Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1 | /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 2 | * |
| 3 | * Marek Lindner, Simon Wunderlich |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of version 2 of the GNU General Public |
| 7 | * License as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 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 | #ifndef _NET_BATMAN_ADV_MAIN_H_ |
| 21 | #define _NET_BATMAN_ADV_MAIN_H_ |
| 22 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 23 | #define BATADV_DRIVER_AUTHOR "Marek Lindner <lindner_marek@yahoo.de>, " \ |
| 24 | "Simon Wunderlich <siwu@hrz.tu-chemnitz.de>" |
| 25 | #define BATADV_DRIVER_DESC "B.A.T.M.A.N. advanced" |
| 26 | #define BATADV_DRIVER_DEVICE "batman-adv" |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 27 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 28 | #ifndef BATADV_SOURCE_VERSION |
Sven Eckelmann | fa4f0af | 2012-08-19 21:48:25 +0200 | [diff] [blame] | 29 | #define BATADV_SOURCE_VERSION "2012.4.0" |
Sven Eckelmann | 44c4349 | 2011-07-05 10:42:51 +0200 | [diff] [blame] | 30 | #endif |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 31 | |
| 32 | /* B.A.T.M.A.N. parameters */ |
| 33 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 34 | #define BATADV_TQ_MAX_VALUE 255 |
| 35 | #define BATADV_JITTER 20 |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 36 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 37 | /* Time To Live of broadcast messages */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 38 | #define BATADV_TTL 50 |
Sven Eckelmann | 6e215fd | 2011-05-08 12:45:45 +0200 | [diff] [blame] | 39 | |
| 40 | /* purge originators after time in seconds if no valid packet comes in |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 41 | * -> TODO: check influence on BATADV_TQ_LOCAL_WINDOW_SIZE |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 42 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 43 | #define BATADV_PURGE_TIMEOUT 200000 /* 200 seconds */ |
Antonio Quartulli | a51fb9b | 2012-07-01 19:07:31 +0200 | [diff] [blame] | 44 | #define BATADV_TT_LOCAL_TIMEOUT 3600000 /* in milliseconds */ |
| 45 | #define BATADV_TT_CLIENT_ROAM_TIMEOUT 600000 /* in milliseconds */ |
Antonio Quartulli | 30cfd02 | 2012-07-05 23:38:29 +0200 | [diff] [blame] | 46 | #define BATADV_TT_CLIENT_TEMP_TIMEOUT 600000 /* in milliseconds */ |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 47 | /* sliding packet range of received originator messages in sequence numbers |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 48 | * (should be a multiple of our word size) |
| 49 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 50 | #define BATADV_TQ_LOCAL_WINDOW_SIZE 64 |
Antonio Quartulli | a51fb9b | 2012-07-01 19:07:31 +0200 | [diff] [blame] | 51 | /* milliseconds we have to keep pending tt_req */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 52 | #define BATADV_TT_REQUEST_TIMEOUT 3000 |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 53 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 54 | #define BATADV_TQ_GLOBAL_WINDOW_SIZE 5 |
| 55 | #define BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM 1 |
| 56 | #define BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM 1 |
| 57 | #define BATADV_TQ_TOTAL_BIDRECT_LIMIT 1 |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 58 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 59 | /* number of OGMs sent with the last tt diff */ |
| 60 | #define BATADV_TT_OGM_APPEND_MAX 3 |
Antonio Quartulli | a73105b | 2011-04-27 14:27:44 +0200 | [diff] [blame] | 61 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 62 | /* Time in which a client can roam at most ROAMING_MAX_COUNT times in |
Antonio Quartulli | a51fb9b | 2012-07-01 19:07:31 +0200 | [diff] [blame] | 63 | * milliseconds |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 64 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 65 | #define BATADV_ROAMING_MAX_TIME 20000 |
| 66 | #define BATADV_ROAMING_MAX_COUNT 5 |
Antonio Quartulli | cc47f66 | 2011-04-27 14:27:57 +0200 | [diff] [blame] | 67 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 68 | #define BATADV_NO_FLAGS 0 |
Marek Lindner | ecbd532 | 2011-06-09 17:13:09 +0200 | [diff] [blame] | 69 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 70 | #define BATADV_NULL_IFINDEX 0 /* dummy ifindex used to avoid iface checks */ |
Antonio Quartulli | bc27908 | 2011-07-07 15:35:35 +0200 | [diff] [blame] | 71 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 72 | #define BATADV_NUM_WORDS BITS_TO_LONGS(BATADV_TQ_LOCAL_WINDOW_SIZE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 73 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 74 | #define BATADV_LOG_BUF_LEN 8192 /* has to be a power of 2 */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 75 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 76 | #define BATADV_VIS_INTERVAL 5000 /* 5 seconds */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 77 | |
