[smbios] Expose board serial number as ${board-serial}

With blade servers, the chassis serial number (exposed via ${serial})
may not be unique.  Expose ${board-serial} as a named setting to
provide easy access to a more meaningful serial number.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/interface/smbios/smbios_settings.c b/src/interface/smbios/smbios_settings.c
index 5dcf0020..83e4320e 100644
--- a/src/interface/smbios/smbios_settings.c
+++ b/src/interface/smbios/smbios_settings.c
@@ -241,3 +241,15 @@ const struct setting asset_setting __setting ( SETTING_HOST_EXTRA, asset ) = {
 	.type = &setting_type_string,
 	.scope = &smbios_settings_scope,
 };
+
+/** Board serial number setting (may differ from chassis serial number) */
+const struct setting board_serial_setting __setting ( SETTING_HOST_EXTRA,
+						      board_serial ) = {
+	.name = "board-serial",
+	.description = "Base board serial",
+	.tag = SMBIOS_STRING_TAG ( SMBIOS_TYPE_BASE_BOARD_INFORMATION,
+				   struct smbios_base_board_information,
+				   serial ),
+	.type = &setting_type_string,
+	.scope = &smbios_settings_scope,
+};