[PATCH bpf-next v2 11/28] samples/bpf: add a report descriptor fixup
flat view
STALE1670d
From: Benjamin Tissoires <hidden>
Date: 2022-03-04 17:32:39
Also in:
bpf, linux-input, linux-kselftest, lkml
Subsystem:
bpf [general] (safe dynamic programs and tools), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
Revision v2 of 9 in this series.
Revisions (9)
the program inverts the definition of X and Y at a given place in the report descriptor of my mouse. Signed-off-by: Benjamin Tissoires <redacted> --- changes in v2: - split the series by bpf/libbpf/hid/selftests and samples --- samples/bpf/hid_mouse_kern.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/samples/bpf/hid_mouse_kern.c b/samples/bpf/hid_mouse_kern.c
index c24a12e06b40..958820caaf5d 100644
--- a/samples/bpf/hid_mouse_kern.c
+++ b/samples/bpf/hid_mouse_kern.c@@ -62,5 +62,30 @@ int hid_x_event(struct hid_bpf_ctx *ctx) return 0; } +SEC("hid/rdesc_fixup") +int hid_rdesc_fixup(struct hid_bpf_ctx *ctx) +{ + if (ctx->type != HID_BPF_RDESC_FIXUP) + return 0; + + bpf_printk("rdesc: %02x %02x %02x", + ctx->data[0], + ctx->data[1], + ctx->data[2]); + bpf_printk(" %02x %02x %02x", + ctx->data[3], + ctx->data[4], + ctx->data[5]); + bpf_printk(" %02x %02x %02x ...", + ctx->data[6], + ctx->data[7], + ctx->data[8]); + + ctx->data[39] = 0x31; + ctx->data[41] = 0x30; + + return 0; +} + char _license[] SEC("license") = "GPL"; u32 _version SEC("version") = LINUX_VERSION_CODE;
--
2.35.1