[PATCH bpf-next v3 4/8] selftests/bpf: pass page size from userspace in map_ptr

[Yauheni Kaliuta <yauheni.kaliuta@xxxxxxxxxx>]

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.

Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@xxxxxxxxxx>
---
 tools/testing/selftests/bpf/prog_tests/map_ptr.c | 15 +++++++++++++--
 tools/testing/selftests/bpf/progs/map_ptr_kern.c |  4 ++--
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/map_ptr.c b/tools/testing/selftests/bpf/prog_tests/map_ptr.c
index c230a573c373..4972f92205c7 100644
--- a/tools/testing/selftests/bpf/prog_tests/map_ptr.c
+++ b/tools/testing/selftests/bpf/prog_tests/map_ptr.c
@@ -12,11 +12,22 @@ void test_map_ptr(void)
 	__u32 duration = 0, retval;
 	char buf[128];
 	int err;
+	int page_size = getpagesize();
 
-	skel = map_ptr_kern__open_and_load();
-	if (CHECK(!skel, "skel_open_load", "open_load failed\n"))
+	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);
 
diff --git a/tools/testing/selftests/bpf/progs/map_ptr_kern.c b/tools/testing/selftests/bpf/progs/map_ptr_kern.c
index d8850bc6a9f1..0e06789ad4d2 100644
--- a/tools/testing/selftests/bpf/progs/map_ptr_kern.c
+++ b/tools/testing/selftests/bpf/progs/map_ptr_kern.c
@@ -12,6 +12,7 @@ _Static_assert(MAX_ENTRIES < LOOP_BOUND, "MAX_ENTRIES must be < LOOP_BOUND");
 
 enum bpf_map_type g_map_type = BPF_MAP_TYPE_UNSPEC;
 __u32 g_line = 0;
+int page_size; /* userspace should set it */
 
 #define VERIFY_TYPE(type, func) ({	\
 	g_map_type = type;		\
@@ -635,7 +636,6 @@ struct bpf_ringbuf_map {
 
 struct {
 	__uint(type, BPF_MAP_TYPE_RINGBUF);
-	__uint(max_entries, 1 << 12);
 } m_ringbuf SEC(".maps");
 
 static inline int check_ringbuf(void)
@@ -643,7 +643,7 @@ static inline int check_ringbuf(void)
 	struct bpf_ringbuf_map *ringbuf = (struct bpf_ringbuf_map *)&m_ringbuf;
 	struct bpf_map *map = (struct bpf_map *)&m_ringbuf;
 
-	VERIFY(check(&ringbuf->map, map, 0, 0, 1 << 12));
+	VERIFY(check(&ringbuf->map, map, 0, 0, page_size));
 
 	return 1;
 }
-- 
2.31.1