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9f6446c7 | 1 | /* Copyright (C) 2007-2015 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
3 | * Marek Lindner, Simon Wunderlich | |
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 | ||
18 | #ifndef _NET_BATMAN_ADV_ORIGINATOR_H_ | |
19 | #define _NET_BATMAN_ADV_ORIGINATOR_H_ | |
20 | ||
1e2c2a4f SE |
21 | #include "main.h" |
22 | ||
23 | #include <linux/atomic.h> | |
24 | #include <linux/compiler.h> | |
25 | #include <linux/if_ether.h> | |
26 | #include <linux/jhash.h> | |
27 | #include <linux/rculist.h> | |
28 | #include <linux/rcupdate.h> | |
29 | #include <linux/stddef.h> | |
30 | #include <linux/types.h> | |
31 | ||
7aadf889 ML |
32 | #include "hash.h" |
33 | ||
1e2c2a4f SE |
34 | struct seq_file; |
35 | ||
bbad0a5e | 36 | int batadv_compare_orig(const struct hlist_node *node, const void *data2); |
56303d34 SE |
37 | int batadv_originator_init(struct batadv_priv *bat_priv); |
38 | void batadv_originator_free(struct batadv_priv *bat_priv); | |
39 | void batadv_purge_orig_ref(struct batadv_priv *bat_priv); | |
40 | void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node); | |
72822225 | 41 | void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node); |
bbad0a5e | 42 | struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, |
6b5e971a | 43 | const u8 *addr); |
cef63419 ML |
44 | struct batadv_hardif_neigh_node * |
45 | batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface, | |
46 | const u8 *neigh_addr); | |
47 | void | |
48 | batadv_hardif_neigh_free_ref(struct batadv_hardif_neigh_node *hardif_neigh); | |
56303d34 | 49 | struct batadv_neigh_node * |
3f32f8a6 ML |
50 | batadv_neigh_node_new(struct batadv_orig_node *orig_node, |
51 | struct batadv_hard_iface *hard_iface, | |
52 | const u8 *neigh_addr); | |
56303d34 SE |
53 | void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node); |
54 | struct batadv_neigh_node * | |
7351a482 SW |
55 | batadv_orig_router_get(struct batadv_orig_node *orig_node, |
56 | const struct batadv_hard_iface *if_outgoing); | |
89652331 SW |
57 | struct batadv_neigh_ifinfo * |
58 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
59 | struct batadv_hard_iface *if_outgoing); | |
60 | struct batadv_neigh_ifinfo * | |
61 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
62 | struct batadv_hard_iface *if_outgoing); | |
63 | void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo); | |
7351a482 | 64 | |
7587405a ML |
65 | int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset); |
66 | ||
7351a482 SW |
67 | struct batadv_orig_ifinfo * |
68 | batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, | |
69 | struct batadv_hard_iface *if_outgoing); | |
70 | struct batadv_orig_ifinfo * | |
71 | batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, | |
72 | struct batadv_hard_iface *if_outgoing); | |
73 | void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo); | |
74 | ||
7d211efc | 75 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset); |
cb1c92ec | 76 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset); |
56303d34 SE |
77 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
78 | int max_if_num); | |
79 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, | |
80 | int max_if_num); | |
7ea7b4a1 AQ |
81 | struct batadv_orig_node_vlan * |
82 | batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, | |
83 | unsigned short vid); | |
84 | struct batadv_orig_node_vlan * | |
85 | batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, | |
86 | unsigned short vid); | |
87 | void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan); | |
c6c8fea2 | 88 | |
9cfc7bd6 SE |
89 | /* hashfunction to choose an entry in a hash table of given size |
90 | * hash algorithm from http://en.wikipedia.org/wiki/Hash_table | |
91 | */ | |
6b5e971a | 92 | static inline u32 batadv_choose_orig(const void *data, u32 size) |
c6c8fea2 | 93 | { |
6b5e971a | 94 | u32 hash = 0; |
c6c8fea2 | 95 | |
36fd61cb | 96 | hash = jhash(data, ETH_ALEN, hash); |
c6c8fea2 SE |
97 | return hash % size; |
98 | } | |
99 | ||
56303d34 SE |
100 | static inline struct batadv_orig_node * |
101 | batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data) | |
7aadf889 | 102 | { |
5bf74e9c | 103 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
7aadf889 | 104 | struct hlist_head *head; |
56303d34 | 105 | struct batadv_orig_node *orig_node, *orig_node_tmp = NULL; |
7aadf889 ML |
106 | int index; |
107 | ||
108 | if (!hash) | |
109 | return NULL; | |
110 | ||
da641193 | 111 | index = batadv_choose_orig(data, hash->size); |
7aadf889 ML |
112 | head = &hash->table[index]; |
113 | ||
114 | rcu_read_lock(); | |
b67bfe0d | 115 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
1eda58bf | 116 | if (!batadv_compare_eth(orig_node, data)) |
7aadf889 ML |
117 | continue; |
118 | ||
7b36e8ee ML |
119 | if (!atomic_inc_not_zero(&orig_node->refcount)) |
120 | continue; | |
121 | ||
7aadf889 | 122 | orig_node_tmp = orig_node; |
7aadf889 ML |
123 | break; |
124 | } | |
125 | rcu_read_unlock(); | |
126 | ||
127 | return orig_node_tmp; | |
128 | } | |
129 | ||
c6c8fea2 | 130 | #endif /* _NET_BATMAN_ADV_ORIGINATOR_H_ */ |