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-rw-r--r--net/batman-adv/hash.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/net/batman-adv/hash.c b/net/batman-adv/hash.c
new file mode 100644
index 000000000000..26e623eb9def
--- /dev/null
+++ b/net/batman-adv/hash.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2006-2010 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "hash.h"
+
+/* clears the hash */
+static void hash_init(struct hashtable_t *hash)
+{
+ int i;
+
+ for (i = 0 ; i < hash->size; i++)
+ INIT_HLIST_HEAD(&hash->table[i]);
+}
+
+/* free only the hashtable and the hash itself. */
+void hash_destroy(struct hashtable_t *hash)
+{
+ kfree(hash->table);
+ kfree(hash);
+}
+
+/* allocates and clears the hash */
+struct hashtable_t *hash_new(int size)
+{
+ struct hashtable_t *hash;
+
+ hash = kmalloc(sizeof(struct hashtable_t) , GFP_ATOMIC);
+
+ if (!hash)
+ return NULL;
+
+ hash->size = size;
+ hash->table = kmalloc(sizeof(struct element_t *) * size, GFP_ATOMIC);
+
+ if (!hash->table) {
+ kfree(hash);
+ return NULL;
+ }
+
+ hash_init(hash);
+
+ return hash;
+}