tools: ynl: convert enum selector to string for sub-message parsing

YNL sub-message parsing expects a string selector for strcmp(). So for
non-external enum selectors, convert the integer value to its string form
via the family's {enum}_str() helper. This enables correct decoding of
sub-messages keyed by enum values.

After the change, if there is no encap_type (e.g. previous ordering on
older kernels), or a new encap_type is missing from the spec file in
future kernel, the code will report "Sub-message key not set", the same
with string lookup fails. With the subsequent rt-route encap spec update,
the newly generated code will look like:

	if (!dst->_present.encap_type)
		return ynl_submsg_failed(yarg, "encap", "encap-type");
	encap_type_str = rt_route_encap_type_str(dst->encap_type);
	if (!encap_type_str)
		return ynl_submsg_failed(yarg, "encap", "enum-lookup-failed");
	if (rt_route_encap_data_parse(&parg, encap_type_str, attr))
		return YNL_PARSE_CB_ERROR;

Signed-off-by: Hangbin Liu <liuhangbin@kylinos.cn>
Link: https://patch.msgid.link/20261008-ynl_rt_encap-v4-2-4ed2ccf7f949@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions