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TOMOYO Linux Cross Reference
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 
 51 struct 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 
 62 enum { RX_ERR, RX_ALL, RX_FIL, RX_INV, RX_EFF, RX_MAX };
 63 
 64 /* per device receive filters linked at dev->ml_priv */
 65 struct 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() */
 75 struct 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 */
100 struct 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 */
108 extern struct dev_rcv_lists can_rx_alldev_list;
109 
110 /* function prototypes for the CAN networklayer procfs (proc.c) */
111 extern void can_init_proc(void);
112 extern void can_remove_proc(void);
113 extern void can_stat_update(unsigned long data);
114 
115 /* structures and variables from af_can.c needed in proc.c for reading */
116 extern struct timer_list can_stattimer;    /* timer for statistics update */
117 extern struct s_stats    can_stats;        /* packet statistics */
118 extern struct s_pstats   can_pstats;       /* receive list statistics */
119 extern struct hlist_head can_rx_dev_list;  /* rx dispatcher structures */
120 
121 #endif /* AF_CAN_H */
122 

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