From patchwork Fri Mar 15 14:44:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Tissoires X-Patchwork-Id: 780785 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 46DDF46544; Fri, 15 Mar 2024 14:45:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710513903; cv=none; b=dTSZpX0mvoUord0wmCYmVRJSzFgc2FGd1b+zGdSsUJ9k0iNfapA1KJz+5g3PvD3Ye6lx9bks2VAqDEF1H71uzfirgL24+XSeWL5EMkDdKSqzP56PkqbAyAbQKX0ySbDAhrkNGlz7erZ/aUTR2vDuB9ZaTtnXwINRduM/bOHLWAM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710513903; c=relaxed/simple; bh=lYHlpbXv8wmdpHJLSDMirre3aCp7tdPr2ucjfV4U1U8=; 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a=ed25519-sha256; t=1710513885; l=4246; i=bentiss@kernel.org; s=20230215; h=from:subject:message-id; bh=lYHlpbXv8wmdpHJLSDMirre3aCp7tdPr2ucjfV4U1U8=; b=IIe/kVEZQ/jDRK2mnYLrzNf7zUvgbeEt3ejpPJX82UWsH0HVPIsWT8VFNroSxg7DNnzBPLM7f +FeZxznY/E1C+j3MsVXYOul9vrKfmH5SKdVsrwesBLPOJ9SfWllyd1h X-Developer-Key: i=bentiss@kernel.org; a=ed25519; pk=7D1DyAVh6ajCkuUTudt/chMuXWIJHlv2qCsRkIizvFw= Usual way of testing, we call the function and ensures we receive the event Signed-off-by: Benjamin Tissoires --- no changes in v4 no changes in v3 no changes in v2 --- tools/testing/selftests/hid/hid_bpf.c | 49 +++++++++++++++++++++- tools/testing/selftests/hid/progs/hid.c | 22 ++++++++++ .../testing/selftests/hid/progs/hid_bpf_helpers.h | 4 ++ 3 files changed, 73 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/hid/hid_bpf.c b/tools/testing/selftests/hid/hid_bpf.c index 8332014838b0..f825623e3edc 100644 --- a/tools/testing/selftests/hid/hid_bpf.c +++ b/tools/testing/selftests/hid/hid_bpf.c @@ -749,6 +749,52 @@ TEST_F(hid_bpf, test_hid_change_report) ASSERT_EQ(buf[2], 0) TH_LOG("leftovers_from_previous_test"); } +/* + * Call hid_bpf_input_report against the given uhid device, + * check that the program is called and does the expected. + */ +TEST_F(hid_bpf, test_hid_user_input_report_call) +{ + struct hid_hw_request_syscall_args args = { + .retval = -1, + .size = 10, + }; + DECLARE_LIBBPF_OPTS(bpf_test_run_opts, tattrs, + .ctx_in = &args, + .ctx_size_in = sizeof(args), + ); + __u8 buf[10] = {0}; + int err, prog_fd; + + LOAD_BPF; + + args.hid = self->hid_id; + args.data[0] = 1; /* report ID */ + args.data[1] = 2; /* report ID */ + args.data[2] = 42; /* report ID */ + + prog_fd = bpf_program__fd(self->skel->progs.hid_user_input_report); + + /* check that there is no data to read from hidraw */ + memset(buf, 0, sizeof(buf)); + err = read(self->hidraw_fd, buf, sizeof(buf)); + ASSERT_EQ(err, -1) TH_LOG("read_hidraw"); + + err = bpf_prog_test_run_opts(prog_fd, &tattrs); + + ASSERT_OK(err) TH_LOG("error while calling bpf_prog_test_run_opts"); + + ASSERT_EQ(args.retval, 0); + + /* read the data from hidraw */ + memset(buf, 0, sizeof(buf)); + err = read(self->hidraw_fd, buf, sizeof(buf)); + ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); + ASSERT_EQ(buf[0], 1); + ASSERT_EQ(buf[1], 2); + ASSERT_EQ(buf[2], 42); +} + /* * Call hid_bpf_hw_output_report against the given uhid device, * check that the program is called and does the expected. @@ -797,8 +843,7 @@ TEST_F(hid_bpf, test_hid_user_output_report_call) } /* - * Attach hid_user_raw_request to the given uhid device, - * call the bpf program from userspace + * Call hid_hw_raw_request against the given uhid device, * check that the program is called and does the expected. */ TEST_F(hid_bpf, test_hid_user_raw_request_call) diff --git a/tools/testing/selftests/hid/progs/hid.c b/tools/testing/selftests/hid/progs/hid.c index 2c2b679a83b1..f67d35def142 100644 --- a/tools/testing/selftests/hid/progs/hid.c +++ b/tools/testing/selftests/hid/progs/hid.c @@ -125,6 +125,28 @@ int hid_user_output_report(struct hid_hw_request_syscall_args *args) return 0; } +SEC("syscall") +int hid_user_input_report(struct hid_hw_request_syscall_args *args) +{ + struct hid_bpf_ctx *ctx; + const size_t size = args->size; + int i, ret = 0; + + if (size > sizeof(args->data)) + return -7; /* -E2BIG */ + + ctx = hid_bpf_allocate_context(args->hid); + if (!ctx) + return -1; /* EPERM check */ + + ret = hid_bpf_input_report(ctx, HID_INPUT_REPORT, args->data, size); + args->retval = ret; + + hid_bpf_release_context(ctx); + + return 0; +} + static const __u8 rdesc[] = { 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 0x09, 0x32, /* USAGE (Z) */ diff --git a/tools/testing/selftests/hid/progs/hid_bpf_helpers.h b/tools/testing/selftests/hid/progs/hid_bpf_helpers.h index 50c6a0d5765e..9cd56821d0f1 100644 --- a/tools/testing/selftests/hid/progs/hid_bpf_helpers.h +++ b/tools/testing/selftests/hid/progs/hid_bpf_helpers.h @@ -96,5 +96,9 @@ extern int hid_bpf_hw_request(struct hid_bpf_ctx *ctx, enum hid_class_request reqtype) __ksym; extern int hid_bpf_hw_output_report(struct hid_bpf_ctx *ctx, __u8 *buf, size_t buf__sz) __ksym; +extern int hid_bpf_input_report(struct hid_bpf_ctx *ctx, + enum hid_report_type type, + __u8 *data, + size_t buf__sz) __ksym; #endif /* __HID_BPF_HELPERS_H */