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cfg80211: Indicate MLO connection info in connect and roam callbacks

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The MLO links used for connection with an MLD AP are decided by the
driver in case of SME offloaded to driver.

Add support for the drivers to indicate the information of links used
for MLO connection in connect and roam callbacks, update the connected
links information in wdev from connect/roam result sent by driver.
Also, send the connected links information to userspace.

Add a netlink flag attribute to indicate that userspace supports
handling of MLO connection. Drivers must not do MLO connection when this
flag is not set. This is to maintain backwards compatibility with older
supplicant versions which doesn't have support for MLO connection.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Veerendranath Jakkam 2022-06-08 14:46:37 +05:30 • committed by Johannes Berg
parent 245e5ebc6a
commit efbabc1165
11 changed files with 481 additions and 149 deletions
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6
include/uapi/linux/nl80211.h
View file

@ -2690,6 +2690,10 @@ enum nl80211_commands {
* @NL80211_ATTR_MLD_ADDR: An MLD address, used with various commands such as
* authenticate/associate.
*
* @NL80211_ATTR_MLO_SUPPORT: Flag attribute to indicate user space supports MLO
* connection. Used with %NL80211_CMD_CONNECT. If this attribute is not
* included in NL80211_CMD_CONNECT drivers must not perform MLO connection.
*
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@ -3208,6 +3212,8 @@ enum nl80211_attrs {
NL80211_ATTR_MLO_LINK_ID,
NL80211_ATTR_MLD_ADDR,
NL80211_ATTR_MLO_SUPPORT,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,