for per-link information, so move some things into it that are per link. Most transformations were done with the following spatch: @@ expression sdata; identifier var = { chanctx_conf, mu_mimo_owner, csa_active, color_change_active, color_change_color }; @@ -sdata->vif.var +sdata->vif.bss_conf.var @@ struct ieee80211_vif *vif; identifier var = { chanctx_conf, mu_mimo_owner, csa_active, color_change_active, color_change_color }; @@ -vif->var +vif->bss_conf.var Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-04-11mac80211: prepare sta handling for MLO supportSriram R
Currently in mac80211 each STA object is represented using sta_info datastructure with the associated STA specific information and drivers access ieee80211_sta part of it. With MLO (Multi Link Operation) support being added in 802.11be standard, though the association is logically with a single Multi Link capable STA, at the physical level communication can happen via different advertised links (uniquely identified by Channel, operating class, BSSID) and hence the need to handle multiple link STA parameters within a composite sta_info object called the MLD STA. The different link STA part of MLD STA are identified using the link address which can be same or different as the MLD STA address and unique link id based on the link vif. To support extension of such a model, the sta_info datastructure is modified to hold multiple link STA objects with link specific params currently within sta_info moved to this new structure. Similarly this is done for ieee80211_sta as well which will be accessed within mac80211 as well as by drivers, hence trivial driver changes are expected to support this. For current non MLO supported drivers, only one link STA is present and link information is accessed via 'deflink' member. For MLO drivers, we still need to define the APIs etc. to get the correct link ID and access the correct part of the station info. Currently in mac80211, all link STA info are accessed directly via deflink. These will be updated to access via link pointers indexed by link id with MLO support patches, with link id being 0 for non MLO supported cases. Except for couple of macro related changes, below spatch takes care of updating mac80211 and driver code to access to the link STA info via deflink. @ieee80211_sta@ struct ieee80211_sta *s; struct sta_info *si; identifier var = {supp_rates, ht_cap, vht_cap, he_cap, he_6ghz_capa, eht_cap, rx_nss, bandwidth, txpwr}; @@ ( s-> - var + deflink.var | si->sta. - var + deflink.var ) @sta_info@ struct sta_info *si; identifier var = {gtk, pcpu_rx_stats, rx_stats, rx_stats_avg, status_stats, tx_stats, cur_max_bandwidth}; @@ ( si-> - var + deflink.var ) Signed-off-by: Sriram R <quic_srirrama@quicinc.com> Link: https://lore.kernel.org/r/1649086883-13246-1-git-send-email-quic_srirrama@quicinc.com [remove MLO-drivers notes from commit message, not clear yet; run spatch] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2022-02-04mac80211: remove useless ieee80211_vif_is_mesh() checkBaligh Gasmi
We check ieee80211_vif_is_mesh() at the top if() block, there's no need to check for it again. Signed-off-by: Baligh Gasmi <gasmibal@gmail.com> Link: https://lore.kernel.org/r/20220203153035.198697-1-gasmibal@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2021-12-14mac80211: update channel context before station stateMordechay Goodstein
Currently channel context is updated only after station got an update about new assoc state, this results in station using the old channel context. Fix this by moving the update channel context before updating station, enabling the driver to immediately use the updated channel context in the new assoc state. Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20211129152938.1c80c17ffd8a.I94ae31378b363c1182cfdca46c4b7e7165cff984@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2021-11-26mac80211: fix a memory leak where sta_info is not freedAhmed Zaki
The following is from a system that went OOM due to a memory leak: wlan0: Allocated STA 74:83:c2:64:0b:87 wlan0: Allocated STA 74:83:c2:64:0b:87 wlan0: IBSS finish 74:83:c2:64:0b:87 (---from ieee80211_ibss_add_sta) wlan0: Adding new IBSS station 74:83:c2:64:0b:87 wlan0: moving STA 74:83:c2:64:0b:87 to state 2 wlan0: moving STA 74:83:c2:64:0b:87 to state 3 wlan0: Inserted STA 74:83:c2:64:0b:87 wlan0: IBSS finish 74:83:c2:64:0b:87 (---from ieee80211_ibss_work) wlan0: Adding new IBSS station 74:83:c2:64:0b:87 wlan0: moving STA 74:83:c2:64:0b:87 to state 2 wlan0: moving STA 74:83:c2:64:0b:87 to state 3 . . wlan0: expiring inactive not authorized STA 74:83:c2:64:0b:87 wlan0: moving STA 74:83:c2:64:0b:87 to state 2 wlan0: moving STA 74:83:c2:64:0b:87 to state 1 wlan0: Removed STA 74:83:c2:64:0b:87 wlan0: Destroyed STA 74:83:c2:64:0b:87 The ieee80211_ibss_finish_sta() is called twice on the same STA from 2 different locations. On the second attempt, the allocated STA is not destroyed creating a kernel memory leak. This is happening because sta_info_insert_finish() does not call sta_info_free() the second time when the STA already exists (returns -EEXIST). Note that the caller sta_info_insert_rcu() assumes STA is destroyed upon errors. Same fix is applied to -ENOMEM. Signed-off-by: Ahmed Zaki <anzaki@gmail.com> Link: https://lore.kernel.org/r/20211002145329.3125293-1-anzaki@gmail.com [change the error path label to use the existing code] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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