selftests/bpf: Add ingress tests for txmsg with apply_bytes

Currently, the ingress redirect is not covered in "txmsg test apply".
Signed-off-by: Pengcheng Yang <yangpc@wangsu.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/1669718441-2654-5-git-send-email-yangpc@wangsu.com

tools/testing/selftests/bpf/test_sockmap.c

@@ -1690,24 +1690,42 @@ static void test_txmsg_apply(int cgrp, struct sockmap_options *opt)
 {
 	txmsg_pass = 1;
 	txmsg_redir = 0;
+	txmsg_ingress = 0;
 	txmsg_apply = 1;
 	txmsg_cork = 0;
 	test_send_one(opt, cgrp);
 
 	txmsg_pass = 0;
 	txmsg_redir = 1;
+	txmsg_ingress = 0;
+	txmsg_apply = 1;
+	txmsg_cork = 0;
+	test_send_one(opt, cgrp);
+
+	txmsg_pass = 0;
+	txmsg_redir = 1;
+	txmsg_ingress = 1;
 	txmsg_apply = 1;
 	txmsg_cork = 0;
 	test_send_one(opt, cgrp);
 
 	txmsg_pass = 1;
 	txmsg_redir = 0;
+	txmsg_ingress = 0;
+	txmsg_apply = 1024;
+	txmsg_cork = 0;
+	test_send_large(opt, cgrp);
+
+	txmsg_pass = 0;
+	txmsg_redir = 1;
+	txmsg_ingress = 0;
 	txmsg_apply = 1024;
 	txmsg_cork = 0;
 	test_send_large(opt, cgrp);
 
 	txmsg_pass = 0;
 	txmsg_redir = 1;
+	txmsg_ingress = 1;
 	txmsg_apply = 1024;
 	txmsg_cork = 0;
 	test_send_large(opt, cgrp);