From: Johannes Berg <[email protected]>
If userspace is updated to deal with large split wiphy
information dumps, add back the radar information to
each channel that previously pushed the data over the
limit of a single netlink message.
Cc: Simon Wunderlich <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
---
net/wireless/nl80211.c | 29 ++++++++++++++++++++++-------
1 file changed, 22 insertions(+), 7 deletions(-)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index fff4160..945ca2b 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -540,7 +540,8 @@ static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
}
static int nl80211_msg_put_channel(struct sk_buff *msg,
- struct ieee80211_channel *chan)
+ struct ieee80211_channel *chan,
+ bool large)
{
if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
chan->center_freq))
@@ -555,9 +556,22 @@ static int nl80211_msg_put_channel(struct sk_buff *msg,
if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
goto nla_put_failure;
- if ((chan->flags & IEEE80211_CHAN_RADAR) &&
- nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
- goto nla_put_failure;
+ if (chan->flags & IEEE80211_CHAN_RADAR) {
+ if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
+ goto nla_put_failure;
+ if (large) {
+ u32 time;
+
+ time = elapsed_jiffies_msecs(chan->dfs_state_entered);
+
+ if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
+ chan->dfs_state))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
+ time))
+ goto nla_put_failure;
+ }
+ }
if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
goto nla_put_failure;
@@ -1289,7 +1303,8 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
chan = &sband->channels[i];
- if (nl80211_msg_put_channel(msg, chan))
+ if (nl80211_msg_put_channel(msg, chan,
+ split))
goto nla_put_failure;
nla_nest_end(msg, nl_freq);
@@ -9405,7 +9420,7 @@ void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
if (!nl_freq)
goto nla_put_failure;
- if (nl80211_msg_put_channel(msg, channel_before))
+ if (nl80211_msg_put_channel(msg, channel_before, false))
goto nla_put_failure;
nla_nest_end(msg, nl_freq);
@@ -9413,7 +9428,7 @@ void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
if (!nl_freq)
goto nla_put_failure;
- if (nl80211_msg_put_channel(msg, channel_after))
+ if (nl80211_msg_put_channel(msg, channel_after, false))
goto nla_put_failure;
nla_nest_end(msg, nl_freq);
--
1.8.0