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Aditi Ghag says: ==================== This patch set adds the capability to destroy sockets in BPF. We plan to use the capability in Cilium to force client sockets to reconnect when their remote load-balancing backends are deleted. The other use case is on-the-fly policy enforcement where existing socket connections prevented by policies need to be terminated. The use cases, and more details around the selected approach were presented at LPC 2022 - https://lpc.events/event/16/contributions/1358/. RFC discussion - https://lore.kernel.org/netdev/CABG=zsBEh-P4NXk23eBJw7eajB5YJeRS7oPXnTAzs=yob4EMoQ@mail.gmail.com/T/#u. v8 patch series - https://lore.kernel.org/bpf/20230517175359.527917-1-aditi.ghag@isovalent.com/ v9 highlights: Address review comments: Martin: - Rearranged the kfunc filter patch, and added the missing break statement. - Squashed the extended selftest/bpf patch. Yonghong: - Revised commit message for patch 1. (Below notes are same as v8 patch series that are still relevant. Refer to earlier patch series versions for other notes.) - I hit a snag while writing the kfunc where verifier complained about the `sock_common` type passed from TCP iterator. With kfuncs, there don't seem to be any options available to pass BTF type hints to the verifier (equivalent of `ARG_PTR_TO_BTF_ID_SOCK_COMMON`, as was the case with the helper). As a result, I changed the argument type of the sock_destory kfunc to `sock_common`. ==================== Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Linux kernel
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