Hi, This patchset is a new implementation for XDP multicast support based on my previous 2 maps implementation[1]. The reason is that Daniel think the exclude map implementation is missing proper bond support in XDP context. And there is a plan to add native XDP bonding support. Adding a exclude map in the helper also increase the complex of verifier and has draw back of performace. The new implementation just add two new flags BPF_F_BROADCAST and BPF_F_EXCLUDE_INGRESS to extend xdp_redirect_map for broadcast support. With BPF_F_BROADCAST the packet will be broadcasted to all the interfaces in the map. with BPF_F_EXCLUDE_INGRESS the ingress interface will be excluded when do broadcasting. The patchv4 link is here[2]. [1] https://lore.kernel.org/bpf/20210223125809.1376577-1-liuhangbin@xxxxxxxxx [2] https://lore.kernel.org/bpf/20210402121954.3568992-1-liuhangbin@xxxxxxxxx v5: Just walk the map directly to get interfaces as get_next_key() of devmap hash may restart looping from the first key if the device get removed v4: Fix flags never cleared issue in patch 02. Update selftest to cover this. v3: Rebase the code based on latest bpf-next v2: fix flag renaming issue in patch 02 Hangbin Liu (3): xdp: extend xdp_redirect_map with broadcast support sample/bpf: add xdp_redirect_map_multi for redirect_map broadcast test selftests/bpf: add xdp_redirect_multi test Jesper Dangaard Brouer (1): bpf: run devmap xdp_prog on flush instead of bulk enqueue include/linux/bpf.h | 20 ++ include/linux/filter.h | 18 +- include/net/xdp.h | 1 + include/uapi/linux/bpf.h | 17 +- kernel/bpf/cpumap.c | 3 +- kernel/bpf/devmap.c | 295 ++++++++++++++--- net/core/filter.c | 33 +- net/core/xdp.c | 29 ++ net/xdp/xskmap.c | 3 +- samples/bpf/Makefile | 3 + samples/bpf/xdp_redirect_map_multi_kern.c | 87 +++++ samples/bpf/xdp_redirect_map_multi_user.c | 302 ++++++++++++++++++ tools/include/uapi/linux/bpf.h | 17 +- tools/testing/selftests/bpf/Makefile | 3 +- .../bpf/progs/xdp_redirect_multi_kern.c | 99 ++++++ .../selftests/bpf/test_xdp_redirect_multi.sh | 205 ++++++++++++ .../selftests/bpf/xdp_redirect_multi.c | 236 ++++++++++++++ 17 files changed, 1307 insertions(+), 64 deletions(-) create mode 100644 samples/bpf/xdp_redirect_map_multi_kern.c create mode 100644 samples/bpf/xdp_redirect_map_multi_user.c create mode 100644 tools/testing/selftests/bpf/progs/xdp_redirect_multi_kern.c create mode 100755 tools/testing/selftests/bpf/test_xdp_redirect_multi.sh create mode 100644 tools/testing/selftests/bpf/xdp_redirect_multi.c -- 2.26.3
