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-rw-r--r--net/mac80211/key.c56
-rw-r--r--net/mac80211/sta_info.c1
-rw-r--r--net/mac80211/sta_info.h2
3 files changed, 55 insertions, 4 deletions
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 44388d6a1d8e..5e5bc599da4c 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -4,6 +4,7 @@
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
+ * Copyright 2015 Intel Deutschland GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -320,7 +321,7 @@ static void ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
return;
if (new)
- list_add_tail(&new->list, &sdata->key_list);
+ list_add_tail_rcu(&new->list, &sdata->key_list);
WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx);
@@ -368,7 +369,7 @@ static void ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
}
if (old)
- list_del(&old->list);
+ list_del_rcu(&old->list);
}
struct ieee80211_key *
@@ -592,8 +593,8 @@ static void ieee80211_key_destroy(struct ieee80211_key *key,
return;
/*
- * Synchronize so the TX path can no longer be using
- * this key before we free/remove it.
+ * Synchronize so the TX path and rcu key iterators
+ * can no longer be using this key before we free/remove it.
*/
synchronize_net();
@@ -744,6 +745,53 @@ void ieee80211_iter_keys(struct ieee80211_hw *hw,
}
EXPORT_SYMBOL(ieee80211_iter_keys);
+static void
+_ieee80211_iter_keys_rcu(struct ieee80211_hw *hw,
+ struct ieee80211_sub_if_data *sdata,
+ void (*iter)(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta,
+ struct ieee80211_key_conf *key,
+ void *data),
+ void *iter_data)
+{
+ struct ieee80211_key *key;
+
+ list_for_each_entry_rcu(key, &sdata->key_list, list) {
+ /* skip keys of station in removal process */
+ if (key->sta && key->sta->removed)
+ continue;
+ if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
+ continue;
+
+ iter(hw, &sdata->vif,
+ key->sta ? &key->sta->sta : NULL,
+ &key->conf, iter_data);
+ }
+}
+
+void ieee80211_iter_keys_rcu(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ void (*iter)(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta,
+ struct ieee80211_key_conf *key,
+ void *data),
+ void *iter_data)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_sub_if_data *sdata;
+
+ if (vif) {
+ sdata = vif_to_sdata(vif);
+ _ieee80211_iter_keys_rcu(hw, sdata, iter, iter_data);
+ } else {
+ list_for_each_entry_rcu(sdata, &local->interfaces, list)
+ _ieee80211_iter_keys_rcu(hw, sdata, iter, iter_data);
+ }
+}
+EXPORT_SYMBOL(ieee80211_iter_keys_rcu);
+
static void ieee80211_free_keys_iface(struct ieee80211_sub_if_data *sdata,
struct list_head *keys)
{
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 723fa30aafc5..4402ad5b27d1 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -883,6 +883,7 @@ static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
}
list_del_rcu(&sta->list);
+ sta->removed = true;
drv_sta_pre_rcu_remove(local, sta->sdata, sta);
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 2cafb21b422f..d6051629ed15 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -367,6 +367,7 @@ DECLARE_EWMA(signal, 1024, 8)
* @mesh: mesh STA information
* @debugfs: debug filesystem info
* @dead: set to true when sta is unlinked
+ * @removed: set to true when sta is being removed from sta_list
* @uploaded: set to true when sta is uploaded to the driver
* @sta: station information we share with the driver
* @sta_state: duplicates information about station state (for debug)
@@ -412,6 +413,7 @@ struct sta_info {
u16 listen_interval;
bool dead;
+ bool removed;
bool uploaded;
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