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9cfc7bd6 | 1 | /* Copyright (C) 2006-2012 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
3 | * Simon Wunderlich, Marek Lindner | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
21 | #include "hash.h" | |
22 | ||
23 | /* clears the hash */ | |
5bf74e9c | 24 | static void batadv_hash_init(struct batadv_hashtable *hash) |
c6c8fea2 | 25 | { |
c90681b8 | 26 | uint32_t i; |
c6c8fea2 | 27 | |
cb4cca71 | 28 | for (i = 0; i < hash->size; i++) { |
c6c8fea2 | 29 | INIT_HLIST_HEAD(&hash->table[i]); |
fb778ea1 ML |
30 | spin_lock_init(&hash->list_locks[i]); |
31 | } | |
c6c8fea2 SE |
32 | } |
33 | ||
34 | /* free only the hashtable and the hash itself. */ | |
5bf74e9c | 35 | void batadv_hash_destroy(struct batadv_hashtable *hash) |
c6c8fea2 | 36 | { |
fb778ea1 | 37 | kfree(hash->list_locks); |
c6c8fea2 SE |
38 | kfree(hash->table); |
39 | kfree(hash); | |
40 | } | |
41 | ||
42 | /* allocates and clears the hash */ | |
5bf74e9c | 43 | struct batadv_hashtable *batadv_hash_new(uint32_t size) |
c6c8fea2 | 44 | { |
5bf74e9c | 45 | struct batadv_hashtable *hash; |
c6c8fea2 | 46 | |
704509b8 | 47 | hash = kmalloc(sizeof(*hash), GFP_ATOMIC); |
c6c8fea2 SE |
48 | if (!hash) |
49 | return NULL; | |
50 | ||
704509b8 | 51 | hash->table = kmalloc(sizeof(*hash->table) * size, GFP_ATOMIC); |
fb778ea1 ML |
52 | if (!hash->table) |
53 | goto free_hash; | |
c6c8fea2 | 54 | |
704509b8 SE |
55 | hash->list_locks = kmalloc(sizeof(*hash->list_locks) * size, |
56 | GFP_ATOMIC); | |
fb778ea1 ML |
57 | if (!hash->list_locks) |
58 | goto free_table; | |
c6c8fea2 | 59 | |
fb778ea1 | 60 | hash->size = size; |
7f9f02cb | 61 | batadv_hash_init(hash); |
c6c8fea2 | 62 | return hash; |
fb778ea1 ML |
63 | |
64 | free_table: | |
65 | kfree(hash->table); | |
66 | free_hash: | |
67 | kfree(hash); | |
68 | return NULL; | |
69 | } | |
5d52dad2 | 70 | |
5bf74e9c | 71 | void batadv_hash_set_lock_class(struct batadv_hashtable *hash, |
5d52dad2 SE |
72 | struct lock_class_key *key) |
73 | { | |
74 | uint32_t i; | |
75 | ||
76 | for (i = 0; i < hash->size; i++) | |
77 | lockdep_set_class(&hash->list_locks[i], key); | |
78 | } |