netdev - Re: [PATCH 2/2] be2net: drop non-tso frames longer than mtu

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Message-ID: <525D46F1.6060502@cogentembedded.com>
Date:	Tue, 15 Oct 2013 17:45:21 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Sathya Perla <sathya.perla@...lex.com>
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH 2/2] be2net: drop non-tso frames longer than mtu

Hello.

On 15-10-2013 15:56, Sathya Perla wrote:

> From: Vasundhara Volam <vasundhara.volam@...lex.com>

> Pktgen can generate non-TSO frames of arbitrary length disregarding
> the MTU value of the physical interface. Drop such frames in the driver
> instead of sending them to HW as it cannot handle such frames.

> Signed-off-by: Vasundhara Volam <vasundhara.volam@...lex.com>
> Signed-off-by: Sathya Perla <sathya.perla@...lex.com>
> ---
>   drivers/net/ethernet/emulex/benet/be_main.c |    9 +++++++--
>   1 files changed, 7 insertions(+), 2 deletions(-)

> diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
> index 2c38cc4..76057b8 100644
> --- a/drivers/net/ethernet/emulex/benet/be_main.c
> +++ b/drivers/net/ethernet/emulex/benet/be_main.c
> @@ -855,6 +855,13 @@ static struct sk_buff *be_xmit_workarounds(struct be_adapter *adapter,
>   	unsigned int eth_hdr_len;
>   	struct iphdr *ip;
>
> +	/* Don't allow non-TSO packets longer than MTU */
> +	eth_hdr_len = (ntohs(skb->protocol) == ETH_P_8021Q) ?
> +			VLAN_ETH_HLEN : ETH_HLEN;
> +	if (!skb_is_gso(skb) &&
> +	    (skb->len - eth_hdr_len) > adapter->netdev->mtu)
> +			goto tx_drop;

    This *goto* is indented one tab too much.

WBR, Sergei

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