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authorFlorian Westphal <fw@strlen.de>2024-06-30 00:26:48 +0200
committerDaniel Borkmann <daniel@iogearbox.net>2024-07-01 17:01:53 +0200
commit89cc8f1c5f22568142b7ad118c738204708e4207 (patch)
tree8fe95643954df3fe3f519fe20ab6c46c41c4ac52 /tools/perf/scripts/python/call-graph-from-postgresql.py
parenta12978712d9001b060bcc10eaae42ad5102abe2b (diff)
netfilter: nf_tables: Add flowtable map for xdp offload
This adds a small internal mapping table so that a new bpf (xdp) kfunc can perform lookups in a flowtable. As-is, xdp program has access to the device pointer, but no way to do a lookup in a flowtable -- there is no way to obtain the needed struct without questionable stunts. This allows to obtain an nf_flowtable pointer given a net_device structure. In order to keep backward compatibility, the infrastructure allows the user to add a given device to multiple flowtables, but it will always return the first added mapping performing the lookup since it assumes the right configuration is 1:1 mapping between flowtables and net_devices. Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Pablo Neira Ayuso <pablo@netfilter.org> Link: https://lore.kernel.org/bpf/9f20e2c36f494b3bf177328718367f636bb0b2ab.1719698275.git.lorenzo@kernel.org
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