| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 5 May 2016 15:50:53 -0700
From: Alex Duyck <aduyck@...antis.com>
To: Tom Herbert <tom@...bertland.com>
Cc: Linux Kernel Network Developers <netdev@...r.kernel.org>,
Michael Chan <michael.chan@...adcom.com>,
Alexander Duyck <alexander.duyck@...il.com>
Subject: Re: [RFC PATCH] gso: Replace SKB_GSO_IPIP and SKB_GSO_SIT with outer
L3 types
On Thu, May 5, 2016 at 3:34 PM, Tom Herbert <tom@...bertland.com> wrote:
> I'm testing a similar change, it seems like a good idea.
Okay, I wasn't sure if that was the case based on our last discussion.
The bits for the drivers below more or less call out the drivers I am
confident can handle V4 or V6 for tunnels.
> On Thu, May 5, 2016 at 3:12 PM, Alexander Duyck <aduyck@...antis.com> wrote:
>> This patch removes SKB_GSO_IPIP and SKB_GSO_SIT and instead replaces them
>> with SKB_GSO_IPIPV4 and SKB_GSO_IPIPV6. The idea here is that SKB_GSO_IPIP
>> and SKB_GSO_SIT are actually redundant as TCPV4 and TCPV6 were already
>> representing the inner network header type. By reporting what the outer
>> network header type is we should be able to represent all applicable cases
>> as SKB_GSO_IPIPV4 can be combined with SKB_GSO_TCPV4 or SKB_GSO_TCPV6 and
>> it should then be possible to describe all possible IP in IP tunnel
>> combinations for inner and outer v4/v6.
>>
>> I played it safe with the Broadcom drivers and just merged GSO_IPIP and
>> GSO_SIT into GSO_IPIPV4, if the drivers do support outer IPv6 tunnels I can
>> either update this patch to add them in, or can add a patch to enable that
>> later.
>>
>> In the case of the Intel drivers I know they should be able to handle IPv6
>> outer headers so I went ahead and enabled GSO_IPIPV6 for them.
>>
>> This patch is meant to be applied after "gso: Remove arbitrary checks for
>> unsupported GSO" which can be found at:
>> https://patchwork.ozlabs.org/patch/618757/
>>
>> Signed-off-by: Alexander Duyck <aduyck@...antis.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 | 4 ++--
>> drivers/net/ethernet/intel/i40e/i40e_txrx.c | 4 ++--
>> drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 4 ++--
>> drivers/net/ethernet/intel/i40evf/i40evf_main.c | 4 ++--
>> drivers/net/ethernet/intel/igb/igb_main.c | 4 ++--
>> drivers/net/ethernet/intel/igbvf/netdev.c | 4 ++--
>> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 4 ++--
>> drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 4 ++--
>> 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 | 16 +++++++++++-----
>> net/ipv4/ipip.c | 2 +-
>> net/ipv6/ip6_offload.c | 7 +++++--
>> net/ipv6/sit.c | 4 ++--
>> net/netfilter/ipvs/ip_vs_xmit.c | 14 +++-----------
>> 19 files changed, 54 insertions(+), 54 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
>> index d465bd721146..fbc713094611 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_IPIPV4;
>
> I prefer using IPXIP4 and IPXIP6, especially to be clear that the
> inner protocol is either IP version.
That works for me.
>> 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_IPIPV4 |
>> 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 fd85b6dd4a6e..b3821fbf8e1b 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_IPIPV4 |
>> 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_IPIPV4 |
>> 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 1cd0ebf7520a..bf1d31c4e310 100644
>> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
>> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
>> @@ -9083,8 +9083,8 @@ 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_IPIPV4 |
>> + NETIF_F_GSO_IPIPV6 |
>> NETIF_F_GSO_UDP_TUNNEL |
>> NETIF_F_GSO_UDP_TUNNEL_CSUM |
>> NETIF_F_GSO_PARTIAL |
>> diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
>> index 36a34f7191e3..180d4a889c69 100644
>> --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
>> +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
>> @@ -2302,8 +2302,8 @@ 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_IPIPV4 |
>> + SKB_GSO_IPIPV6 |
>> 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 fd7dae46c5d8..e2630c663cfb 100644
>> --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
>> +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c
>> @@ -1559,8 +1559,8 @@ 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_IPIPV4 |
>> + SKB_GSO_IPIPV6 |
>> 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 642bb45ed906..3a72568d8175 100644
>> --- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
>> +++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
>> @@ -2230,8 +2230,8 @@ 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_IPIPV4 |
>> + NETIF_F_GSO_IPIPV6 |
>> NETIF_F_GSO_UDP_TUNNEL |
>> NETIF_F_GSO_UDP_TUNNEL_CSUM |
>> NETIF_F_GSO_PARTIAL |
>> diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
>> index 21727692bef6..1ba2213ce5d5 100644
>> --- a/drivers/net/ethernet/intel/igb/igb_main.c
>> +++ b/drivers/net/ethernet/intel/igb/igb_main.c
>> @@ -2418,8 +2418,8 @@ static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
>>
>> #define IGB_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
>> NETIF_F_GSO_GRE_CSUM | \
