diff options
Diffstat (limited to 'net/batman-adv/originator.c')
| -rw-r--r-- | net/batman-adv/originator.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index 2967b86c13da..0a565d0422bb 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -30,10 +30,12 @@ #include <linux/netdevice.h> #include <linux/netlink.h> #include <linux/rculist.h> +#include <linux/rcupdate.h> #include <linux/seq_file.h> #include <linux/skbuff.h> #include <linux/slab.h> #include <linux/spinlock.h> +#include <linux/stddef.h> #include <linux/workqueue.h> #include <net/sock.h> #include <uapi/linux/batman_adv.h> @@ -55,6 +57,36 @@ /* hash class keys */ static struct lock_class_key batadv_orig_hash_lock_class_key; +struct batadv_orig_node * +batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data) +{ + struct batadv_hashtable *hash = bat_priv->orig_hash; + struct hlist_head *head; + struct batadv_orig_node *orig_node, *orig_node_tmp = NULL; + int index; + + if (!hash) + return NULL; + + index = batadv_choose_orig(data, hash->size); + head = &hash->table[index]; + + rcu_read_lock(); + hlist_for_each_entry_rcu(orig_node, head, hash_entry) { + if (!batadv_compare_eth(orig_node, data)) + continue; + + if (!kref_get_unless_zero(&orig_node->refcount)) + continue; + + orig_node_tmp = orig_node; + break; + } + rcu_read_unlock(); + + return orig_node_tmp; +} + static void batadv_purge_orig(struct work_struct *work); /** |