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cfg80211: allow advertising vendor-specific capabilities

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There may be cases where vendor-specific elements need to be
used over the air. Rather than have driver or firmware add
them and possibly cause problems that way, add them to the
iftype-data band capabilities. This way we can advertise to
userspace first, and use them in mac80211 next.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.e8c4f0347276.Iee5964682b3e9ec51fc1cd57a7c62383eaf6ddd7@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2021-06-18 13:41:52 +03:00
parent 1b7b3ac8ff
commit f4f8650588
3 changed files with 15 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
include/net/cfg80211.h
View file

@ -371,11 +371,18 @@ struct ieee80211_sta_he_cap {
* @he_cap: holds the HE capabilities
* @he_6ghz_capa: HE 6 GHz capabilities, must be filled in for a
* 6 GHz band channel (and 0 may be valid value).
* @vendor_elems: vendor element(s) to advertise
* @vendor_elems.data: vendor element(s) data
* @vendor_elems.len: vendor element(s) length
*/
struct ieee80211_sband_iftype_data {
u16 types_mask;
struct ieee80211_sta_he_cap he_cap;
struct ieee80211_he_6ghz_capa he_6ghz_capa;
struct {
const u8 *data;
unsigned int len;
} vendor_elems;
};
/**

3
include/uapi/linux/nl80211.h
View file

@ -3654,6 +3654,8 @@ enum nl80211_mpath_info {
* defined
* @NL80211_BAND_IFTYPE_ATTR_HE_6GHZ_CAPA: HE 6GHz band capabilities (__le16),
* given for all 6 GHz band channels
* @NL80211_BAND_IFTYPE_ATTR_VENDOR_ELEMS: vendor element capabilities that are
* advertised on this band/for this iftype (binary)
* @__NL80211_BAND_IFTYPE_ATTR_AFTER_LAST: internal use
*/
enum nl80211_band_iftype_attr {
@ -3665,6 +3667,7 @@ enum nl80211_band_iftype_attr {
NL80211_BAND_IFTYPE_ATTR_HE_CAP_MCS_SET,
NL80211_BAND_IFTYPE_ATTR_HE_CAP_PPE,
NL80211_BAND_IFTYPE_ATTR_HE_6GHZ_CAPA,
NL80211_BAND_IFTYPE_ATTR_VENDOR_ELEMS,
/* keep last */
__NL80211_BAND_IFTYPE_ATTR_AFTER_LAST,

5
net/wireless/nl80211.c
View file

@ -1731,6 +1731,11 @@ nl80211_send_iftype_data(struct sk_buff *msg,
&iftdata->he_6ghz_capa))
return -ENOBUFS;
if (iftdata->vendor_elems.data && iftdata->vendor_elems.len &&
nla_put(msg, NL80211_BAND_IFTYPE_ATTR_VENDOR_ELEMS,
iftdata->vendor_elems.len, iftdata->vendor_elems.data))
return -ENOBUFS;
return 0;
}