kernel/linux.git/net/mac80211/vht.c, branch v6.6

wifi: mac80211: work around Cisco AP 9115 VHT MPDU length

2023-09-25T06:41:27+00:00

Cisco AP module 9115 with FW 17.3 has a bug and sends a too large maximum MPDU length in the association response (indicating 12k) that it cannot actually process. Work around that by taking the minimum between what's in the association response and the BSS elements (from beacon or probe response). Signed-off-by: Johannes Berg Signed-off-by: Gregory Greenman Link: https://lore.kernel.org/r/20230918140607.d1966a9a532e.I090225babb7cd4d1081ee9acd40e7de7e41c15ae@changeid Signed-off-by: Johannes Berg

wifi: mac80211: Allow NSS change only up to capability

2023-02-14T11:35:02+00:00

Stations can update bandwidth/NSS change in VHT action frame with action type Operating Mode Notification. (IEEE Std 802.11-2020 - 9.4.1.53 Operating Mode field) For Operating Mode Notification, an RX NSS change to a value greater than AP's maximum NSS should not be allowed. During fuzz testing, by forcefully sending VHT Op. mode notif. frames from STA with random rx_nss values, it is found that AP accepts rx_nss values greater that APs maximum NSS instead of discarding such NSS change. Hence allow NSS change only up to maximum NSS that is negotiated and capped to AP's capability during association. Signed-off-by: Rameshkumar Sundaram Link: https://lore.kernel.org/r/20230207114146.10567-1-quic_ramess@quicinc.com Signed-off-by: Johannes Berg

wifi: mac80211: keep A-MSDU data in sta and per-link

2022-09-06T08:17:08+00:00

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 Signed-off-by: Johannes Berg

wifi: mac80211: Support multi link in ieee80211_recalc_min_chandef()

2022-07-15T09:43:20+00:00

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 Signed-off-by: Johannes Berg

wifi: mac80211: RCU-ify link/link_conf pointers

2022-07-15T09:43:14+00:00

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

wifi: mac80211: RCU-ify link STA pointers

2022-06-20T10:57:08+00:00

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

wifi: mac80211: add link_id to vht.c code for MLO

2022-06-20T10:55:25+00:00

Update the code in vht.c and add the link_id parameter where necessary. Signed-off-by: Johannes Berg

wifi: mac80211: make channel context code MLO-aware

2022-06-20T10:55:15+00:00

Make the channel context code MLO aware, along with some functions that it uses, so that the chan.c file is now MLD-clean and no longer uses deflink/bss_conf/etc. Signed-off-by: Johannes Berg

wifi: mac80211: split bss_info_changed method

2022-06-20T10:55:09+00:00

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

wifi: mac80211: move some future per-link data to bss_conf

2022-06-20T10:55:01+00:00

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