* Re: [bug report] net/mlx5e: TLS, Add Innova TLS TX offload data path
[not found] <20180503112300.GA6309@mwanda>
@ 2018-05-03 12:07 ` Leon Romanovsky
2018-05-03 16:04 ` Boris Pismenny
0 siblings, 1 reply; 2+ messages in thread
From: Leon Romanovsky @ 2018-05-03 12:07 UTC (permalink / raw)
To: Dan Carpenter, Saeed Mahameed, Boris Pismenny; +Cc: linux-rdma, netdev
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+ Saeed, Boris and netdev
On Thu, May 03, 2018 at 02:23:00PM +0300, Dan Carpenter wrote:
> Hello Ilya Lesokhin,
>
> The patch bf23974104fa: "net/mlx5e: TLS, Add Innova TLS TX offload
> data path" from Apr 30, 2018, leads to the following static checker
> warning:
>
> drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.c:63 mlx5e_tls_add_metadata()
> warn: struct type mismatch 'ethhdr vs mlx5e_tls_metadata'
>
> drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.c
> 55 static int mlx5e_tls_add_metadata(struct sk_buff *skb, __be32 swid)
> 56 {
> 57 struct mlx5e_tls_metadata *pet;
> 58 struct ethhdr *eth;
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 59
> 60 if (skb_cow_head(skb, sizeof(struct mlx5e_tls_metadata)))
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 61 return -ENOMEM;
> 62
> 63 eth = (struct ethhdr *)skb_push(skb, sizeof(struct mlx5e_tls_metadata));
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> This feels like it should be sizeof(*eth) + sizeof(*pet)?
>
> 64 skb->mac_header -= sizeof(struct mlx5e_tls_metadata);
> 65 pet = (struct mlx5e_tls_metadata *)(eth + 1);
> 66
> 67 memmove(skb->data, skb->data + sizeof(struct mlx5e_tls_metadata),
> 68 2 * ETH_ALEN);
> 69
> 70 eth->h_proto = cpu_to_be16(MLX5E_METADATA_ETHER_TYPE);
> 71 pet->syndrome_swid = htonl(SYNDROME_OFFLOAD_REQUIRED << 24) | swid;
> 72
> 73 return 0;
> 74 }
>
> regards,
> dan carpenter
> --
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [bug report] net/mlx5e: TLS, Add Innova TLS TX offload data path
2018-05-03 12:07 ` [bug report] net/mlx5e: TLS, Add Innova TLS TX offload data path Leon Romanovsky
@ 2018-05-03 16:04 ` Boris Pismenny
0 siblings, 0 replies; 2+ messages in thread
From: Boris Pismenny @ 2018-05-03 16:04 UTC (permalink / raw)
To: Leon Romanovsky, Dan Carpenter, Saeed Mahameed; +Cc: linux-rdma, netdev
Hi Dan,
Thanks for taking a look at our code.
On 05/03/18 15:07, Leon Romanovsky wrote:
> + Saeed, Boris and netdev
>
> On Thu, May 03, 2018 at 02:23:00PM +0300, Dan Carpenter wrote:
>> Hello Ilya Lesokhin,
>>
>> The patch bf23974104fa: "net/mlx5e: TLS, Add Innova TLS TX offload
>> data path" from Apr 30, 2018, leads to the following static checker
>> warning:
>>
>> drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.c:63 mlx5e_tls_add_metadata()
>> warn: struct type mismatch 'ethhdr vs mlx5e_tls_metadata'
>>
>> drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls_rxtx.c
>> 55 static int mlx5e_tls_add_metadata(struct sk_buff *skb, __be32 swid)
>> 56 {
>> 57 struct mlx5e_tls_metadata *pet;
>> 58 struct ethhdr *eth;
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> 59
>> 60 if (skb_cow_head(skb, sizeof(struct mlx5e_tls_metadata)))
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> 61 return -ENOMEM;
>> 62
>> 63 eth = (struct ethhdr *)skb_push(skb, sizeof(struct mlx5e_tls_metadata));
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> This feels like it should be sizeof(*eth) + sizeof(*pet)?
No, we add only "sizeof(struct mlx5e_tls_metadata)" bytes to the skb
headroom for the mlx5_tls_metadata. The Ethernet header is already there.
>>
>> 64 skb->mac_header -= sizeof(struct mlx5e_tls_metadata);
>> 65 pet = (struct mlx5e_tls_metadata *)(eth + 1);
>> 66
>> 67 memmove(skb->data, skb->data + sizeof(struct mlx5e_tls_metadata),
>> 68 2 * ETH_ALEN);
>> 69
>> 70 eth->h_proto = cpu_to_be16(MLX5E_METADATA_ETHER_TYPE);
>> 71 pet->syndrome_swid = htonl(SYNDROME_OFFLOAD_REQUIRED << 24) | swid;
>> 72
>> 73 return 0;
>> 74 }
>>
>> regards,
>> dan carpenter
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
Best,
Boris.
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2018-05-03 12:07 ` [bug report] net/mlx5e: TLS, Add Innova TLS TX offload data path Leon Romanovsky
2018-05-03 16:04 ` Boris Pismenny
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