From: Gautam Kumar Shukla <gautams@xxxxxxxxxxxx>
With the wiphy::features flag being used up this patch adds a
new field wiphy::ext_features. Considering extensibility this
new field is declared as a byte array. This extensible flag is
exposed to user-space by NL80211_ATTR_EXT_FEATURES.
Cc: Avinash Patil <patila@xxxxxxxxxxx>
Signed-off-by: Gautam (Gautam Kumar) Shukla <gautams@xxxxxxxxxxxx>
Signed-off-by: Arend van Spriel <arend@xxxxxxxxxxxx>
---
include/net/cfg80211.h | 39 +++++++++++++++++++++++++++++++++++++++
include/uapi/linux/nl80211.h | 22 ++++++++++++++++++++++
net/wireless/nl80211.c | 5 +++++
3 files changed, 66 insertions(+)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index bd672ea..f38645f 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -3016,6 +3016,8 @@ struct wiphy_vendor_command {
* @regulatory_flags: wiphy regulatory flags, see
* &enum ieee80211_regulatory_flags
* @features: features advertised to nl80211, see &enum nl80211_feature_flags.
+ * @ext_features: extended features advertised to nl80211, see
+ * &enum nl80211_ext_feature_index.
* @bss_priv_size: each BSS struct has private data allocated with it,
* this variable determines its size
* @max_scan_ssids: maximum number of SSIDs the device can scan for in
@@ -3125,6 +3127,7 @@ struct wiphy {
u16 max_acl_mac_addrs;
u32 flags, regulatory_flags, features;
+ u8 ext_features[DIV_ROUND_UP(NUM_NL80211_EXT_FEATURES, 8)];
u32 ap_sme_capa;
@@ -5052,6 +5055,42 @@ void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
*/
void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy);
+/**
+ * wiphy_ext_feature_set - set the extended feature flag
+ *
+ * @wiphy: the wiphy to modify.
+ * @ftidx: extended feature bit index.
+ *
+ * The extended features are flagged in multiple bytes (see
+ * &struct wiphy.@ext_features)
+ */
+static inline void wiphy_ext_feature_set(struct wiphy *wiphy,
+ enum nl80211_ext_feature_index ftidx)
+{
+ u8 *ft_byte;
+
+ ft_byte = &wiphy->ext_features[ftidx / 8];
+ *ft_byte |= BIT(ftidx % 8);
+}
+
+/**
+ * wiphy_ext_feature_isset - check the extended feature flag
+ *
+ * @wiphy: the wiphy to modify.
+ * @ftidx: extended feature bit index.
+ *
+ * The extended features are flagged in multiple bytes (see
+ * &struct wiphy.@ext_features)
+ */
+static inline bool
+wiphy_ext_feature_isset(struct wiphy *wiphy,
+ enum nl80211_ext_feature_index ftidx)
+{
+ u8 ft_byte;
+
+ ft_byte = wiphy->ext_features[ftidx / 8];
+ return (ft_byte & BIT(ftidx % 8)) != 0;
+}
/* ethtool helper */
void cfg80211_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info);
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 18cb0aa..0fe36b4 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -1713,6 +1713,13 @@ enum nl80211_commands {
* obtained from it is coming from the device's wiphy and not the global
* cfg80211 regdomain.
*
+ * @NL80211_ATTR_EXT_FEATURES: extended feature flags contained in a byte
+ * array. The feature flags are identified by their bit index (see &enum
+ * nl80211_ext_feature_index). The bit index is ordered starting at the
+ * least-significant bit of the first byte in the array, ie. bit index 0
+ * is located at bit 0 of byte 0. bit index 25 would be located at bit 1
+ * of byte 3 (u8 array).
+ *
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@@ -2072,6 +2079,8 @@ enum nl80211_attrs {
NL80211_ATTR_WIPHY_SELF_MANAGED_REG,
+ NL80211_ATTR_EXT_FEATURES,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -4221,6 +4230,19 @@ enum nl80211_feature_flags {
};
/**
+ * enum nl80211_ext_feature_index - bit index of extended features.
+ *
+ * @NUM_NL80211_EXT_FEATURES: number of extended features.
+ * @MAX_NL80211_EXT_FEATURES: highest extended feature index.
+ */
+enum nl80211_ext_feature_index {
+
+ /* add new features before the definition below */
+ NUM_NL80211_EXT_FEATURES,
+ MAX_NL80211_EXT_FEATURES = NUM_NL80211_EXT_FEATURES - 1
+};
+
+/**
* enum nl80211_probe_resp_offload_support_attr - optional supported
* protocols for probe-response offloading by the driver/FW.
* To be used with the %NL80211_ATTR_PROBE_RESP_OFFLOAD attribute.
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 7029201..689e1a8 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1706,6 +1706,11 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
goto nla_put_failure;
+ if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
+ sizeof(rdev->wiphy.ext_features),
+ rdev->wiphy.ext_features))
+ goto nla_put_failure;
+
/* done */
state->split_start = 0;
break;
--
1.9.1
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