On Fri, Aug 25, 2023 at 10:36:30AM +0200, Benjamin Tissoires wrote: > These fixes have been triggered by [0]: > basically, if you do not recompile the kernel first, and are > running on an old kernel, vmlinux.h doesn't have the required > symbols and the compilation fails. > > The tests will fail if you run them on that very same machine, > of course, but the binary should compile. > > And while I was sorting out why it was failing, I realized I > could do a couple of improvements on the Makefile. > > [0] https://lore.kernel.org/linux-input/56ba8125-2c6f-a9c9-d498-0ca1c153dcb2@xxxxxxxxxx/T/#t > > Signed-off-by: Benjamin Tissoires <bentiss@xxxxxxxxxx> > --- > Benjamin Tissoires (3): > selftests/hid: ensure we can compile the tests on kernels pre-6.3 > selftests/hid: do not manually call headers_install > selftests/hid: force using our compiled libbpf headers > > tools/testing/selftests/hid/Makefile | 10 ++++------ > tools/testing/selftests/hid/progs/hid.c | 3 --- > tools/testing/selftests/hid/progs/hid_bpf_helpers.h | 20 ++++++++++++++++++++ > 3 files changed, 24 insertions(+), 9 deletions(-) > --- > base-commit: 1d7546042f8fdc4bc39ab91ec966203e2d64f8bd > change-id: 20230825-wip-selftests-9a7502b56542 > > Best regards, > -- > Benjamin Tissoires <bentiss@xxxxxxxxxx> > Benjamin, thanks for the work here. Your series fixed up _some_ of the errors I had while building on my 6.3.11 kernel. I'm proposing a single patch that should be applied on top of your series that fully fixes _all_ of the build errors I'm experiencing. Can you let me know if it works and potentially formulate a new series so that `b4 shazam` applies it cleanly? PATCH BELOW --- >From 5378d70e1b3f7f75656332f9bff65a37122bb288 Mon Sep 17 00:00:00 2001 From: Justin Stitt <justinstitt@xxxxxxxxxx> Date: Fri, 25 Aug 2023 18:10:33 +0000 Subject: [PATCH 4/3] selftests/hid: more fixes to build with older kernel 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
