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authorDaniel Borkmann <daniel@iogearbox.net>2021-03-10 01:06:34 +0100
committerDaniel Borkmann <daniel@iogearbox.net>2021-03-10 01:07:21 +0100
commit32f91529e2bdbe0d92edb3ced41dfba4beffa84a (patch)
tree2e6ca2aa0d6d1ac694002dd4aff11915473d4118 /init
parent11d39cfeecfc9d92a5faa2a55c228e796478e0cb (diff)
parentee75aef23afe6e88497151c127c13ed69f41aaa2 (diff)
Merge branch 'bpf-xdp-redirect'
Björn Töpel says: ==================== This two patch series contain two optimizations for the bpf_redirect_map() helper and the xdp_do_redirect() function. The bpf_redirect_map() optimization is about avoiding the map lookup dispatching. Instead of having a switch-statement and selecting the correct lookup function, we let bpf_redirect_map() be a map operation, where each map has its own bpf_redirect_map() implementation. This way the run-time lookup is avoided. The xdp_do_redirect() patch restructures the code, so that the map pointer indirection can be avoided. Performance-wise I got 4% improvement for XSKMAP (sample:xdpsock/rx-drop), and 8% (sample:xdp_redirect_map) on my machine. v5->v6: Removed REDIR enum, and instead use map_id and map_type. (Daniel) Applied Daniel's fixups on patch 1. (Daniel) v4->v5: Renamed map operation to map_redirect. (Daniel) v3->v4: Made bpf_redirect_map() a map operation. (Daniel) v2->v3: Fix build when CONFIG_NET is not set. (lkp) v1->v2: Removed warning when CONFIG_BPF_SYSCALL was not set. (lkp) Cleaned up case-clause in xdp_do_generic_redirect_map(). (Toke) Re-added comment. (Toke) rfc->v1: Use map_id, and remove bpf_clear_redirect_map(). (Toke) Get rid of the macro and use __always_inline. (Jesper) ==================== Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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