Antonio Quartulli | 0b87393 | 2013-01-04 03:05:31 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 2 | * |
Antonio Quartulli | 35c133a | 2012-03-14 13:03:01 +0100 | [diff] [blame] | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 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 |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 18 | */ |
| 19 | |
| 20 | #include "main.h" |
| 21 | #include "translation-table.h" |
| 22 | #include "soft-interface.h" |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 23 | #include "hard-interface.h" |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 24 | #include "send.h" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 25 | #include "hash.h" |
| 26 | #include "originator.h" |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 27 | #include "routing.h" |
Simon Wunderlich | 20ff9d5 | 2012-01-22 20:00:23 +0100 | [diff] [blame] | 28 | #include "bridge_loop_avoidance.h" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 29 | |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 30 | #include <linux/crc32c.h> |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 31 | |
Antonio Quartulli | dec0507 | 2012-11-10 11:00:32 +0100 | [diff] [blame] | 32 | /* hash class keys */ |
| 33 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; |
| 34 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; |
| 35 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 36 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
| 37 | struct batadv_orig_node *orig_node); |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 38 | static void batadv_tt_purge(struct work_struct *work); |
| 39 | static void |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 40 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 41 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
| 42 | struct batadv_orig_node *orig_node, |
| 43 | const unsigned char *addr, |
| 44 | const char *message, bool roaming); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 45 | |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 46 | /* returns 1 if they are the same mac addr */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 47 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 48 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 49 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 50 | hash_entry); |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 51 | |
| 52 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); |
| 53 | } |
| 54 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 55 | static struct batadv_tt_common_entry * |
Sven Eckelmann | 5bf74e9 | 2012-06-05 22:31:28 +0200 | [diff] [blame] | 56 | batadv_tt_hash_find(struct batadv_hashtable *hash, const void *data) |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 57 | { |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 58 | struct hlist_head *head; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 59 | struct batadv_tt_common_entry *tt_common_entry; |
| 60 | struct batadv_tt_common_entry *tt_common_entry_tmp = NULL; |
Antonio Quartulli | c90681b | 2011-10-05 17:05:25 +0200 | [diff] [blame] | 61 | uint32_t index; |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 62 | |
| 63 | if (!hash) |
| 64 | return NULL; |
| 65 | |
Sven Eckelmann | da64119 | 2012-05-12 13:48:56 +0200 | [diff] [blame] | 66 | index = batadv_choose_orig(data, hash->size); |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 67 | head = &hash->table[index]; |
| 68 | |
| 69 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 70 | hlist_for_each_entry_rcu(tt_common_entry, head, hash_entry) { |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 71 | if (!batadv_compare_eth(tt_common_entry, data)) |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 72 | continue; |
| 73 | |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 74 | if (!atomic_inc_not_zero(&tt_common_entry->refcount)) |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 75 | continue; |
| 76 | |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 77 | tt_common_entry_tmp = tt_common_entry; |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 78 | break; |
| 79 | } |
| 80 | rcu_read_unlock(); |
| 81 | |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 82 | return tt_common_entry_tmp; |
| 83 | } |
| 84 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 85 | static struct batadv_tt_local_entry * |
| 86 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const void *data) |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 87 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 88 | struct batadv_tt_common_entry *tt_common_entry; |
| 89 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 90 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 91 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, data); |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 92 | if (tt_common_entry) |
| 93 | tt_local_entry = container_of(tt_common_entry, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 94 | struct batadv_tt_local_entry, |
| 95 | common); |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 96 | return tt_local_entry; |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 97 | } |
| 98 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 99 | static struct batadv_tt_global_entry * |
| 100 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const void *data) |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 101 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 102 | struct batadv_tt_common_entry *tt_common_entry; |
| 103 | struct batadv_tt_global_entry *tt_global_entry = NULL; |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 104 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 105 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, data); |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 106 | if (tt_common_entry) |
| 107 | tt_global_entry = container_of(tt_common_entry, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 108 | struct batadv_tt_global_entry, |
| 109 | common); |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 110 | return tt_global_entry; |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 111 | } |
| 112 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 113 | static void |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 114 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 115 | { |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 116 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
| 117 | kfree_rcu(tt_local_entry, common.rcu); |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 118 | } |
| 119 | |
Antonio Quartulli | 2102605 | 2013-05-07 00:29:22 +0200 | [diff] [blame^] | 120 | /** |
| 121 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a |
| 122 | * tt_global_entry and possibly free it |
| 123 | * @tt_global_entry: the object to free |
| 124 | */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 125 | static void |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 126 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 127 | { |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 128 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 129 | batadv_tt_global_del_orig_list(tt_global_entry); |
Antonio Quartulli | 2102605 | 2013-05-07 00:29:22 +0200 | [diff] [blame^] | 130 | kfree_rcu(tt_global_entry, common.rcu); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 131 | } |
| 132 | } |
| 133 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 134 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 135 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 136 | struct batadv_tt_orig_list_entry *orig_entry; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 137 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 138 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
Linus Lüssing | 7282222 | 2013-04-15 21:43:29 +0800 | [diff] [blame] | 139 | |
| 140 | /* We are in an rcu callback here, therefore we cannot use |
| 141 | * batadv_orig_node_free_ref() and its call_rcu(): |
| 142 | * An rcu_barrier() wouldn't wait for that to finish |
| 143 | */ |
| 144 | batadv_orig_node_free_ref_now(orig_entry->orig_node); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 145 | kfree(orig_entry); |
| 146 | } |
| 147 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 148 | static void |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 149 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 150 | { |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 151 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
| 152 | return; |
Antonio Quartulli | 29cb99d | 2012-06-25 20:49:51 +0000 | [diff] [blame] | 153 | /* to avoid race conditions, immediately decrease the tt counter */ |
| 154 | atomic_dec(&orig_entry->orig_node->tt_size); |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 155 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 156 | } |
| 157 | |
Antonio Quartulli | 3abe4ad | 2013-04-03 11:15:33 +0200 | [diff] [blame] | 158 | /** |
| 159 | * batadv_tt_local_event - store a local TT event (ADD/DEL) |
| 160 | * @bat_priv: the bat priv with all the soft interface information |
| 161 | * @tt_local_entry: the TT entry involved in the event |
| 162 | * @event_flags: flags to store in the event structure |
| 163 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 164 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
Antonio Quartulli | 3abe4ad | 2013-04-03 11:15:33 +0200 | [diff] [blame] | 165 | struct batadv_tt_local_entry *tt_local_entry, |
| 166 | uint8_t event_flags) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 167 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 168 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
Antonio Quartulli | 3abe4ad | 2013-04-03 11:15:33 +0200 | [diff] [blame] | 169 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
| 170 | uint8_t flags = common->flags | event_flags; |
Antonio Quartulli | 3b643de | 2012-05-25 00:00:42 +0200 | [diff] [blame] | 171 | bool event_removed = false; |
| 172 | bool del_op_requested, del_op_entry; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 173 | |
| 174 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 175 | if (!tt_change_node) |
| 176 | return; |
| 177 | |
Antonio Quartulli | ff66c97 | 2011-06-30 01:14:00 +0200 | [diff] [blame] | 178 | tt_change_node->change.flags = flags; |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 179 | tt_change_node->change.reserved = 0; |
Antonio Quartulli | 3abe4ad | 2013-04-03 11:15:33 +0200 | [diff] [blame] | 180 | memcpy(tt_change_node->change.addr, common->addr, ETH_ALEN); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 181 | |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 182 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
Antonio Quartulli | 3b643de | 2012-05-25 00:00:42 +0200 | [diff] [blame] | 183 | |
| 184 | /* check for ADD+DEL or DEL+ADD events */ |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 185 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
| 186 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
Antonio Quartulli | 3b643de | 2012-05-25 00:00:42 +0200 | [diff] [blame] | 187 | list) { |
Antonio Quartulli | 3abe4ad | 2013-04-03 11:15:33 +0200 | [diff] [blame] | 188 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
Antonio Quartulli | 3b643de | 2012-05-25 00:00:42 +0200 | [diff] [blame] | 189 | continue; |
| 190 | |
| 191 | /* DEL+ADD in the same orig interval have no effect and can be |
| 192 | * removed to avoid silly behaviour on the receiver side. The |
| 193 | * other way around (ADD+DEL) can happen in case of roaming of |
| 194 | * a client still in the NEW state. Roaming of NEW clients is |
| 195 | * now possible due to automatically recognition of "temporary" |
| 196 | * clients |
| 197 | */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 198 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
Antonio Quartulli | 3b643de | 2012-05-25 00:00:42 +0200 | [diff] [blame] | 199 | if (!del_op_requested && del_op_entry) |
| 200 | goto del; |
| 201 | if (del_op_requested && !del_op_entry) |
| 202 | goto del; |
| 203 | continue; |
| 204 | del: |
| 205 | list_del(&entry->list); |
| 206 | kfree(entry); |
Jesper Juhl | 155e4e1 | 2012-08-07 08:32:34 +0000 | [diff] [blame] | 207 | kfree(tt_change_node); |
Antonio Quartulli | 3b643de | 2012-05-25 00:00:42 +0200 | [diff] [blame] | 208 | event_removed = true; |
| 209 | goto unlock; |
| 210 | } |
| 211 | |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 212 | /* track the change in the OGMinterval list */ |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 213 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
Antonio Quartulli | 3b643de | 2012-05-25 00:00:42 +0200 | [diff] [blame] | 214 | |
| 215 | unlock: |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 216 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 217 | |
Antonio Quartulli | 3b643de | 2012-05-25 00:00:42 +0200 | [diff] [blame] | 218 | if (event_removed) |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 219 | atomic_dec(&bat_priv->tt.local_changes); |
Antonio Quartulli | 3b643de | 2012-05-25 00:00:42 +0200 | [diff] [blame] | 220 | else |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 221 | atomic_inc(&bat_priv->tt.local_changes); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 222 | } |
| 223 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 224 | /** |
| 225 | * batadv_tt_len - compute length in bytes of given number of tt changes |
| 226 | * @changes_num: number of tt changes |
| 227 | * |
| 228 | * Returns computed length in bytes. |
| 229 | */ |
| 230 | static int batadv_tt_len(int changes_num) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 231 | { |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 232 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 233 | } |
| 234 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 235 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 236 | { |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 237 | if (bat_priv->tt.local_hash) |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 238 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 239 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 240 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 241 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 242 | if (!bat_priv->tt.local_hash) |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 243 | return -ENOMEM; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 244 | |
Antonio Quartulli | dec0507 | 2012-11-10 11:00:32 +0100 | [diff] [blame] | 245 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
| 246 | &batadv_tt_local_hash_lock_class_key); |
| 247 | |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 248 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 249 | } |
| 250 | |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 251 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
| 252 | struct batadv_tt_global_entry *tt_global, |
| 253 | const char *message) |
| 254 | { |
| 255 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
| 256 | "Deleting global tt entry %pM: %s\n", |
| 257 | tt_global->common.addr, message); |
| 258 | |
| 259 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, |
| 260 | batadv_choose_orig, tt_global->common.addr); |
| 261 | batadv_tt_global_entry_free_ref(tt_global); |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 262 | } |
| 263 | |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 264 | void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
| 265 | int ifindex) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 266 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 267 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
Sven Eckelmann | 170173b | 2012-10-07 12:02:22 +0200 | [diff] [blame] | 268 | struct batadv_tt_local_entry *tt_local; |
| 269 | struct batadv_tt_global_entry *tt_global; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 270 | struct hlist_head *head; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 271 | struct batadv_tt_orig_list_entry *orig_entry; |
Simon Wunderlich | 80b3f58 | 2011-11-02 20:26:45 +0100 | [diff] [blame] | 272 | int hash_added; |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 273 | bool roamed_back = false; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 274 | |
Antonio Quartulli | 47c9465 | 2012-09-23 22:38:35 +0200 | [diff] [blame] | 275 | tt_local = batadv_tt_local_hash_find(bat_priv, addr); |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 276 | tt_global = batadv_tt_global_hash_find(bat_priv, addr); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 277 | |
Antonio Quartulli | 47c9465 | 2012-09-23 22:38:35 +0200 | [diff] [blame] | 278 | if (tt_local) { |
| 279 | tt_local->last_seen = jiffies; |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 280 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
| 281 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
| 282 | "Re-adding pending client %pM\n", addr); |
| 283 | /* whatever the reason why the PENDING flag was set, |
| 284 | * this is a client which was enqueued to be removed in |
| 285 | * this orig_interval. Since it popped up again, the |
| 286 | * flag can be reset like it was never enqueued |
| 287 | */ |
| 288 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; |
| 289 | goto add_event; |
| 290 | } |
| 291 | |
| 292 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { |
| 293 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
| 294 | "Roaming client %pM came back to its original location\n", |
| 295 | addr); |
| 296 | /* the ROAM flag is set because this client roamed away |
| 297 | * and the node got a roaming_advertisement message. Now |
| 298 | * that the client popped up again at its original |
| 299 | * location such flag can be unset |
| 300 | */ |
| 301 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; |
| 302 | roamed_back = true; |
| 303 | } |
| 304 | goto check_roaming; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 305 | } |
| 306 | |
Antonio Quartulli | 47c9465 | 2012-09-23 22:38:35 +0200 | [diff] [blame] | 307 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
| 308 | if (!tt_local) |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 309 | goto out; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 310 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 311 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 312 | "Creating new local tt entry: %pM (ttvn: %d)\n", addr, |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 313 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 314 | |
Antonio Quartulli | 47c9465 | 2012-09-23 22:38:35 +0200 | [diff] [blame] | 315 | memcpy(tt_local->common.addr, addr, ETH_ALEN); |
Antonio Quartulli | 8425ec6 | 2012-11-19 09:01:44 +0100 | [diff] [blame] | 316 | /* The local entry has to be marked as NEW to avoid to send it in |
| 317 | * a full table response going out before the next ttvn increment |
| 318 | * (consistency check) |
| 319 | */ |
| 320 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; |
Sven Eckelmann | 9563877 | 2012-05-12 02:09:31 +0200 | [diff] [blame] | 321 | if (batadv_is_wifi_iface(ifindex)) |
Antonio Quartulli | 47c9465 | 2012-09-23 22:38:35 +0200 | [diff] [blame] | 322 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
| 323 | atomic_set(&tt_local->common.refcount, 2); |
| 324 | tt_local->last_seen = jiffies; |
| 325 | tt_local->common.added_at = tt_local->last_seen; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 326 | |
| 327 | /* the batman interface mac address should never be purged */ |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 328 | if (batadv_compare_eth(addr, soft_iface->dev_addr)) |
Antonio Quartulli | 47c9465 | 2012-09-23 22:38:35 +0200 | [diff] [blame] | 329 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 330 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 331 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
Antonio Quartulli | 47c9465 | 2012-09-23 22:38:35 +0200 | [diff] [blame] | 332 | batadv_choose_orig, &tt_local->common, |
