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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 | void can_init_proc(void); |
112 | void can_remove_proc(void); |
113 | 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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