Use a different report with a bigger size and ensures we are doing things properly.
Signed-off-by: Benjamin Tissoires benjamin.tissoires@redhat.com
---
no changes in v9
no changes in v8
no changes in v7
no changes in v6
new in v5 --- tools/testing/selftests/bpf/prog_tests/hid.c | 60 ++++++++++++++++++++ tools/testing/selftests/bpf/progs/hid.c | 15 ++++- 2 files changed, 74 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/hid.c b/tools/testing/selftests/bpf/prog_tests/hid.c index 719d220c8d86..47bc0a30c275 100644 --- a/tools/testing/selftests/bpf/prog_tests/hid.c +++ b/tools/testing/selftests/bpf/prog_tests/hid.c @@ -17,6 +17,17 @@ 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) */ @@ -635,6 +646,53 @@ static int test_attach_detach(int uhid_fd, int dev_id) return ret; }
+/* + * 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 + */ +static int test_hid_change_report(int uhid_fd, int dev_id) +{ + struct test_params params; + int err, hidraw_fd = -1; + u8 buf[10] = {0}; + int ret = -1; + + err = prep_test(dev_id, "hid_change_report_id", ¶ms); + if (!ASSERT_EQ(err, 0, "prep_test(hid_change_report_id)")) + goto cleanup; + + hidraw_fd = params.hidraw_fd; + + /* inject one event */ + buf[0] = 1; + buf[1] = 42; + send_event(uhid_fd, buf, 6); + + /* read the data from hidraw */ + memset(buf, 0, sizeof(buf)); + err = read(hidraw_fd, buf, sizeof(buf)); + if (!ASSERT_EQ(err, 9, "read_hidraw")) + goto cleanup; + + if (!ASSERT_EQ(buf[0], 2, "hid_change_report_id")) + goto cleanup; + + if (!ASSERT_EQ(buf[1], 42, "hid_change_report_id")) + goto cleanup; + + if (!ASSERT_EQ(buf[2], 0, "leftovers_from_previous_test")) + goto cleanup; + + ret = 0; + +cleanup: + cleanup_test(¶ms); + + return ret; +} + void serial_test_hid_bpf(void) { int err, uhid_fd; @@ -660,6 +718,8 @@ void serial_test_hid_bpf(void) ASSERT_OK(err, "hid"); err = test_attach_detach(uhid_fd, dev_id); ASSERT_OK(err, "hid_attach_detach"); + err = test_hid_change_report(uhid_fd, dev_id); + ASSERT_OK(err, "hid_change_report");
destroy(uhid_fd);
diff --git a/tools/testing/selftests/bpf/progs/hid.c b/tools/testing/selftests/bpf/progs/hid.c index fc0a4241643a..ee7529c47ad8 100644 --- a/tools/testing/selftests/bpf/progs/hid.c +++ b/tools/testing/selftests/bpf/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")