| 333 | &tt_local->common.hash_entry); |
Simon Wunderlich | 80b3f58 | 2011-11-02 20:26:45 +0100 | [diff] [blame] | 334 | |
| 335 | if (unlikely(hash_added != 0)) { |
| 336 | /* remove the reference for the hash */ |
Antonio Quartulli | 47c9465 | 2012-09-23 22:38:35 +0200 | [diff] [blame] | 337 | batadv_tt_local_entry_free_ref(tt_local); |
Simon Wunderlich | 80b3f58 | 2011-11-02 20:26:45 +0100 | [diff] [blame] | 338 | goto out; |
| 339 | } |
| 340 | |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 341 | add_event: |
Antonio Quartulli | 3abe4ad | 2013-04-03 11:15:33 +0200 | [diff] [blame] | 342 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
Antonio Quartulli | ff66c97 | 2011-06-30 01:14:00 +0200 | [diff] [blame] | 343 | |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 344 | check_roaming: |
| 345 | /* Check whether it is a roaming, but don't do anything if the roaming |
| 346 | * process has already been handled |
| 347 | */ |
| 348 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 349 | /* These node are probably going to update their tt table */ |
Antonio Quartulli | 47c9465 | 2012-09-23 22:38:35 +0200 | [diff] [blame] | 350 | head = &tt_global->orig_list; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 351 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 352 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
Antonio Quartulli | 47c9465 | 2012-09-23 22:38:35 +0200 | [diff] [blame] | 353 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 354 | orig_entry->orig_node); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 355 | } |
| 356 | rcu_read_unlock(); |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 357 | if (roamed_back) { |
| 358 | batadv_tt_global_free(bat_priv, tt_global, |
| 359 | "Roaming canceled"); |
| 360 | tt_global = NULL; |
| 361 | } else { |
| 362 | /* The global entry has to be marked as ROAMING and |
| 363 | * has to be kept for consistency purpose |
| 364 | */ |
| 365 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; |
| 366 | tt_global->roam_at = jiffies; |
| 367 | } |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 368 | } |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 369 | |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 370 | out: |
Antonio Quartulli | 47c9465 | 2012-09-23 22:38:35 +0200 | [diff] [blame] | 371 | if (tt_local) |
| 372 | batadv_tt_local_entry_free_ref(tt_local); |
| 373 | if (tt_global) |
| 374 | batadv_tt_global_entry_free_ref(tt_global); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 375 | } |
| 376 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 377 | /** |
| 378 | * batadv_tt_tvlv_container_update - update the translation table tvlv container |
| 379 | * after local tt changes have been committed |
| 380 | * @bat_priv: the bat priv with all the soft interface information |
| 381 | */ |
| 382 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 383 | { |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 384 | struct batadv_tt_change_node *entry, *safe; |
| 385 | struct batadv_tvlv_tt_data *tt_data; |
| 386 | struct batadv_tvlv_tt_change *tt_change; |
| 387 | int tt_diff_len = 0, tt_change_len = 0; |
| 388 | int tt_diff_entries_num = 0, tt_diff_entries_count = 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 389 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 390 | tt_diff_len += batadv_tt_len(atomic_read(&bat_priv->tt.local_changes)); |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 391 | |
| 392 | /* if we have too many changes for one packet don't send any |
| 393 | * and wait for the tt table request which will be fragmented |
| 394 | */ |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 395 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
| 396 | tt_diff_len = 0; |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 397 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 398 | tt_data = kzalloc(sizeof(*tt_data) + tt_diff_len, GFP_ATOMIC); |
| 399 | if (!tt_data) |
| 400 | return; |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 401 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 402 | tt_data->flags = BATADV_TT_OGM_DIFF; |
| 403 | tt_data->ttvn = atomic_read(&bat_priv->tt.vn); |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 404 | tt_data->crc = htonl(bat_priv->tt.local_crc); |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 405 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 406 | if (tt_diff_len == 0) |
| 407 | goto container_register; |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 408 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 409 | tt_diff_entries_num = tt_diff_len / batadv_tt_len(1); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 410 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 411 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
| 412 | atomic_set(&bat_priv->tt.local_changes, 0); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 413 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 414 | tt_change = (struct batadv_tvlv_tt_change *)(tt_data + 1); |
| 415 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 416 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
Sven Eckelmann | 7c64fd9 | 2012-02-28 10:55:36 +0100 | [diff] [blame] | 417 | list) { |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 418 | if (tt_diff_entries_count < tt_diff_entries_num) { |
| 419 | memcpy(tt_change + tt_diff_entries_count, |
| 420 | &entry->change, |
| 421 | sizeof(struct batadv_tvlv_tt_change)); |
| 422 | tt_diff_entries_count++; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 423 | } |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 424 | list_del(&entry->list); |
| 425 | kfree(entry); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 426 | } |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 427 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 428 | |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 429 | /* Keep the buffer for possible tt_request */ |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 430 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
| 431 | kfree(bat_priv->tt.last_changeset); |
| 432 | bat_priv->tt.last_changeset_len = 0; |
| 433 | bat_priv->tt.last_changeset = NULL; |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 434 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 435 | /* check whether this new OGM has no changes due to size problems */ |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 436 | if (tt_diff_entries_count > 0) { |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 437 | /* if kmalloc() fails we will reply with the full table |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 438 | * instead of providing the diff |
| 439 | */ |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 440 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 441 | if (bat_priv->tt.last_changeset) { |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 442 | memcpy(bat_priv->tt.last_changeset, |
| 443 | tt_change, tt_change_len); |
| 444 | bat_priv->tt.last_changeset_len = tt_diff_len; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 445 | } |
| 446 | } |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 447 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 448 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 449 | container_register: |
| 450 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, |
| 451 | sizeof(*tt_data) + tt_change_len); |
| 452 | kfree(tt_data); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 453 | } |
| 454 | |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 455 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 456 | { |
| 457 | struct net_device *net_dev = (struct net_device *)seq->private; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 458 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 459 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 460 | struct batadv_tt_common_entry *tt_common_entry; |
Antonio Quartulli | 85766a8 | 2012-11-08 22:16:16 +0100 | [diff] [blame] | 461 | struct batadv_tt_local_entry *tt_local; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 462 | struct batadv_hard_iface *primary_if; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 463 | struct hlist_head *head; |
Antonio Quartulli | c90681b | 2011-10-05 17:05:25 +0200 | [diff] [blame] | 464 | uint32_t i; |
Antonio Quartulli | 85766a8 | 2012-11-08 22:16:16 +0100 | [diff] [blame] | 465 | int last_seen_secs; |
| 466 | int last_seen_msecs; |
| 467 | unsigned long last_seen_jiffies; |
| 468 | bool no_purge; |
| 469 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 470 | |
Marek Lindner | 30da63a | 2012-08-03 17:15:46 +0200 | [diff] [blame] | 471 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
| 472 | if (!primary_if) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 473 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 474 | |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 475 | seq_printf(seq, |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 476 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u CRC: %#.8x):\n", |
Antonio Quartulli | f9d8a53 | 2012-11-19 09:01:42 +0100 | [diff] [blame] | 477 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn), |
| 478 | bat_priv->tt.local_crc); |
Antonio Quartulli | 85766a8 | 2012-11-08 22:16:16 +0100 | [diff] [blame] | 479 | seq_printf(seq, " %-13s %-7s %-10s\n", "Client", "Flags", |
| 480 | "Last seen"); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 481 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 482 | for (i = 0; i < hash->size; i++) { |
| 483 | head = &hash->table[i]; |
| 484 | |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 485 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 486 | hlist_for_each_entry_rcu(tt_common_entry, |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 487 | head, hash_entry) { |
Antonio Quartulli | 85766a8 | 2012-11-08 22:16:16 +0100 | [diff] [blame] | 488 | tt_local = container_of(tt_common_entry, |
| 489 | struct batadv_tt_local_entry, |
| 490 | common); |
| 491 | last_seen_jiffies = jiffies - tt_local->last_seen; |
| 492 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); |
| 493 | last_seen_secs = last_seen_msecs / 1000; |
| 494 | last_seen_msecs = last_seen_msecs % 1000; |
| 495 | |
| 496 | no_purge = tt_common_entry->flags & np_flag; |
| 497 | |
| 498 | seq_printf(seq, " * %pM [%c%c%c%c%c] %3u.%03u\n", |
Sven Eckelmann | 7c64fd9 | 2012-02-28 10:55:36 +0100 | [diff] [blame] | 499 | tt_common_entry->addr, |
| 500 | (tt_common_entry->flags & |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 501 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
Antonio Quartulli | 85766a8 | 2012-11-08 22:16:16 +0100 | [diff] [blame] | 502 | no_purge ? 'P' : '.', |
Sven Eckelmann | 7c64fd9 | 2012-02-28 10:55:36 +0100 | [diff] [blame] | 503 | (tt_common_entry->flags & |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 504 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
Sven Eckelmann | 7c64fd9 | 2012-02-28 10:55:36 +0100 | [diff] [blame] | 505 | (tt_common_entry->flags & |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 506 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
Sven Eckelmann | 7c64fd9 | 2012-02-28 10:55:36 +0100 | [diff] [blame] | 507 | (tt_common_entry->flags & |
Antonio Quartulli | 85766a8 | 2012-11-08 22:16:16 +0100 | [diff] [blame] | 508 | BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
Antonio Quartulli | a7966d9 | 2013-01-24 11:41:39 +0100 | [diff] [blame] | 509 | no_purge ? 0 : last_seen_secs, |
| 510 | no_purge ? 0 : last_seen_msecs); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 511 | } |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 512 | rcu_read_unlock(); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 513 | } |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 514 | out: |
| 515 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 516 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | 30da63a | 2012-08-03 17:15:46 +0200 | [diff] [blame] | 517 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 518 | } |
| 519 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 520 | static void |
| 521 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, |
| 522 | struct batadv_tt_local_entry *tt_local_entry, |
| 523 | uint16_t flags, const char *message) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 524 | { |
Antonio Quartulli | 3abe4ad | 2013-04-03 11:15:33 +0200 | [diff] [blame] | 525 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 526 | |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 527 | /* The local client has to be marked as "pending to be removed" but has |
| 528 | * to be kept in the table in order to send it in a full table |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 529 | * response issued before the net ttvn increment (consistency check) |
| 530 | */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 531 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
Antonio Quartulli | c566dbb | 2012-01-06 21:31:34 +0100 | [diff] [blame] | 532 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 533 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 534 | "Local tt entry (%pM) pending to be removed: %s\n", |
| 535 | tt_local_entry->common.addr, message); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 536 | } |
| 537 | |
Antonio Quartulli | 7f91d06 | 2012-08-27 11:44:43 +0200 | [diff] [blame] | 538 | /** |
| 539 | * batadv_tt_local_remove - logically remove an entry from the local table |
| 540 | * @bat_priv: the bat priv with all the soft interface information |
| 541 | * @addr: the MAC address of the client to remove |
| 542 | * @message: message to append to the log on deletion |
| 543 | * @roaming: true if the deletion is due to a roaming event |
| 544 | * |
| 545 | * Returns the flags assigned to the local entry before being deleted |
| 546 | */ |
| 547 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, |
| 548 | const uint8_t *addr, const char *message, |
| 549 | bool roaming) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 550 | { |
Sven Eckelmann | 170173b | 2012-10-07 12:02:22 +0200 | [diff] [blame] | 551 | struct batadv_tt_local_entry *tt_local_entry; |
Antonio Quartulli | 7f91d06 | 2012-08-27 11:44:43 +0200 | [diff] [blame] | 552 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 553 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 554 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 555 | if (!tt_local_entry) |
| 556 | goto out; |
| 557 | |
Antonio Quartulli | 7f91d06 | 2012-08-27 11:44:43 +0200 | [diff] [blame] | 558 | curr_flags = tt_local_entry->common.flags; |
| 559 | |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 560 | flags = BATADV_TT_CLIENT_DEL; |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 561 | /* if this global entry addition is due to a roaming, the node has to |
| 562 | * mark the local entry as "roamed" in order to correctly reroute |
| 563 | * packets later |
| 564 | */ |
Antonio Quartulli | 7c1fd91 | 2012-09-23 22:38:34 +0200 | [diff] [blame] | 565 | if (roaming) { |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 566 | flags |= BATADV_TT_CLIENT_ROAM; |
Antonio Quartulli | 7c1fd91 | 2012-09-23 22:38:34 +0200 | [diff] [blame] | 567 | /* mark the local client as ROAMed */ |
| 568 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
| 569 | } |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 570 | |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 571 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
| 572 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, |
| 573 | message); |
| 574 | goto out; |
| 575 | } |
| 576 | /* if this client has been added right now, it is possible to |
| 577 | * immediately purge it |
| 578 | */ |
Antonio Quartulli | 3abe4ad | 2013-04-03 11:15:33 +0200 | [diff] [blame] | 579 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 580 | hlist_del_rcu(&tt_local_entry->common.hash_entry); |
| 581 | batadv_tt_local_entry_free_ref(tt_local_entry); |
Antonio Quartulli | 7f91d06 | 2012-08-27 11:44:43 +0200 | [diff] [blame] | 582 | |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 583 | out: |
| 584 | if (tt_local_entry) |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 585 | batadv_tt_local_entry_free_ref(tt_local_entry); |
Antonio Quartulli | 7f91d06 | 2012-08-27 11:44:43 +0200 | [diff] [blame] | 586 | |
| 587 | return curr_flags; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 588 | } |
| 589 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 590 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 591 | struct hlist_head *head) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 592 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 593 | struct batadv_tt_local_entry *tt_local_entry; |
| 594 | struct batadv_tt_common_entry *tt_common_entry; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 595 | struct hlist_node *node_tmp; |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 596 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 597 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 598 | hash_entry) { |
| 599 | tt_local_entry = container_of(tt_common_entry, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 600 | struct batadv_tt_local_entry, |
| 601 | common); |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 602 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
| 603 | continue; |
| 604 | |
| 605 | /* entry already marked for deletion */ |
| 606 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) |
| 607 | continue; |
| 608 | |
| 609 | if (!batadv_has_timed_out(tt_local_entry->last_seen, |
| 610 | BATADV_TT_LOCAL_TIMEOUT)) |
| 611 | continue; |
| 612 | |
| 613 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, |
| 614 | BATADV_TT_CLIENT_DEL, "timed out"); |
| 615 | } |
| 616 | } |
| 617 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 618 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv) |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 619 | { |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 620 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 621 | struct hlist_head *head; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 622 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
Antonio Quartulli | c90681b | 2011-10-05 17:05:25 +0200 | [diff] [blame] | 623 | uint32_t i; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 624 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 625 | for (i = 0; i < hash->size; i++) { |
| 626 | head = &hash->table[i]; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 627 | list_lock = &hash->list_locks[i]; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 628 | |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 629 | spin_lock_bh(list_lock); |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 630 | batadv_tt_local_purge_list(bat_priv, head); |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 631 | spin_unlock_bh(list_lock); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 632 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 633 | } |
| 634 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 635 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 636 | { |
Sven Eckelmann | 5bf74e9 | 2012-06-05 22:31:28 +0200 | [diff] [blame] | 637 | struct batadv_hashtable *hash; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 638 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 639 | struct batadv_tt_common_entry *tt_common_entry; |
| 640 | struct batadv_tt_local_entry *tt_local; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 641 | struct hlist_node *node_tmp; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 642 | struct hlist_head *head; |
Antonio Quartulli | c90681b | 2011-10-05 17:05:25 +0200 | [diff] [blame] | 643 | uint32_t i; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 644 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 645 | if (!bat_priv->tt.local_hash) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 646 | return; |
