From: Oliver Hartkopp <socketcan-fJ+pQTUTwRTk1uMJSBkQmQ@public•gmane.org>
To: David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public•gmane.org>
Cc: socketcan-core-0fE9KPoRgkgATYTw5x5z8w@public•gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public•gmane.org,
mkl-bIcnvbaLZ9MEGnE8C9+IrQ@public•gmane.org,
wg-5Yr1BZd7O62+XT7JhA+gdA@public•gmane.org
Subject: Re: [PATCH net-next-2.6 v3] can: Unify droping of invalid tx skbs and netdev stats
Date: Tue, 12 Jan 2010 09:32:11 +0100 [thread overview]
Message-ID: <4B4C338B.7000808@hartkopp.net> (raw)
In-Reply-To: <20100111.155537.166350032.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
David Miller wrote:
> From: Oliver Hartkopp <socketcan-fJ+pQTUTwRTk1uMJSBkQmQ@public•gmane.org>
> Date: Tue, 12 Jan 2010 00:19:21 +0100
>
>> static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev)
>> {
>> + struct can_frame *cf = (struct can_frame *)skb->data;
>> struct net_device_stats *stats = &dev->stats;
>> int loop;
>>
>> + if (unlikely(skb->len != sizeof(*cf) || cf->can_dlc > 8)) {
>> + kfree_skb(skb);
>> + stats->tx_dropped++;
>> + return NETDEV_TX_OK;
>> + }
>> +
> ...
>> +/* Drop a given socketbuffer if it does not contain a valid CAN frame. */
>> +static inline int can_dropped_invalid_skb(struct net_device *dev,
>> + struct sk_buff *skb)
>> +{
>> + const struct can_frame *cf = (struct can_frame *)skb->data;
>> +
>> + if (unlikely(skb->len != sizeof(*cf) || cf->can_dlc > 8)) {
>> + kfree_skb(skb);
>> + dev->stats.tx_dropped++;
>> + return 1;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max);
>
> Why are you not using the new helper function in vcan_tx()?
I just wanted the vcan driver keep off including "include/linux/can/dev.h"
which is intended for 'real' CAN hardware.
As the vcan software devices do not need the bitrate-setting and skb echo
handling from the driver library for real CAN devices, this inline function
would be the only reason to include ".../dev.h"
But i don't have a strong preference to do it like this. Do you think i
should change it to used the defined inline function?
Regards,
Oliver
next prev parent reply other threads:[~2010-01-12 8:32 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-11 23:19 [PATCH net-next-2.6 v3] can: Unify droping of invalid tx skbs and netdev stats Oliver Hartkopp
[not found] ` <4B4BB1F9.3010808-fJ+pQTUTwRTk1uMJSBkQmQ@public.gmane.org>
2010-01-11 23:55 ` David Miller
[not found] ` <20100111.155537.166350032.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2010-01-12 8:32 ` Oliver Hartkopp [this message]
[not found] ` <4B4C338B.7000808-fJ+pQTUTwRTk1uMJSBkQmQ@public.gmane.org>
2010-01-12 8:39 ` David Miller
2010-01-12 8:44 ` Wolfgang Grandegger
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