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author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2022-11-03 16:57:48 +0100 |
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committer | Jiri Kosina <jkosina@suse.cz> | 2022-11-15 16:28:30 +0100 |
commit | 0330f725cc5b01f4149a2a21e474b2090a1dcead (patch) | |
tree | 5cf47f61f10151f34a5e2dd0486bec263cbc7000 /tools/testing/selftests/hid | |
parent | 658ee5a64fcfbbf758447fa3af425729eaabb0dc (diff) | |
download | linux-stable-0330f725cc5b01f4149a2a21e474b2090a1dcead.tar.gz linux-stable-0330f725cc5b01f4149a2a21e474b2090a1dcead.tar.bz2 linux-stable-0330f725cc5b01f4149a2a21e474b2090a1dcead.zip |
selftests/hid: add test to change the report size
Use a different report with a bigger size and ensures we are doing
things properly.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'tools/testing/selftests/hid')
-rw-r--r-- | tools/testing/selftests/hid/hid_bpf.c | 41 | ||||
-rw-r--r-- | tools/testing/selftests/hid/progs/hid.c | 15 |
2 files changed, 55 insertions, 1 deletions
diff --git a/tools/testing/selftests/hid/hid_bpf.c b/tools/testing/selftests/hid/hid_bpf.c index 4fc7794c6f8b..6c1f43ec4bdd 100644 --- a/tools/testing/selftests/hid/hid_bpf.c +++ b/tools/testing/selftests/hid/hid_bpf.c @@ -22,6 +22,17 @@ 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) */ @@ -645,6 +656,36 @@ 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 b23ae2304346..b69c3f8e1ac3 100644 --- a/tools/testing/selftests/hid/progs/hid.c +++ b/tools/testing/selftests/hid/progs/hid.c @@ -28,7 +28,20 @@ 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") |