From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
To: Greg KH <gregkh@linuxfoundation.org>,
Jiri Kosina <jikos@kernel.org>, Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <shuah@kernel.org>
Cc: Tero Kristo <tero.kristo@linux.intel.com>,
linux-kernel@vger.kernel.org, linux-input@vger.kernel.org,
bpf@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-doc@vger.kernel.org,
Benjamin Tissoires <benjamin.tissoires@redhat.com>
Subject: [PATCH hid v11 06/14] selftests/hid: add test to change the report size
Date: Tue, 25 Oct 2022 11:34:50 +0200 [thread overview]
Message-ID: <20221025093458.457089-7-benjamin.tissoires@redhat.com> (raw)
In-Reply-To: <20221025093458.457089-1-benjamin.tissoires@redhat.com>
Use a different report with a bigger size and ensures we are doing
things properly.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
---
changes in v11:
- use the new facility from selftests/hid
no changes in v10
no changes in v9
no changes in v8
no changes in v7
no changes in v6
new in v5
---
tools/testing/selftests/hid/hid_bpf.c | 41 +++++++++++++++++++++++++
tools/testing/selftests/hid/progs/hid.c | 15 ++++++++-
2 files changed, 55 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/hid/hid_bpf.c b/tools/testing/selftests/hid/hid_bpf.c
index 3012fb95e6fc..a6daaadccfb5 100644
--- a/tools/testing/selftests/hid/hid_bpf.c
+++ b/tools/testing/selftests/hid/hid_bpf.c
@@ -23,6 +23,17 @@ static unsigned char rdesc[] = {
0xa1, 0x01, /* COLLECTION (Application) */
0x09, 0x01, /* Usage (Vendor Usage 0x01) */
0xa1, 0x00, /* COLLECTION (Physical) */
+ 0x85, 0x02, /* REPORT_ID (2) */
+ 0x19, 0x01, /* USAGE_MINIMUM (1) */
+ 0x29, 0x08, /* USAGE_MAXIMUM (3) */
+ 0x15, 0x00, /* LOGICAL_MINIMUM (0) */
+ 0x25, 0xff, /* LOGICAL_MAXIMUM (255) */
+ 0x95, 0x08, /* REPORT_COUNT (8) */
+ 0x75, 0x08, /* REPORT_SIZE (8) */
+ 0x81, 0x02, /* INPUT (Data,Var,Abs) */
+ 0xc0, /* END_COLLECTION */
+ 0x09, 0x01, /* Usage (Vendor Usage 0x01) */
+ 0xa1, 0x00, /* COLLECTION (Physical) */
0x85, 0x01, /* REPORT_ID (1) */
0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */
0x19, 0x01, /* USAGE_MINIMUM (1) */
@@ -646,6 +657,36 @@ TEST_F(hid_bpf, test_attach_detach)
ASSERT_EQ(buf[2], 47);
}
+/*
+ * Attach hid_change_report_id to the given uhid device,
+ * retrieve and open the matching hidraw node,
+ * inject one event in the uhid device,
+ * check that the program sees it and can change the data
+ */
+TEST_F(hid_bpf, test_hid_change_report)
+{
+ const struct test_program progs[] = {
+ { .name = "hid_change_report_id" },
+ };
+ u8 buf[10] = {0};
+ int err;
+
+ LOAD_PROGRAMS(progs);
+
+ /* inject one event */
+ buf[0] = 1;
+ buf[1] = 42;
+ uhid_send_event(_metadata, self->uhid_fd, buf, 6);
+
+ /* read the data from hidraw */
+ memset(buf, 0, sizeof(buf));
+ err = read(self->hidraw_fd, buf, sizeof(buf));
+ ASSERT_EQ(err, 9) TH_LOG("read_hidraw");
+ ASSERT_EQ(buf[0], 2);
+ ASSERT_EQ(buf[1], 42);
