diff options
| author | Scott Feldman <sfeldma@gmail.com> | 2015-07-18 18:24:48 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-20 18:32:44 -0700 |
| commit | 0c4f691ff6791e55ac831666df0b49b1679c56e4 (patch) | |
| tree | 18117c556b621eb90c9d9ce1ebfd131ca2f681b6 /include/linux/skbuff.h | |
| parent | 8254973fa3459b512b6c0cd5b0e4641e4d7c048c (diff) | |
| download | lwn-0c4f691ff6791e55ac831666df0b49b1679c56e4.tar.gz lwn-0c4f691ff6791e55ac831666df0b49b1679c56e4.zip | |
net: don't reforward packets already forwarded by offload device
Just before queuing skb for xmit on port, check if skb has been marked by
switchdev port driver as already fordwarded by device. If so, drop skb. A
non-zero skb->offload_fwd_mark field is set by the switchdev port
driver/device on ingress to indicate the skb has already been forwarded by
the device to egress ports with matching dev->skb_mark. The switchdev port
driver would assign a non-zero dev->offload_skb_mark for each device port
netdev during registration, for example.
Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index d6cdd6e87d53..af7a09650fa2 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -506,6 +506,7 @@ static inline u32 skb_mstamp_us_delta(const struct skb_mstamp *t1, * @no_fcs: Request NIC to treat last 4 bytes as Ethernet FCS * @napi_id: id of the NAPI struct this skb came from * @secmark: security marking + * @offload_fwd_mark: fwding offload mark * @mark: Generic packet mark * @vlan_proto: vlan encapsulation protocol * @vlan_tci: vlan tag control information @@ -650,9 +651,15 @@ struct sk_buff { unsigned int sender_cpu; }; #endif + union { #ifdef CONFIG_NETWORK_SECMARK - __u32 secmark; + __u32 secmark; +#endif +#ifdef CONFIG_NET_SWITCHDEV + __u32 offload_fwd_mark; #endif + }; + union { __u32 mark; __u32 reserved_tailroom; |