[PATCH bpf-next v2 18/31] selftests/bpf: Fix sk_assign on s390x

[Ilya Leoshkevich <iii@xxxxxxxxxxxxx>]

sk_assign is failing on an s390x machine running Debian "bookworm" for
2 reasons: legacy server_map definition and uninitialized addrlen in
recvfrom() call.

Fix by upgrading the server_map definition and dropping addrlen
(recvfrom() allows NULL values for src_addr and addrlen).

Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
---
 .../selftests/bpf/prog_tests/sk_assign.c      |  5 +---
 .../selftests/bpf/progs/test_sk_assign.c      | 24 +++++--------------
 2 files changed, 7 insertions(+), 22 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/sk_assign.c b/tools/testing/selftests/bpf/prog_tests/sk_assign.c
index 3e190ed63976..ba99dce1db0d 100644
--- a/tools/testing/selftests/bpf/prog_tests/sk_assign.c
+++ b/tools/testing/selftests/bpf/prog_tests/sk_assign.c
@@ -129,15 +129,12 @@ get_port(int fd)
 static ssize_t
 rcv_msg(int srv_client, int type)
 {
-	struct sockaddr_storage ss;
 	char buf[BUFSIZ];
-	socklen_t slen;
 
 	if (type == SOCK_STREAM)
 		return read(srv_client, &buf, sizeof(buf));
 	else
-		return recvfrom(srv_client, &buf, sizeof(buf), 0,
-				(struct sockaddr *)&ss, &slen);
+		return recvfrom(srv_client, &buf, sizeof(buf), 0, NULL, NULL);
 }
 
 static int
diff --git a/tools/testing/selftests/bpf/progs/test_sk_assign.c b/tools/testing/selftests/bpf/progs/test_sk_assign.c
index 98c6493d9b91..13ba4dd2d19f 100644
--- a/tools/testing/selftests/bpf/progs/test_sk_assign.c
+++ b/tools/testing/selftests/bpf/progs/test_sk_assign.c
@@ -16,25 +16,13 @@
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_endian.h>
 
-/* Pin map under /sys/fs/bpf/tc/globals/<map name> */
-#define PIN_GLOBAL_NS 2
-
-/* Must match struct bpf_elf_map layout from iproute2 */
 struct {
-	__u32 type;
-	__u32 size_key;
-	__u32 size_value;
-	__u32 max_elem;
-	__u32 flags;
-	__u32 id;
-	__u32 pinning;
-} server_map SEC("maps") = {
-	.type = BPF_MAP_TYPE_SOCKMAP,
-	.size_key = sizeof(int),
-	.size_value  = sizeof(__u64),
-	.max_elem = 1,
-	.pinning = PIN_GLOBAL_NS,
-};
+	__uint(type, BPF_MAP_TYPE_SOCKMAP);
+	__type(key, int);
+	__type(value, __u64);
+	__uint(pinning, LIBBPF_PIN_BY_NAME);
+	__uint(max_entries, 1);
+} server_map SEC(".maps");
 
 char _license[] SEC("license") = "GPL";
 
-- 
2.39.1