[PATCH i-g-t v3 16/41] lib/vkms: Test connector invalid values
Louis Chauvet
louis.chauvet at bootlin.com
Wed Jul 16 09:41:56 UTC 2025
Le 15/07/2025 à 12:24, José Expósito a écrit :
> For a VKMS connector, it is only possible to set invalid values in the
> connector status.
>
> Test that setting wrong values fails and that the connector is not
> accidentally changed.
>
> Signed-off-by: José Expósito <jose.exposito89 at gmail.com>
> ---
> lib/igt_vkms.c | 24 ++++++++++++++++++
> lib/igt_vkms.h | 2 ++
> tests/vkms/vkms_configfs.c | 50 ++++++++++++++++++++++++++++++++++++++
> 3 files changed, 76 insertions(+)
>
> diff --git a/lib/igt_vkms.c b/lib/igt_vkms.c
> index c8b0dd071..1cd560038 100644
> --- a/lib/igt_vkms.c
> +++ b/lib/igt_vkms.c
> @@ -614,3 +614,27 @@ int igt_vkms_connector_get_status(igt_vkms_t *dev, const char *name)
>
> return read_int(path);
> }
> +
> +/**
> + * igt_vkms_connector_set_status:
> + * @dev: Device the connector belongs to
> + * @name: Connector name
> + * @type: DRM_MODE_CONNECTED, DRM_MODE_DISCONNECTED or
> + * DRM_MODE_UNKNOWNCONNECTION
> + *
> + * Set a new status for the connector
> + */
> +void igt_vkms_connector_set_status(igt_vkms_t *dev, const char *name,
> + int status)
> +{
> + char path[PATH_MAX];
> +
> + if (status != DRM_MODE_CONNECTED &&
> + status != DRM_MODE_DISCONNECTED &&
> + status != DRM_MODE_UNKNOWNCONNECTION)
> + igt_assert(!"Cannot be reached: Unknown connector status");
Do we really need this? It is already checked by vkms.
> + igt_vkms_get_connector_status_path(dev, name, path, sizeof(path));
> +
> + write_int(path, status);
> +}
> diff --git a/lib/igt_vkms.h b/lib/igt_vkms.h
> index 3d27bfebb..df64bde9d 100644
> --- a/lib/igt_vkms.h
> +++ b/lib/igt_vkms.h
> @@ -58,5 +58,7 @@ void igt_vkms_device_add_encoder(igt_vkms_t *dev, const char *name);
>
> void igt_vkms_device_add_connector(igt_vkms_t *dev, const char *name);
> int igt_vkms_connector_get_status(igt_vkms_t *dev, const char *name);
> +void igt_vkms_connector_set_status(igt_vkms_t *dev, const char *name,
> + int status);
>
> #endif /* __IGT_VKMS_H__ */
> diff --git a/tests/vkms/vkms_configfs.c b/tests/vkms/vkms_configfs.c
> index d7ce4aa17..c74bbc15f 100644
> --- a/tests/vkms/vkms_configfs.c
> +++ b/tests/vkms/vkms_configfs.c
> @@ -486,6 +486,55 @@ static void test_connector_default_values(void)
> igt_vkms_device_destroy(dev);
> }
>
> +/**
> + * SUBTEST: connector-wrong-values
> + * Description: Check that setting unexpected values doesn't work.
> + */
> +
> +static void test_connector_wrong_values(void)
> +{
> + struct invalid_value invalid_status_values[] = {
> + { "", 0 },
> + { "\0", 1 },
> + { "-1", 2 },
> + { "0", 1 },
> + { "4", 1 },
> + { "connected", 10 },
> + };
> + igt_vkms_t *dev;
> + char path[PATH_MAX];
> + int fd;
> + int ret;
> +
> + /* Create a device with a disconnected connector */
> + dev = igt_vkms_device_create(__func__);
> + igt_assert(dev);
> +
> + igt_vkms_device_add_connector(dev, "connector0");
> + igt_vkms_connector_set_status(dev, "connector0", DRM_MODE_DISCONNECTED);
> + igt_assert_eq(igt_vkms_connector_get_status(dev, "connector0"),
> + DRM_MODE_DISCONNECTED);
> + igt_vkms_get_connector_status_path(dev, "connector0", path, sizeof(path));
> +
> + /* Test invalid values for "status" */
> + for (int i = 0; i < ARRAY_SIZE(invalid_status_values); i++) {
> + struct invalid_value v = invalid_status_values[i];
> +
> + fd = open(path, O_WRONLY);
> + igt_assert_f(fd >= 0, "Error opening '%s'\n", path);
> +
> + ret = write(fd, v.value, v.size);
> + igt_assert(ret <= 0);
> +
> + close(fd);
> + }
> +
> + igt_assert_eq(igt_vkms_connector_get_status(dev, "connector0"),
> + DRM_MODE_DISCONNECTED);
> +
> + igt_vkms_device_destroy(dev);
> +}
> +
> igt_main
> {
> struct {
> @@ -506,6 +555,7 @@ igt_main
> { "encoder-default-files", test_encoder_default_files },
> { "connector-default-files", test_connector_default_files },
> { "connector-default-values", test_connector_default_values },
> + { "connector-wrong-values", test_connector_wrong_values },
> };
>
> igt_fixture {
--
Louis Chauvet, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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