[PATCH 4/3] selftests/hid: more fixes to build with older kernel

[Justin Stitt]

I had to use the clever trick [1] on some other symbols to get my builds
working.

Apply this patch on top of Benjamin's series [2].

This is now a n=4 patch series which has fixed my builds when running:
| $ make LLVM=1 -j128 ARCH=x86_64 mrproper headers
| $ make LLVM=1 -j128 ARCH=x86_64 -C tools/testing/selftests TARGETS=hid

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/testing/selftests/bpf/progs/bpf_iter.h#n3
[2]: https://lore.kernel.org/all/20230825-wip-selftests-v1-0-c862769020a8@xxxxxxxxxx/
Signed-off-by: Justin Stitt <justinstitt@xxxxxxxxxx>
---
 .../selftests/hid/progs/hid_bpf_helpers.h     | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/tools/testing/selftests/hid/progs/hid_bpf_helpers.h b/tools/testing/selftests/hid/progs/hid_bpf_helpers.h
index 749097f8f4d9..e2eace2c0029 100644
--- a/tools/testing/selftests/hid/progs/hid_bpf_helpers.h
+++ b/tools/testing/selftests/hid/progs/hid_bpf_helpers.h
@@ -7,12 +7,26 @@

 /* "undefine" structs in vmlinux.h, because we "override" them below */
 #define hid_bpf_ctx hid_bpf_ctx___not_used
+#define hid_report_type hid_report_type___not_used
+#define hid_class_request hid_class_request___not_used
+#define hid_bpf_attach_flags hid_bpf_attach_flags___not_used
 #include "vmlinux.h"
 #undef hid_bpf_ctx
+#undef hid_report_type
+#undef hid_class_request
+#undef hid_bpf_attach_flags

 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_tracing.h>
+#include <linux/const.h>

+enum hid_report_type {
+	HID_INPUT_REPORT		= 0,
+	HID_OUTPUT_REPORT		= 1,
+	HID_FEATURE_REPORT		= 2,
+
+	HID_REPORT_TYPES,
+};

 struct hid_bpf_ctx {
 	__u32 index;
@@ -25,6 +39,21 @@ struct hid_bpf_ctx {
 	};
 };

+enum hid_class_request {
+	HID_REQ_GET_REPORT		= 0x01,
+	HID_REQ_GET_IDLE		= 0x02,
+	HID_REQ_GET_PROTOCOL		= 0x03,
+	HID_REQ_SET_REPORT		= 0x09,
+	HID_REQ_SET_IDLE		= 0x0A,
+	HID_REQ_SET_PROTOCOL		= 0x0B,
+};
+
+enum hid_bpf_attach_flags {
+	HID_BPF_FLAG_NONE = 0,
+	HID_BPF_FLAG_INSERT_HEAD = _BITUL(0),
+	HID_BPF_FLAG_MAX,
+};
+
 /* following are kfuncs exported by HID for HID-BPF */
 extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx,
 			      unsigned int offset,
--
2.42.0.rc1.204.g551eb34607-goog