Sven Eckelmann | 6e215fd | 2011-05-08 12:45:45 +0200 | [diff] [blame] | 78 | /* how much worse secondary interfaces may be to be considered as bonding |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 79 | * candidates |
| 80 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 81 | #define BATADV_BONDING_TQ_THRESHOLD 50 |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 82 | |
Sven Eckelmann | 6e215fd | 2011-05-08 12:45:45 +0200 | [diff] [blame] | 83 | /* should not be bigger than 512 bytes or change the size of |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 84 | * forw_packet->direct_link_flags |
| 85 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 86 | #define BATADV_MAX_AGGREGATION_BYTES 512 |
| 87 | #define BATADV_MAX_AGGREGATION_MS 100 |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 88 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 89 | #define BATADV_BLA_PERIOD_LENGTH 10000 /* 10 seconds */ |
| 90 | #define BATADV_BLA_BACKBONE_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 3) |
| 91 | #define BATADV_BLA_CLAIM_TIMEOUT (BATADV_BLA_PERIOD_LENGTH * 10) |
Simon Wunderlich | fe2da6f | 2012-01-22 20:00:24 +0100 | [diff] [blame] | 92 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 93 | #define BATADV_DUPLIST_SIZE 16 |
| 94 | #define BATADV_DUPLIST_TIMEOUT 500 /* 500 ms */ |
Sven Eckelmann | 6e215fd | 2011-05-08 12:45:45 +0200 | [diff] [blame] | 95 | /* don't reset again within 30 seconds */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 96 | #define BATADV_RESET_PROTECTION_MS 30000 |
| 97 | #define BATADV_EXPECTED_SEQNO_RANGE 65536 |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 98 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 99 | enum batadv_mesh_state { |
| 100 | BATADV_MESH_INACTIVE, |
| 101 | BATADV_MESH_ACTIVE, |
| 102 | BATADV_MESH_DEACTIVATING, |
Sven Eckelmann | e8958db | 2011-06-04 11:26:00 +0200 | [diff] [blame] | 103 | }; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 104 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 105 | #define BATADV_BCAST_QUEUE_LEN 256 |
| 106 | #define BATADV_BATMAN_QUEUE_LEN 256 |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 107 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 108 | enum batadv_uev_action { |
| 109 | BATADV_UEV_ADD = 0, |
| 110 | BATADV_UEV_DEL, |
| 111 | BATADV_UEV_CHANGE, |
Antonio Quartulli | c6bda68 | 2011-04-26 18:26:01 +0200 | [diff] [blame] | 112 | }; |
| 113 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 114 | enum batadv_uev_type { |
| 115 | BATADV_UEV_GW = 0, |
Antonio Quartulli | c6bda68 | 2011-04-26 18:26:01 +0200 | [diff] [blame] | 116 | }; |
| 117 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 118 | #define BATADV_GW_THRESHOLD 50 |
Antonio Quartulli | 43676ab5 | 2011-04-26 21:31:45 +0200 | [diff] [blame] | 119 | |
Sven Eckelmann | 21a1236 | 2012-03-07 09:07:46 +0100 | [diff] [blame] | 120 | /* Debug Messages */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 121 | #ifdef pr_fmt |
| 122 | #undef pr_fmt |
| 123 | #endif |
Sven Eckelmann | 6e215fd | 2011-05-08 12:45:45 +0200 | [diff] [blame] | 124 | /* Append 'batman-adv: ' before kernel messages */ |
| 125 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 126 | |
Sven Eckelmann | 21a1236 | 2012-03-07 09:07:46 +0100 | [diff] [blame] | 127 | /* Kernel headers */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 128 | |
| 129 | #include <linux/mutex.h> /* mutex */ |
| 130 | #include <linux/module.h> /* needed by all modules */ |
| 131 | #include <linux/netdevice.h> /* netdevice */ |
Antonio Quartulli | 015758d | 2011-07-09 17:52:13 +0200 | [diff] [blame] | 132 | #include <linux/etherdevice.h> /* ethernet address classification */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 133 | #include <linux/if_ether.h> /* ethernet header */ |
| 134 | #include <linux/poll.h> /* poll_table */ |
| 135 | #include <linux/kthread.h> /* kernel threads */ |
| 136 | #include <linux/pkt_sched.h> /* schedule types */ |
| 137 | #include <linux/workqueue.h> /* workqueue */ |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 138 | #include <linux/percpu.h> |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 139 | #include <linux/slab.h> |
| 140 | #include <net/sock.h> /* struct sock */ |
| 141 | #include <linux/jiffies.h> |
| 142 | #include <linux/seq_file.h> |
| 143 | #include "types.h" |
