forked from luck/tmp_suning_uos_patched
1fa17d4ba4
The AF_CAN core delivered always cloned sk_buffs to the AF_CAN protocols, although this was _only_ needed by the can-raw protocol. With this (additionally documented) change, the AF_CAN core calls the callback functions of the registered AF_CAN protocols with the original (uncloned) sk_buff pointer and let's the can-raw protocol do the skb_clone() itself which omits all unneeded skb_clone() calls for other AF_CAN protocols. Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/*
|
|
* 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) 2002-2007 Volkswagen Group Electronic Research
|
|
* All rights reserved.
|
|
*
|
|
* Send feedback to <socketcan-users@lists.berlios.de>
|
|
*
|
|
*/
|
|
|
|
#ifndef CAN_CORE_H
|
|
#define CAN_CORE_H
|
|
|
|
#include <linux/can.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/netdevice.h>
|
|
|
|
#define CAN_VERSION "20090105"
|
|
|
|
/* increment this number each time you change some user-space interface */
|
|
#define CAN_ABI_VERSION "8"
|
|
|
|
#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.
|
|
* @capability: capability needed to open the socket, or -1 for no restriction.
|
|
* @ops: pointer to struct proto_ops for sock->ops.
|
|
* @prot: pointer to struct proto structure.
|
|
*/
|
|
struct can_proto {
|
|
int type;
|
|
int protocol;
|
|
int capability;
|
|
struct proto_ops *ops;
|
|
struct proto *prot;
|
|
};
|
|
|
|
/* function prototypes for the CAN networklayer core (af_can.c) */
|
|
|
|
extern int can_proto_register(struct can_proto *cp);
|
|
extern void can_proto_unregister(struct can_proto *cp);
|
|
|
|
extern int can_rx_register(struct net_device *dev, canid_t can_id,
|
|
canid_t mask,
|
|
void (*func)(struct sk_buff *, void *),
|
|
void *data, char *ident);
|
|
|
|
extern void can_rx_unregister(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);
|
|
|
|
#endif /* CAN_CORE_H */
|