discover: Add struct resource

Introduce a new type, struct resource, for handling resources such as
kernels and initrds.

This allows the parsers to better describe resources that are required
for booting. Firstly, we enforce all resources to be URLs, rather than
local paths. Also, resources allow us to describe files devices that
have not-yet been hotplugged.

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

1 files changed, 23 insertions, 0 deletions

diff --git a/discover/resource.h b/discover/resource.h
new file mode 100644
index 0000000..b7e1a46
--- /dev/null
+++ b/discover/resource.h
@@ -0,0 +1,23 @@
+#ifndef RESOURCE_H
+#define RESOURCE_H
+
+#include <stdbool.h>
+
+struct pb_url;
+
+/**
+ * Data for local/remote resources. Resources may be "unresolved", in that
+ * they refer to a device that is not yet present. Unresolved resources
+ * simply contain parser-specific data (generally a device string parsed from
+ * the config file), and may be resolved by the parser once new devices appear.
+ */
+struct resource {
+	bool resolved;
+	union {
+		struct pb_url	*url;
+		void		*info;
+	};
+};
+
+#endif /* RESOURCE_H */
+