>> - NETIF_F_GSO_IPIP | \
>> - NETIF_F_GSO_SIT | \
>> + NETIF_F_GSO_IPIPV4 | \
>> + NETIF_F_GSO_IPIPV6 | \
>> NETIF_F_GSO_UDP_TUNNEL | \
>> NETIF_F_GSO_UDP_TUNNEL_CSUM)
>>
>> diff --git a/drivers/net/ethernet/intel/igbvf/netdev.c b/drivers/net/ethernet/intel/igbvf/netdev.c
>> index 322a2d7828a5..de1827983096 100644
>> --- a/drivers/net/ethernet/intel/igbvf/netdev.c
>> +++ b/drivers/net/ethernet/intel/igbvf/netdev.c
>> @@ -2763,8 +2763,8 @@ static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
>>
>> #define IGBVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
>> NETIF_F_GSO_GRE_CSUM | \
>> - NETIF_F_GSO_IPIP | \
>> - NETIF_F_GSO_SIT | \
>> + NETIF_F_GSO_IPIPV4 | \
>> + NETIF_F_GSO_IPIPV6 | \
>> NETIF_F_GSO_UDP_TUNNEL | \
>> NETIF_F_GSO_UDP_TUNNEL_CSUM)
>>
>> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
>> index d08fbcfb9417..9180361a909c 100644
>> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
>> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
>> @@ -9482,8 +9482,8 @@ 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_IPIPV4 | \
>> + NETIF_F_GSO_IPIPV6 | \
>> 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 5e348b125090..622f456ec41e 100644
>> --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
>> +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
>> @@ -4062,8 +4062,8 @@ 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_IPIPV4 | \
>> + NETIF_F_GSO_IPIPV6 | \
>> NETIF_F_GSO_UDP_TUNNEL | \
>> NETIF_F_GSO_UDP_TUNNEL_CSUM)
>>
>> diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
>> index bc8736266749..f10248df9705 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_IPIPV4_BIT, /* ... IP in IPv4 tunnel with TSO */
>> + NETIF_F_GSO_IPIPV6_BIT, /* ... IP in IPv6 tunnel 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_IPIPV4 __NETIF_F(GSO_IPIPV4)
>> +#define NETIF_F_GSO_IPIPV6 __NETIF_F(GSO_IPIPV6)
>> #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_IPIPV4 | \
>> + NETIF_F_GSO_IPIPV6 | \
>> NETIF_F_GSO_UDP_TUNNEL | \
>> NETIF_F_GSO_UDP_TUNNEL_CSUM)
>>
>> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
>> index 63580e6d0df4..d9d05d6b5849 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_IPIPV4 != (NETIF_F_GSO_IPIPV4 >> NETIF_F_GSO_SHIFT));
>> + BUILD_BUG_ON(SKB_GSO_IPIPV6 != (NETIF_F_GSO_IPIPV6 >> 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 c413c588a24f..6186a6446d1c 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_IPIPV4 = 1 << 9,
>>
>> - SKB_GSO_SIT = 1 << 10,
>> + SKB_GSO_IPIPV6 = 1 << 10,
>>
>> SKB_GSO_UDP_TUNNEL = 1 << 11,
>>
>> diff --git a/net/core/ethtool.c b/net/core/ethtool.c
>> index bdb4013581b1..8771dafe93ec 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_IPIPV4_BIT] = "tx-ipip4-segmentation",
>> + [NETIF_F_GSO_IPIPV6_BIT] = "tx-ipip6-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 7f08d4525981..c62230f1b16b 100644
>> --- a/net/ipv4/af_inet.c
>> +++ b/net/ipv4/af_inet.c
>> @@ -1459,20 +1459,25 @@ static int inet_gro_complete(struct sk_buff *skb, int nhoff)
>>
>> if (skb->encapsulation)
>> skb_set_inner_network_header(skb, nhoff);
>> + else
>> + skb_set_network_header(skb, nhoff);
>
> This seems like an unrelated change.
It was needed for the bits in ipip_gro_complete and sit_gro_complete.
I agree that based on your other comments this is not needed.
>>
>> csum_replace2(&iph->check, iph->tot_len, newlen);
>> iph->tot_len = newlen;
>>
>> rcu_read_lock();
>> - ops = rcu_dereference(inet_offloads[proto]);
>> - if (WARN_ON(!ops || !ops->callbacks.gro_complete))
>> - goto out_unlock;
>>
>> /* Only need to add sizeof(*iph) to get to the next hdr below
>> * because any hdr with option will have been flushed in
>> * inet_gro_receive().
>> */
>> - err = ops->callbacks.gro_complete(skb, nhoff + sizeof(*iph));
>> + nhoff += sizeof(*iph);
>> +
>> + ops = rcu_dereference(inet_offloads[proto]);
>> + if (WARN_ON(!ops || !ops->callbacks.gro_complete))
>> + goto out_unlock;
>> +
>> + err = ops->callbacks.gro_complete(skb, nhoff);
>
> Why this change?
This is a bit of mess left from an experiment I did where I was also
resetting the outer transport header. It turns out we are leaving the
outer transport header pointing at the inner header. I was debating
adding a line after the call to gro_complete that resets the outer
network header using skb_set_transport_header.
>>
>> out_unlock:
>> rcu_read_unlock();
>> @@ -1483,7 +1488,8 @@ 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 = (ip_hdr(skb)->version == 4) ?
>> + SKB_GSO_IPIPV4 : SKB_GSO_IPIPV6;
>
> I don't think this is necessary. IPIP means IPv4 over IPv4, IPv4 over
> IPv6 can have its own gro_complete
Yeah, I am not all that familiar with IPIP and SIT so I wasn't sure if
they were restricted like that or not. I kind of spaced on the fact
that it is an inet_offload and not something that is used for IPv4 and
IPv6.
The resetting of the network header and transport header is something
we might want to address perhaps for the GRO and bridging case but I
think other people may be working on that as well so for now I might
just go back to watching how this all develops.
Thanks.
- Alex
Powered by blists - more mailing lists