| 647 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 648 | hash = bat_priv->tt.local_hash; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 649 | |
| 650 | for (i = 0; i < hash->size; i++) { |
| 651 | head = &hash->table[i]; |
| 652 | list_lock = &hash->list_locks[i]; |
| 653 | |
| 654 | spin_lock_bh(list_lock); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 655 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 656 | head, hash_entry) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 657 | hlist_del_rcu(&tt_common_entry->hash_entry); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 658 | tt_local = container_of(tt_common_entry, |
| 659 | struct batadv_tt_local_entry, |
| 660 | common); |
| 661 | batadv_tt_local_entry_free_ref(tt_local); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 662 | } |
| 663 | spin_unlock_bh(list_lock); |
| 664 | } |
| 665 | |
Sven Eckelmann | 1a8eaf0 | 2012-05-12 02:09:32 +0200 | [diff] [blame] | 666 | batadv_hash_destroy(hash); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 667 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 668 | bat_priv->tt.local_hash = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 669 | } |
| 670 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 671 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 672 | { |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 673 | if (bat_priv->tt.global_hash) |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 674 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 675 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 676 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 677 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 678 | if (!bat_priv->tt.global_hash) |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 679 | return -ENOMEM; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 680 | |
Antonio Quartulli | dec0507 | 2012-11-10 11:00:32 +0100 | [diff] [blame] | 681 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
| 682 | &batadv_tt_global_hash_lock_class_key); |
| 683 | |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 684 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 685 | } |
| 686 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 687 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 688 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 689 | struct batadv_tt_change_node *entry, *safe; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 690 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 691 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 692 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 693 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 694 | list) { |
| 695 | list_del(&entry->list); |
| 696 | kfree(entry); |
| 697 | } |
| 698 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 699 | atomic_set(&bat_priv->tt.local_changes, 0); |
| 700 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 701 | } |
| 702 | |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 703 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
| 704 | * batadv_tt_global_entry list |
| 705 | * |
| 706 | * returns it with an increased refcounter, NULL if not found |
| 707 | */ |
| 708 | static struct batadv_tt_orig_list_entry * |
| 709 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, |
| 710 | const struct batadv_orig_node *orig_node) |
| 711 | { |
| 712 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
| 713 | const struct hlist_head *head; |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 714 | |
| 715 | rcu_read_lock(); |
| 716 | head = &entry->orig_list; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 717 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 718 | if (tmp_orig_entry->orig_node != orig_node) |
| 719 | continue; |
| 720 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) |
| 721 | continue; |
| 722 | |
| 723 | orig_entry = tmp_orig_entry; |
| 724 | break; |
| 725 | } |
| 726 | rcu_read_unlock(); |
| 727 | |
| 728 | return orig_entry; |
| 729 | } |
| 730 | |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 731 | /* find out if an orig_node is already in the list of a tt_global_entry. |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 732 | * returns true if found, false otherwise |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 733 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 734 | static bool |
| 735 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, |
| 736 | const struct batadv_orig_node *orig_node) |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 737 | { |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 738 | struct batadv_tt_orig_list_entry *orig_entry; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 739 | bool found = false; |
| 740 | |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 741 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); |
| 742 | if (orig_entry) { |
| 743 | found = true; |
| 744 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 745 | } |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 746 | |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 747 | return found; |
| 748 | } |
| 749 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 750 | static void |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 751 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 752 | struct batadv_orig_node *orig_node, int ttvn) |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 753 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 754 | struct batadv_tt_orig_list_entry *orig_entry; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 755 | |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 756 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 757 | if (orig_entry) { |
| 758 | /* refresh the ttvn: the current value could be a bogus one that |
| 759 | * was added during a "temporary client detection" |
| 760 | */ |
| 761 | orig_entry->ttvn = ttvn; |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 762 | goto out; |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 763 | } |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 764 | |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 765 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
| 766 | if (!orig_entry) |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 767 | goto out; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 768 | |
| 769 | INIT_HLIST_NODE(&orig_entry->list); |
| 770 | atomic_inc(&orig_node->refcount); |
| 771 | atomic_inc(&orig_node->tt_size); |
| 772 | orig_entry->orig_node = orig_node; |
| 773 | orig_entry->ttvn = ttvn; |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 774 | atomic_set(&orig_entry->refcount, 2); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 775 | |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 776 | spin_lock_bh(&tt_global->list_lock); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 777 | hlist_add_head_rcu(&orig_entry->list, |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 778 | &tt_global->orig_list); |
| 779 | spin_unlock_bh(&tt_global->list_lock); |
| 780 | out: |
| 781 | if (orig_entry) |
| 782 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 783 | } |
| 784 | |
Antonio Quartulli | d4ff40f | 2013-04-18 15:13:01 +0200 | [diff] [blame] | 785 | /** |
| 786 | * batadv_tt_global_add - add a new TT global entry or update an existing one |
| 787 | * @bat_priv: the bat priv with all the soft interface information |
| 788 | * @orig_node: the originator announcing the client |
| 789 | * @tt_addr: the mac address of the non-mesh client |
| 790 | * @flags: TT flags that have to be set for this non-mesh client |
| 791 | * @ttvn: the tt version number ever announcing this non-mesh client |
| 792 | * |
| 793 | * Add a new TT global entry for the given originator. If the entry already |
| 794 | * exists add a new reference to the given originator (a global entry can have |
| 795 | * references to multiple originators) and adjust the flags attribute to reflect |
| 796 | * the function argument. |
| 797 | * If a TT local entry exists for this non-mesh client remove it. |
| 798 | * |
| 799 | * The caller must hold orig_node refcount. |
Antonio Quartulli | 1e5d49f | 2013-05-05 19:32:38 +0200 | [diff] [blame] | 800 | * |
| 801 | * Return true if the new entry has been added, false otherwise |
Antonio Quartulli | d4ff40f | 2013-04-18 15:13:01 +0200 | [diff] [blame] | 802 | */ |
Antonio Quartulli | 1e5d49f | 2013-05-05 19:32:38 +0200 | [diff] [blame] | 803 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
| 804 | struct batadv_orig_node *orig_node, |
| 805 | const unsigned char *tt_addr, uint16_t flags, |
| 806 | uint8_t ttvn) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 807 | { |
Sven Eckelmann | 170173b | 2012-10-07 12:02:22 +0200 | [diff] [blame] | 808 | struct batadv_tt_global_entry *tt_global_entry; |
| 809 | struct batadv_tt_local_entry *tt_local_entry; |
Antonio Quartulli | 1e5d49f | 2013-05-05 19:32:38 +0200 | [diff] [blame] | 810 | bool ret = false; |
Simon Wunderlich | 80b3f58 | 2011-11-02 20:26:45 +0100 | [diff] [blame] | 811 | int hash_added; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 812 | struct batadv_tt_common_entry *common; |
Antonio Quartulli | 7f91d06 | 2012-08-27 11:44:43 +0200 | [diff] [blame] | 813 | uint16_t local_flags; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 814 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 815 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr); |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 816 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr); |
| 817 | |
| 818 | /* if the node already has a local client for this entry, it has to wait |
| 819 | * for a roaming advertisement instead of manually messing up the global |
| 820 | * table |
| 821 | */ |
| 822 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && |
| 823 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) |
| 824 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 825 | |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 826 | if (!tt_global_entry) { |
Antonio Quartulli | d4f4469 | 2012-05-25 00:00:54 +0200 | [diff] [blame] | 827 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 828 | if (!tt_global_entry) |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 829 | goto out; |
| 830 | |
Sven Eckelmann | c0a5592 | 2012-05-12 13:48:55 +0200 | [diff] [blame] | 831 | common = &tt_global_entry->common; |
| 832 | memcpy(common->addr, tt_addr, ETH_ALEN); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 833 | |
Antonio Quartulli | d4f4469 | 2012-05-25 00:00:54 +0200 | [diff] [blame] | 834 | common->flags = flags; |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 835 | tt_global_entry->roam_at = 0; |
Antonio Quartulli | fdf7932 | 2012-08-24 17:54:07 +0200 | [diff] [blame] | 836 | /* node must store current time in case of roaming. This is |
| 837 | * needed to purge this entry out on timeout (if nobody claims |
| 838 | * it) |
| 839 | */ |
| 840 | if (flags & BATADV_TT_CLIENT_ROAM) |
| 841 | tt_global_entry->roam_at = jiffies; |
Sven Eckelmann | c0a5592 | 2012-05-12 13:48:55 +0200 | [diff] [blame] | 842 | atomic_set(&common->refcount, 2); |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 843 | common->added_at = jiffies; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 844 | |
| 845 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); |
| 846 | spin_lock_init(&tt_global_entry->list_lock); |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 847 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 848 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 849 | batadv_compare_tt, |
| 850 | batadv_choose_orig, common, |
| 851 | &common->hash_entry); |
Simon Wunderlich | 80b3f58 | 2011-11-02 20:26:45 +0100 | [diff] [blame] | 852 | |
| 853 | if (unlikely(hash_added != 0)) { |
| 854 | /* remove the reference for the hash */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 855 | batadv_tt_global_entry_free_ref(tt_global_entry); |
Simon Wunderlich | 80b3f58 | 2011-11-02 20:26:45 +0100 | [diff] [blame] | 856 | goto out_remove; |
| 857 | } |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 858 | } else { |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 859 | common = &tt_global_entry->common; |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 860 | /* If there is already a global entry, we can use this one for |
| 861 | * our processing. |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 862 | * But if we are trying to add a temporary client then here are |
| 863 | * two options at this point: |
| 864 | * 1) the global client is not a temporary client: the global |
| 865 | * client has to be left as it is, temporary information |
| 866 | * should never override any already known client state |
| 867 | * 2) the global client is a temporary client: purge the |
| 868 | * originator list and add the new one orig_entry |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 869 | */ |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 870 | if (flags & BATADV_TT_CLIENT_TEMP) { |
| 871 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) |
| 872 | goto out; |
| 873 | if (batadv_tt_global_entry_has_orig(tt_global_entry, |
| 874 | orig_node)) |
| 875 | goto out_remove; |
| 876 | batadv_tt_global_del_orig_list(tt_global_entry); |
| 877 | goto add_orig_entry; |
| 878 | } |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 879 | |
| 880 | /* if the client was temporary added before receiving the first |
| 881 | * OGM announcing it, we have to clear the TEMP flag |
| 882 | */ |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 883 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 884 | |
Antonio Quartulli | e9c00136 | 2012-11-07 15:05:33 +0100 | [diff] [blame] | 885 | /* the change can carry possible "attribute" flags like the |
| 886 | * TT_CLIENT_WIFI, therefore they have to be copied in the |
| 887 | * client entry |
| 888 | */ |
| 889 | tt_global_entry->common.flags |= flags; |
| 890 | |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 891 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
| 892 | * one originator left in the list and we previously received a |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 893 | * delete + roaming change for this originator. |
| 894 | * |
| 895 | * We should first delete the old originator before adding the |
| 896 | * new one. |
| 897 | */ |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 898 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 899 | batadv_tt_global_del_orig_list(tt_global_entry); |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 900 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 901 | tt_global_entry->roam_at = 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 902 | } |
| 903 | } |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 904 | add_orig_entry: |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 905 | /* add the new orig_entry (if needed) or update it */ |
Antonio Quartulli | d657e62 | 2012-07-01 14:09:12 +0200 | [diff] [blame] | 906 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 907 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 908 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 909 | "Creating new global tt entry: %pM (via %pM)\n", |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 910 | common->addr, orig_node->orig); |
Antonio Quartulli | 1e5d49f | 2013-05-05 19:32:38 +0200 | [diff] [blame] | 911 | ret = true; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 912 | |
Simon Wunderlich | 80b3f58 | 2011-11-02 20:26:45 +0100 | [diff] [blame] | 913 | out_remove: |
Antonio Quartulli | 7f91d06 | 2012-08-27 11:44:43 +0200 | [diff] [blame] | 914 | |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 915 | /* remove address from local hash if present */ |
Antonio Quartulli | 7f91d06 | 2012-08-27 11:44:43 +0200 | [diff] [blame] | 916 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, |
| 917 | "global tt received", |
Antonio Quartulli | c1d0743 | 2013-01-15 22:17:19 +1000 | [diff] [blame] | 918 | flags & BATADV_TT_CLIENT_ROAM); |
Antonio Quartulli | 7f91d06 | 2012-08-27 11:44:43 +0200 | [diff] [blame] | 919 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
| 920 | |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 921 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
| 922 | /* this is a normal global add. Therefore the client is not in a |
| 923 | * roaming state anymore. |
| 924 | */ |
| 925 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; |
| 926 | |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 927 | out: |
| 928 | if (tt_global_entry) |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 929 | batadv_tt_global_entry_free_ref(tt_global_entry); |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 930 | if (tt_local_entry) |
| 931 | batadv_tt_local_entry_free_ref(tt_local_entry); |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 932 | return ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 933 | } |
| 934 | |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 935 | /* batadv_transtable_best_orig - Get best originator list entry from tt entry |
| 936 | * @tt_global_entry: global translation table entry to be analyzed |
| 937 | * |
| 938 | * This functon assumes the caller holds rcu_read_lock(). |
| 939 | * Returns best originator list entry or NULL on errors. |
| 940 | */ |
| 941 | static struct batadv_tt_orig_list_entry * |
| 942 | batadv_transtable_best_orig(struct batadv_tt_global_entry *tt_global_entry) |
| 943 | { |
| 944 | struct batadv_neigh_node *router = NULL; |
| 945 | struct hlist_head *head; |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 946 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
| 947 | int best_tq = 0; |
| 948 | |
| 949 | head = &tt_global_entry->orig_list; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 950 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 951 | router = batadv_orig_node_get_router(orig_entry->orig_node); |
| 952 | if (!router) |
| 953 | continue; |
| 954 | |
| 955 | if (router->tq_avg > best_tq) { |
| 956 | best_entry = orig_entry; |
| 957 | best_tq = router->tq_avg; |
| 958 | } |
| 959 | |
| 960 | batadv_neigh_node_free_ref(router); |
| 961 | } |
| 962 | |
| 963 | return best_entry; |
| 964 | } |
| 965 | |
| 966 | /* batadv_tt_global_print_entry - print all orig nodes who announce the address |
| 967 | * for this global entry |
| 968 | * @tt_global_entry: global translation table entry to be printed |
| 969 | * @seq: debugfs table seq_file struct |
| 970 | * |
| 971 | * This functon assumes the caller holds rcu_read_lock(). |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 972 | */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 973 | static void |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 974 | batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 975 | struct seq_file *seq) |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 976 | { |
| 977 | struct hlist_head *head; |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 978 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 979 | struct batadv_tt_common_entry *tt_common_entry; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 980 | uint16_t flags; |
| 981 | uint8_t last_ttvn; |
| 982 | |
| 983 | tt_common_entry = &tt_global_entry->common; |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 984 | flags = tt_common_entry->flags; |
| 985 | |
| 986 | best_entry = batadv_transtable_best_orig(tt_global_entry); |
| 987 | if (best_entry) { |
| 988 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
Antonio Quartulli | f9d8a53 | 2012-11-19 09:01:42 +0100 | [diff] [blame] | 989 | seq_printf(seq, |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 990 | " %c %pM (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 991 | '*', tt_global_entry->common.addr, |
| 992 | best_entry->ttvn, best_entry->orig_node->orig, |
Antonio Quartulli | f9d8a53 | 2012-11-19 09:01:42 +0100 | [diff] [blame] | 993 | last_ttvn, best_entry->orig_node->tt_crc, |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 994 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
