linux-stable/tools/testing/selftests/bpf/prog_tests/map_ptr.c
Yauheni Kaliuta 7a85e4dfa7 selftests/bpf: Pass page size from userspace in map_ptr
Use ASSERT to check result but keep CHECK where format was used to
report error.

Use bpf_map__set_max_entries() to set map size dynamically from
userspace according to page size.

Zero-initialize the variable in bpf prog, otherwise it will cause
problems on some versions of Clang.

Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210408061310.95877-4-yauheni.kaliuta@redhat.com
2021-04-08 23:54:47 -07:00

43 lines
1,010 B
C

// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 Facebook
#include <test_progs.h>
#include <network_helpers.h>
#include "map_ptr_kern.skel.h"
void test_map_ptr(void)
{
struct map_ptr_kern *skel;
__u32 duration = 0, retval;
char buf[128];
int err;
int page_size = getpagesize();
skel = map_ptr_kern__open();
if (!ASSERT_OK_PTR(skel, "skel_open"))
return;
err = bpf_map__set_max_entries(skel->maps.m_ringbuf, page_size);
if (!ASSERT_OK(err, "bpf_map__set_max_entries"))
goto cleanup;
err = map_ptr_kern__load(skel);
if (!ASSERT_OK(err, "skel_load"))
goto cleanup;
skel->bss->page_size = page_size;
err = bpf_prog_test_run(bpf_program__fd(skel->progs.cg_skb), 1, &pkt_v4,
sizeof(pkt_v4), buf, NULL, &retval, NULL);
if (CHECK(err, "test_run", "err=%d errno=%d\n", err, errno))
goto cleanup;
if (CHECK(!retval, "retval", "retval=%d map_type=%u line=%u\n", retval,
skel->bss->g_map_type, skel->bss->g_line))
goto cleanup;
cleanup:
map_ptr_kern__destroy(skel);
}