| 144 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 145 | extern char batadv_routing_algo[]; |
| 146 | extern struct list_head batadv_hardif_list; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 147 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 148 | extern unsigned char batadv_broadcast_addr[]; |
| 149 | extern struct workqueue_struct *batadv_event_workqueue; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 150 | |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 151 | int batadv_mesh_init(struct net_device *soft_iface); |
| 152 | void batadv_mesh_free(struct net_device *soft_iface); |
| 153 | void batadv_inc_module_count(void); |
| 154 | void batadv_dec_module_count(void); |
| 155 | int batadv_is_my_mac(const uint8_t *addr); |
Marek Lindner | 30da63a | 2012-08-03 17:15:46 +0200 | [diff] [blame] | 156 | struct batadv_hard_iface * |
| 157 | batadv_seq_print_text_primary_if_get(struct seq_file *seq); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 158 | int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev, |
| 159 | struct packet_type *ptype, |
| 160 | struct net_device *orig_dev); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 161 | int |
| 162 | batadv_recv_handler_register(uint8_t packet_type, |
| 163 | int (*recv_handler)(struct sk_buff *, |
| 164 | struct batadv_hard_iface *)); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 165 | void batadv_recv_handler_unregister(uint8_t packet_type); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 166 | int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops); |
| 167 | int batadv_algo_select(struct batadv_priv *bat_priv, char *name); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 168 | int batadv_algo_seq_print_text(struct seq_file *seq, void *offset); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 169 | |
Sven Eckelmann | 8de47de | 2012-07-08 16:32:09 +0200 | [diff] [blame] | 170 | /* all messages related to routing / flooding / broadcasting / etc */ |
| 171 | enum batadv_dbg_level { |
| 172 | BATADV_DBG_BATMAN = BIT(0), |
| 173 | BATADV_DBG_ROUTES = BIT(1), /* route added / changed / deleted */ |
| 174 | BATADV_DBG_TT = BIT(2), /* translation table operations */ |
| 175 | BATADV_DBG_BLA = BIT(3), /* bridge loop avoidance */ |
| 176 | BATADV_DBG_ALL = 15, |
| 177 | }; |
| 178 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 179 | #ifdef CONFIG_BATMAN_ADV_DEBUG |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 180 | int batadv_debug_log(struct batadv_priv *bat_priv, const char *fmt, ...) |
Sven Eckelmann | 40a072d | 2012-05-12 02:09:23 +0200 | [diff] [blame] | 181 | __printf(2, 3); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 182 | |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 183 | #define batadv_dbg(type, bat_priv, fmt, arg...) \ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 184 | do { \ |
| 185 | if (atomic_read(&bat_priv->log_level) & type) \ |
Sven Eckelmann | 40a072d | 2012-05-12 02:09:23 +0200 | [diff] [blame] | 186 | batadv_debug_log(bat_priv, fmt, ## arg);\ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 187 | } \ |
| 188 | while (0) |
| 189 | #else /* !CONFIG_BATMAN_ADV_DEBUG */ |
Sven Eckelmann | d3a547b | 2011-05-14 23:14:46 +0200 | [diff] [blame] | 190 | __printf(3, 4) |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 191 | static inline void batadv_dbg(int type __always_unused, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 192 | struct batadv_priv *bat_priv __always_unused, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 193 | const char *fmt __always_unused, ...) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 194 | { |
| 195 | } |
| 196 | #endif |
| 197 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 198 | #define batadv_info(net_dev, fmt, arg...) \ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 199 | do { \ |
| 200 | struct net_device *_netdev = (net_dev); \ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 201 | struct batadv_priv *_batpriv = netdev_priv(_netdev); \ |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 202 | batadv_dbg(BATADV_DBG_ALL, _batpriv, fmt, ## arg); \ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 203 | pr_info("%s: " fmt, _netdev->name, ## arg); \ |
| 204 | } while (0) |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 205 | #define batadv_err(net_dev, fmt, arg...) \ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 206 | do { \ |
| 207 | struct net_device *_netdev = (net_dev); \ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 208 | struct batadv_priv *_batpriv = netdev_priv(_netdev); \ |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 209 | batadv_dbg(BATADV_DBG_ALL, _batpriv, fmt, ## arg); \ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 210 | pr_err("%s: " fmt, _netdev->name, ## arg); \ |