| 995 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
| 996 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
| 997 | } |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 998 | |
| 999 | head = &tt_global_entry->orig_list; |
| 1000 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1001 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 1002 | if (best_entry == orig_entry) |
| 1003 | continue; |
| 1004 | |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1005 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 1006 | seq_printf(seq, " %c %pM (%3u) via %pM (%3u) [%c%c%c]\n", |
| 1007 | '+', tt_global_entry->common.addr, |
| 1008 | orig_entry->ttvn, orig_entry->orig_node->orig, |
| 1009 | last_ttvn, |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1010 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 1011 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
| 1012 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1013 | } |
| 1014 | } |
| 1015 | |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 1016 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1017 | { |
| 1018 | struct net_device *net_dev = (struct net_device *)seq->private; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1019 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1020 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1021 | struct batadv_tt_common_entry *tt_common_entry; |
| 1022 | struct batadv_tt_global_entry *tt_global; |
| 1023 | struct batadv_hard_iface *primary_if; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1024 | struct hlist_head *head; |
Antonio Quartulli | c90681b | 2011-10-05 17:05:25 +0200 | [diff] [blame] | 1025 | uint32_t i; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1026 | |
Marek Lindner | 30da63a | 2012-08-03 17:15:46 +0200 | [diff] [blame] | 1027 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
| 1028 | if (!primary_if) |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 1029 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1030 | |
Antonio Quartulli | 2dafb49 | 2011-05-05 08:42:45 +0200 | [diff] [blame] | 1031 | seq_printf(seq, |
| 1032 | "Globally announced TT entries received via the mesh %s\n", |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1033 | net_dev->name); |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1034 | seq_printf(seq, " %-13s %s %-15s %s (%-10s) %s\n", |
Antonio Quartulli | f9d8a53 | 2012-11-19 09:01:42 +0100 | [diff] [blame] | 1035 | "Client", "(TTVN)", "Originator", "(Curr TTVN)", "CRC", |
| 1036 | "Flags"); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1037 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1038 | for (i = 0; i < hash->size; i++) { |
| 1039 | head = &hash->table[i]; |
| 1040 | |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 1041 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1042 | hlist_for_each_entry_rcu(tt_common_entry, |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 1043 | head, hash_entry) { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1044 | tt_global = container_of(tt_common_entry, |
| 1045 | struct batadv_tt_global_entry, |
| 1046 | common); |
| 1047 | batadv_tt_global_print_entry(tt_global, seq); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1048 | } |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 1049 | rcu_read_unlock(); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1050 | } |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 1051 | out: |
| 1052 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 1053 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | 30da63a | 2012-08-03 17:15:46 +0200 | [diff] [blame] | 1054 | return 0; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1055 | } |
| 1056 | |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1057 | /* deletes the orig list of a tt_global_entry */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1058 | static void |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1059 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1060 | { |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1061 | struct hlist_head *head; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1062 | struct hlist_node *safe; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1063 | struct batadv_tt_orig_list_entry *orig_entry; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1064 | |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1065 | spin_lock_bh(&tt_global_entry->list_lock); |
| 1066 | head = &tt_global_entry->orig_list; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1067 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
| 1068 | hlist_del_rcu(&orig_entry->list); |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1069 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1070 | } |
| 1071 | spin_unlock_bh(&tt_global_entry->list_lock); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1072 | } |
| 1073 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1074 | static void |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1075 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
| 1076 | struct batadv_tt_global_entry *tt_global_entry, |
| 1077 | struct batadv_orig_node *orig_node, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1078 | const char *message) |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1079 | { |
| 1080 | struct hlist_head *head; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1081 | struct hlist_node *safe; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1082 | struct batadv_tt_orig_list_entry *orig_entry; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1083 | |
| 1084 | spin_lock_bh(&tt_global_entry->list_lock); |
| 1085 | head = &tt_global_entry->orig_list; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1086 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1087 | if (orig_entry->orig_node == orig_node) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1088 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1089 | "Deleting %pM from global tt entry %pM: %s\n", |
| 1090 | orig_node->orig, |
| 1091 | tt_global_entry->common.addr, message); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1092 | hlist_del_rcu(&orig_entry->list); |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1093 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1094 | } |
| 1095 | } |
| 1096 | spin_unlock_bh(&tt_global_entry->list_lock); |
| 1097 | } |
| 1098 | |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1099 | /* If the client is to be deleted, we check if it is the last origantor entry |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1100 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
| 1101 | * timer, otherwise we simply remove the originator scheduled for deletion. |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1102 | */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1103 | static void |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1104 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
| 1105 | struct batadv_tt_global_entry *tt_global_entry, |
| 1106 | struct batadv_orig_node *orig_node, |
| 1107 | const char *message) |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1108 | { |
| 1109 | bool last_entry = true; |
| 1110 | struct hlist_head *head; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1111 | struct batadv_tt_orig_list_entry *orig_entry; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1112 | |
| 1113 | /* no local entry exists, case 1: |
| 1114 | * Check if this is the last one or if other entries exist. |
| 1115 | */ |
| 1116 | |
| 1117 | rcu_read_lock(); |
| 1118 | head = &tt_global_entry->orig_list; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1119 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1120 | if (orig_entry->orig_node != orig_node) { |
| 1121 | last_entry = false; |
| 1122 | break; |
| 1123 | } |
| 1124 | } |
| 1125 | rcu_read_unlock(); |
| 1126 | |
| 1127 | if (last_entry) { |
| 1128 | /* its the last one, mark for roaming. */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1129 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1130 | tt_global_entry->roam_at = jiffies; |
| 1131 | } else |
| 1132 | /* there is another entry, we can simply delete this |
| 1133 | * one and can still use the other one. |
| 1134 | */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1135 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
| 1136 | orig_node, message); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1137 | } |
| 1138 | |
| 1139 | |
| 1140 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1141 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
| 1142 | struct batadv_orig_node *orig_node, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1143 | const unsigned char *addr, |
| 1144 | const char *message, bool roaming) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1145 | { |
Sven Eckelmann | 170173b | 2012-10-07 12:02:22 +0200 | [diff] [blame] | 1146 | struct batadv_tt_global_entry *tt_global_entry; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1147 | struct batadv_tt_local_entry *local_entry = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1148 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1149 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1150 | if (!tt_global_entry) |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1151 | goto out; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1152 | |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1153 | if (!roaming) { |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1154 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
| 1155 | orig_node, message); |
Sven Eckelmann | 92f90f5 | 2011-12-22 20:31:12 +0800 | [diff] [blame] | 1156 | |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1157 | if (hlist_empty(&tt_global_entry->orig_list)) |
Antonio Quartulli | be73b48 | 2012-09-23 22:38:36 +0200 | [diff] [blame] | 1158 | batadv_tt_global_free(bat_priv, tt_global_entry, |
| 1159 | message); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1160 | |
Sven Eckelmann | 92f90f5 | 2011-12-22 20:31:12 +0800 | [diff] [blame] | 1161 | goto out; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1162 | } |
Sven Eckelmann | 92f90f5 | 2011-12-22 20:31:12 +0800 | [diff] [blame] | 1163 | |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1164 | /* if we are deleting a global entry due to a roam |
| 1165 | * event, there are two possibilities: |
| 1166 | * 1) the client roamed from node A to node B => if there |
| 1167 | * is only one originator left for this client, we mark |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1168 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1169 | * wait for node B to claim it. In case of timeout |
| 1170 | * the entry is purged. |
| 1171 | * |
| 1172 | * If there are other originators left, we directly delete |
| 1173 | * the originator. |
| 1174 | * 2) the client roamed to us => we can directly delete |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1175 | * the global entry, since it is useless now. |
| 1176 | */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1177 | local_entry = batadv_tt_local_hash_find(bat_priv, |
| 1178 | tt_global_entry->common.addr); |
| 1179 | if (local_entry) { |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1180 | /* local entry exists, case 2: client roamed to us. */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1181 | batadv_tt_global_del_orig_list(tt_global_entry); |
Antonio Quartulli | be73b48 | 2012-09-23 22:38:36 +0200 | [diff] [blame] | 1182 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1183 | } else |
| 1184 | /* no local entry exists, case 1: check for roaming */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1185 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
| 1186 | orig_node, message); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1187 | |
Sven Eckelmann | 92f90f5 | 2011-12-22 20:31:12 +0800 | [diff] [blame] | 1188 | |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 1189 | out: |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1190 | if (tt_global_entry) |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1191 | batadv_tt_global_entry_free_ref(tt_global_entry); |
| 1192 | if (local_entry) |
| 1193 | batadv_tt_local_entry_free_ref(local_entry); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1194 | } |
| 1195 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1196 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
| 1197 | struct batadv_orig_node *orig_node, |
| 1198 | const char *message) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1199 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1200 | struct batadv_tt_global_entry *tt_global; |
| 1201 | struct batadv_tt_common_entry *tt_common_entry; |
Antonio Quartulli | c90681b | 2011-10-05 17:05:25 +0200 | [diff] [blame] | 1202 | uint32_t i; |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1203 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1204 | struct hlist_node *safe; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1205 | struct hlist_head *head; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1206 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1207 | |
Simon Wunderlich | 6e80149 | 2011-10-19 10:28:26 +0200 | [diff] [blame] | 1208 | if (!hash) |
| 1209 | return; |
| 1210 | |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1211 | for (i = 0; i < hash->size; i++) { |
| 1212 | head = &hash->table[i]; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1213 | list_lock = &hash->list_locks[i]; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1214 | |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1215 | spin_lock_bh(list_lock); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1216 | hlist_for_each_entry_safe(tt_common_entry, safe, |
Sven Eckelmann | 7c64fd9 | 2012-02-28 10:55:36 +0100 | [diff] [blame] | 1217 | head, hash_entry) { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1218 | tt_global = container_of(tt_common_entry, |
| 1219 | struct batadv_tt_global_entry, |
| 1220 | common); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1221 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1222 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1223 | orig_node, message); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1224 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1225 | if (hlist_empty(&tt_global->orig_list)) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1226 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1227 | "Deleting global tt entry %pM: %s\n", |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1228 | tt_global->common.addr, message); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1229 | hlist_del_rcu(&tt_common_entry->hash_entry); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1230 | batadv_tt_global_entry_free_ref(tt_global); |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1231 | } |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1232 | } |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1233 | spin_unlock_bh(list_lock); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1234 | } |
Antonio Quartulli | 1707157 | 2011-11-07 16:36:40 +0100 | [diff] [blame] | 1235 | orig_node->tt_initialised = false; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1236 | } |
| 1237 | |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 1238 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
| 1239 | char **msg) |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 1240 | { |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 1241 | bool purge = false; |
| 1242 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; |
| 1243 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1244 | |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 1245 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
| 1246 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { |
| 1247 | purge = true; |
| 1248 | *msg = "Roaming timeout\n"; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1249 | } |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 1250 | |
| 1251 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
| 1252 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { |
| 1253 | purge = true; |
| 1254 | *msg = "Temporary client timeout\n"; |
| 1255 | } |
| 1256 | |
| 1257 | return purge; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1258 | } |
| 1259 | |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 1260 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1261 | { |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1262 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 1263 | struct hlist_head *head; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1264 | struct hlist_node *node_tmp; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1265 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
Antonio Quartulli | c90681b | 2011-10-05 17:05:25 +0200 | [diff] [blame] | 1266 | uint32_t i; |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 1267 | char *msg = NULL; |
| 1268 | struct batadv_tt_common_entry *tt_common; |
| 1269 | struct batadv_tt_global_entry *tt_global; |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 1270 | |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 1271 | for (i = 0; i < hash->size; i++) { |
| 1272 | head = &hash->table[i]; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1273 | list_lock = &hash->list_locks[i]; |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 1274 | |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1275 | spin_lock_bh(list_lock); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1276 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 1277 | hash_entry) { |
| 1278 | tt_global = container_of(tt_common, |
| 1279 | struct batadv_tt_global_entry, |
| 1280 | common); |
| 1281 | |
| 1282 | if (!batadv_tt_global_to_purge(tt_global, &msg)) |
| 1283 | continue; |
| 1284 | |
| 1285 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
| 1286 | "Deleting global tt entry (%pM): %s\n", |
| 1287 | tt_global->common.addr, msg); |
| 1288 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1289 | hlist_del_rcu(&tt_common->hash_entry); |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 1290 | |
| 1291 | batadv_tt_global_entry_free_ref(tt_global); |
| 1292 | } |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1293 | spin_unlock_bh(list_lock); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 1294 | } |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 1295 | } |
| 1296 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1297 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1298 | { |
Sven Eckelmann | 5bf74e9 | 2012-06-05 22:31:28 +0200 | [diff] [blame] | 1299 | struct batadv_hashtable *hash; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1300 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1301 | struct batadv_tt_common_entry *tt_common_entry; |
| 1302 | struct batadv_tt_global_entry *tt_global; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1303 | struct hlist_node *node_tmp; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1304 | struct hlist_head *head; |
Antonio Quartulli | c90681b | 2011-10-05 17:05:25 +0200 | [diff] [blame] | 1305 | uint32_t i; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1306 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1307 | if (!bat_priv->tt.global_hash) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1308 | return; |
| 1309 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1310 | hash = bat_priv->tt.global_hash; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1311 | |
| 1312 | for (i = 0; i < hash->size; i++) { |
| 1313 | head = &hash->table[i]; |
| 1314 | list_lock = &hash->list_locks[i]; |
| 1315 | |
| 1316 | spin_lock_bh(list_lock); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1317 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1318 | head, hash_entry) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1319 | hlist_del_rcu(&tt_common_entry->hash_entry); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1320 | tt_global = container_of(tt_common_entry, |
