bpf: lxc: use THIS_INTERFACE_IFINDEX instead of CB_IFINDEX#33524
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julianwiedmann merged 1 commit intocilium:mainfrom Jul 4, 2024
Merged
bpf: lxc: use THIS_INTERFACE_IFINDEX instead of CB_IFINDEX#33524julianwiedmann merged 1 commit intocilium:mainfrom
julianwiedmann merged 1 commit intocilium:mainfrom
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When bpf_lxc's ingress path is called via the policy tailcall map, it takes a CB_IFINDEX parameter. This is used to redirect the packet into the endpoint, after applying policy. But now that we bake the endpoint's ifindex into the bpf_lxc program, this can be replaced by THIS_INTERFACE_IFINDEX. Allowing us to eventually condense all the boolean flags (CB_IFINDEX / CB_FROM_HOST / CB_FROM_TUNNEL) into a single skb->cb slot. Signed-off-by: Julian Wiedmann <jwi@isovalent.com>
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When bpf_lxc's ingress path is called via the policy tailcall map, it takes a CB_IFINDEX parameter. This is used to redirect the packet into the endpoint, after applying policy.
But now that we bake the endpoint's ifindex into the bpf_lxc program, this can be replaced by THIS_INTERFACE_IFINDEX. Allowing us to eventually condense all the boolean flags (CB_IFINDEX / CB_FROM_HOST / CB_FROM_TUNNEL) into a single skb->cb slot.