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 */ 39 40 #ifndef AF_CAN_H 41 #define AF_CAN_H 42 43 #include <linux/skbuff.h> 44 #include <linux/netdevice.h> 45 #include <linux/list.h> 46 #include <linux/rcupdate.h> 47 #include <linux/can.h> 48 49 /* af_can rx dispatcher structures */ 50 51 struct receiver { 52 struct hlist_node list; 53 canid_t can_id; 54 canid_t mask; 55 unsigned long matches; 56 void (*func)(struct sk_buff *, void *); 57 void *data; 58 char *ident; 59 struct sock *sk; 60 struct rcu_head rcu; 61 }; 62 63 #define CAN_SFF_RCV_ARRAY_SZ (1 << CAN_SFF_ID_BITS) 64 #define CAN_EFF_RCV_HASH_BITS 10 65 #define CAN_EFF_RCV_ARRAY_SZ (1 << CAN_EFF_RCV_HASH_BITS) 66 67 enum { RX_ERR, RX_ALL, RX_FIL, RX_INV, RX_MAX }; 68 69 /* per device receive filters linked at dev->ml_priv */ 70 struct dev_rcv_lists { 71 struct hlist_head rx[RX_MAX]; 72 struct hlist_head rx_sff[CAN_SFF_RCV_ARRAY_SZ]; 73 struct hlist_head rx_eff[CAN_EFF_RCV_ARRAY_SZ]; 74 int remove_on_zero_entries; 75 int entries; 76 }; 77 78 /* statistic structures */ 79 80 /* can be reset e.g. by can_init_stats() */ 81 struct s_stats { 82 unsigned long jiffies_init; 83 84 unsigned long rx_frames; 85 unsigned long tx_frames; 86 unsigned long matches; 87 88 unsigned long total_rx_rate; 89 unsigned long total_tx_rate; 90 unsigned long total_rx_match_ratio; 91 92 unsigned long current_rx_rate; 93 unsigned long current_tx_rate; 94 unsigned long current_rx_match_ratio; 95 96 unsigned long max_rx_rate; 97 unsigned long max_tx_rate; 98 unsigned long max_rx_match_ratio; 99 100 unsigned long rx_frames_delta; 101 unsigned long tx_frames_delta; 102 unsigned long matches_delta; 103 }; 104 105 /* persistent statistics */ 106 struct s_pstats { 107 unsigned long stats_reset; 108 unsigned long user_reset; 109 unsigned long rcv_entries; 110 unsigned long rcv_entries_max; 111 }; 112 113 /* receive filters subscribed for 'all' CAN devices */ 114 extern struct dev_rcv_lists can_rx_alldev_list; 115 116 /* function prototypes for the CAN networklayer procfs (proc.c) */ 117 void can_init_proc(void); 118 void can_remove_proc(void); 119 void can_stat_update(unsigned long data); 120 121 /* structures and variables from af_can.c needed in proc.c for reading */ 122 extern struct timer_list can_stattimer; /* timer for statistics update */ 123 extern struct s_stats can_stats; /* packet statistics */ 124 extern struct s_pstats can_pstats; /* receive list statistics */ 125 extern struct hlist_head can_rx_dev_list; /* rx dispatcher structures */ 126 127 #endif /* AF_CAN_H */ 128