mirror-linux/include
Kavita Kavita 7c598c653a wifi: cfg80211: Add support for link reconfiguration negotiation offload to driver
In the case of SME-in-driver, the driver can internally choose to
update the links based on the AP MLD recommendation and do link
reconfiguration negotiation with AP MLD.
(e.g., After the driver processing the BSS Transition Management request
frame received from the AP MLD with Neighbor Report containing
Multi-Link element with recommended links information chooses to do link
reconfiguration negotiation with AP MLD).

To support this, extend cfg80211_mlo_reconf_add_done() and
NL80211_CMD_ASSOC_MLO_RECONF to indicate added links information for
driver-initiated link reconfiguration requests. For removed links,
the driver indicates links information using the
NL80211_CMD_LINKS_REMOVED event for driver-initiated cases, the same as
supplicant initiated cases.

For the driver-initiated case, cfg80211 will receive link
reconfiguration result asynchronously from driver so holding BSSes of
the accepted add links is needed in the event path. Also, no need of
unhold call for the rejected add link BSSes since there was no hold call
happened previously.

Once the supplicant receives the NL80211_CMD_ASSOC_MLO_RECONF event,
it needs to process the information about newly added links and install
per-link group keys (e.g., GTK/IGTK/BIGTK etc.).

In case of the SME-in-driver, using a vendor interface etc. to notify
the supplicant to initiate a link reconfiguration request and then
supplicant sending command to the cfg80211 can lead to race conditions.
The correct design to avoid this is that the driver indicates the
cfg80211 directly with the results of the link reconfiguration
negotiation.

Signed-off-by: Kavita Kavita <quic_kkavita@quicinc.com>
Link: https://patch.msgid.link/20250604105757.2542-3-quic_kkavita@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2025-06-20 10:46:31 +02:00
..
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