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authorJohn Fastabend <john.fastabend@gmail.com>2017-07-17 09:28:56 -0700
committerDavid S. Miller <davem@davemloft.net>2017-07-17 09:48:06 -0700
commit546ac1ffb70d25b56c1126940e5ec639c4dd7413 (patch)
treeee72376133d162b6bacd60cc6c061458a76be88c /tools/testing/selftests/ptrace
parent5acaee0a8964c9bab7775ab8bedcd1f66a2a1011 (diff)
bpf: add devmap, a map for storing net device references
Device map (devmap) is a BPF map, primarily useful for networking applications, that uses a key to lookup a reference to a netdevice. The map provides a clean way for BPF programs to build virtual port to physical port maps. Additionally, it provides a scoping function for the redirect action itself allowing multiple optimizations. Future patches will leverage the map to provide batching at the XDP layer. Another optimization/feature, that is not yet implemented, would be to support multiple netdevices per key to support efficient multicast and broadcast support. Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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