The test may fail if not enable DEBUG macro in dev_cgroup.c
# ./test_dev_cgroup
libbpf: load bpf program failed: Operation not permitted
libbpf: failed to load program 'cgroup/dev'
libbpf: failed to load object './dev_cgroup.o'
Failed to load DEV_CGROUP program
Removing the DEBUG macro makes the test always pass.
Signed-off-by: Chen Rong <chenr.fnst@xxxxxxxxxxxxxx>
---
tools/testing/selftests/bpf/dev_cgroup.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/dev_cgroup.c b/tools/testing/selftests/bpf/dev_cgroup.c
index ce41a34..a167c6d 100644
--- a/tools/testing/selftests/bpf/dev_cgroup.c
+++ b/tools/testing/selftests/bpf/dev_cgroup.c
@@ -13,7 +13,6 @@ SEC("cgroup/dev")
int bpf_prog1(struct bpf_cgroup_dev_ctx *ctx)
{
short type = ctx->access_type & 0xFFFF;
-#ifdef DEBUG
short access = ctx->access_type >> 16;
char fmt[] = " %d:%d \n";
@@ -39,7 +38,6 @@ int bpf_prog1(struct bpf_cgroup_dev_ctx *ctx)
fmt[10] = 'm';
bpf_trace_printk(fmt, sizeof(fmt), ctx->major, ctx->minor);
-#endif
/* Allow access to /dev/zero and /dev/random.
* Forbid everything else.
--
2.5.0
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