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authorSven Eckelmann <sven@narfation.org>2015-06-21 14:45:14 +0200
committerAntonio Quartulli <antonio@meshcoding.com>2015-08-25 00:12:23 +0200
commit2c72d655b04450056566bcbfe89c2427376b60b4 (patch)
tree79b4d9eaff924dea2776a3ac3758550d736dd819 /net/batman-adv/main.c
parent7c26a53ba5e7e4bf2be3cb93f2fffaefccff2e3b (diff)
batman-adv: Annotate deleting functions with external lock via lockdep
Functions which use (h)list_del* are requiring correct locking when they operate on global lists. Most of the time the search in the list and the delete are done in the same function. All other cases should have it visible that they require a special lock to avoid race conditions. Lockdep asserts can be used to check these problem during runtime when the lockdep functionality is enabled. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Diffstat (limited to 'net/batman-adv/main.c')
-rw-r--r--net/batman-adv/main.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index d277ba724a86..50fc07b9d353 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -30,6 +30,7 @@
#include <linux/ipv6.h>
#include <linux/kernel.h>
#include <linux/list.h>
+#include <linux/lockdep.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/netdevice.h>
@@ -737,13 +738,17 @@ static u16 batadv_tvlv_container_list_size(struct batadv_priv *bat_priv)
/**
* batadv_tvlv_container_remove - remove tvlv container from the tvlv container
* list
+ * @bat_priv: the bat priv with all the soft interface information
* @tvlv: the to be removed tvlv container
*
* Has to be called with the appropriate locks being acquired
* (tvlv.container_list_lock).
*/
-static void batadv_tvlv_container_remove(struct batadv_tvlv_container *tvlv)
+static void batadv_tvlv_container_remove(struct batadv_priv *bat_priv,
+ struct batadv_tvlv_container *tvlv)
{
+ lockdep_assert_held(&bat_priv->tvlv.handler_list_lock);
+
if (!tvlv)
return;
@@ -768,7 +773,7 @@ void batadv_tvlv_container_unregister(struct batadv_priv *bat_priv,
spin_lock_bh(&bat_priv->tvlv.container_list_lock);
tvlv = batadv_tvlv_container_get(bat_priv, type, version);
- batadv_tvlv_container_remove(tvlv);
+ batadv_tvlv_container_remove(bat_priv, tvlv);
spin_unlock_bh(&bat_priv->tvlv.container_list_lock);
}
@@ -807,7 +812,7 @@ void batadv_tvlv_container_register(struct batadv_priv *bat_priv,
spin_lock_bh(&bat_priv->tvlv.container_list_lock);
tvlv_old = batadv_tvlv_container_get(bat_priv, type, version);
- batadv_tvlv_container_remove(tvlv_old);
+ batadv_tvlv_container_remove(bat_priv, tvlv_old);
hlist_add_head(&tvlv_new->list, &bat_priv->tvlv.container_list);
spin_unlock_bh(&bat_priv->tvlv.container_list_lock);
}