| 1321 | struct batadv_tt_global_entry, |
| 1322 | common); |
| 1323 | batadv_tt_global_entry_free_ref(tt_global); |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1324 | } |
| 1325 | spin_unlock_bh(list_lock); |
| 1326 | } |
| 1327 | |
Sven Eckelmann | 1a8eaf0 | 2012-05-12 02:09:32 +0200 | [diff] [blame] | 1328 | batadv_hash_destroy(hash); |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 1329 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1330 | bat_priv->tt.global_hash = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1331 | } |
| 1332 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1333 | static bool |
| 1334 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, |
| 1335 | struct batadv_tt_global_entry *tt_global_entry) |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 1336 | { |
| 1337 | bool ret = false; |
| 1338 | |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1339 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
| 1340 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 1341 | ret = true; |
| 1342 | |
| 1343 | return ret; |
| 1344 | } |
| 1345 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1346 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
| 1347 | const uint8_t *src, |
| 1348 | const uint8_t *addr) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1349 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1350 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
| 1351 | struct batadv_tt_global_entry *tt_global_entry = NULL; |
| 1352 | struct batadv_orig_node *orig_node = NULL; |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 1353 | struct batadv_tt_orig_list_entry *best_entry; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1354 | |
Antonio Quartulli | 3d393e4 | 2011-07-07 15:35:37 +0200 | [diff] [blame] | 1355 | if (src && atomic_read(&bat_priv->ap_isolation)) { |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1356 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src); |
Antonio Quartulli | 068ee6e | 2012-09-23 22:38:37 +0200 | [diff] [blame] | 1357 | if (!tt_local_entry || |
| 1358 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) |
Antonio Quartulli | 3d393e4 | 2011-07-07 15:35:37 +0200 | [diff] [blame] | 1359 | goto out; |
| 1360 | } |
Marek Lindner | 7aadf88 | 2011-02-18 12:28:09 +0000 | [diff] [blame] | 1361 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1362 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
Antonio Quartulli | 2dafb49 | 2011-05-05 08:42:45 +0200 | [diff] [blame] | 1363 | if (!tt_global_entry) |
Marek Lindner | 7b36e8e | 2011-02-18 12:28:10 +0000 | [diff] [blame] | 1364 | goto out; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1365 | |
Antonio Quartulli | 3d393e4 | 2011-07-07 15:35:37 +0200 | [diff] [blame] | 1366 | /* check whether the clients should not communicate due to AP |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1367 | * isolation |
| 1368 | */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1369 | if (tt_local_entry && |
| 1370 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
Antonio Quartulli | 3d393e4 | 2011-07-07 15:35:37 +0200 | [diff] [blame] | 1371 | goto out; |
| 1372 | |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1373 | rcu_read_lock(); |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 1374 | best_entry = batadv_transtable_best_orig(tt_global_entry); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1375 | /* found anything? */ |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 1376 | if (best_entry) |
| 1377 | orig_node = best_entry->orig_node; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1378 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
| 1379 | orig_node = NULL; |
| 1380 | rcu_read_unlock(); |
Sven Eckelmann | 981d890 | 2012-10-07 13:34:15 +0200 | [diff] [blame] | 1381 | |
Marek Lindner | 7b36e8e | 2011-02-18 12:28:10 +0000 | [diff] [blame] | 1382 | out: |
Antonio Quartulli | 3d393e4 | 2011-07-07 15:35:37 +0200 | [diff] [blame] | 1383 | if (tt_global_entry) |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1384 | batadv_tt_global_entry_free_ref(tt_global_entry); |
Antonio Quartulli | 3d393e4 | 2011-07-07 15:35:37 +0200 | [diff] [blame] | 1385 | if (tt_local_entry) |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1386 | batadv_tt_local_entry_free_ref(tt_local_entry); |
Antonio Quartulli | 3d393e4 | 2011-07-07 15:35:37 +0200 | [diff] [blame] | 1387 | |
Marek Lindner | 7b36e8e | 2011-02-18 12:28:10 +0000 | [diff] [blame] | 1388 | return orig_node; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 1389 | } |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1390 | |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1391 | /** |
| 1392 | * batadv_tt_global_crc - calculates the checksum of the local table belonging |
| 1393 | * to the given orig_node |
| 1394 | * @bat_priv: the bat priv with all the soft interface information |
| 1395 | */ |
| 1396 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1397 | struct batadv_orig_node *orig_node) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1398 | { |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1399 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1400 | struct batadv_tt_common_entry *tt_common; |
| 1401 | struct batadv_tt_global_entry *tt_global; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1402 | struct hlist_head *head; |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1403 | uint32_t i, crc = 0; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1404 | |
| 1405 | for (i = 0; i < hash->size; i++) { |
| 1406 | head = &hash->table[i]; |
| 1407 | |
| 1408 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1409 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1410 | tt_global = container_of(tt_common, |
| 1411 | struct batadv_tt_global_entry, |
| 1412 | common); |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1413 | /* Roaming clients are in the global table for |
| 1414 | * consistency only. They don't have to be |
| 1415 | * taken into account while computing the |
| 1416 | * global crc |
| 1417 | */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1418 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1419 | continue; |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 1420 | /* Temporary clients have not been announced yet, so |
| 1421 | * they have to be skipped while computing the global |
| 1422 | * crc |
| 1423 | */ |
| 1424 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) |
| 1425 | continue; |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1426 | |
| 1427 | /* find out if this global entry is announced by this |
| 1428 | * originator |
| 1429 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1430 | if (!batadv_tt_global_entry_has_orig(tt_global, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1431 | orig_node)) |
Simon Wunderlich | db08e6e | 2011-10-22 20:12:51 +0200 | [diff] [blame] | 1432 | continue; |
| 1433 | |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1434 | crc ^= crc32c(0, tt_common->addr, ETH_ALEN); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1435 | } |
| 1436 | rcu_read_unlock(); |
| 1437 | } |
| 1438 | |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1439 | return crc; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1440 | } |
| 1441 | |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1442 | /** |
| 1443 | * batadv_tt_local_crc - calculates the checksum of the local table |
| 1444 | * @bat_priv: the bat priv with all the soft interface information |
| 1445 | */ |
| 1446 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1447 | { |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1448 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1449 | struct batadv_tt_common_entry *tt_common; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1450 | struct hlist_head *head; |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1451 | uint32_t i, crc = 0; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1452 | |
| 1453 | for (i = 0; i < hash->size; i++) { |
| 1454 | head = &hash->table[i]; |
| 1455 | |
| 1456 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1457 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 1458 | /* not yet committed clients have not to be taken into |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1459 | * account while computing the CRC |
| 1460 | */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1461 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 1462 | continue; |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1463 | |
| 1464 | crc ^= crc32c(0, tt_common->addr, ETH_ALEN); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1465 | } |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1466 | rcu_read_unlock(); |
| 1467 | } |
| 1468 | |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1469 | return crc; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1470 | } |
| 1471 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1472 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1473 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1474 | struct batadv_tt_req_node *node, *safe; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1475 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1476 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1477 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1478 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1479 | list_del(&node->list); |
| 1480 | kfree(node); |
| 1481 | } |
| 1482 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1483 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1484 | } |
| 1485 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1486 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
| 1487 | struct batadv_orig_node *orig_node, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1488 | const unsigned char *tt_buff, |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 1489 | uint16_t tt_num_changes) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1490 | { |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 1491 | uint16_t tt_buff_len = batadv_tt_len(tt_num_changes); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1492 | |
| 1493 | /* Replace the old buffer only if I received something in the |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1494 | * last OGM (the OGM could carry no changes) |
| 1495 | */ |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1496 | spin_lock_bh(&orig_node->tt_buff_lock); |
| 1497 | if (tt_buff_len > 0) { |
| 1498 | kfree(orig_node->tt_buff); |
| 1499 | orig_node->tt_buff_len = 0; |
| 1500 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); |
| 1501 | if (orig_node->tt_buff) { |
| 1502 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); |
| 1503 | orig_node->tt_buff_len = tt_buff_len; |
| 1504 | } |
| 1505 | } |
| 1506 | spin_unlock_bh(&orig_node->tt_buff_lock); |
| 1507 | } |
| 1508 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1509 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1510 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1511 | struct batadv_tt_req_node *node, *safe; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1512 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1513 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
| 1514 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1515 | if (batadv_has_timed_out(node->issued_at, |
| 1516 | BATADV_TT_REQUEST_TIMEOUT)) { |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1517 | list_del(&node->list); |
| 1518 | kfree(node); |
| 1519 | } |
| 1520 | } |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1521 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1522 | } |
| 1523 | |
| 1524 | /* returns the pointer to the new tt_req_node struct if no request |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1525 | * has already been issued for this orig_node, NULL otherwise |
| 1526 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1527 | static struct batadv_tt_req_node * |
| 1528 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, |
| 1529 | struct batadv_orig_node *orig_node) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1530 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1531 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1532 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1533 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
| 1534 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1535 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
| 1536 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1537 | BATADV_TT_REQUEST_TIMEOUT)) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1538 | goto unlock; |
| 1539 | } |
| 1540 | |
| 1541 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); |
| 1542 | if (!tt_req_node) |
| 1543 | goto unlock; |
| 1544 | |
| 1545 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); |
| 1546 | tt_req_node->issued_at = jiffies; |
| 1547 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1548 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1549 | unlock: |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1550 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1551 | return tt_req_node; |
| 1552 | } |
| 1553 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1554 | /** |
| 1555 | * batadv_tt_local_valid - verify that given tt entry is a valid one |
| 1556 | * @entry_ptr: to be checked local tt entry |
| 1557 | * @data_ptr: not used but definition required to satisfy the callback prototype |
| 1558 | * |
| 1559 | * Returns 1 if the entry is a valid, 0 otherwise. |
| 1560 | */ |
| 1561 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 1562 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1563 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 1564 | |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1565 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 1566 | return 0; |
| 1567 | return 1; |
| 1568 | } |
| 1569 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1570 | static int batadv_tt_global_valid(const void *entry_ptr, |
| 1571 | const void *data_ptr) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1572 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1573 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
| 1574 | const struct batadv_tt_global_entry *tt_global_entry; |
| 1575 | const struct batadv_orig_node *orig_node = data_ptr; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1576 | |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 1577 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
| 1578 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 1579 | return 0; |
| 1580 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1581 | tt_global_entry = container_of(tt_common_entry, |
| 1582 | struct batadv_tt_global_entry, |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 1583 | common); |
| 1584 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1585 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1586 | } |
| 1587 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1588 | /** |
| 1589 | * batadv_tt_tvlv_generate - creates tvlv tt data buffer to fill it with the |
| 1590 | * tt entries from the specified tt hash |
| 1591 | * @bat_priv: the bat priv with all the soft interface information |
| 1592 | * @hash: hash table containing the tt entries |
| 1593 | * @tt_len: expected tvlv tt data buffer length in number of bytes |
| 1594 | * @valid_cb: function to filter tt change entries |
| 1595 | * @cb_data: data passed to the filter function as argument |
| 1596 | * |
| 1597 | * Returns pointer to allocated tvlv tt data buffer if operation was |
| 1598 | * successful or NULL otherwise. |
| 1599 | */ |
| 1600 | static struct batadv_tvlv_tt_data * |
| 1601 | batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
| 1602 | struct batadv_hashtable *hash, uint16_t tt_len, |
| 1603 | int (*valid_cb)(const void *, const void *), |
| 1604 | void *cb_data) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1605 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1606 | struct batadv_tt_common_entry *tt_common_entry; |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1607 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
| 1608 | struct batadv_tvlv_tt_change *tt_change; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1609 | struct hlist_head *head; |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1610 | uint16_t tt_tot, tt_num_entries = 0; |
| 1611 | ssize_t tvlv_tt_size = sizeof(struct batadv_tvlv_tt_data); |
Antonio Quartulli | c90681b | 2011-10-05 17:05:25 +0200 | [diff] [blame] | 1612 | uint32_t i; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1613 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1614 | if (tvlv_tt_size + tt_len > bat_priv->soft_iface->mtu) { |
| 1615 | tt_len = bat_priv->soft_iface->mtu - tvlv_tt_size; |
| 1616 | tt_len -= tt_len % sizeof(struct batadv_tvlv_tt_change); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1617 | } |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1618 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1619 | tt_tot = tt_len / sizeof(struct batadv_tvlv_tt_change); |
| 1620 | |
| 1621 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len, |
| 1622 | GFP_ATOMIC); |
| 1623 | if (!tvlv_tt_data) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1624 | goto out; |
| 1625 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1626 | tt_change = (struct batadv_tvlv_tt_change *)(tvlv_tt_data + 1); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1627 | |
| 1628 | rcu_read_lock(); |
| 1629 | for (i = 0; i < hash->size; i++) { |
| 1630 | head = &hash->table[i]; |
| 1631 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1632 | hlist_for_each_entry_rcu(tt_common_entry, |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1633 | head, hash_entry) { |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1634 | if (tt_tot == tt_num_entries) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1635 | break; |
| 1636 | |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 1637 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1638 | continue; |
| 1639 | |
Antonio Quartulli | 48100ba | 2011-10-30 12:17:33 +0100 | [diff] [blame] | 1640 | memcpy(tt_change->addr, tt_common_entry->addr, |
| 1641 | ETH_ALEN); |
Antonio Quartulli | 27b37eb | 2012-11-08 14:21:11 +0100 | [diff] [blame] | 1642 | tt_change->flags = tt_common_entry->flags; |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1643 | tt_change->reserved = 0; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1644 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1645 | tt_num_entries++; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1646 | tt_change++; |
| 1647 | } |
| 1648 | } |
| 1649 | rcu_read_unlock(); |
| 1650 | |
| 1651 | out: |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1652 | return tvlv_tt_data; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1653 | } |
| 1654 | |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1655 | /** |
| 1656 | * batadv_send_tt_request - send a TT Request message to a given node |
| 1657 | * @bat_priv: the bat priv with all the soft interface information |
| 1658 | * @dst_orig_node: the destination of the message |
| 1659 | * @ttvn: the version number that the source of the message is looking for |
| 1660 | * @tt_crc: the CRC associated with the version number |
| 1661 | * @full_table: ask for the entire translation table if true, while only for the |
| 1662 | * last TT diff otherwise |
| 1663 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1664 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
| 1665 | struct batadv_orig_node *dst_orig_node, |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1666 | uint8_t ttvn, uint32_t tt_crc, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1667 | bool full_table) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1668 | { |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1669 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1670 | struct batadv_hard_iface *primary_if; |
