From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lorenz Bauer Subject: [PATCH v2 0/3] bpf: allow zero-initialising hash map seed Date: Mon, 8 Oct 2018 11:32:18 +0100 Message-ID: <20181008103221.13468-1-lmb@cloudflare.com> References: <20181001104509.24211-1-lmb@cloudflare.com> Return-path: In-Reply-To: <20181001104509.24211-1-lmb@cloudflare.com> Sender: netdev-owner@vger.kernel.org To: ast@kernel.org, daniel@iogearbox.net Cc: netdev@vger.kernel.org, linux-api@vger.kernel.org, Lorenz Bauer List-Id: linux-api@vger.kernel.org Allow forcing the seed of a hash table to zero, for deterministic execution during benchmarking and testing. Comments adressed from v1: * Add comment to discourage production use to linux/bpf.h * Require CAP_SYS_ADMIN Lorenz Bauer (3): bpf: allow zero-initializing hash map seed tools: sync linux/bpf.h tools: add selftest for BPF_F_ZERO_SEED include/uapi/linux/bpf.h | 2 + kernel/bpf/hashtab.c | 13 ++++- tools/include/uapi/linux/bpf.h | 2 + tools/testing/selftests/bpf/test_maps.c | 68 +++++++++++++++++++++---- 4 files changed, 72 insertions(+), 13 deletions(-) -- 2.17.1