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-rw-r--r--net/wireless/mlme.c153
1 files changed, 148 insertions, 5 deletions
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index 783acd2c4211..c8155a483ec2 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -905,13 +905,13 @@ void cfg80211_dfs_channels_update_work(struct work_struct *work)
}
-void cfg80211_radar_event(struct wiphy *wiphy,
- struct cfg80211_chan_def *chandef,
- gfp_t gfp)
+void __cfg80211_radar_event(struct wiphy *wiphy,
+ struct cfg80211_chan_def *chandef,
+ bool offchan, gfp_t gfp)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
- trace_cfg80211_radar_event(wiphy, chandef);
+ trace_cfg80211_radar_event(wiphy, chandef, offchan);
/* only set the chandef supplied channel to unavailable, in
* case the radar is detected on only one of multiple channels
@@ -919,6 +919,9 @@ void cfg80211_radar_event(struct wiphy *wiphy,
*/
cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
+ if (offchan)
+ queue_work(cfg80211_wq, &rdev->background_cac_abort_wk);
+
cfg80211_sched_dfs_chan_update(rdev);
nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
@@ -926,7 +929,7 @@ void cfg80211_radar_event(struct wiphy *wiphy,
memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def));
queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk);
}
-EXPORT_SYMBOL(cfg80211_radar_event);
+EXPORT_SYMBOL(__cfg80211_radar_event);
void cfg80211_cac_event(struct net_device *netdev,
const struct cfg80211_chan_def *chandef,
@@ -970,3 +973,143 @@ void cfg80211_cac_event(struct net_device *netdev,
nl80211_radar_notify(rdev, chandef, event, netdev, gfp);
}
EXPORT_SYMBOL(cfg80211_cac_event);
+
+static void
+__cfg80211_background_cac_event(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev,
+ const struct cfg80211_chan_def *chandef,
+ enum nl80211_radar_event event)
+{
+ struct wiphy *wiphy = &rdev->wiphy;
+ struct net_device *netdev;
+
+ lockdep_assert_wiphy(&rdev->wiphy);
+
+ if (!cfg80211_chandef_valid(chandef))
+ return;
+
+ if (!rdev->background_radar_wdev)
+ return;
+
+ switch (event) {
+ case NL80211_RADAR_CAC_FINISHED:
+ cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
+ memcpy(&rdev->cac_done_chandef, chandef, sizeof(*chandef));
+ queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
+ cfg80211_sched_dfs_chan_update(rdev);
+ wdev = rdev->background_radar_wdev;
+ break;
+ case NL80211_RADAR_CAC_ABORTED:
+ if (!cancel_delayed_work(&rdev->background_cac_done_wk))
+ return;
+ wdev = rdev->background_radar_wdev;
+ break;
+ case NL80211_RADAR_CAC_STARTED:
+ break;
+ default:
+ return;
+ }
+
+ netdev = wdev ? wdev->netdev : NULL;
+ nl80211_radar_notify(rdev, chandef, event, netdev, GFP_KERNEL);
+}
+
+static void
+cfg80211_background_cac_event(struct cfg80211_registered_device *rdev,
+ const struct cfg80211_chan_def *chandef,
+ enum nl80211_radar_event event)
+{
+ wiphy_lock(&rdev->wiphy);
+ __cfg80211_background_cac_event(rdev, rdev->background_radar_wdev,
+ chandef, event);
+ wiphy_unlock(&rdev->wiphy);
+}
+
+void cfg80211_background_cac_done_wk(struct work_struct *work)
+{
+ struct delayed_work *delayed_work = to_delayed_work(work);
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(delayed_work, struct cfg80211_registered_device,
+ background_cac_done_wk);
+ cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef,
+ NL80211_RADAR_CAC_FINISHED);
+}
+
+void cfg80211_background_cac_abort_wk(struct work_struct *work)
+{
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(work, struct cfg80211_registered_device,
+ background_cac_abort_wk);
+ cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef,
+ NL80211_RADAR_CAC_ABORTED);
+}
+
+void cfg80211_background_cac_abort(struct wiphy *wiphy)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+ queue_work(cfg80211_wq, &rdev->background_cac_abort_wk);
+}
+EXPORT_SYMBOL(cfg80211_background_cac_abort);
+
+int
+cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev,
+ struct cfg80211_chan_def *chandef)
+{
+ unsigned int cac_time_ms;
+ int err;
+
+ lockdep_assert_wiphy(&rdev->wiphy);
+
+ if (!wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_RADAR_BACKGROUND))
+ return -EOPNOTSUPP;
+
+ /* Offchannel chain already locked by another wdev */
+ if (rdev->background_radar_wdev && rdev->background_radar_wdev != wdev)
+ return -EBUSY;
+
+ /* CAC already in progress on the offchannel chain */
+ if (rdev->background_radar_wdev == wdev &&
+ delayed_work_pending(&rdev->background_cac_done_wk))
+ return -EBUSY;
+
+ err = rdev_set_radar_background(rdev, chandef);
+ if (err)
+ return err;
+
+ cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, chandef);
+ if (!cac_time_ms)
+ cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
+
+ rdev->background_radar_chandef = *chandef;
+ rdev->background_radar_wdev = wdev; /* Get offchain ownership */
+
+ __cfg80211_background_cac_event(rdev, wdev, chandef,
+ NL80211_RADAR_CAC_STARTED);
+ queue_delayed_work(cfg80211_wq, &rdev->background_cac_done_wk,
+ msecs_to_jiffies(cac_time_ms));
+
+ return 0;
+}
+
+void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev)
+{
+ struct wiphy *wiphy = wdev->wiphy;
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+ lockdep_assert_wiphy(wiphy);
+
+ if (wdev != rdev->background_radar_wdev)
+ return;
+
+ rdev_set_radar_background(rdev, NULL);
+ rdev->background_radar_wdev = NULL; /* Release offchain ownership */
+
+ __cfg80211_background_cac_event(rdev, wdev,
+ &rdev->background_radar_chandef,
+ NL80211_RADAR_CAC_ABORTED);
+}