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| author | Sven Eckelmann <sven@narfation.org> | 2016-01-16 10:29:53 +0100 |
|---|---|---|
| committer | Antonio Quartulli <a@unstable.cc> | 2016-02-10 23:24:04 +0800 |
| commit | 77ae32e8989a26d24bd8007be3b9dc4a348175a9 (patch) | |
| tree | 0e2960ffcb0a0850cfe684a5de6094d1101c0a3f /net/batman-adv/originator.c | |
| parent | a6ba0d340db63b95cd07484370cca69929d8f4e4 (diff) | |
| download | op-kernel-dev-77ae32e8989a26d24bd8007be3b9dc4a348175a9.zip op-kernel-dev-77ae32e8989a26d24bd8007be3b9dc4a348175a9.tar.gz | |
batman-adv: Convert batadv_neigh_node to kref
batman-adv uses a self-written reference implementation which is just based
on atomic_t. This is less obvious when reading the code than kref and
therefore increases the change that the reference counting will be missed.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Diffstat (limited to 'net/batman-adv/originator.c')
| -rw-r--r-- | net/batman-adv/originator.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index 428983a..9e3dbd8 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -229,15 +229,17 @@ void batadv_hardif_neigh_free_ref(struct batadv_hardif_neigh_node *hardif_neigh) /** * batadv_neigh_node_release - release neigh_node from lists and queue for * free after rcu grace period - * @neigh_node: neigh neighbor to free + * @ref: kref pointer of the neigh_node */ -static void batadv_neigh_node_release(struct batadv_neigh_node *neigh_node) +static void batadv_neigh_node_release(struct kref *ref) { struct hlist_node *node_tmp; + struct batadv_neigh_node *neigh_node; struct batadv_hardif_neigh_node *hardif_neigh; struct batadv_neigh_ifinfo *neigh_ifinfo; struct batadv_algo_ops *bao; + neigh_node = container_of(ref, struct batadv_neigh_node, refcount); bao = neigh_node->orig_node->bat_priv->bat_algo_ops; hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, @@ -262,14 +264,13 @@ static void batadv_neigh_node_release(struct batadv_neigh_node *neigh_node) } /** - * batadv_neigh_node_free_ref - decrement the neighbors refcounter - * and possibly release it + * batadv_neigh_node_free_ref - decrement the neighbors refcounter and possibly + * release it * @neigh_node: neigh neighbor to free */ void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) { - if (atomic_dec_and_test(&neigh_node->refcount)) - batadv_neigh_node_release(neigh_node); + kref_put(&neigh_node->refcount, batadv_neigh_node_release); } /** @@ -298,7 +299,7 @@ batadv_orig_router_get(struct batadv_orig_node *orig_node, break; } - if (router && !atomic_inc_not_zero(&router->refcount)) + if (router && !kref_get_unless_zero(&router->refcount)) router = NULL; rcu_read_unlock(); @@ -491,7 +492,7 @@ batadv_neigh_node_get(const struct batadv_orig_node *orig_node, if (tmp_neigh_node->if_incoming != hard_iface) continue; - if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) + if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) continue; res = tmp_neigh_node; @@ -649,7 +650,8 @@ batadv_neigh_node_new(struct batadv_orig_node *orig_node, neigh_node->orig_node = orig_node; /* extra reference for return */ - atomic_set(&neigh_node->refcount, 2); + kref_init(&neigh_node->refcount); + kref_get(&neigh_node->refcount); spin_lock_bh(&orig_node->neigh_list_lock); hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); @@ -1084,7 +1086,7 @@ batadv_find_best_neighbor(struct batadv_priv *bat_priv, best, if_outgoing) <= 0)) continue; - if (!atomic_inc_not_zero(&neigh->refcount)) + if (!kref_get_unless_zero(&neigh->refcount)) continue; if (best) |