| 1671 | struct batadv_tt_req_node *tt_req_node = NULL; |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1672 | bool ret = false; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1673 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 1674 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1675 | if (!primary_if) |
| 1676 | goto out; |
| 1677 | |
| 1678 | /* The new tt_req will be issued only if I'm not waiting for a |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1679 | * reply from the same orig_node yet |
| 1680 | */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1681 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1682 | if (!tt_req_node) |
| 1683 | goto out; |
| 1684 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1685 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data), GFP_ATOMIC); |
| 1686 | if (!tvlv_tt_data) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1687 | goto out; |
| 1688 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1689 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
| 1690 | tvlv_tt_data->ttvn = ttvn; |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1691 | tvlv_tt_data->crc = htonl(tt_crc); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1692 | |
| 1693 | if (full_table) |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1694 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1695 | |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 1696 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1697 | dst_orig_node->orig, full_table ? 'F' : '.'); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1698 | |
Sven Eckelmann | d69909d | 2012-06-03 22:19:20 +0200 | [diff] [blame] | 1699 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1700 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
| 1701 | dst_orig_node->orig, BATADV_TVLV_TT, 1, |
| 1702 | tvlv_tt_data, sizeof(*tvlv_tt_data)); |
| 1703 | ret = true; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1704 | |
| 1705 | out: |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1706 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 1707 | batadv_hardif_free_ref(primary_if); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1708 | if (ret && tt_req_node) { |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1709 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1710 | list_del(&tt_req_node->list); |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1711 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1712 | kfree(tt_req_node); |
| 1713 | } |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1714 | kfree(tvlv_tt_data); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1715 | return ret; |
| 1716 | } |
| 1717 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1718 | /** |
| 1719 | * batadv_send_other_tt_response - send reply to tt request concerning another |
| 1720 | * node's translation table |
| 1721 | * @bat_priv: the bat priv with all the soft interface information |
| 1722 | * @tt_data: tt data containing the tt request information |
| 1723 | * @req_src: mac address of tt request sender |
| 1724 | * @req_dst: mac address of tt request recipient |
| 1725 | * |
| 1726 | * Returns true if tt request reply was sent, false otherwise. |
| 1727 | */ |
| 1728 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, |
| 1729 | struct batadv_tvlv_tt_data *tt_data, |
| 1730 | uint8_t *req_src, uint8_t *req_dst) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1731 | { |
Sven Eckelmann | 170173b | 2012-10-07 12:02:22 +0200 | [diff] [blame] | 1732 | struct batadv_orig_node *req_dst_orig_node; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1733 | struct batadv_orig_node *res_dst_orig_node = NULL; |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1734 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
| 1735 | uint8_t orig_ttvn, req_ttvn; |
| 1736 | uint16_t tt_len; |
| 1737 | bool ret = false, full_table; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1738 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1739 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1740 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1741 | req_src, tt_data->ttvn, req_dst, |
| 1742 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1743 | |
| 1744 | /* Let's get the orig node of the REAL destination */ |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1745 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1746 | if (!req_dst_orig_node) |
| 1747 | goto out; |
| 1748 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1749 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1750 | if (!res_dst_orig_node) |
| 1751 | goto out; |
| 1752 | |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1753 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1754 | req_ttvn = tt_data->ttvn; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1755 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1756 | /* this node doesn't have the requested data */ |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1757 | if (orig_ttvn != req_ttvn || |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 1758 | tt_data->crc != htonl(req_dst_orig_node->tt_crc)) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1759 | goto out; |
| 1760 | |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 1761 | /* If the full table has been explicitly requested */ |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1762 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1763 | !req_dst_orig_node->tt_buff) |
| 1764 | full_table = true; |
| 1765 | else |
| 1766 | full_table = false; |
| 1767 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1768 | /* TT fragmentation hasn't been implemented yet, so send as many |
| 1769 | * TT entries fit a single packet as possible only |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1770 | */ |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1771 | if (!full_table) { |
| 1772 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); |
| 1773 | tt_len = req_dst_orig_node->tt_buff_len; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1774 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1775 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len, |
| 1776 | GFP_ATOMIC); |
| 1777 | if (!tvlv_tt_data) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1778 | goto unlock; |
| 1779 | |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1780 | /* Copy the last orig_node's OGM buffer */ |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1781 | memcpy(tvlv_tt_data + 1, req_dst_orig_node->tt_buff, |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1782 | req_dst_orig_node->tt_buff_len); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1783 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
| 1784 | } else { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1785 | tt_len = (uint16_t)atomic_read(&req_dst_orig_node->tt_size); |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1786 | tt_len = batadv_tt_len(tt_len); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1787 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1788 | tvlv_tt_data = batadv_tt_tvlv_generate(bat_priv, |
| 1789 | bat_priv->tt.global_hash, |
| 1790 | tt_len, |
| 1791 | batadv_tt_global_valid, |
| 1792 | req_dst_orig_node); |
| 1793 | if (!tvlv_tt_data) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1794 | goto out; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1795 | } |
| 1796 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1797 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
| 1798 | tvlv_tt_data->ttvn = req_ttvn; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1799 | |
| 1800 | if (full_table) |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1801 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1802 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1803 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1804 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
| 1805 | res_dst_orig_node->orig, req_dst_orig_node->orig, |
| 1806 | full_table ? 'F' : '.', req_ttvn); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1807 | |
Sven Eckelmann | d69909d | 2012-06-03 22:19:20 +0200 | [diff] [blame] | 1808 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 1809 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1810 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
| 1811 | req_src, BATADV_TVLV_TT, 1, |
| 1812 | tvlv_tt_data, sizeof(*tvlv_tt_data) + tt_len); |
Martin Hundebøll | e91ecfc | 2013-04-20 13:54:39 +0200 | [diff] [blame] | 1813 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1814 | ret = true; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1815 | goto out; |
| 1816 | |
| 1817 | unlock: |
| 1818 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
| 1819 | |
| 1820 | out: |
| 1821 | if (res_dst_orig_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1822 | batadv_orig_node_free_ref(res_dst_orig_node); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1823 | if (req_dst_orig_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1824 | batadv_orig_node_free_ref(req_dst_orig_node); |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1825 | kfree(tvlv_tt_data); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1826 | return ret; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1827 | } |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1828 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1829 | /** |
| 1830 | * batadv_send_my_tt_response - send reply to tt request concerning this node's |
| 1831 | * translation table |
| 1832 | * @bat_priv: the bat priv with all the soft interface information |
| 1833 | * @tt_data: tt data containing the tt request information |
| 1834 | * @req_src: mac address of tt request sender |
| 1835 | * |
| 1836 | * Returns true if tt request reply was sent, false otherwise. |
| 1837 | */ |
| 1838 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, |
| 1839 | struct batadv_tvlv_tt_data *tt_data, |
| 1840 | uint8_t *req_src) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1841 | { |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1842 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
Sven Eckelmann | 170173b | 2012-10-07 12:02:22 +0200 | [diff] [blame] | 1843 | struct batadv_orig_node *orig_node; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1844 | struct batadv_hard_iface *primary_if = NULL; |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1845 | uint8_t my_ttvn, req_ttvn; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1846 | bool full_table; |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1847 | uint16_t tt_len; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1848 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1849 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1850 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1851 | req_src, tt_data->ttvn, |
| 1852 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1853 | |
| 1854 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1855 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1856 | req_ttvn = tt_data->ttvn; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1857 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1858 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1859 | if (!orig_node) |
| 1860 | goto out; |
| 1861 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 1862 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1863 | if (!primary_if) |
| 1864 | goto out; |
| 1865 | |
| 1866 | /* If the full table has been explicitly requested or the gap |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1867 | * is too big send the whole local translation table |
| 1868 | */ |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1869 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1870 | !bat_priv->tt.last_changeset) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1871 | full_table = true; |
| 1872 | else |
| 1873 | full_table = false; |
| 1874 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1875 | /* TT fragmentation hasn't been implemented yet, so send as many |
| 1876 | * TT entries fit a single packet as possible only |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1877 | */ |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1878 | if (!full_table) { |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1879 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
| 1880 | tt_len = bat_priv->tt.last_changeset_len; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1881 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1882 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len, |
| 1883 | GFP_ATOMIC); |
| 1884 | if (!tvlv_tt_data) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1885 | goto unlock; |
| 1886 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1887 | /* Copy the last orig_node's OGM buffer */ |
| 1888 | memcpy(tvlv_tt_data + 1, bat_priv->tt.last_changeset, |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1889 | bat_priv->tt.last_changeset_len); |
| 1890 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1891 | } else { |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1892 | tt_len = (uint16_t)atomic_read(&bat_priv->tt.local_entry_num); |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1893 | tt_len = batadv_tt_len(tt_len); |
| 1894 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1895 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1896 | tvlv_tt_data = batadv_tt_tvlv_generate(bat_priv, |
| 1897 | bat_priv->tt.local_hash, |
| 1898 | tt_len, |
| 1899 | batadv_tt_local_valid, |
| 1900 | NULL); |
| 1901 | if (!tvlv_tt_data) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1902 | goto out; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1903 | } |
| 1904 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1905 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
| 1906 | tvlv_tt_data->ttvn = req_ttvn; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1907 | |
| 1908 | if (full_table) |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1909 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1910 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1911 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1912 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
| 1913 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1914 | |
Sven Eckelmann | d69909d | 2012-06-03 22:19:20 +0200 | [diff] [blame] | 1915 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 1916 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1917 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
| 1918 | req_src, BATADV_TVLV_TT, 1, |
| 1919 | tvlv_tt_data, sizeof(*tvlv_tt_data) + tt_len); |
| 1920 | |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1921 | goto out; |
| 1922 | |
| 1923 | unlock: |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 1924 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1925 | out: |
| 1926 | if (orig_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1927 | batadv_orig_node_free_ref(orig_node); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1928 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 1929 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1930 | kfree(tvlv_tt_data); |
| 1931 | /* The packet was for this host, so it doesn't need to be re-routed */ |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1932 | return true; |
| 1933 | } |
| 1934 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1935 | /** |
| 1936 | * batadv_send_tt_response - send reply to tt request |
| 1937 | * @bat_priv: the bat priv with all the soft interface information |
| 1938 | * @tt_data: tt data containing the tt request information |
| 1939 | * @req_src: mac address of tt request sender |
| 1940 | * @req_dst: mac address of tt request recipient |
| 1941 | * |
| 1942 | * Returns true if tt request reply was sent, false otherwise. |
| 1943 | */ |
| 1944 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, |
| 1945 | struct batadv_tvlv_tt_data *tt_data, |
| 1946 | uint8_t *req_src, uint8_t *req_dst) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1947 | { |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1948 | if (batadv_is_my_mac(bat_priv, req_dst)) { |
Simon Wunderlich | 20ff9d5 | 2012-01-22 20:00:23 +0100 | [diff] [blame] | 1949 | /* don't answer backbone gws! */ |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1950 | if (batadv_bla_is_backbone_gw_orig(bat_priv, req_src)) |
Simon Wunderlich | 20ff9d5 | 2012-01-22 20:00:23 +0100 | [diff] [blame] | 1951 | return true; |
| 1952 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1953 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
Simon Wunderlich | 20ff9d5 | 2012-01-22 20:00:23 +0100 | [diff] [blame] | 1954 | } else { |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1955 | return batadv_send_other_tt_response(bat_priv, tt_data, |
| 1956 | req_src, req_dst); |
Simon Wunderlich | 20ff9d5 | 2012-01-22 20:00:23 +0100 | [diff] [blame] | 1957 | } |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1958 | } |
| 1959 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1960 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
| 1961 | struct batadv_orig_node *orig_node, |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1962 | struct batadv_tvlv_tt_change *tt_change, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1963 | uint16_t tt_num_changes, uint8_t ttvn) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1964 | { |
| 1965 | int i; |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1966 | int roams; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1967 | |
| 1968 | for (i = 0; i < tt_num_changes; i++) { |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1969 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
| 1970 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 1971 | batadv_tt_global_del(bat_priv, orig_node, |
| 1972 | (tt_change + i)->addr, |
Antonio Quartulli | d4f4469 | 2012-05-25 00:00:54 +0200 | [diff] [blame] | 1973 | "tt removed by changes", |
| 1974 | roams); |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 1975 | } else { |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 1976 | if (!batadv_tt_global_add(bat_priv, orig_node, |
Antonio Quartulli | d4f4469 | 2012-05-25 00:00:54 +0200 | [diff] [blame] | 1977 | (tt_change + i)->addr, |
| 1978 | (tt_change + i)->flags, ttvn)) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1979 | /* In case of problem while storing a |
| 1980 | * global_entry, we stop the updating |
| 1981 | * procedure without committing the |
| 1982 | * ttvn change. This will avoid to send |
| 1983 | * corrupted data on tt_request |
| 1984 | */ |
| 1985 | return; |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 1986 | } |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1987 | } |
Antonio Quartulli | 1707157 | 2011-11-07 16:36:40 +0100 | [diff] [blame] | 1988 | orig_node->tt_initialised = true; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1989 | } |
| 1990 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1991 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1992 | struct batadv_tvlv_tt_data *tt_data, |
| 1993 | uint8_t *resp_src, uint16_t num_entries) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1994 | { |
Sven Eckelmann | 170173b | 2012-10-07 12:02:22 +0200 | [diff] [blame] | 1995 | struct batadv_orig_node *orig_node; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1996 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 1997 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 1998 | if (!orig_node) |
| 1999 | goto out; |
| 2000 | |
| 2001 | /* Purge the old table first.. */ |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 2002 | batadv_tt_global_del_orig(bat_priv, orig_node, "Received full table"); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2003 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2004 | _batadv_tt_update_changes(bat_priv, orig_node, |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2005 | (struct batadv_tvlv_tt_change *)(tt_data + 1), |