| 211 | } while (0) |
| 212 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 213 | /* returns 1 if they are the same ethernet addr |
Marek Lindner | 39901e7 | 2011-02-18 12:28:08 +0000 | [diff] [blame] | 214 | * |
| 215 | * note: can't use compare_ether_addr() as it requires aligned memory |
| 216 | */ |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 217 | static inline int batadv_compare_eth(const void *data1, const void *data2) |
Marek Lindner | 39901e7 | 2011-02-18 12:28:08 +0000 | [diff] [blame] | 218 | { |
| 219 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); |
| 220 | } |
| 221 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 222 | /** |
| 223 | * has_timed_out - compares current time (jiffies) and timestamp + timeout |
Martin Hundebøll | a04ccd5 | 2011-12-08 13:32:41 +0100 | [diff] [blame] | 224 | * @timestamp: base value to compare with (in jiffies) |
| 225 | * @timeout: added to base value before comparing (in milliseconds) |
| 226 | * |
| 227 | * Returns true if current time is after timestamp + timeout |
| 228 | */ |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 229 | static inline bool batadv_has_timed_out(unsigned long timestamp, |
| 230 | unsigned int timeout) |
Martin Hundebøll | a04ccd5 | 2011-12-08 13:32:41 +0100 | [diff] [blame] | 231 | { |
| 232 | return time_is_before_jiffies(timestamp + msecs_to_jiffies(timeout)); |
| 233 | } |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 234 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 235 | #define batadv_atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0) |
Antonio Quartulli | 5f657ec | 2011-04-20 09:52:56 +0200 | [diff] [blame] | 236 | |
Antonio Quartulli | f5d33d3 | 2011-05-18 09:20:50 +0200 | [diff] [blame] | 237 | /* Returns the smallest signed integer in two's complement with the sizeof x */ |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 238 | #define batadv_smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u))) |
Antonio Quartulli | f5d33d3 | 2011-05-18 09:20:50 +0200 | [diff] [blame] | 239 | |
| 240 | /* Checks if a sequence number x is a predecessor/successor of y. |
| 241 | * they handle overflows/underflows and can correctly check for a |
| 242 | * predecessor/successor unless the variable sequence number has grown by |
| 243 | * more then 2**(bitwidth(x)-1)-1. |
| 244 | * This means that for a uint8_t with the maximum value 255, it would think: |
| 245 | * - when adding nothing - it is neither a predecessor nor a successor |
| 246 | * - before adding more than 127 to the starting value - it is a predecessor, |
| 247 | * - when adding 128 - it is neither a predecessor nor a successor, |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 248 | * - after adding more than 127 to the starting value - it is a successor |
| 249 | */ |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 250 | #define batadv_seq_before(x, y) ({typeof(x) _d1 = (x); \ |
| 251 | typeof(y) _d2 = (y); \ |
| 252 | typeof(x) _dummy = (_d1 - _d2); \ |
| 253 | (void) (&_d1 == &_d2); \ |
| 254 | _dummy > batadv_smallest_signed_int(_dummy); }) |
| 255 | #define batadv_seq_after(x, y) batadv_seq_before(y, x) |
Antonio Quartulli | f5d33d3 | 2011-05-18 09:20:50 +0200 | [diff] [blame] | 256 | |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 257 | /* Stop preemption on local cpu while incrementing the counter */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 258 | static inline void batadv_add_counter(struct batadv_priv *bat_priv, size_t idx, |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 259 | size_t count) |
| 260 | { |
| 261 | int cpu = get_cpu(); |
| 262 | per_cpu_ptr(bat_priv->bat_counters, cpu)[idx] += count; |
| 263 | put_cpu(); |
| 264 | } |
| 265 | |
| 266 | #define batadv_inc_counter(b, i) batadv_add_counter(b, i, 1) |
| 267 | |
| 268 | /* Sum and return the cpu-local counters for index 'idx' */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 269 | static inline uint64_t batadv_sum_counter(struct batadv_priv *bat_priv, |
| 270 | size_t idx) |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 271 | { |
Marek Lindner | 0c5e45b6 | 2012-06-23 11:46:05 +0200 | [diff] [blame] | 272 | uint64_t *counters, sum = 0; |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 273 | int cpu; |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 274 | |
| 275 | for_each_possible_cpu(cpu) { |
| 276 | counters = per_cpu_ptr(bat_priv->bat_counters, cpu); |
| 277 | sum += counters[idx]; |
| 278 | } |
| 279 | |
| 280 | return sum; |
| 281 | } |
| 282 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 283 | #endif /* _NET_BATMAN_ADV_MAIN_H_ */ |