From 817b89beb9d8876450fcde9155e17425c329569d Mon Sep 17 00:00:00 2001 From: Jesper Dangaard Brouer Date: Wed, 15 Aug 2018 16:57:14 +0200 Subject: [PATCH] samples/bpf: all XDP samples should unload xdp/bpf prog on SIGTERM It is common XDP practice to unload/deattach the XDP bpf program, when the XDP sample program is Ctrl-C interrupted (SIGINT) or killed (SIGTERM). The samples/bpf programs xdp_redirect_cpu and xdp_rxq_info, forgot to trap signal SIGTERM (which is the default signal used by the kill command). This was discovered by Red Hat QA, which automated scripts depend on killing the XDP sample program after a timeout period. Fixes: fad3917e361b ("samples/bpf: add cpumap sample program xdp_redirect_cpu") Fixes: 0fca931a6f21 ("samples/bpf: program demonstrating access to xdp_rxq_info") Reported-by: Jean-Tsung Hsiao Signed-off-by: Jesper Dangaard Brouer Acked-by: Yonghong Song Signed-off-by: Daniel Borkmann --- samples/bpf/xdp_redirect_cpu_user.c | 3 ++- samples/bpf/xdp_rxq_info_user.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/samples/bpf/xdp_redirect_cpu_user.c b/samples/bpf/xdp_redirect_cpu_user.c index 9a6c7e0a6dd1..2d23054aaccf 100644 --- a/samples/bpf/xdp_redirect_cpu_user.c +++ b/samples/bpf/xdp_redirect_cpu_user.c @@ -679,8 +679,9 @@ int main(int argc, char **argv) return EXIT_FAIL_OPTION; } - /* Remove XDP program when program is interrupted */ + /* Remove XDP program when program is interrupted or killed */ signal(SIGINT, int_exit); + signal(SIGTERM, int_exit); if (bpf_set_link_xdp_fd(ifindex, prog_fd[prog_num], xdp_flags) < 0) { fprintf(stderr, "link set xdp fd failed\n"); diff --git a/samples/bpf/xdp_rxq_info_user.c b/samples/bpf/xdp_rxq_info_user.c index 248a7eab9531..ef26f882f92f 100644 --- a/samples/bpf/xdp_rxq_info_user.c +++ b/samples/bpf/xdp_rxq_info_user.c @@ -567,8 +567,9 @@ int main(int argc, char **argv) exit(EXIT_FAIL_BPF); } - /* Remove XDP program when program is interrupted */ + /* Remove XDP program when program is interrupted or killed */ signal(SIGINT, int_exit); + signal(SIGTERM, int_exit); if (bpf_set_link_xdp_fd(ifindex, prog_fd, xdp_flags) < 0) { fprintf(stderr, "link set xdp fd failed\n");