975987e701
In j1939 we need our own struct sock::sk_destruct callback. Export the
generic af_can can_sock_destruct() that allows us to chain-call it.
Fixes: 9d71dd0c70 ("can: add support of SAE J1939 protocol")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
71 lines
2 KiB
C
71 lines
2 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
|
|
/*
|
|
* linux/can/core.h
|
|
*
|
|
* Protoypes and definitions for CAN protocol modules using the PF_CAN core
|
|
*
|
|
* Authors: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
|
|
* Urs Thuermann <urs.thuermann@volkswagen.de>
|
|
* Copyright (c) 2002-2017 Volkswagen Group Electronic Research
|
|
* All rights reserved.
|
|
*
|
|
*/
|
|
|
|
#ifndef _CAN_CORE_H
|
|
#define _CAN_CORE_H
|
|
|
|
#include <linux/can.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/netdevice.h>
|
|
|
|
#define CAN_VERSION "20170425"
|
|
|
|
/* increment this number each time you change some user-space interface */
|
|
#define CAN_ABI_VERSION "9"
|
|
|
|
#define CAN_VERSION_STRING "rev " CAN_VERSION " abi " CAN_ABI_VERSION
|
|
|
|
#define DNAME(dev) ((dev) ? (dev)->name : "any")
|
|
|
|
/**
|
|
* struct can_proto - CAN protocol structure
|
|
* @type: type argument in socket() syscall, e.g. SOCK_DGRAM.
|
|
* @protocol: protocol number in socket() syscall.
|
|
* @ops: pointer to struct proto_ops for sock->ops.
|
|
* @prot: pointer to struct proto structure.
|
|
*/
|
|
struct can_proto {
|
|
int type;
|
|
int protocol;
|
|
const struct proto_ops *ops;
|
|
struct proto *prot;
|
|
};
|
|
|
|
/* required_size
|
|
* macro to find the minimum size of a struct
|
|
* that includes a requested member
|
|
*/
|
|
#define CAN_REQUIRED_SIZE(struct_type, member) \
|
|
(offsetof(typeof(struct_type), member) + \
|
|
sizeof(((typeof(struct_type) *)(NULL))->member))
|
|
|
|
/* function prototypes for the CAN networklayer core (af_can.c) */
|
|
|
|
extern int can_proto_register(const struct can_proto *cp);
|
|
extern void can_proto_unregister(const struct can_proto *cp);
|
|
|
|
int can_rx_register(struct net *net, struct net_device *dev,
|
|
canid_t can_id, canid_t mask,
|
|
void (*func)(struct sk_buff *, void *),
|
|
void *data, char *ident, struct sock *sk);
|
|
|
|
extern void can_rx_unregister(struct net *net, struct net_device *dev,
|
|
canid_t can_id, canid_t mask,
|
|
void (*func)(struct sk_buff *, void *),
|
|
void *data);
|
|
|
|
extern int can_send(struct sk_buff *skb, int loop);
|
|
void can_sock_destruct(struct sock *sk);
|
|
|
|
#endif /* !_CAN_CORE_H */
|