| 2006 | num_entries, tt_data->ttvn); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2007 | |
| 2008 | spin_lock_bh(&orig_node->tt_buff_lock); |
| 2009 | kfree(orig_node->tt_buff); |
| 2010 | orig_node->tt_buff_len = 0; |
| 2011 | orig_node->tt_buff = NULL; |
| 2012 | spin_unlock_bh(&orig_node->tt_buff_lock); |
| 2013 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2014 | atomic_set(&orig_node->last_ttvn, tt_data->ttvn); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2015 | |
| 2016 | out: |
| 2017 | if (orig_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 2018 | batadv_orig_node_free_ref(orig_node); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2019 | } |
| 2020 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2021 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
| 2022 | struct batadv_orig_node *orig_node, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2023 | uint16_t tt_num_changes, uint8_t ttvn, |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2024 | struct batadv_tvlv_tt_change *tt_change) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2025 | { |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2026 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
| 2027 | tt_num_changes, ttvn); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2028 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2029 | batadv_tt_save_orig_buffer(bat_priv, orig_node, |
| 2030 | (unsigned char *)tt_change, tt_num_changes); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2031 | atomic_set(&orig_node->last_ttvn, ttvn); |
| 2032 | } |
| 2033 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2034 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2035 | { |
Sven Eckelmann | 170173b | 2012-10-07 12:02:22 +0200 | [diff] [blame] | 2036 | struct batadv_tt_local_entry *tt_local_entry; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 2037 | bool ret = false; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2038 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2039 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 2040 | if (!tt_local_entry) |
| 2041 | goto out; |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2042 | /* Check if the client has been logically deleted (but is kept for |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 2043 | * consistency purpose) |
| 2044 | */ |
Antonio Quartulli | 7c1fd91 | 2012-09-23 22:38:34 +0200 | [diff] [blame] | 2045 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
| 2046 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2047 | goto out; |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 2048 | ret = true; |
| 2049 | out: |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2050 | if (tt_local_entry) |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2051 | batadv_tt_local_entry_free_ref(tt_local_entry); |
Antonio Quartulli | 7683fdc | 2011-04-27 14:28:07 +0200 | [diff] [blame] | 2052 | return ret; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2053 | } |
| 2054 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2055 | /** |
| 2056 | * batadv_handle_tt_response - process incoming tt reply |
| 2057 | * @bat_priv: the bat priv with all the soft interface information |
| 2058 | * @tt_data: tt data containing the tt request information |
| 2059 | * @resp_src: mac address of tt reply sender |
| 2060 | * @num_entries: number of tt change entries appended to the tt data |
| 2061 | */ |
| 2062 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, |
| 2063 | struct batadv_tvlv_tt_data *tt_data, |
| 2064 | uint8_t *resp_src, uint16_t num_entries) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2065 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2066 | struct batadv_tt_req_node *node, *safe; |
| 2067 | struct batadv_orig_node *orig_node = NULL; |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2068 | struct batadv_tvlv_tt_change *tt_change; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2069 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 2070 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 2071 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2072 | resp_src, tt_data->ttvn, num_entries, |
| 2073 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2074 | |
Simon Wunderlich | 20ff9d5 | 2012-01-22 20:00:23 +0100 | [diff] [blame] | 2075 | /* we should have never asked a backbone gw */ |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2076 | if (batadv_bla_is_backbone_gw_orig(bat_priv, resp_src)) |
Simon Wunderlich | 20ff9d5 | 2012-01-22 20:00:23 +0100 | [diff] [blame] | 2077 | goto out; |
| 2078 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2079 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2080 | if (!orig_node) |
| 2081 | goto out; |
| 2082 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2083 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
| 2084 | batadv_tt_fill_gtable(bat_priv, tt_data, resp_src, num_entries); |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 2085 | } else { |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2086 | tt_change = (struct batadv_tvlv_tt_change *)(tt_data + 1); |
| 2087 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
| 2088 | tt_data->ttvn, tt_change); |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 2089 | } |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2090 | |
| 2091 | /* Delete the tt_req_node from pending tt_requests list */ |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2092 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
| 2093 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2094 | if (!batadv_compare_eth(node->addr, resp_src)) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2095 | continue; |
| 2096 | list_del(&node->list); |
| 2097 | kfree(node); |
| 2098 | } |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2099 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2100 | |
| 2101 | /* Recalculate the CRC for this orig_node and store it */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2102 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2103 | out: |
| 2104 | if (orig_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 2105 | batadv_orig_node_free_ref(orig_node); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2106 | } |
| 2107 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2108 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2109 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2110 | struct batadv_tt_roam_node *node, *safe; |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2111 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2112 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2113 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2114 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2115 | list_del(&node->list); |
| 2116 | kfree(node); |
| 2117 | } |
| 2118 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2119 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2120 | } |
| 2121 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2122 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2123 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2124 | struct batadv_tt_roam_node *node, *safe; |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2125 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2126 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
| 2127 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 2128 | if (!batadv_has_timed_out(node->first_time, |
| 2129 | BATADV_ROAMING_MAX_TIME)) |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2130 | continue; |
| 2131 | |
| 2132 | list_del(&node->list); |
| 2133 | kfree(node); |
| 2134 | } |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2135 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2136 | } |
| 2137 | |
| 2138 | /* This function checks whether the client already reached the |
| 2139 | * maximum number of possible roaming phases. In this case the ROAMING_ADV |
| 2140 | * will not be sent. |
| 2141 | * |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 2142 | * returns true if the ROAMING_ADV can be sent, false otherwise |
| 2143 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2144 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2145 | uint8_t *client) |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2146 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2147 | struct batadv_tt_roam_node *tt_roam_node; |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2148 | bool ret = false; |
| 2149 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2150 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2151 | /* The new tt_req will be issued only if I'm not waiting for a |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 2152 | * reply from the same orig_node yet |
| 2153 | */ |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2154 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 2155 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2156 | continue; |
| 2157 | |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 2158 | if (batadv_has_timed_out(tt_roam_node->first_time, |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 2159 | BATADV_ROAMING_MAX_TIME)) |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2160 | continue; |
| 2161 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 2162 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2163 | /* Sorry, you roamed too many times! */ |
| 2164 | goto unlock; |
| 2165 | ret = true; |
| 2166 | break; |
| 2167 | } |
| 2168 | |
| 2169 | if (!ret) { |
| 2170 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); |
| 2171 | if (!tt_roam_node) |
| 2172 | goto unlock; |
| 2173 | |
| 2174 | tt_roam_node->first_time = jiffies; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 2175 | atomic_set(&tt_roam_node->counter, |
| 2176 | BATADV_ROAMING_MAX_COUNT - 1); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2177 | memcpy(tt_roam_node->addr, client, ETH_ALEN); |
| 2178 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2179 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2180 | ret = true; |
| 2181 | } |
| 2182 | |
| 2183 | unlock: |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2184 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2185 | return ret; |
| 2186 | } |
| 2187 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2188 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
| 2189 | struct batadv_orig_node *orig_node) |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2190 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2191 | struct batadv_hard_iface *primary_if; |
Marek Lindner | 122edaa | 2013-04-23 21:40:03 +0800 | [diff] [blame] | 2192 | struct batadv_tvlv_roam_adv tvlv_roam; |
| 2193 | |
| 2194 | primary_if = batadv_primary_if_get_selected(bat_priv); |
| 2195 | if (!primary_if) |
| 2196 | goto out; |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2197 | |
| 2198 | /* before going on we have to check whether the client has |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 2199 | * already roamed to us too many times |
| 2200 | */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2201 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2202 | goto out; |
| 2203 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 2204 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 2205 | "Sending ROAMING_ADV to %pM (client %pM)\n", |
| 2206 | orig_node->orig, client); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2207 | |
Sven Eckelmann | d69909d | 2012-06-03 22:19:20 +0200 | [diff] [blame] | 2208 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 2209 | |
Marek Lindner | 122edaa | 2013-04-23 21:40:03 +0800 | [diff] [blame] | 2210 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
| 2211 | tvlv_roam.reserved = 0; |
| 2212 | |
| 2213 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
| 2214 | orig_node->orig, BATADV_TVLV_ROAM, 1, |
| 2215 | &tvlv_roam, sizeof(tvlv_roam)); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2216 | |
| 2217 | out: |
Marek Lindner | 122edaa | 2013-04-23 21:40:03 +0800 | [diff] [blame] | 2218 | if (primary_if) |
| 2219 | batadv_hardif_free_ref(primary_if); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2220 | } |
| 2221 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2222 | static void batadv_tt_purge(struct work_struct *work) |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2223 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2224 | struct delayed_work *delayed_work; |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2225 | struct batadv_priv_tt *priv_tt; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2226 | struct batadv_priv *bat_priv; |
| 2227 | |
| 2228 | delayed_work = container_of(work, struct delayed_work, work); |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2229 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
| 2230 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2231 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2232 | batadv_tt_local_purge(bat_priv); |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 2233 | batadv_tt_global_purge(bat_priv); |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2234 | batadv_tt_req_purge(bat_priv); |
| 2235 | batadv_tt_roam_purge(bat_priv); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2236 | |
Antonio Quartulli | 7241444 | 2012-12-25 13:14:37 +0100 | [diff] [blame] | 2237 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
| 2238 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 2239 | } |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2240 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2241 | void batadv_tt_free(struct batadv_priv *bat_priv) |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2242 | { |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 2243 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
| 2244 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); |
| 2245 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2246 | cancel_delayed_work_sync(&bat_priv->tt.work); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2247 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2248 | batadv_tt_local_table_free(bat_priv); |
| 2249 | batadv_tt_global_table_free(bat_priv); |
| 2250 | batadv_tt_req_list_free(bat_priv); |
| 2251 | batadv_tt_changes_list_free(bat_priv); |
| 2252 | batadv_tt_roam_list_free(bat_priv); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2253 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2254 | kfree(bat_priv->tt.last_changeset); |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 2255 | } |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2256 | |
Antonio Quartulli | 697f253 | 2011-11-07 16:47:01 +0100 | [diff] [blame] | 2257 | /* This function will enable or disable the specified flags for all the entries |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 2258 | * in the given hash table and returns the number of modified entries |
| 2259 | */ |
Sven Eckelmann | 5bf74e9 | 2012-06-05 22:31:28 +0200 | [diff] [blame] | 2260 | static uint16_t batadv_tt_set_flags(struct batadv_hashtable *hash, |
| 2261 | uint16_t flags, bool enable) |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2262 | { |
Antonio Quartulli | c90681b | 2011-10-05 17:05:25 +0200 | [diff] [blame] | 2263 | uint32_t i; |
Antonio Quartulli | 697f253 | 2011-11-07 16:47:01 +0100 | [diff] [blame] | 2264 | uint16_t changed_num = 0; |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2265 | struct hlist_head *head; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2266 | struct batadv_tt_common_entry *tt_common_entry; |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2267 | |
| 2268 | if (!hash) |
Antonio Quartulli | 697f253 | 2011-11-07 16:47:01 +0100 | [diff] [blame] | 2269 | goto out; |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2270 | |
| 2271 | for (i = 0; i < hash->size; i++) { |
| 2272 | head = &hash->table[i]; |
| 2273 | |
| 2274 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2275 | hlist_for_each_entry_rcu(tt_common_entry, |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2276 | head, hash_entry) { |
Antonio Quartulli | 697f253 | 2011-11-07 16:47:01 +0100 | [diff] [blame] | 2277 | if (enable) { |
| 2278 | if ((tt_common_entry->flags & flags) == flags) |
| 2279 | continue; |
| 2280 | tt_common_entry->flags |= flags; |
| 2281 | } else { |
| 2282 | if (!(tt_common_entry->flags & flags)) |
| 2283 | continue; |
| 2284 | tt_common_entry->flags &= ~flags; |
| 2285 | } |
| 2286 | changed_num++; |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2287 | } |
| 2288 | rcu_read_unlock(); |
| 2289 | } |
Antonio Quartulli | 697f253 | 2011-11-07 16:47:01 +0100 | [diff] [blame] | 2290 | out: |
| 2291 | return changed_num; |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2292 | } |
| 2293 | |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 2294 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2295 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2296 | { |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2297 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2298 | struct batadv_tt_common_entry *tt_common; |
| 2299 | struct batadv_tt_local_entry *tt_local; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2300 | struct hlist_node *node_tmp; |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2301 | struct hlist_head *head; |
| 2302 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
Antonio Quartulli | c90681b | 2011-10-05 17:05:25 +0200 | [diff] [blame] | 2303 | uint32_t i; |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2304 | |
| 2305 | if (!hash) |
| 2306 | return; |
| 2307 | |
| 2308 | for (i = 0; i < hash->size; i++) { |
| 2309 | head = &hash->table[i]; |
| 2310 | list_lock = &hash->list_locks[i]; |
| 2311 | |
| 2312 | spin_lock_bh(list_lock); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2313 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 2314 | hash_entry) { |
| 2315 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2316 | continue; |
| 2317 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 2318 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 2319 | "Deleting local tt entry (%pM): pending\n", |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 2320 | tt_common->addr); |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2321 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2322 | atomic_dec(&bat_priv->tt.local_entry_num); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2323 | hlist_del_rcu(&tt_common->hash_entry); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2324 | tt_local = container_of(tt_common, |
| 2325 | struct batadv_tt_local_entry, |
| 2326 | common); |
| 2327 | batadv_tt_local_entry_free_ref(tt_local); |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2328 | } |
| 2329 | spin_unlock_bh(list_lock); |
| 2330 | } |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2331 | } |
| 2332 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 2333 | /** |
| 2334 | * batadv_tt_local_commit_changes - commit all pending local tt changes which |
| 2335 | * have been queued in the time since the last commit |
| 2336 | * @bat_priv: the bat priv with all the soft interface information |
| 2337 | */ |
| 2338 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2339 | { |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 2340 | uint16_t changed_num = 0; |
| 2341 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 2342 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
| 2343 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) |
| 2344 | batadv_tt_tvlv_container_update(bat_priv); |
| 2345 | return; |
| 2346 | } |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 2347 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2348 | changed_num = batadv_tt_set_flags(bat_priv->tt.local_hash, |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 2349 | BATADV_TT_CLIENT_NEW, false); |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 2350 | |
