From 5ed3ccbd5ac11414d61c16182718e68868becc16 Mon Sep 17 00:00:00 2001 From: Kaixu Xia Date: Wed, 12 Aug 2015 09:37:53 +0000 Subject: bpf: fix build warnings and add function read_trace_pipe() There are two improvements in this patch: 1. Fix the build warnings; 2. Add function read_trace_pipe() to print the result on the screen; Before this patch, we can get the result through /sys/kernel/de bug/tracing/trace_pipe and get nothing on the screen. By applying this patch, the result can be printed on the screen. $ ./tracex6 ... tracex6-705 [003] d..1 131.428593: : CPU-3 19981414 sshd-683 [000] d..1 131.428727: : CPU-0 221682321 sshd-683 [000] d..1 131.428821: : CPU-0 221808766 sshd-683 [000] d..1 131.428950: : CPU-0 221982984 sshd-683 [000] d..1 131.429045: : CPU-0 222111851 tracex6-705 [003] d..1 131.429168: : CPU-3 20757551 sshd-683 [000] d..1 131.429170: : CPU-0 222281240 sshd-683 [000] d..1 131.429261: : CPU-0 222403340 sshd-683 [000] d..1 131.429378: : CPU-0 222561024 ... Signed-off-by: Kaixu Xia Acked-by: Alexei Starovoitov Signed-off-by: David S. Miller --- samples/bpf/tracex6_kern.c | 1 + 1 file changed, 1 insertion(+) (limited to 'samples/bpf/tracex6_kern.c') diff --git a/samples/bpf/tracex6_kern.c b/samples/bpf/tracex6_kern.c index 23d1cffaf249..be479c4af9e2 100644 --- a/samples/bpf/tracex6_kern.c +++ b/samples/bpf/tracex6_kern.c @@ -1,3 +1,4 @@ +#include #include #include #include "bpf_helpers.h" -- cgit v1.2.3