On 12/19/14 10:18, Johannes Berg wrote:
On Thu, 2014-12-18 at 21:42 +0100, Arend van Spriel wrote:
+ u8 ext_features[(NUM_NL80211_EXT_FEATURES / 8) + 1];
Should probably use DIV_ROUND_UP() here.
Will do.
+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;
+}
Don't really need != 0 (but doesn't hurt either) since the type
promotion is to bool in the return value.
It is a personal preference to use logical expression for a bool return.
/**
+ * enum nl80211_ext_feature_index - bit index of extended features.
+ *
+ * @NL80211_EXT_FEATURE_4WAY_HANDSHAKE: the device supports 4way handshake
+ */
+enum nl80211_ext_feature_index {
+ NL80211_EXT_FEATURE_4WAY_HANDSHAKE,
+
+ /* add new features before the definition below */
+ NUM_NL80211_EXT_FEATURES,
+ MAX_NL80211_EXT_FEATURES = NUM_NL80211_EXT_FEATURES - 1
+};
Don't think you need MAX_? Also you should add NUM_ to the documentation
(and MAX_ also if you want to keep it)
True. Just added it for consistency with other enumerations. Maybe the
API users can find good use for it ;-) I will add the kerneldoc.
+++ b/net/wireless/nl80211.c
@@ -1603,6 +1603,11 @@ static int nl80211_send_wiphy(struct
cfg80211_registered_device *rdev,
if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
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;
I don't think this should go here - I can see how it's tempting to put
it with the feature flags but there's a size limit issue with the wiphy
data on old userspace, so this should go towards the end to deal with
the split data.
I suspected that. Will change it.
Regards,
Arend
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