1 /* 2 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Volkswagen nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * Alternatively, provided that this notice is retained in full, this 18 * software may be distributed under the terms of the GNU General 19 * Public License ("GPL") version 2, in which case the provisions of the 20 * GPL apply INSTEAD OF those given above. 21 * 22 * The provided data structures and external interfaces from this code 23 * are not restricted to be used by modules with a GPL compatible license. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 36 * DAMAGE. 37 * 38 * Send feedback to <socketcan-users@lists.berlios.de> 39 * 40 */ 41 42 #ifndef AF_CAN_H 43 #define AF_CAN_H 44 45 #include <linux/skbuff.h> 46 #include <linux/netdevice.h> 47 #include <linux/list.h> 48 #include <linux/rcupdate.h> 49 #include <linux/can.h> 50 51 /* af_can rx dispatcher structures */ 52 53 struct receiver { 54 struct hlist_node list; 55 struct rcu_head rcu; 56 canid_t can_id; 57 canid_t mask; 58 unsigned long matches; 59 void (*func)(struct sk_buff *, void *); 60 void *data; 61 char *ident; 62 }; 63 64 enum { RX_ERR, RX_ALL, RX_FIL, RX_INV, RX_EFF, RX_MAX }; 65 66 /* per device receive filters linked at dev->ml_priv */ 67 struct dev_rcv_lists { 68 struct hlist_head rx[RX_MAX]; 69 struct hlist_head rx_sff[0x800]; 70 int remove_on_zero_entries; 71 int entries; 72 }; 73 74 /* statistic structures */ 75 76 /* can be reset e.g. by can_init_stats() */ 77 struct s_stats { 78 unsigned long jiffies_init; 79 80 unsigned long rx_frames; 81 unsigned long tx_frames; 82 unsigned long matches; 83 84 unsigned long total_rx_rate; 85 unsigned long total_tx_rate; 86 unsigned long total_rx_match_ratio; 87 88 unsigned long current_rx_rate; 89 unsigned long current_tx_rate; 90 unsigned long current_rx_match_ratio; 91 92 unsigned long max_rx_rate; 93 unsigned long max_tx_rate; 94 unsigned long max_rx_match_ratio; 95 96 unsigned long rx_frames_delta; 97 unsigned long tx_frames_delta; 98 unsigned long matches_delta; 99 }; 100 101 /* persistent statistics */ 102 struct s_pstats { 103 unsigned long stats_reset; 104 unsigned long user_reset; 105 unsigned long rcv_entries; 106 unsigned long rcv_entries_max; 107 }; 108 109 /* function prototypes for the CAN networklayer procfs (proc.c) */ 110 extern void can_init_proc(void); 111 extern void can_remove_proc(void); 112 extern void can_stat_update(unsigned long data); 113 114 /* structures and variables from af_can.c needed in proc.c for reading */ 115 extern struct timer_list can_stattimer; /* timer for statistics update */ 116 extern struct s_stats can_stats; /* packet statistics */ 117 extern struct s_pstats can_pstats; /* receive list statistics */ 118 extern struct hlist_head can_rx_dev_list; /* rx dispatcher structures */ 119 120 #endif /* AF_CAN_H */ 121