Wed, Oct 09, 2019 at 10:59:43PM CEST, mkubecek@suse.cz wrote:

[...]

+static const struct nla_policy linkinfo_hdr_policy[ETHTOOL_A_HEADER_MAX + 1] = {
+	[ETHTOOL_A_HEADER_UNSPEC]		= { .type = NLA_REJECT },
+	[ETHTOOL_A_HEADER_DEV_INDEX]		= { .type = NLA_U32 },
+	[ETHTOOL_A_HEADER_DEV_NAME]		= { .type = NLA_NUL_STRING,
+						    .len = IFNAMSIZ - 1 },

Please make ETHTOOL_A_HEADER_DEV_NAME accept alternative names as well.
Just s/IFNAMSIZ/ALTIFNAMSIZ should be enough.

+	[ETHTOOL_A_HEADER_GFLAGS]		= { .type = NLA_U32 },
+	[ETHTOOL_A_HEADER_RFLAGS]		= { .type = NLA_REJECT },
+};

[...]