source: src/linux/universal/linux-3.18/net/can/af_can.h @ 31869

Last change on this file since 31869 was 31869, checked in by brainslayer, 3 months ago

update

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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        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
67enum { RX_ERR, RX_ALL, RX_FIL, RX_INV, RX_MAX };
68
69/* per device receive filters linked at dev->ml_priv */
70struct 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() */
81struct 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 */
106struct 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 */
114extern struct dev_rcv_lists can_rx_alldev_list;
115
116/* function prototypes for the CAN networklayer procfs (proc.c) */
117void can_init_proc(void);
118void can_remove_proc(void);
119void can_stat_update(unsigned long data);
120
121/* structures and variables from af_can.c needed in proc.c for reading */
122extern struct timer_list can_stattimer;    /* timer for statistics update */
123extern struct s_stats    can_stats;        /* packet statistics */
124extern struct s_pstats   can_pstats;       /* receive list statistics */
125extern struct hlist_head can_rx_dev_list;  /* rx dispatcher structures */
126
127#endif /* AF_CAN_H */
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