mac80211: Implement add_nan_func and rm_nan_func

Implement add/rm_nan_func functions and handle NAN function
termination notifications. Handle instance_id allocation for
NAN functions and implement the reconfig flow.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 47 insertions, 1 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 5b57fcaaec9b..91754c8dafb2 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1749,6 +1749,46 @@ static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
 	mutex_unlock(&local->sta_mtx);
 }
 
+static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
+{
+	struct cfg80211_nan_func *func, **funcs;
+	int res, id, i = 0;
+
+	res = drv_start_nan(sdata->local, sdata,
+			    &sdata->u.nan.conf);
+	if (WARN_ON(res))
+		return res;
+
+	funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
+			sizeof(*funcs), GFP_KERNEL);
+	if (!funcs)
+		return -ENOMEM;
+
+	/* Add all the functions:
+	 * This is a little bit ugly. We need to call a potentially sleeping
+	 * callback for each NAN function, so we can't hold the spinlock.
+	 */
+	spin_lock_bh(&sdata->u.nan.func_lock);
+
+	idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
+		funcs[i++] = func;
+
+	spin_unlock_bh(&sdata->u.nan.func_lock);
+
+	for (i = 0; funcs[i]; i++) {
+		res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
+		if (WARN_ON(res))
+			ieee80211_nan_func_terminated(&sdata->vif,
+						      funcs[i]->instance_id,
+						      NL80211_NAN_FUNC_TERM_REASON_ERROR,
+						      GFP_KERNEL);
+	}
+
+	kfree(funcs);
+
+	return 0;
+}
+
 int ieee80211_reconfig(struct ieee80211_local *local)
 {
 	struct ieee80211_hw *hw = &local->hw;
@@ -1972,11 +2012,17 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 				ieee80211_bss_info_change_notify(sdata, changed);
 			}
 			break;
+		case NL80211_IFTYPE_NAN:
+			res = ieee80211_reconfig_nan(sdata);
+			if (res < 0) {
+				ieee80211_handle_reconfig_failure(local);
+				return res;
+			}
+			break;
 		case NL80211_IFTYPE_WDS:
 		case NL80211_IFTYPE_AP_VLAN:
 		case NL80211_IFTYPE_MONITOR:
 		case NL80211_IFTYPE_P2P_DEVICE:
-		case NL80211_IFTYPE_NAN:
 			/* nothing to do */
 			break;
 		case NL80211_IFTYPE_UNSPECIFIED: