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Date: Fri, 6 May 2016 13:43:07 -0700
From: Tom Herbert <tom@...bertland.com>
To: Alexander Duyck <alexander.duyck@...il.com>
Cc: David Miller <davem@...emloft.net>,
Netdev <netdev@...r.kernel.org>, Kernel Team <kernel-team@...com>
Subject: Re: [PATCH v2 next-next 02/12] net: define gso types for IPx over
IPv4 and IPv6
On Fri, May 6, 2016 at 1:34 PM, Alexander Duyck
<alexander.duyck@...il.com> wrote:
> On Fri, May 6, 2016 at 1:04 PM, Tom Herbert <tom@...bertland.com> wrote:
>> This patch defines two new GDO definitions SKB_GSO_IPXIP4 and
>> SKB_GSO_IPXIP6 along with corresponding NETIF_F_GSO_IPXIP4 and
>> NETIF_F_GSO_IPXIP6. These are used to described IP in IP
>> tunnel and what the outer protocol is. The inner protocol
>> can be deduced from other GSO types (e.g. SKB_GSO_TCPV4 and
>> SKB_GSO_TCPV6). The GSO types of SKB_GSO_IPIP and SKB_GSO_SIT
>> are removed (these are both instances of SKB_GSO_IPXIP4).
>> SKB_GSO_IPXIP6 will be used when support for GSO with IP
>> encapsulation over IPv6 is added.
>>
>> Signed-off-by: Tom Herbert <tom@...bertland.com>
>> ---
>> drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c | 5 ++---
>> drivers/net/ethernet/broadcom/bnxt/bnxt.c | 4 ++--
>> drivers/net/ethernet/intel/i40e/i40e_main.c | 3 +--
>> drivers/net/ethernet/intel/i40e/i40e_txrx.c | 3 +--
>> drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 3 +--
>> drivers/net/ethernet/intel/i40evf/i40evf_main.c | 3 +--
>> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 +--
>> drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 3 +--
>> include/linux/netdev_features.h | 12 ++++++------
>> include/linux/netdevice.h | 4 ++--
>> include/linux/skbuff.h | 4 ++--
>> net/core/ethtool.c | 4 ++--
>> net/ipv4/af_inet.c | 2 +-
>> net/ipv4/ipip.c | 2 +-
>> net/ipv6/ip6_offload.c | 4 ++--
>> net/ipv6/sit.c | 4 ++--
>> net/netfilter/ipvs/ip_vs_xmit.c | 11 ++---------
>> 17 files changed, 30 insertions(+), 44 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
>> index d465bd7..0a5b770 100644
>> --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
>> +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
>> @@ -13259,12 +13259,11 @@ static int bnx2x_init_dev(struct bnx2x *bp, struct pci_dev *pdev,
>> NETIF_F_RXHASH | NETIF_F_HW_VLAN_CTAG_TX;
>> if (!chip_is_e1x) {
>> dev->hw_features |= NETIF_F_GSO_GRE | NETIF_F_GSO_UDP_TUNNEL |
>> - NETIF_F_GSO_IPIP | NETIF_F_GSO_SIT;
>> + NETIF_F_GSO_IPXIP4;
>> dev->hw_enc_features =
>> NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_SG |
>> NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6 |
>> - NETIF_F_GSO_IPIP |
>> - NETIF_F_GSO_SIT |
>> + NETIF_F_GSO_IPXIP4 |
>> NETIF_F_GSO_GRE | NETIF_F_GSO_UDP_TUNNEL;
>> }
>>
>> diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
>> index fd85b6d..e449228 100644
>> --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
>> +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
>> @@ -6218,7 +6218,7 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>> dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_SG |
>> NETIF_F_TSO | NETIF_F_TSO6 |
>> NETIF_F_GSO_UDP_TUNNEL | NETIF_F_GSO_GRE |
>> - NETIF_F_GSO_IPIP | NETIF_F_GSO_SIT |
>> + NETIF_F_GSO_IPXIP4 |
>> NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_GSO_GRE_CSUM |
>> NETIF_F_GSO_PARTIAL | NETIF_F_RXHASH |
>> NETIF_F_RXCSUM | NETIF_F_LRO | NETIF_F_GRO;
>> @@ -6228,7 +6228,7 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>> NETIF_F_TSO | NETIF_F_TSO6 |
>> NETIF_F_GSO_UDP_TUNNEL | NETIF_F_GSO_GRE |
>> NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_GSO_GRE_CSUM |
>> - NETIF_F_GSO_IPIP | NETIF_F_GSO_SIT |
>> + NETIF_F_GSO_IPXIP4;
>> NETIF_F_GSO_PARTIAL;
>> dev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM |
>> NETIF_F_GSO_GRE_CSUM;
>> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
>> index f6da6b7..c2a4c10 100644
>> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
>> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
>> @@ -9131,8 +9131,7 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
>> NETIF_F_TSO6 |
>> NETIF_F_GSO_GRE |
>> NETIF_F_GSO_GRE_CSUM |
>> - NETIF_F_GSO_IPIP |
>> - NETIF_F_GSO_SIT |
>> + NETIF_F_GSO_IPXIP4 |
>> NETIF_F_GSO_UDP_TUNNEL |
>> NETIF_F_GSO_UDP_TUNNEL_CSUM |
>> NETIF_F_GSO_PARTIAL |
>
> So for all the Intel drivers they support IPv6 and IPv4 outer header
> tunnel types. As such you can add SKB_GSO_IPXIP6 as well and you
> should be able to see offloads without any issues. This applies for
> all the Intel drivers below and igb which should have a patch
> available sometime soon as it is still in Jeff Kirsher's tree.
>
Can we do this in a follow up patch?
>> diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
>> index 2765d7e..4a3d60a 100644
>> --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
>> +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
>> @@ -2302,8 +2302,7 @@ static int i40e_tso(struct sk_buff *skb, u8 *hdr_len, u64 *cd_type_cmd_tso_mss)
>>
>> if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
>> SKB_GSO_GRE_CSUM |
>> - SKB_GSO_IPIP |
>> - SKB_GSO_SIT |
>> + SKB_GSO_IPXIP4 |
>> SKB_GSO_UDP_TUNNEL |
>> SKB_GSO_UDP_TUNNEL_CSUM)) {
>> if (!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&
>> diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
>> index ede8dfc..aaccb7e 100644
>> --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
>> +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
>> @@ -1567,8 +1567,7 @@ static int i40e_tso(struct sk_buff *skb, u8 *hdr_len, u64 *cd_type_cmd_tso_mss)
>>
>> if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
>> SKB_GSO_GRE_CSUM |
>> - SKB_GSO_IPIP |
>> - SKB_GSO_SIT |
>> + SKB_GSO_IPXIP4 |
>> SKB_GSO_UDP_TUNNEL |
>> SKB_GSO_UDP_TUNNEL_CSUM)) {
>> if (!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) &&
>> diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
>> index 9f0bd7a..bfd0962 100644
>> --- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
>> +++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
>> @@ -2241,8 +2241,7 @@ int i40evf_process_config(struct i40evf_adapter *adapter)
>> NETIF_F_TSO6 |
>> NETIF_F_GSO_GRE |
>> NETIF_F_GSO_GRE_CSUM |
>> - NETIF_F_GSO_IPIP |
>> - NETIF_F_GSO_SIT |
>> + NETIF_F_GSO_IPXIP4 |
>> NETIF_F_GSO_UDP_TUNNEL |
>> NETIF_F_GSO_UDP_TUNNEL_CSUM |
>> NETIF_F_GSO_PARTIAL |
>> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
>> index d08fbcf..28e3b5a 100644
>> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
>> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
>> @@ -9482,8 +9482,7 @@ skip_sriov:
>>
>> #define IXGBE_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
>> NETIF_F_GSO_GRE_CSUM | \
>> - NETIF_F_GSO_IPIP | \
>> - NETIF_F_GSO_SIT | \
>> + NETIF_F_GSO_IPXIP4 | \
>> NETIF_F_GSO_UDP_TUNNEL | \
>> NETIF_F_GSO_UDP_TUNNEL_CSUM)
>>
>> diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
>> index 5e348b1..d86e511 100644
>> --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
>> +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
>> @@ -4062,8 +4062,7 @@ static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
>>
>> #define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
>> NETIF_F_GSO_GRE_CSUM | \
>> - NETIF_F_GSO_IPIP | \
>> - NETIF_F_GSO_SIT | \
>> + NETIF_F_GSO_IPXIP4 | \
>> NETIF_F_GSO_UDP_TUNNEL | \
>> NETIF_F_GSO_UDP_TUNNEL_CSUM)
>>
>
> So with GSO partial all of the igb/ixgbe parts should be able to
> support any tunnel type you can throw at it.
>
>> diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
>> index bc87362..aa7b240 100644
>> --- a/include/linux/netdev_features.h
>> +++ b/include/linux/netdev_features.h
>> @@ -44,8 +44,8 @@ enum {
>> NETIF_F_FSO_BIT, /* ... FCoE segmentation */
>> NETIF_F_GSO_GRE_BIT, /* ... GRE with TSO */
>> NETIF_F_GSO_GRE_CSUM_BIT, /* ... GRE with csum with TSO */
>> - NETIF_F_GSO_IPIP_BIT, /* ... IPIP tunnel with TSO */
>> - NETIF_F_GSO_SIT_BIT, /* ... SIT tunnel with TSO */
>> + NETIF_F_GSO_IPXIP4_BIT, /* ... IP4 or IP6 over IP4 with TSO */
>> + NETIF_F_GSO_IPXIP6_BIT, /* ... IP4 or IP6 over IP6 with TSO */
>> NETIF_F_GSO_UDP_TUNNEL_BIT, /* ... UDP TUNNEL with TSO */
>> NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */
>> NETIF_F_GSO_PARTIAL_BIT, /* ... Only segment inner-most L4
>> @@ -121,8 +121,8 @@ enum {
>> #define NETIF_F_RXALL __NETIF_F(RXALL)
>> #define NETIF_F_GSO_GRE __NETIF_F(GSO_GRE)
>> #define NETIF_F_GSO_GRE_CSUM __NETIF_F(GSO_GRE_CSUM)
>> -#define NETIF_F_GSO_IPIP __NETIF_F(GSO_IPIP)
>> -#define NETIF_F_GSO_SIT __NETIF_F(GSO_SIT)
>> +#define NETIF_F_GSO_IPXIP4 __NETIF_F(GSO_IPXIP4)
>> +#define NETIF_F_GSO_IPXIP6 __NETIF_F(GSO_IPXIP6)
>> #define NETIF_F_GSO_UDP_TUNNEL __NETIF_F(GSO_UDP_TUNNEL)
>> #define NETIF_F_GSO_UDP_TUNNEL_CSUM __NETIF_F(GSO_UDP_TUNNEL_CSUM)
>> #define NETIF_F_TSO_MANGLEID __NETIF_F(TSO_MANGLEID)
>> @@ -200,8 +200,8 @@ enum {
>>
>> #define NETIF_F_GSO_ENCAP_ALL (NETIF_F_GSO_GRE | \
>> NETIF_F_GSO_GRE_CSUM | \
>> - NETIF_F_GSO_IPIP | \
>> - NETIF_F_GSO_SIT | \
>> + NETIF_F_GSO_IPXIP4 | \
>> + NETIF_F_GSO_IPXIP6 | \
>> NETIF_F_GSO_UDP_TUNNEL | \
>> NETIF_F_GSO_UDP_TUNNEL_CSUM)
>>
>> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
>> index 63580e6..8b1eedc 100644
>> --- a/include/linux/netdevice.h
>> +++ b/include/linux/netdevice.h
>> @@ -4005,8 +4005,8 @@ static inline bool net_gso_ok(netdev_features_t features, int gso_type)
>> BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
>> BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
>> BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
>> - BUILD_BUG_ON(SKB_GSO_IPIP != (NETIF_F_GSO_IPIP >> NETIF_F_GSO_SHIFT));
>> - BUILD_BUG_ON(SKB_GSO_SIT != (NETIF_F_GSO_SIT >> NETIF_F_GSO_SHIFT));
>> + BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
>> + BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
>> BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
>> BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
>> BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
>> diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
>> index c413c58..65968a9 100644
>> --- a/include/linux/skbuff.h
>> +++ b/include/linux/skbuff.h
>> @@ -471,9 +471,9 @@ enum {
>>
>> SKB_GSO_GRE_CSUM = 1 << 8,
>>
>> - SKB_GSO_IPIP = 1 << 9,
>> + SKB_GSO_IPXIP4 = 1 << 9,
>>
>> - SKB_GSO_SIT = 1 << 10,
>> + SKB_GSO_IPXIP6 = 1 << 10,
>>
>> SKB_GSO_UDP_TUNNEL = 1 << 11,
>>
>> diff --git a/net/core/ethtool.c b/net/core/ethtool.c
>> index bdb4013..f403481 100644
>> --- a/net/core/ethtool.c
>> +++ b/net/core/ethtool.c
>> @@ -84,8 +84,8 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
>> [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
>> [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
>> [NETIF_F_GSO_GRE_CSUM_BIT] = "tx-gre-csum-segmentation",
>> - [NETIF_F_GSO_IPIP_BIT] = "tx-ipip-segmentation",
>> - [NETIF_F_GSO_SIT_BIT] = "tx-sit-segmentation",
>> + [NETIF_F_GSO_IPXIP4_BIT] = "tx-ipxip4-segmentation",
>> + [NETIF_F_GSO_IPXIP6_BIT] = "tx-ipxip6-segmentation",
>> [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
>> [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
>> [NETIF_F_GSO_PARTIAL_BIT] = "tx-gso-partial",
>> diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
>> index 7f08d45..25040b1 100644
>> --- a/net/ipv4/af_inet.c
>> +++ b/net/ipv4/af_inet.c
>> @@ -1483,7 +1483,7 @@ out_unlock:
>> static int ipip_gro_complete(struct sk_buff *skb, int nhoff)
>> {
>> skb->encapsulation = 1;
>> - skb_shinfo(skb)->gso_type |= SKB_GSO_IPIP;
>> + skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP4;
>> return inet_gro_complete(skb, nhoff);
>> }
>>
>> diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
>> index 9282748..9783701 100644
>> --- a/net/ipv4/ipip.c
>> +++ b/net/ipv4/ipip.c
>> @@ -219,7 +219,7 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
>> if (unlikely(skb->protocol != htons(ETH_P_IP)))
>> goto tx_error;
>>
>> - if (iptunnel_handle_offloads(skb, SKB_GSO_IPIP))
>> + if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP4))
>> goto tx_error;
>>
>> skb_set_inner_ipproto(skb, IPPROTO_IPIP);
>> diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
>> index 9ad743b..787e55f 100644
>> --- a/net/ipv6/ip6_offload.c
>> +++ b/net/ipv6/ip6_offload.c
>> @@ -86,7 +86,7 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
>> proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
>>
>> if (skb->encapsulation &&
>> - skb_shinfo(skb)->gso_type & (SKB_GSO_SIT|SKB_GSO_IPIP))
>> + skb_shinfo(skb)->gso_type & (SKB_GSO_IPXIP4 | SKB_GSO_IPXIP6))
>> udpfrag = proto == IPPROTO_UDP && encap;
>> else
>> udpfrag = proto == IPPROTO_UDP && !skb->encapsulation;
>> @@ -294,7 +294,7 @@ out_unlock:
>> static int sit_gro_complete(struct sk_buff *skb, int nhoff)
>> {
>> skb->encapsulation = 1;
>> - skb_shinfo(skb)->gso_type |= SKB_GSO_SIT;
>> + skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP4;
>> return ipv6_gro_complete(skb, nhoff);
>> }
>>
>> diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
>> index a13d8c1..0a5a255 100644
>> --- a/net/ipv6/sit.c
>> +++ b/net/ipv6/sit.c
>> @@ -913,7 +913,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
>> goto tx_error;
>> }
>>
>> - if (iptunnel_handle_offloads(skb, SKB_GSO_SIT)) {
>> + if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP4)) {
>> ip_rt_put(rt);
>> goto tx_error;
>> }
>> @@ -1000,7 +1000,7 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
>> struct ip_tunnel *tunnel = netdev_priv(dev);
>> const struct iphdr *tiph = &tunnel->parms.iph;
>>
>> - if (iptunnel_handle_offloads(skb, SKB_GSO_IPIP))
>> + if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP4))
>> goto tx_error;
>>
>> skb_set_inner_ipproto(skb, IPPROTO_IPIP);
>> diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
>> index 6d19d2e..f646ef6 100644
>> --- a/net/netfilter/ipvs/ip_vs_xmit.c
>> +++ b/net/netfilter/ipvs/ip_vs_xmit.c
>> @@ -932,16 +932,9 @@ error:
>>
>> static inline int __tun_gso_type_mask(int encaps_af, int orig_af)
>> {
>> - if (encaps_af == AF_INET) {
>> - if (orig_af == AF_INET)
>> - return SKB_GSO_IPIP;
>> + if (encaps_af == AF_INET)
>> + return SKB_GSO_IPXIP4;
>>
>> - return SKB_GSO_SIT;
>> - }
>> -
>> - /* GSO: we need to provide proper SKB_GSO_ value for IPv6:
>> - * SKB_GSO_SIT/IPV6
>> - */
>
> I wouldn't delete this comment until you actually have resolved the
> issue of providing a proper GSO value for IPv6.
>
>> return 0;
>> }
>>
>> --
>> 2.8.0.rc2
>>
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