On 06/12/2018 06:17 PM, Keith Busch wrote:
> My server's i40e no longer obtains an IP address on linux
> mainline. Bisected to the following:
>
> commit cc5b114dcf986bfd8e4c37bf65d1b7b1e5290ac6
> Author: Daniel Borkmann <[email protected]>
> Date: Mon May 28 11:07:20 2018 +0200
>
> bpf, i40e: add meta data support
>
> Reverting on mainline resolves the issue.
>
> Is there something wrong with my i40e adapter, or is the patch possibly
> doing something wrong? Or any other information I can get to help
> understand why it's stopped working with this feature?
>
> An excert from "journalctl -xe" on on the failing network adapter
> is below.
Thanks for the report & sorry for the issue, Keith! Instead of revert,
could you give the below fix a try?
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 8ffb745..ed6dbcf 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -2103,9 +2103,8 @@ static struct sk_buff *i40e_build_skb(struct i40e_ring
*rx_ring,
unsigned int truesize = i40e_rx_pg_size(rx_ring) / 2;
#else
unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
- SKB_DATA_ALIGN(I40E_SKB_PAD +
- (xdp->data_end -
- xdp->data_hard_start));
+ SKB_DATA_ALIGN(xdp->data_end -
+ xdp->data_hard_start);
#endif
struct sk_buff *skb;
@@ -2124,7 +2123,7 @@ static struct sk_buff *i40e_build_skb(struct i40e_ring
*rx_ring,
return NULL;
/* update pointers within the skb to store the data */
- skb_reserve(skb, I40E_SKB_PAD + (xdp->data - xdp->data_hard_start));
+ skb_reserve(skb, xdp->data - xdp->data_hard_start);
__skb_put(skb, xdp->data_end - xdp->data);
if (metasize)
skb_metadata_set(skb, metasize);
Thanks,
Daniel
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