+ ASSERT_EQ(buf[2], 0) TH_LOG("leftovers_from_previous_test");
+}
+
static int libbpf_print_fn(enum libbpf_print_level level,
const char *format, va_list args)
{
diff --git a/tools/testing/selftests/hid/progs/hid.c b/tools/testing/selftests/hid/progs/hid.c
index fc0a4241643a..ee7529c47ad8 100644
--- a/tools/testing/selftests/hid/progs/hid.c
+++ b/tools/testing/selftests/hid/progs/hid.c
@@ -32,7 +32,20 @@ int BPF_PROG(hid_first_event, struct hid_bpf_ctx *hid_ctx)
rw_data[2] = rw_data[1] + 5;
- return 0;
+ return hid_ctx->size;
+}
+
+SEC("?fmod_ret/hid_bpf_device_event")
+int BPF_PROG(hid_change_report_id, struct hid_bpf_ctx *hid_ctx)
+{
+ __u8 *rw_data = hid_bpf_get_data(hid_ctx, 0 /* offset */, 3 /* size */);
+
+ if (!rw_data)
+ return 0; /* EPERM check */
+
+ rw_data[0] = 2;
+
+ return 9;
}
SEC("syscall")
--
2.36.1
next prev parent reply other threads:[~2022-10-25 9:36 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-25 9:34 [PATCH hid v11 00/14] Introduce eBPF support for HID devices Benjamin Tissoires
2022-10-25 9:34 ` [PATCH hid v11 01/14] HID: Kconfig: split HID support and hid-core compilation Benjamin Tissoires
2022-10-29 13:55 ` kernel test robot
2022-10-29 17:57 ` kernel test robot
2022-10-25 9:34 ` [PATCH hid v11 02/14] HID: initial BPF implementation Benjamin Tissoires
2022-10-25 22:52 ` Alexei Starovoitov
2022-10-27 9:11 ` Benjamin Tissoires
2022-10-25 9:34 ` [PATCH hid v11 03/14] selftests: add tests for the HID-bpf initial implementation Benjamin Tissoires
2022-10-25 9:34 ` [PATCH hid v11 04/14] HID: bpf jmp table: simplify the logic of cleaning up programs Benjamin Tissoires
2022-10-28 3:13 ` kernel test robot
2022-10-25 9:34 ` [PATCH hid v11 05/14] HID: bpf: allocate data memory for device_event BPF programs Benjamin Tissoires
2022-10-29 13:45 ` kernel test robot
2022-10-25 9:34 ` Benjamin Tissoires [this message]
2022-10-25 9:34 ` [PATCH hid v11 07/14] HID: bpf: introduce hid_hw_request() Benjamin Tissoires
2022-11-02 12:11 ` Dan Carpenter
2022-10-25 9:34 ` [PATCH hid v11 08/14] selftests/hid: add tests for bpf_hid_hw_request Benjamin Tissoires
2022-10-25 9:34 ` [PATCH hid v11 09/14] HID: bpf: allow to change the report descriptor Benjamin Tissoires
2022-10-31 15:22 ` kernel test robot
2022-10-25 9:34 ` [PATCH hid v11 10/14] selftests/hid: add report descriptor fixup tests Benjamin Tissoires
2022-10-25 9:34 ` [PATCH hid v11 11/14] selftests/hid: Add a test for BPF_F_INSERT_HEAD Benjamin Tissoires
2022-10-25 9:34 ` [PATCH hid v11 12/14] samples/hid: add new hid BPF example Benjamin Tissoires
2022-10-25 9:34 ` [PATCH hid v11 13/14] samples/hid: add Surface Dial example Benjamin Tissoires
2022-10-25 9:34 ` [PATCH hid v11 14/14] Documentation: add HID-BPF docs Benjamin Tissoires
2022-10-26 13:21 ` Bagas Sanjaya
2022-10-26 13:44 ` Jonathan Corbet
2022-11-04 11:41 ` [PATCH hid v11 00/14] Introduce eBPF support for HID devices Tero Kristo
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