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selftests/bpf: Stop using bpf_program__load

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bpf_program__load is not supposed to be used directly. Replace it with
bpf_object__ APIs for the reference_tracking prog_test, which is the
last offender in bpf selftests.

Some additional complexity is added for this test, namely the use of one
bpf_object to iterate through progs, while a second bpf_object is
created and opened/closed to test actual loading of progs. This is
because the test was doing bpf_program__load then __unload to test
loading of individual progs and same semantics with
bpf_object__load/__unload result in failure to load an __unload-ed obj.

Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210917182911.2426606-3-davemarchevsky@fb.com
This commit is contained in:
Dave Marchevsky 2021-09-17 11:29:04 -07:00 committed by Alexei Starovoitov
parent 335ff4990c
commit 84b4c52960
1 changed files with 31 additions and 8 deletions
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39
tools/testing/selftests/bpf/prog_tests/reference_tracking.c
View File

@ -1,6 +1,21 @@
// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
static void toggle_object_autoload_progs(const struct bpf_object *obj,
const char *title_load)
{
struct bpf_program *prog;
bpf_object__for_each_program(prog, obj) {
const char *title = bpf_program__section_name(prog);
if (!strcmp(title_load, title))
bpf_program__set_autoload(prog, true);
else
bpf_program__set_autoload(prog, false);
}
}
void test_reference_tracking(void)
{
const char *file = "test_sk_lookup_kern.o";
@ -9,21 +24,21 @@ void test_reference_tracking(void)
.object_name = obj_name,
.relaxed_maps = true,
);
struct bpf_object *obj;
struct bpf_object *obj_iter, *obj = NULL;
struct bpf_program *prog;
__u32 duration = 0;
int err = 0;
obj = bpf_object__open_file(file, &open_opts);
if (!ASSERT_OK_PTR(obj, "obj_open_file"))
obj_iter = bpf_object__open_file(file, &open_opts);
if (!ASSERT_OK_PTR(obj_iter, "obj_iter_open_file"))
return;
if (CHECK(strcmp(bpf_object__name(obj), obj_name), "obj_name",
if (CHECK(strcmp(bpf_object__name(obj_iter), obj_name), "obj_name",
"wrong obj name '%s', expected '%s'\n",
bpf_object__name(obj), obj_name))
bpf_object__name(obj_iter), obj_name))
goto cleanup;
bpf_object__for_each_program(prog, obj) {
bpf_object__for_each_program(prog, obj_iter) {
const char *title;
/* Ignore .text sections */
@ -34,19 +49,27 @@ void test_reference_tracking(void)
if (!test__start_subtest(title))
continue;
obj = bpf_object__open_file(file, &open_opts);
if (!ASSERT_OK_PTR(obj, "obj_open_file"))
goto cleanup;
toggle_object_autoload_progs(obj, title);
/* Expect verifier failure if test name has 'err' */
if (strstr(title, "err_") != NULL) {
libbpf_print_fn_t old_print_fn;
old_print_fn = libbpf_set_print(NULL);
err = !bpf_program__load(prog, "GPL", 0);
err = !bpf_object__load(obj);
libbpf_set_print(old_print_fn);
} else {
err = bpf_program__load(prog, "GPL", 0);
err = bpf_object__load(obj);
}
CHECK(err, title, "\n");
bpf_object__close(obj);
obj = NULL;
}
cleanup:
bpf_object__close(obj);
bpf_object__close(obj_iter);
}