Allow forcing the seed of a hash table to zero, for deterministic execution during benchmarking and testing. Changes from v2: * Change ordering of BPF_F_ZERO_SEED in linux/bpf.h Comments adressed from v1: * Add comment to discourage production use to linux/bpf.h * Require CAP_SYS_ADMIN Lorenz Bauer (4): bpf: allow zero-initializing hash map seed bpf: move BPF_F_QUERY_EFFECTIVE after map flags tools: sync linux/bpf.h tools: add selftest for BPF_F_ZERO_SEED include/uapi/linux/bpf.h | 9 ++-- kernel/bpf/hashtab.c | 13 ++++- tools/include/uapi/linux/bpf.h | 13 +++-- tools/testing/selftests/bpf/test_maps.c | 68 +++++++++++++++++++++---- 4 files changed, 84 insertions(+), 19 deletions(-) -- 2.17.1
