netdev - Re: [PATCH net] ibmvnic: Fix IPv6 packet descriptors

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Date:   Thu, 18 Jan 2018 19:15:10 -0600
From:   Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
To:     netdev@...r.kernel.org
Cc:     jallen@...ux.vnet.ibm.com, nfont@...ux.vnet.ibm.com
Subject: Re: [PATCH net] ibmvnic: Fix IPv6 packet descriptors

On 01/18/2018 07:05 PM, Thomas Falcon wrote:
> Packet descriptor generation for IPv6 is broken.
> Properly set L3 and L4 protocol flags for IPv6 descriptors.
>
> Signed-off-by: Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>

Sorry!  Forgot to check for formatting.  Please ignore this patch.

> ---
>  drivers/net/ethernet/ibm/ibmvnic.c | 22 ++++++++++++----------
>  1 file changed, 12 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
> index 3700bfa..4bb41cd 100644
> --- a/drivers/net/ethernet/ibm/ibmvnic.c
> +++ b/drivers/net/ethernet/ibm/ibmvnic.c
> @@ -1281,6 +1281,7 @@ static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
>  	u64 *handle_array;
>  	int index = 0;
>  	int ret = 0;
> +	u8 proto = 0;
>
>  	if (adapter->resetting) {
>  		if (!netif_subqueue_stopped(netdev, skb))
> @@ -1367,18 +1368,19 @@ static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
>  		tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
>  	}
>
> -	if (skb->protocol == htons(ETH_P_IP)) {
> -		if (ip_hdr(skb)->version == 4)
> -			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
> -		else if (ip_hdr(skb)->version == 6)
> -			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
> -
> -		if (ip_hdr(skb)->protocol == IPPROTO_TCP)
> -			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
> -		else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
> -			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
> +        if (skb->protocol == htons(ETH_P_IP)) {
> +		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
> +		proto = ip_hdr(skb)->protocol;
> +	} else if (skb->protocol == htons(ETH_P_IPV6)) {
> +		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
> +		proto = ipv6_hdr(skb)->nexthdr;
>  	}
>
> +	if (proto == IPPROTO_TCP)
> +		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
> +	else if (proto == IPPROTO_UDP)
> +		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
> +
>  	if (skb->ip_summed == CHECKSUM_PARTIAL) {
>  		tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
>  		hdrs += 2;