linux/net/can/af_can.h
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   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
  51struct receiver {
  52        struct hlist_node list;
  53        struct rcu_head rcu;
  54        canid_t can_id;
  55        canid_t mask;
  56        unsigned long matches;
  57        void (*func)(struct sk_buff *, void *);
  58        void *data;
  59        char *ident;
  60};
  61
  62enum { RX_ERR, RX_ALL, RX_FIL, RX_INV, RX_EFF, RX_MAX };
  63
  64/* per device receive filters linked at dev->ml_priv */
  65struct dev_rcv_lists {
  66        struct hlist_head rx[RX_MAX];
  67        struct hlist_head rx_sff[0x800];
  68        int remove_on_zero_entries;
  69        int entries;
  70};
  71
  72/* statistic structures */
  73
  74/* can be reset e.g. by can_init_stats() */
  75struct s_stats {
  76        unsigned long jiffies_init;
  77
  78        unsigned long rx_frames;
  79        unsigned long tx_frames;
  80        unsigned long matches;
  81
  82        unsigned long total_rx_rate;
  83        unsigned long total_tx_rate;
  84        unsigned long total_rx_match_ratio;
  85
  86        unsigned long current_rx_rate;
  87        unsigned long current_tx_rate;
  88        unsigned long current_rx_match_ratio;
  89
  90        unsigned long max_rx_rate;
  91        unsigned long max_tx_rate;
  92        unsigned long max_rx_match_ratio;
  93
  94        unsigned long rx_frames_delta;
  95        unsigned long tx_frames_delta;
  96        unsigned long matches_delta;
  97};
  98
  99/* persistent statistics */
 100struct s_pstats {
 101        unsigned long stats_reset;
 102        unsigned long user_reset;
 103        unsigned long rcv_entries;
 104        unsigned long rcv_entries_max;
 105};
 106
 107/* receive filters subscribed for 'all' CAN devices */
 108extern struct dev_rcv_lists can_rx_alldev_list;
 109
 110/* function prototypes for the CAN networklayer procfs (proc.c) */
 111extern void can_init_proc(void);
 112extern void can_remove_proc(void);
 113extern void can_stat_update(unsigned long data);
 114
 115/* structures and variables from af_can.c needed in proc.c for reading */
 116extern struct timer_list can_stattimer;    /* timer for statistics update */
 117extern struct s_stats    can_stats;        /* packet statistics */
 118extern struct s_pstats   can_pstats;       /* receive list statistics */
 119extern struct hlist_head can_rx_dev_list;  /* rx dispatcher structures */
 120
 121#endif /* AF_CAN_H */
 122
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