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can: add ability to allocate CANFD frame in skb data

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This patch adds the ability of allocating a CANFD frame data structure in the
skb data area.

Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Stephane Grosjean 2014-01-15 09:50:13 +01:00 committed by Marc Kleine-Budde
parent 16f6b87ac5
commit cb2518ca9f
2 changed files with 26 additions and 0 deletions
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24
drivers/net/can/dev.c
View file

@ -521,6 +521,30 @@ struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf)
}
EXPORT_SYMBOL_GPL(alloc_can_skb);
struct sk_buff *alloc_canfd_skb(struct net_device *dev,
struct canfd_frame **cfd)
{
struct sk_buff *skb;
skb = netdev_alloc_skb(dev, sizeof(struct can_skb_priv) +
sizeof(struct canfd_frame));
if (unlikely(!skb))
return NULL;
skb->protocol = htons(ETH_P_CANFD);
skb->pkt_type = PACKET_BROADCAST;
skb->ip_summed = CHECKSUM_UNNECESSARY;
can_skb_reserve(skb);
can_skb_prv(skb)->ifindex = dev->ifindex;
*cfd = (struct canfd_frame *)skb_put(skb, sizeof(struct canfd_frame));
memset(*cfd, 0, sizeof(struct canfd_frame));
return skb;
}
EXPORT_SYMBOL_GPL(alloc_canfd_skb);
struct sk_buff *alloc_can_err_skb(struct net_device *dev, struct can_frame **cf)
{
struct sk_buff *skb;

2
include/linux/can/dev.h
View file

@ -124,6 +124,8 @@ unsigned int can_get_echo_skb(struct net_device *dev, unsigned int idx);
void can_free_echo_skb(struct net_device *dev, unsigned int idx);
struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf);
struct sk_buff *alloc_canfd_skb(struct net_device *dev,
struct canfd_frame **cfd);
struct sk_buff *alloc_can_err_skb(struct net_device *dev,
struct can_frame **cf);