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authorLinus Lüssing <linus.luessing@web.de>2011-03-14 22:43:40 +0000
committerSven Eckelmann <sven@narfation.org>2011-04-17 21:11:01 +0200
commit68003903e4eeec5288f074ff0751a381750ceb34 (patch)
tree72577cb46c0e0aaec9edb54a496002d13650f6fb /net/batman-adv
parente1a5382f978b67b5cc36eec65e6046730ce07714 (diff)
downloadop-kernel-dev-68003903e4eeec5288f074ff0751a381750ceb34.zip
op-kernel-dev-68003903e4eeec5288f074ff0751a381750ceb34.tar.gz
batman-adv: Protect global TQ window with a spinlock
Signed-off-by: Linus Lüssing <linus.luessing@web.de> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Sven Eckelmann <sven@narfation.org>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/originator.c1
-rw-r--r--net/batman-adv/routing.c4
-rw-r--r--net/batman-adv/types.h1
3 files changed, 6 insertions, 0 deletions
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index b4cfe36..5b8fe32 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -102,6 +102,7 @@ struct neigh_node *create_neighbor(struct orig_node *orig_node,
INIT_HLIST_NODE(&neigh_node->list);
INIT_LIST_HEAD(&neigh_node->bonding_list);
+ spin_lock_init(&neigh_node->tq_lock);
memcpy(neigh_node->addr, neigh, ETH_ALEN);
neigh_node->orig_node = orig_neigh_node;
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index b7d43ca..f6c6422 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -415,10 +415,12 @@ static void update_orig(struct bat_priv *bat_priv,
if (is_duplicate)
continue;
+ spin_lock_bh(&tmp_neigh_node->tq_lock);
ring_buffer_set(tmp_neigh_node->tq_recv,
&tmp_neigh_node->tq_index, 0);
tmp_neigh_node->tq_avg =
ring_buffer_avg(tmp_neigh_node->tq_recv);
+ spin_unlock_bh(&tmp_neigh_node->tq_lock);
}
if (!neigh_node) {
@@ -443,10 +445,12 @@ static void update_orig(struct bat_priv *bat_priv,
orig_node->flags = batman_packet->flags;
neigh_node->last_valid = jiffies;
+ spin_lock_bh(&neigh_node->tq_lock);
ring_buffer_set(neigh_node->tq_recv,
&neigh_node->tq_index,
batman_packet->tq);
neigh_node->tq_avg = ring_buffer_avg(neigh_node->tq_recv);
+ spin_unlock_bh(&neigh_node->tq_lock);
if (!is_duplicate) {
orig_node->last_ttl = batman_packet->ttl;
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 1854cbb..091476d 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -125,6 +125,7 @@ struct neigh_node {
struct rcu_head rcu;
struct orig_node *orig_node;
struct hard_iface *if_incoming;
+ spinlock_t tq_lock; /* protects: tq_recv, tq_index */
};
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