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author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2022-11-03 16:57:50 +0100 |
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committer | Jiri Kosina <jkosina@suse.cz> | 2022-11-15 16:28:31 +0100 |
commit | 4f7153cf461ed0f78d8da8c9fd02d38728a76b90 (patch) | |
tree | d6a105c244a7f429a8eafbdafd831824b0604394 /tools/testing/selftests/hid | |
parent | 91a7f802d1852f60139712bdcfa98db547ce0531 (diff) | |
download | linux-stable-4f7153cf461ed0f78d8da8c9fd02d38728a76b90.tar.gz linux-stable-4f7153cf461ed0f78d8da8c9fd02d38728a76b90.tar.bz2 linux-stable-4f7153cf461ed0f78d8da8c9fd02d38728a76b90.zip |
selftests/hid: add tests for bpf_hid_hw_request
Add tests for the newly implemented function.
We test here only the GET_REPORT part because the other calls are pure
HID protocol and won't infer the result of the test of the bpf hook.
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 | 56 | ||||
-rw-r--r-- | tools/testing/selftests/hid/progs/hid.c | 36 | ||||
-rw-r--r-- | tools/testing/selftests/hid/progs/hid_bpf_helpers.h | 7 |
3 files changed, 98 insertions, 1 deletions
diff --git a/tools/testing/selftests/hid/hid_bpf.c b/tools/testing/selftests/hid/hid_bpf.c index 6c1f43ec4bdd..f77ee7fe4af4 100644 --- a/tools/testing/selftests/hid/hid_bpf.c +++ b/tools/testing/selftests/hid/hid_bpf.c @@ -82,12 +82,23 @@ static unsigned char rdesc[] = { 0xc0, /* END_COLLECTION */ }; +static __u8 feature_data[] = { 1, 2 }; + struct attach_prog_args { int prog_fd; unsigned int hid; int retval; }; +struct hid_hw_request_syscall_args { + __u8 data[10]; + unsigned int hid; + int retval; + size_t size; + enum hid_report_type type; + __u8 request_type; +}; + #define ASSERT_OK(data) ASSERT_FALSE(data) #define ASSERT_OK_PTR(ptr) ASSERT_NE(NULL, ptr) @@ -155,7 +166,7 @@ static void uhid_destroy(struct __test_metadata *_metadata, int fd) static int uhid_event(struct __test_metadata *_metadata, int fd) { - struct uhid_event ev; + struct uhid_event ev, answer; ssize_t ret; memset(&ev, 0, sizeof(ev)); @@ -196,6 +207,15 @@ static int uhid_event(struct __test_metadata *_metadata, int fd) break; case UHID_GET_REPORT: UHID_LOG("UHID_GET_REPORT from uhid-dev"); + + answer.type = UHID_GET_REPORT_REPLY; + answer.u.get_report_reply.id = ev.u.get_report.id; + answer.u.get_report_reply.err = ev.u.get_report.rnum == 1 ? 0 : -EIO; + answer.u.get_report_reply.size = sizeof(feature_data); + memcpy(answer.u.get_report_reply.data, feature_data, sizeof(feature_data)); + + uhid_write(_metadata, fd, &answer); + break; case UHID_SET_REPORT: UHID_LOG("UHID_SET_REPORT from uhid-dev"); @@ -686,6 +706,40 @@ TEST_F(hid_bpf, test_hid_change_report) ASSERT_EQ(buf[2], 0) TH_LOG("leftovers_from_previous_test"); } +/* + * Attach hid_user_raw_request to the given uhid device, + * call the bpf program from userspace + * check that the program is called and does the expected. + */ +TEST_F(hid_bpf, test_hid_user_raw_request_call) +{ + struct hid_hw_request_syscall_args args = { + .retval = -1, + .type = HID_FEATURE_REPORT, + .request_type = HID_REQ_GET_REPORT, + .size = 10, + }; + DECLARE_LIBBPF_OPTS(bpf_test_run_opts, tattrs, + .ctx_in = &args, + .ctx_size_in = sizeof(args), + ); + int err, prog_fd; + + LOAD_BPF; + + args.hid = self->hid_id; + args.data[0] = 1; /* report ID */ + + prog_fd = bpf_program__fd(self->skel->progs.hid_user_raw_request); + + 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, 2); + + ASSERT_EQ(args.data[1], 2); +} + 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 b69c3f8e1ac3..7e35bb8e1abf 100644 --- a/tools/testing/selftests/hid/progs/hid.c +++ b/tools/testing/selftests/hid/progs/hid.c @@ -52,3 +52,39 @@ int attach_prog(struct attach_prog_args *ctx) 0); return 0; } + +struct hid_hw_request_syscall_args { + /* data needs to come at offset 0 so we can use it in calls */ + __u8 data[10]; + unsigned int hid; + int retval; + size_t size; + enum hid_report_type type; + __u8 request_type; +}; + +SEC("syscall") +int hid_user_raw_request(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_hw_request(ctx, + args->data, + size, + args->type, + args->request_type); + args->retval = ret; + + hid_bpf_release_context(ctx); + + return 0; +} diff --git a/tools/testing/selftests/hid/progs/hid_bpf_helpers.h b/tools/testing/selftests/hid/progs/hid_bpf_helpers.h index b9fa33f7d580..4fff31dbe0e7 100644 --- a/tools/testing/selftests/hid/progs/hid_bpf_helpers.h +++ b/tools/testing/selftests/hid/progs/hid_bpf_helpers.h @@ -10,5 +10,12 @@ extern __u8 *hid_bpf_get_data(struct hid_bpf_ctx *ctx, unsigned int offset, const size_t __sz) __ksym; extern int hid_bpf_attach_prog(unsigned int hid_id, int prog_fd, u32 flags) __ksym; +extern struct hid_bpf_ctx *hid_bpf_allocate_context(unsigned int hid_id) __ksym; +extern void hid_bpf_release_context(struct hid_bpf_ctx *ctx) __ksym; +extern int hid_bpf_hw_request(struct hid_bpf_ctx *ctx, + __u8 *data, + size_t buf__sz, + enum hid_report_type type, + enum hid_class_request reqtype) __ksym; #endif /* __HID_BPF_HELPERS_H */ |