elf: add Module.RemoveXDPWithFlags method #275
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PR adds a method
Module.RemoveXDPWithFlagsto allow unloading xdp sections loaded withSKBakaxdpgenericflags (mode). CurrentlyAttachXDPhas a "sibling"AttachXDPWithFlagsbutRemoveXDPdoesn't. I was playing with modifying https://github.com/sematext/oxdpus and had to resort to vendoring this repository to addRemoveXDPWithFlagsfunction - only then I was able to unload the xdp program loaded withXDP_FLAGS_SKB_MODE[1].[1] https://github.com/dmitris/oxdpus/blob/skb-mode-vendor/vendordeps/github.com/iovisor/gobpf/elf/module.go#L543-L550, used in https://github.com/dmitris/oxdpus/blob/skb-mode-vendor/pkg/xdp/hook.go#L80