Commit | Line | Data |
---|---|---|
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); |
56303d34 | 44 | struct batadv_neigh_node * |
3f32f8a6 ML |
45 | batadv_neigh_node_new(struct batadv_orig_node *orig_node, |
46 | struct batadv_hard_iface *hard_iface, | |
47 | const u8 *neigh_addr); | |
56303d34 SE |
48 | void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node); |
49 | struct batadv_neigh_node * | |
7351a482 SW |
50 | batadv_orig_router_get(struct batadv_orig_node *orig_node, |
51 | const struct batadv_hard_iface *if_outgoing); | |
89652331 SW |
52 | struct batadv_neigh_ifinfo * |
53 | batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, | |
54 | struct batadv_hard_iface *if_outgoing); | |
55 | struct batadv_neigh_ifinfo * | |
56 | batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, | |
57 | struct batadv_hard_iface *if_outgoing); | |
58 | void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo); | |
7351a482 SW |
59 | |
60 | struct batadv_orig_ifinfo * | |
61 | batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, | |
62 | struct batadv_hard_iface *if_outgoing); | |
63 | struct batadv_orig_ifinfo * | |
64 | batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, | |
65 | struct batadv_hard_iface *if_outgoing); | |
66 | void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo); | |
67 | ||
7d211efc | 68 | int batadv_orig_seq_print_text(struct seq_file *seq, void *offset); |
cb1c92ec | 69 | int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset); |
56303d34 SE |
70 | int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, |
71 | int max_if_num); | |
72 | int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, | |
73 | int max_if_num); | |
7ea7b4a1 AQ |
74 | struct batadv_orig_node_vlan * |
75 | batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, | |
76 | unsigned short vid); | |
77 | struct batadv_orig_node_vlan * | |
78 | batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, | |
79 | unsigned short vid); | |
80 | void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan); | |
c6c8fea2 | 81 | |
9cfc7bd6 SE |
82 | /* hashfunction to choose an entry in a hash table of given size |
83 | * hash algorithm from http://en.wikipedia.org/wiki/Hash_table | |
84 | */ | |
6b5e971a | 85 | static inline u32 batadv_choose_orig(const void *data, u32 size) |
c6c8fea2 | 86 | { |
6b5e971a | 87 | u32 hash = 0; |
c6c8fea2 | 88 | |
36fd61cb | 89 | hash = jhash(data, ETH_ALEN, hash); |
c6c8fea2 SE |
90 | return hash % size; |
91 | } | |
92 | ||
56303d34 SE |
93 | static inline struct batadv_orig_node * |
94 | batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data) | |
7aadf889 | 95 | { |
5bf74e9c | 96 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
7aadf889 | 97 | struct hlist_head *head; |
56303d34 | 98 | struct batadv_orig_node *orig_node, *orig_node_tmp = NULL; |
7aadf889 ML |
99 | int index; |
100 | ||
101 | if (!hash) | |
102 | return NULL; | |
103 | ||
da641193 | 104 | index = batadv_choose_orig(data, hash->size); |
7aadf889 ML |
105 | head = &hash->table[index]; |
106 | ||
107 | rcu_read_lock(); | |
b67bfe0d | 108 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { |
1eda58bf | 109 | if (!batadv_compare_eth(orig_node, data)) |
7aadf889 ML |
110 | continue; |
111 | ||
7b36e8ee ML |
112 | if (!atomic_inc_not_zero(&orig_node->refcount)) |
113 | continue; | |
114 | ||
7aadf889 | 115 | orig_node_tmp = orig_node; |
7aadf889 ML |
116 | break; |
117 | } | |
118 | rcu_read_unlock(); | |
119 | ||
120 | return orig_node_tmp; | |
121 | } | |
122 | ||
c6c8fea2 | 123 | #endif /* _NET_BATMAN_ADV_ORIGINATOR_H_ */ |