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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
#include <test_progs.h>
#include "test_global_func1.skel.h"
#include "test_global_func2.skel.h"
#include "test_global_func3.skel.h"
#include "test_global_func4.skel.h"
#include "test_global_func5.skel.h"
#include "test_global_func6.skel.h"
#include "test_global_func7.skel.h"
#include "test_global_func8.skel.h"
#include "test_global_func9.skel.h"
#include "test_global_func10.skel.h"
#include "test_global_func11.skel.h"
#include "test_global_func12.skel.h"
#include "test_global_func13.skel.h"
#include "test_global_func14.skel.h"
#include "test_global_func15.skel.h"
#include "test_global_func16.skel.h"
#include "test_global_func17.skel.h"
#include "test_global_func_ctx_args.skel.h"
#include "bpf/libbpf_internal.h"
#include "btf_helpers.h"
static void check_ctx_arg_type(const struct btf *btf, const struct btf_param *p)
{
const struct btf_type *t;
const char *s;
t = btf__type_by_id(btf, p->type);
if (!ASSERT_EQ(btf_kind(t), BTF_KIND_PTR, "ptr_t"))
return;
s = btf_type_raw_dump(btf, t->type);
if (!ASSERT_HAS_SUBSTR(s, "STRUCT 'bpf_perf_event_data' size=0 vlen=0",
"ctx_struct_t"))
return;
}
static void subtest_ctx_arg_rewrite(void)
{
struct test_global_func_ctx_args *skel = NULL;
struct bpf_prog_info info;
char func_info_buf[1024] __attribute__((aligned(8)));
struct bpf_func_info_min *rec;
struct btf *btf = NULL;
__u32 info_len = sizeof(info);
int err, fd, i;
skel = test_global_func_ctx_args__open();
if (!ASSERT_OK_PTR(skel, "skel_open"))
return;
bpf_program__set_autoload(skel->progs.arg_tag_ctx_perf, true);
err = test_global_func_ctx_args__load(skel);
if (!ASSERT_OK(err, "skel_load"))
goto out;
memset(&info, 0, sizeof(info));
info.func_info = ptr_to_u64(&func_info_buf);
info.nr_func_info = 3;
info.func_info_rec_size = sizeof(struct bpf_func_info_min);
fd = bpf_program__fd(skel->progs.arg_tag_ctx_perf);
err = bpf_prog_get_info_by_fd(fd, &info, &info_len);
if (!ASSERT_OK(err, "prog_info"))
goto out;
if (!ASSERT_EQ(info.nr_func_info, 3, "nr_func_info"))
goto out;
btf = btf__load_from_kernel_by_id(info.btf_id);
if (!ASSERT_OK_PTR(btf, "obj_kern_btf"))
goto out;
rec = (struct bpf_func_info_min *)func_info_buf;
for (i = 0; i < info.nr_func_info; i++, rec = (void *)rec + info.func_info_rec_size) {
const struct btf_type *fn_t, *proto_t;
const char *name;
if (rec->insn_off == 0)
continue; /* main prog, skip */
fn_t = btf__type_by_id(btf, rec->type_id);
if (!ASSERT_OK_PTR(fn_t, "fn_type"))
goto out;
if (!ASSERT_EQ(btf_kind(fn_t), BTF_KIND_FUNC, "fn_type_kind"))
goto out;
proto_t = btf__type_by_id(btf, fn_t->type);
if (!ASSERT_OK_PTR(proto_t, "proto_type"))
goto out;
name = btf__name_by_offset(btf, fn_t->name_off);
if (strcmp(name, "subprog_ctx_tag") == 0) {
/* int subprog_ctx_tag(void *ctx __arg_ctx) */
if (!ASSERT_EQ(btf_vlen(proto_t), 1, "arg_cnt"))
goto out;
/* arg 0 is PTR -> STRUCT bpf_perf_event_data */
check_ctx_arg_type(btf, &btf_params(proto_t)[0]);
} else if (strcmp(name, "subprog_multi_ctx_tags") == 0) {
/* int subprog_multi_ctx_tags(void *ctx1 __arg_ctx,
* struct my_struct *mem,
* void *ctx2 __arg_ctx)
*/
if (!ASSERT_EQ(btf_vlen(proto_t), 3, "arg_cnt"))
goto out;
/* arg 0 is PTR -> STRUCT bpf_perf_event_data */
check_ctx_arg_type(btf, &btf_params(proto_t)[0]);
/* arg 2 is PTR -> STRUCT bpf_perf_event_data */
check_ctx_arg_type(btf, &btf_params(proto_t)[2]);
} else {
ASSERT_FAIL("unexpected subprog %s", name);
goto out;
}
}
out:
btf__free(btf);
test_global_func_ctx_args__destroy(skel);
}
void test_test_global_funcs(void)
{
RUN_TESTS(test_global_func1);
RUN_TESTS(test_global_func2);
RUN_TESTS(test_global_func3);
RUN_TESTS(test_global_func4);
RUN_TESTS(test_global_func5);
RUN_TESTS(test_global_func6);
RUN_TESTS(test_global_func7);
RUN_TESTS(test_global_func8);
RUN_TESTS(test_global_func9);
RUN_TESTS(test_global_func10);
RUN_TESTS(test_global_func11);
RUN_TESTS(test_global_func12);
RUN_TESTS(test_global_func13);
RUN_TESTS(test_global_func14);
RUN_TESTS(test_global_func15);
RUN_TESTS(test_global_func16);
RUN_TESTS(test_global_func17);
RUN_TESTS(test_global_func_ctx_args);
if (test__start_subtest("ctx_arg_rewrite"))
subtest_ctx_arg_rewrite();
}
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