From 35f91d1fe106cd474ac0463157d012c675385e18 Mon Sep 17 00:00:00 2001 From: Song Chen Date: Sat, 2 Apr 2022 16:57:08 +0800 Subject: sample: bpf: syscall_tp_user: Print result of verify_map At the end of the test, we already print out prog : map ids <...> <...> Value is the number read from kernel through bpf map, further print out verify map: val:<...> will help users to understand the program runs successfully. Signed-off-by: Song Chen Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/1648889828-12417-1-git-send-email-chensong_2000@189.cn --- samples/bpf/syscall_tp_user.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'samples') diff --git a/samples/bpf/syscall_tp_user.c b/samples/bpf/syscall_tp_user.c index a0ebf1833ed3..c55383068384 100644 --- a/samples/bpf/syscall_tp_user.c +++ b/samples/bpf/syscall_tp_user.c @@ -36,6 +36,9 @@ static void verify_map(int map_id) fprintf(stderr, "failed: map #%d returns value 0\n", map_id); return; } + + printf("verify map:%d val: %d\n", map_id, val); + val = 0; if (bpf_map_update_elem(map_id, &key, &val, BPF_ANY) != 0) { fprintf(stderr, "map_update failed: %s\n", strerror(errno)); -- cgit v1.2.3