| 2351 | /* all reset entries have to be counted as local entries */ |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2352 | atomic_add(changed_num, &bat_priv->tt.local_entry_num); |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2353 | batadv_tt_local_purge_pending_clients(bat_priv); |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2354 | bat_priv->tt.local_crc = batadv_tt_local_crc(bat_priv); |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2355 | |
| 2356 | /* Increment the TTVN only once per OGM interval */ |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2357 | atomic_inc(&bat_priv->tt.vn); |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 2358 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 2359 | "Local changes committed, updating to ttvn %u\n", |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2360 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 2361 | |
| 2362 | /* reset the sending counter */ |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 2363 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 2364 | batadv_tt_tvlv_container_update(bat_priv); |
Antonio Quartulli | 058d0e2 | 2011-07-07 01:40:58 +0200 | [diff] [blame] | 2365 | } |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 2366 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2367 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 2368 | uint8_t *dst) |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 2369 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2370 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
| 2371 | struct batadv_tt_global_entry *tt_global_entry = NULL; |
Marek Lindner | 5870adc | 2012-06-20 17:16:05 +0200 | [diff] [blame] | 2372 | bool ret = false; |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 2373 | |
| 2374 | if (!atomic_read(&bat_priv->ap_isolation)) |
Marek Lindner | 5870adc | 2012-06-20 17:16:05 +0200 | [diff] [blame] | 2375 | goto out; |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 2376 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2377 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst); |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 2378 | if (!tt_local_entry) |
| 2379 | goto out; |
| 2380 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2381 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src); |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 2382 | if (!tt_global_entry) |
| 2383 | goto out; |
| 2384 | |
Antonio Quartulli | 1f129fe | 2012-06-25 20:49:50 +0000 | [diff] [blame] | 2385 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 2386 | goto out; |
| 2387 | |
Marek Lindner | 5870adc | 2012-06-20 17:16:05 +0200 | [diff] [blame] | 2388 | ret = true; |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 2389 | |
| 2390 | out: |
| 2391 | if (tt_global_entry) |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2392 | batadv_tt_global_entry_free_ref(tt_global_entry); |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 2393 | if (tt_local_entry) |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2394 | batadv_tt_local_entry_free_ref(tt_local_entry); |
Antonio Quartulli | 59b699c | 2011-07-07 15:35:36 +0200 | [diff] [blame] | 2395 | return ret; |
| 2396 | } |
Marek Lindner | a943cac | 2011-07-30 13:10:18 +0200 | [diff] [blame] | 2397 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 2398 | /** |
| 2399 | * batadv_tt_update_orig - update global translation table with new tt |
| 2400 | * information received via ogms |
| 2401 | * @bat_priv: the bat priv with all the soft interface information |
| 2402 | * @orig: the orig_node of the ogm |
| 2403 | * @tt_buff: buffer holding the tt information |
| 2404 | * @tt_num_changes: number of tt changes inside the tt buffer |
| 2405 | * @ttvn: translation table version number of this changeset |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 2406 | * @tt_crc: crc32 checksum of orig node's translation table |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 2407 | */ |
| 2408 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, |
| 2409 | struct batadv_orig_node *orig_node, |
| 2410 | const unsigned char *tt_buff, |
| 2411 | uint16_t tt_num_changes, uint8_t ttvn, |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 2412 | uint32_t tt_crc) |
Marek Lindner | a943cac | 2011-07-30 13:10:18 +0200 | [diff] [blame] | 2413 | { |
| 2414 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); |
| 2415 | bool full_table = true; |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2416 | struct batadv_tvlv_tt_change *tt_change; |
Marek Lindner | a943cac | 2011-07-30 13:10:18 +0200 | [diff] [blame] | 2417 | |
Simon Wunderlich | 20ff9d5 | 2012-01-22 20:00:23 +0100 | [diff] [blame] | 2418 | /* don't care about a backbone gateways updates. */ |
Sven Eckelmann | 08adf15 | 2012-05-12 13:38:47 +0200 | [diff] [blame] | 2419 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) |
Simon Wunderlich | 20ff9d5 | 2012-01-22 20:00:23 +0100 | [diff] [blame] | 2420 | return; |
| 2421 | |
Antonio Quartulli | 1707157 | 2011-11-07 16:36:40 +0100 | [diff] [blame] | 2422 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 2423 | * increased by one -> we can apply the attached changes |
| 2424 | */ |
Antonio Quartulli | 1707157 | 2011-11-07 16:36:40 +0100 | [diff] [blame] | 2425 | if ((!orig_node->tt_initialised && ttvn == 1) || |
| 2426 | ttvn - orig_ttvn == 1) { |
Marek Lindner | a943cac | 2011-07-30 13:10:18 +0200 | [diff] [blame] | 2427 | /* the OGM could not contain the changes due to their size or |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 2428 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
| 2429 | * times. |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 2430 | * In this case send a tt request |
| 2431 | */ |
Marek Lindner | a943cac | 2011-07-30 13:10:18 +0200 | [diff] [blame] | 2432 | if (!tt_num_changes) { |
| 2433 | full_table = false; |
| 2434 | goto request_table; |
| 2435 | } |
| 2436 | |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2437 | tt_change = (struct batadv_tvlv_tt_change *)tt_buff; |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2438 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 2439 | ttvn, tt_change); |
Marek Lindner | a943cac | 2011-07-30 13:10:18 +0200 | [diff] [blame] | 2440 | |
| 2441 | /* Even if we received the precomputed crc with the OGM, we |
| 2442 | * prefer to recompute it to spot any possible inconsistency |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 2443 | * in the global table |
| 2444 | */ |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2445 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
Marek Lindner | a943cac | 2011-07-30 13:10:18 +0200 | [diff] [blame] | 2446 | |
| 2447 | /* The ttvn alone is not enough to guarantee consistency |
| 2448 | * because a single value could represent different states |
| 2449 | * (due to the wrap around). Thus a node has to check whether |
| 2450 | * the resulting table (after applying the changes) is still |
| 2451 | * consistent or not. E.g. a node could disconnect while its |
| 2452 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case |
| 2453 | * checking the CRC value is mandatory to detect the |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 2454 | * inconsistency |
| 2455 | */ |
Marek Lindner | a943cac | 2011-07-30 13:10:18 +0200 | [diff] [blame] | 2456 | if (orig_node->tt_crc != tt_crc) |
| 2457 | goto request_table; |
Marek Lindner | a943cac | 2011-07-30 13:10:18 +0200 | [diff] [blame] | 2458 | } else { |
| 2459 | /* if we missed more than one change or our tables are not |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 2460 | * in sync anymore -> request fresh tt data |
| 2461 | */ |
Antonio Quartulli | 1707157 | 2011-11-07 16:36:40 +0100 | [diff] [blame] | 2462 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
| 2463 | orig_node->tt_crc != tt_crc) { |
Marek Lindner | a943cac | 2011-07-30 13:10:18 +0200 | [diff] [blame] | 2464 | request_table: |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 2465 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 2466 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u crc: %#.8x last_crc: %#.8x num_changes: %u)\n", |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 2467 | orig_node->orig, ttvn, orig_ttvn, tt_crc, |
| 2468 | orig_node->tt_crc, tt_num_changes); |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2469 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
| 2470 | tt_crc, full_table); |
Marek Lindner | a943cac | 2011-07-30 13:10:18 +0200 | [diff] [blame] | 2471 | return; |
| 2472 | } |
| 2473 | } |
| 2474 | } |
Antonio Quartulli | 3275e7c | 2012-03-16 18:03:28 +0100 | [diff] [blame] | 2475 | |
| 2476 | /* returns true whether we know that the client has moved from its old |
| 2477 | * originator to another one. This entry is kept is still kept for consistency |
| 2478 | * purposes |
| 2479 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2480 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 2481 | uint8_t *addr) |
Antonio Quartulli | 3275e7c | 2012-03-16 18:03:28 +0100 | [diff] [blame] | 2482 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 2483 | struct batadv_tt_global_entry *tt_global_entry; |
Antonio Quartulli | 3275e7c | 2012-03-16 18:03:28 +0100 | [diff] [blame] | 2484 | bool ret = false; |
| 2485 | |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2486 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
Antonio Quartulli | 3275e7c | 2012-03-16 18:03:28 +0100 | [diff] [blame] | 2487 | if (!tt_global_entry) |
| 2488 | goto out; |
| 2489 | |
Antonio Quartulli | c1d0743 | 2013-01-15 22:17:19 +1000 | [diff] [blame] | 2490 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
Sven Eckelmann | a513088 | 2012-05-16 20:23:16 +0200 | [diff] [blame] | 2491 | batadv_tt_global_entry_free_ref(tt_global_entry); |
Antonio Quartulli | 3275e7c | 2012-03-16 18:03:28 +0100 | [diff] [blame] | 2492 | out: |
| 2493 | return ret; |
| 2494 | } |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 2495 | |
Antonio Quartulli | 7c1fd91 | 2012-09-23 22:38:34 +0200 | [diff] [blame] | 2496 | /** |
| 2497 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming |
| 2498 | * @bat_priv: the bat priv with all the soft interface information |
| 2499 | * @addr: the MAC address of the local client to query |
| 2500 | * |
| 2501 | * Returns true if the local client is known to be roaming (it is not served by |
| 2502 | * this node anymore) or not. If yes, the client is still present in the table |
| 2503 | * to keep the latter consistent with the node TTVN |
| 2504 | */ |
| 2505 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, |
| 2506 | uint8_t *addr) |
| 2507 | { |
| 2508 | struct batadv_tt_local_entry *tt_local_entry; |
| 2509 | bool ret = false; |
| 2510 | |
| 2511 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
| 2512 | if (!tt_local_entry) |
| 2513 | goto out; |
| 2514 | |
| 2515 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
| 2516 | batadv_tt_local_entry_free_ref(tt_local_entry); |
| 2517 | out: |
| 2518 | return ret; |
Antonio Quartulli | 7c1fd91 | 2012-09-23 22:38:34 +0200 | [diff] [blame] | 2519 | } |
| 2520 | |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 2521 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
| 2522 | struct batadv_orig_node *orig_node, |
| 2523 | const unsigned char *addr) |
| 2524 | { |
| 2525 | bool ret = false; |
| 2526 | |
Antonio Quartulli | 1f36aeb | 2012-11-08 21:55:29 +0100 | [diff] [blame] | 2527 | /* if the originator is a backbone node (meaning it belongs to the same |
| 2528 | * LAN of this node) the temporary client must not be added because to |
| 2529 | * reach such destination the node must use the LAN instead of the mesh |
| 2530 | */ |
| 2531 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) |
| 2532 | goto out; |
| 2533 | |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 2534 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, |
| 2535 | BATADV_TT_CLIENT_TEMP, |
| 2536 | atomic_read(&orig_node->last_ttvn))) |
| 2537 | goto out; |
| 2538 | |
| 2539 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
| 2540 | "Added temporary global client (addr: %pM orig: %pM)\n", |
| 2541 | addr, orig_node->orig); |
| 2542 | ret = true; |
| 2543 | out: |
| 2544 | return ret; |
| 2545 | } |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 2546 | |
| 2547 | /** |
| 2548 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container |
| 2549 | * @bat_priv: the bat priv with all the soft interface information |
| 2550 | * @orig: the orig_node of the ogm |
| 2551 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) |
| 2552 | * @tvlv_value: tvlv buffer containing the gateway data |
| 2553 | * @tvlv_value_len: tvlv buffer length |
| 2554 | */ |
| 2555 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, |
| 2556 | struct batadv_orig_node *orig, |
| 2557 | uint8_t flags, |
| 2558 | void *tvlv_value, |
| 2559 | uint16_t tvlv_value_len) |
| 2560 | { |
| 2561 | struct batadv_tvlv_tt_data *tt_data; |
| 2562 | uint16_t num_entries; |
| 2563 | |
| 2564 | if (tvlv_value_len < sizeof(*tt_data)) |
| 2565 | return; |
| 2566 | |
| 2567 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; |
| 2568 | tvlv_value_len -= sizeof(*tt_data); |
| 2569 | |
| 2570 | num_entries = tvlv_value_len / batadv_tt_len(1); |
| 2571 | |
| 2572 | batadv_tt_update_orig(bat_priv, orig, |
| 2573 | (unsigned char *)(tt_data + 1), |
Antonio Quartulli | ced7293 | 2013-04-24 16:37:51 +0200 | [diff] [blame] | 2574 | num_entries, tt_data->ttvn, ntohl(tt_data->crc)); |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 2575 | } |
| 2576 | |
| 2577 | /** |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2578 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv |
| 2579 | * container |
| 2580 | * @bat_priv: the bat priv with all the soft interface information |
| 2581 | * @src: mac address of tt tvlv sender |
| 2582 | * @dst: mac address of tt tvlv recipient |
| 2583 | * @tvlv_value: tvlv buffer containing the tt data |
| 2584 | * @tvlv_value_len: tvlv buffer length |
| 2585 | * |
| 2586 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS |
| 2587 | * otherwise. |
| 2588 | */ |
| 2589 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, |
| 2590 | uint8_t *src, uint8_t *dst, |
| 2591 | void *tvlv_value, |
| 2592 | uint16_t tvlv_value_len) |
| 2593 | { |
| 2594 | struct batadv_tvlv_tt_data *tt_data; |
| 2595 | uint16_t num_entries; |
| 2596 | char tt_flag; |
| 2597 | bool ret; |
| 2598 | |
| 2599 | if (tvlv_value_len < sizeof(*tt_data)) |
| 2600 | return NET_RX_SUCCESS; |
| 2601 | |
| 2602 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; |
| 2603 | tvlv_value_len -= sizeof(*tt_data); |
| 2604 | |
| 2605 | num_entries = tvlv_value_len / batadv_tt_len(1); |
| 2606 | |
| 2607 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { |
| 2608 | case BATADV_TT_REQUEST: |
| 2609 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); |
| 2610 | |
| 2611 | /* If this node cannot provide a TT response the tt_request is |
| 2612 | * forwarded |
| 2613 | */ |
| 2614 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); |
| 2615 | if (!ret) { |
| 2616 | if (tt_data->flags & BATADV_TT_FULL_TABLE) |
| 2617 | tt_flag = 'F'; |
| 2618 | else |
| 2619 | tt_flag = '.'; |
| 2620 | |
| 2621 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
| 2622 | "Routing TT_REQUEST to %pM [%c]\n", |
| 2623 | dst, tt_flag); |
| 2624 | /* tvlv API will re-route the packet */ |
| 2625 | return NET_RX_DROP; |
| 2626 | } |
| 2627 | break; |
| 2628 | case BATADV_TT_RESPONSE: |
| 2629 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); |
| 2630 | |
| 2631 | if (batadv_is_my_mac(bat_priv, dst)) { |
| 2632 | batadv_handle_tt_response(bat_priv, tt_data, |
| 2633 | src, num_entries); |
| 2634 | return NET_RX_SUCCESS; |
| 2635 | } |
| 2636 | |
| 2637 | if (tt_data->flags & BATADV_TT_FULL_TABLE) |
| 2638 | tt_flag = 'F'; |
| 2639 | else |
| 2640 | tt_flag = '.'; |
| 2641 | |
| 2642 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
| 2643 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); |
| 2644 | |
| 2645 | /* tvlv API will re-route the packet */ |
| 2646 | return NET_RX_DROP; |
| 2647 | } |
| 2648 | |
| 2649 | return NET_RX_SUCCESS; |
| 2650 | } |
| 2651 | |
| 2652 | /** |
Marek Lindner | 122edaa | 2013-04-23 21:40:03 +0800 | [diff] [blame] | 2653 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container |
| 2654 | * @bat_priv: the bat priv with all the soft interface information |
| 2655 | * @src: mac address of tt tvlv sender |
| 2656 | * @dst: mac address of tt tvlv recipient |
| 2657 | * @tvlv_value: tvlv buffer containing the tt data |
| 2658 | * @tvlv_value_len: tvlv buffer length |
| 2659 | * |
| 2660 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS |
| 2661 | * otherwise. |
| 2662 | */ |
| 2663 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, |
| 2664 | uint8_t *src, uint8_t *dst, |
| 2665 | void *tvlv_value, |
| 2666 | uint16_t tvlv_value_len) |
| 2667 | { |
| 2668 | struct batadv_tvlv_roam_adv *roaming_adv; |
| 2669 | struct batadv_orig_node *orig_node = NULL; |
| 2670 | |
| 2671 | /* If this node is not the intended recipient of the |
| 2672 | * roaming advertisement the packet is forwarded |
| 2673 | * (the tvlv API will re-route the packet). |
| 2674 | */ |
| 2675 | if (!batadv_is_my_mac(bat_priv, dst)) |
| 2676 | return NET_RX_DROP; |
| 2677 | |
| 2678 | /* check if it is a backbone gateway. we don't accept |
| 2679 | * roaming advertisement from it, as it has the same |
| 2680 | * entries as we have. |
| 2681 | */ |
| 2682 | if (batadv_bla_is_backbone_gw_orig(bat_priv, src)) |
| 2683 | goto out; |
| 2684 | |
| 2685 | if (tvlv_value_len < sizeof(*roaming_adv)) |
| 2686 | goto out; |
| 2687 | |
| 2688 | orig_node = batadv_orig_hash_find(bat_priv, src); |
| 2689 | if (!orig_node) |
| 2690 | goto out; |
| 2691 | |
| 2692 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); |
| 2693 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; |
| 2694 | |
| 2695 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
| 2696 | "Received ROAMING_ADV from %pM (client %pM)\n", |
| 2697 | src, roaming_adv->client); |
| 2698 | |
| 2699 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, |
| 2700 | BATADV_TT_CLIENT_ROAM, |
| 2701 | atomic_read(&orig_node->last_ttvn) + 1); |
| 2702 | |
| 2703 | out: |
| 2704 | if (orig_node) |
| 2705 | batadv_orig_node_free_ref(orig_node); |
| 2706 | return NET_RX_SUCCESS; |
| 2707 | } |
| 2708 | |
| 2709 | /** |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 2710 | * batadv_tt_init - initialise the translation table internals |
| 2711 | * @bat_priv: the bat priv with all the soft interface information |
| 2712 | * |
| 2713 | * Return 0 on success or negative error number in case of failure. |
| 2714 | */ |
| 2715 | int batadv_tt_init(struct batadv_priv *bat_priv) |
| 2716 | { |
| 2717 | int ret; |
| 2718 | |
| 2719 | ret = batadv_tt_local_init(bat_priv); |
| 2720 | if (ret < 0) |
| 2721 | return ret; |
| 2722 | |
| 2723 | ret = batadv_tt_global_init(bat_priv); |
| 2724 | if (ret < 0) |
| 2725 | return ret; |
| 2726 | |
| 2727 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, |
Marek Lindner | 335fbe0 | 2013-04-23 21:40:02 +0800 | [diff] [blame] | 2728 | batadv_tt_tvlv_unicast_handler_v1, |
| 2729 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 2730 | |
Marek Lindner | 122edaa | 2013-04-23 21:40:03 +0800 | [diff] [blame] | 2731 | batadv_tvlv_handler_register(bat_priv, NULL, |
| 2732 | batadv_roam_tvlv_unicast_handler_v1, |
| 2733 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); |
| 2734 | |
Marek Lindner | e1bf0c1 | 2013-04-23 21:40:01 +0800 | [diff] [blame] | 2735 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
| 2736 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
| 2737 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); |
| 2738 | |
| 2739 | return 1; |
| 2740 | } |