selftests/bpf: Migrate test_xdp_redirect.c to test_xdp_do_redirect.c

prog_tests/xdp_do_redirect.c is the only user of the BPF programs
located in progs/test_xdp_do_redirect.c and progs/test_xdp_redirect.c.
There is no need to keep both files with such close names.

Move test_xdp_redirect.c contents to test_xdp_do_redirect.c and remove
progs/test_xdp_redirect.c

Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@bootlin.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20250110-xdp_redirect-v2-3-b8f3ae53e894@bootlin.com

Author: bastien-curutchet

tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c

@@ -11,7 +11,6 @@
 #include <bpf/bpf_endian.h>
 #include <uapi/linux/netdev.h>
 #include "test_xdp_do_redirect.skel.h"
-#include "test_xdp_redirect.skel.h"
 #include "xdp_dummy.skel.h"
 
 struct udp_packet {
@@ -324,7 +323,7 @@ static int ping_setup(struct test_data *data)
 
 static void ping_test(struct test_data *data)
 {
-	struct test_xdp_redirect *skel = NULL;
+	struct test_xdp_do_redirect *skel = NULL;
 	struct xdp_dummy *skel_dummy = NULL;
 	struct nstoken *nstoken = NULL;
 	int i, ret;
@@ -351,7 +350,7 @@ static void ping_test(struct test_data *data)
 		nstoken = NULL;
 	}
 
-	skel = test_xdp_redirect__open_and_load();
+	skel = test_xdp_do_redirect__open_and_load();
 	if (!ASSERT_OK_PTR(skel, "open and load skeleton"))
 		goto close;
 
@@ -383,7 +382,7 @@ static void ping_test(struct test_data *data)
 close:
 	close_netns(nstoken);
 	xdp_dummy__destroy(skel_dummy);
-	test_xdp_redirect__destroy(skel);
+	test_xdp_do_redirect__destroy(skel);
 }
 
 

tools/testing/selftests/bpf/progs/test_xdp_do_redirect.c

@@ -98,6 +98,18 @@ int xdp_count_pkts(struct xdp_md *xdp)
 	return XDP_DROP;
 }
 
+SEC("xdp")
+int xdp_redirect_to_111(struct xdp_md *xdp)
+{
+	return bpf_redirect(111, 0);
+}
+
+SEC("xdp")
+int xdp_redirect_to_222(struct xdp_md *xdp)
+{
+	return bpf_redirect(222, 0);
+}
+
 SEC("tc")
 int tc_count_pkts(struct __sk_buff *skb)
 {