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selftests/bpf: test_progs/sockopt_sk: Convert to use BPF skeleton

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Switch the test to use BPF skeleton to save some boilerplate and
make it easy to access bpf program bss segment.

The latter will be used to pass PAGE_SIZE from userspace since there
is no convenient way for bpf program to get it from inside of the
kernel.

Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210408061310.95877-2-yauheni.kaliuta@redhat.com
This commit is contained in:
Yauheni Kaliuta 2021-04-08 09:13:03 +03:00 committed by Andrii Nakryiko
parent ff182bc572
commit cad99cce13
1 changed files with 16 additions and 47 deletions
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63
tools/testing/selftests/bpf/prog_tests/sockopt_sk.c
View file

@ -3,6 +3,7 @@
#include "cgroup_helpers.h"
#include <linux/tcp.h>
#include "sockopt_sk.skel.h"
#ifndef SOL_TCP
#define SOL_TCP IPPROTO_TCP
@ -191,60 +192,28 @@ static int getsetsockopt(void)
return -1;
}
static int prog_attach(struct bpf_object *obj, int cgroup_fd, const char *title)
{
enum bpf_attach_type attach_type;
enum bpf_prog_type prog_type;
struct bpf_program *prog;
int err;
err = libbpf_prog_type_by_name(title, &prog_type, &attach_type);
if (err) {
log_err("Failed to deduct types for %s BPF program", title);
return -1;
}
prog = bpf_object__find_program_by_title(obj, title);
if (!prog) {
log_err("Failed to find %s BPF program", title);
return -1;
}
err = bpf_prog_attach(bpf_program__fd(prog), cgroup_fd,
attach_type, 0);
if (err) {
log_err("Failed to attach %s BPF program", title);
return -1;
}
return 0;
}
static void run_test(int cgroup_fd)
{
struct bpf_prog_load_attr attr = {
.file = "./sockopt_sk.o",
};
struct bpf_object *obj;
int ignored;
int err;
struct sockopt_sk *skel;
err = bpf_prog_load_xattr(&attr, &obj, &ignored);
if (CHECK_FAIL(err))
return;
skel = sockopt_sk__open_and_load();
if (!ASSERT_OK_PTR(skel, "skel_load"))
goto cleanup;
err = prog_attach(obj, cgroup_fd, "cgroup/getsockopt");
if (CHECK_FAIL(err))
goto close_bpf_object;
skel->links._setsockopt =
bpf_program__attach_cgroup(skel->progs._setsockopt, cgroup_fd);
if (!ASSERT_OK_PTR(skel->links._setsockopt, "setsockopt_link"))
goto cleanup;
err = prog_attach(obj, cgroup_fd, "cgroup/setsockopt");
if (CHECK_FAIL(err))
goto close_bpf_object;
skel->links._getsockopt =
bpf_program__attach_cgroup(skel->progs._getsockopt, cgroup_fd);
if (!ASSERT_OK_PTR(skel->links._getsockopt, "getsockopt_link"))
goto cleanup;
CHECK_FAIL(getsetsockopt());
ASSERT_OK(getsetsockopt(), "getsetsockopt");
close_bpf_object:
bpf_object__close(obj);
cleanup:
sockopt_sk__destroy(skel);
}
void test_sockopt_sk(void)