selftests: net: move xdp_helper to net/lib

Move xdp_helper to net/lib to make it easier for other selftests to use
the helper.

Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://patch.msgid.link/20250425071018.36078-2-minhquangbui99@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/drivers/net/.gitignore

@@ -1,3 +1,2 @@
 # SPDX-License-Identifier: GPL-2.0-only
 napi_id_helper
-xdp_helper

tools/testing/selftests/drivers/net/Makefile

@@ -8,7 +8,6 @@ TEST_INCLUDES := $(wildcard lib/py/*.py) \
 
 TEST_GEN_FILES := \
 	napi_id_helper \
-	xdp_helper \
 # end of TEST_GEN_FILES
 
 TEST_PROGS := \

tools/testing/selftests/drivers/net/napi_id_helper.c

@@ -8,7 +8,7 @@
 #include <arpa/inet.h>
 #include <sys/socket.h>
 
-#include "ksft.h"
+#include "../../net/lib/ksft.h"
 
 int main(int argc, char *argv[])
 {

tools/testing/selftests/drivers/net/queues.py

@@ -26,13 +26,13 @@ def nl_get_queues(cfg, nl, qtype='rx'):
 
 def check_xsk(cfg, nl, xdp_queue_id=0) -> None:
     # Probe for support
-    xdp = cmd(f'{cfg.test_dir / "xdp_helper"} - -', fail=False)
+    xdp = cmd(f'{cfg.net_lib_dir / "xdp_helper"} - -', fail=False)
     if xdp.ret == 255:
         raise KsftSkipEx('AF_XDP unsupported')
     elif xdp.ret > 0:
         raise KsftFailEx('unable to create AF_XDP socket')
 
-    with bkg(f'{cfg.test_dir / "xdp_helper"} {cfg.ifindex} {xdp_queue_id}',
+    with bkg(f'{cfg.net_lib_dir / "xdp_helper"} {cfg.ifindex} {xdp_queue_id}',
              ksft_wait=3):
 
         rx = tx = False

tools/testing/selftests/net/lib/.gitignore

@@ -1,2 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0-only
 csum
+xdp_helper

tools/testing/selftests/net/lib/Makefile

@@ -10,6 +10,7 @@ TEST_FILES += ../../../../net/ynl
 
 TEST_GEN_FILES += csum
 TEST_GEN_FILES += $(patsubst %.c,%.o,$(wildcard *.bpf.c))
+TEST_GEN_FILES += xdp_helper
 
 TEST_INCLUDES := $(wildcard py/*.py sh/*.sh)