discover/pxe: Implement default options

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 24 insertions, 4 deletions

diff --git a/discover/pxe-parser.c b/discover/pxe-parser.c
index ca0f4b5..368d5c7 100644
--- a/discover/pxe-parser.c
+++ b/discover/pxe-parser.c
@@ -10,16 +10,23 @@
 #include "parser-utils.h"
 #include "resource.h"
 
+struct pxe_parser_info {
+	struct discover_boot_option *opt;
+	const char *default_name;
+};
+
 static void pxe_finish(struct conf_context *conf)
 {
-	if (conf->parser_info)
-		discover_context_add_boot_option(conf->dc, conf->parser_info);
+	struct pxe_parser_info *info = conf->parser_info;
+	if (info->opt)
+		discover_context_add_boot_option(conf->dc, info->opt);
 }
 
 static void pxe_process_pair(struct conf_context *ctx,
 		const char *name, char *value)
 {
-	struct discover_boot_option *opt = ctx->parser_info;
+	struct pxe_parser_info *parser_info = ctx->parser_info;
+	struct discover_boot_option *opt = parser_info->opt;
 	struct pb_url *url;
 
 	/* quirk in the syslinux config format: initrd can be separated
@@ -32,16 +39,25 @@ static void pxe_process_pair(struct conf_context *ctx,
 	if (!name)
 		return;
 
+	if (streq(name, "DEFAULT")) {
+		parser_info->default_name = talloc_strdup(parser_info, value);
+		return;
+	}
+
 	if (streq(name, "LABEL")) {
 		if (opt)
 			pxe_finish(ctx);
 
 		opt = discover_boot_option_create(ctx->dc, ctx->dc->device);
-		ctx->parser_info = opt;
 
 		opt->option->name = talloc_strdup(opt, value);
 		opt->option->id = talloc_asprintf(opt, "%s@%p",
 				ctx->dc->device->device->id, opt);
+
+		opt->option->is_default = parser_info->default_name &&
+					streq(parser_info->default_name, value);
+
+		parser_info->opt = opt;
 		return;
 	}
 
@@ -77,6 +93,7 @@ static void pxe_process_pair(struct conf_context *ctx,
 
 static int pxe_parse(struct discover_context *dc, char *buf, int len)
 {
+	struct pxe_parser_info *parser_info;
 	struct conf_context *conf;
 
 	conf = talloc_zero(dc, struct conf_context);
@@ -89,6 +106,9 @@ static int pxe_parse(struct discover_context *dc, char *buf, int len)
 	conf->process_pair = pxe_process_pair;
 	conf->finish = pxe_finish;
 
+	parser_info = talloc_zero(conf, struct pxe_parser_info);
+	conf->parser_info = parser_info;
+
 	conf_parse_buf(conf, buf, len);
 
 	talloc_free(conf);