Commit | Line | Data |
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0046b040 | 1 | /* Copyright (C) 2006-2016 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 | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
c6c8fea2 | 18 | #include "hash.h" |
1e2c2a4f SE |
19 | #include "main.h" |
20 | ||
21 | #include <linux/fs.h> | |
22 | #include <linux/lockdep.h> | |
23 | #include <linux/slab.h> | |
c6c8fea2 SE |
24 | |
25 | /* clears the hash */ | |
5bf74e9c | 26 | static void batadv_hash_init(struct batadv_hashtable *hash) |
c6c8fea2 | 27 | { |
6b5e971a | 28 | u32 i; |
c6c8fea2 | 29 | |
cb4cca71 | 30 | for (i = 0; i < hash->size; i++) { |
c6c8fea2 | 31 | INIT_HLIST_HEAD(&hash->table[i]); |
fb778ea1 ML |
32 | spin_lock_init(&hash->list_locks[i]); |
33 | } | |
c6c8fea2 SE |
34 | } |
35 | ||
36 | /* free only the hashtable and the hash itself. */ | |
5bf74e9c | 37 | void batadv_hash_destroy(struct batadv_hashtable *hash) |
c6c8fea2 | 38 | { |
fb778ea1 | 39 | kfree(hash->list_locks); |
c6c8fea2 SE |
40 | kfree(hash->table); |
41 | kfree(hash); | |
42 | } | |
43 | ||
44 | /* allocates and clears the hash */ | |
6b5e971a | 45 | struct batadv_hashtable *batadv_hash_new(u32 size) |
c6c8fea2 | 46 | { |
5bf74e9c | 47 | struct batadv_hashtable *hash; |
c6c8fea2 | 48 | |
704509b8 | 49 | hash = kmalloc(sizeof(*hash), GFP_ATOMIC); |
c6c8fea2 SE |
50 | if (!hash) |
51 | return NULL; | |
52 | ||
0185dda6 | 53 | hash->table = kmalloc_array(size, sizeof(*hash->table), GFP_ATOMIC); |
fb778ea1 ML |
54 | if (!hash->table) |
55 | goto free_hash; | |
c6c8fea2 | 56 | |
0185dda6 AQ |
57 | hash->list_locks = kmalloc_array(size, sizeof(*hash->list_locks), |
58 | GFP_ATOMIC); | |
fb778ea1 ML |
59 | if (!hash->list_locks) |
60 | goto free_table; | |
c6c8fea2 | 61 | |
fb778ea1 | 62 | hash->size = size; |
7f9f02cb | 63 | batadv_hash_init(hash); |
c6c8fea2 | 64 | return hash; |
fb778ea1 ML |
65 | |
66 | free_table: | |
67 | kfree(hash->table); | |
68 | free_hash: | |
69 | kfree(hash); | |
70 | return NULL; | |
71 | } | |
5d52dad2 | 72 | |
5bf74e9c | 73 | void batadv_hash_set_lock_class(struct batadv_hashtable *hash, |
5d52dad2 SE |
74 | struct lock_class_key *key) |
75 | { | |
6b5e971a | 76 | u32 i; |
5d52dad2 SE |
77 | |
78 | for (i = 0; i < hash->size; i++) | |
79 | lockdep_set_class(&hash->list_locks[i], key); | |
80 | } |