From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- net/batman-adv/hash.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 net/batman-adv/hash.c (limited to 'net/batman-adv/hash.c') diff --git a/net/batman-adv/hash.c b/net/batman-adv/hash.c new file mode 100644 index 000000000..7c1c63080 --- /dev/null +++ b/net/batman-adv/hash.c @@ -0,0 +1,76 @@ +/* Copyright (C) 2006-2014 B.A.T.M.A.N. contributors: + * + * Simon Wunderlich, Marek Lindner + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see . + */ + +#include "main.h" +#include "hash.h" + +/* clears the hash */ +static void batadv_hash_init(struct batadv_hashtable *hash) +{ + uint32_t i; + + for (i = 0; i < hash->size; i++) { + INIT_HLIST_HEAD(&hash->table[i]); + spin_lock_init(&hash->list_locks[i]); + } +} + +/* free only the hashtable and the hash itself. */ +void batadv_hash_destroy(struct batadv_hashtable *hash) +{ + kfree(hash->list_locks); + kfree(hash->table); + kfree(hash); +} + +/* allocates and clears the hash */ +struct batadv_hashtable *batadv_hash_new(uint32_t size) +{ + struct batadv_hashtable *hash; + + hash = kmalloc(sizeof(*hash), GFP_ATOMIC); + if (!hash) + return NULL; + + hash->table = kmalloc_array(size, sizeof(*hash->table), GFP_ATOMIC); + if (!hash->table) + goto free_hash; + + hash->list_locks = kmalloc_array(size, sizeof(*hash->list_locks), + GFP_ATOMIC); + if (!hash->list_locks) + goto free_table; + + hash->size = size; + batadv_hash_init(hash); + return hash; + +free_table: + kfree(hash->table); +free_hash: + kfree(hash); + return NULL; +} + +void batadv_hash_set_lock_class(struct batadv_hashtable *hash, + struct lock_class_key *key) +{ + uint32_t i; + + for (i = 0; i < hash->size; i++) + lockdep_set_class(&hash->list_locks[i], key); +} -- cgit v1.2.3-54-g00ecf