Commit 15ea164e authored May 14, 2019 by Stanislav Fomichev Committed by Daniel Borkmann May 16, 2019

libbpf: don't fail when feature probing fails



Otherwise libbpf is unusable from unprivileged process with
kernel.kernel.unprivileged_bpf_disabled=1.
All I get is EPERM from the probes, even if I just want to
open an ELF object and look at what progs/maps it has.

Instead of dying on probes, let's just pr_debug the error and
try to continue.

Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

parent 5db17c96

tools/lib/bpf/libbpf.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1696,7 +1696,7 @@ bpf_object__probe_caps(struct bpf_object *obj)
		for (i = 0; i < ARRAY_SIZE(probe_fn); i++) {
		ret = probe_fn[i](obj);
		if (ret < 0)
		return ret;
		pr_debug("Probe #%d failed with %d.\n", i, ret);
		}

		return 0;