X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fdevice-handler.c;h=a8df295df1b6e4763516b68de240c6fa907240a7;hp=c661fbe2eb3c5aa9189cb720e5c12e064a296360;hb=5444648fe1ff9b79f3db5ee6feadd51341f59d71;hpb=75b1278f2ab0dad22f393e4a002f797dcb8c8a3b

diff --git a/discover/device-handler.c b/discover/device-handler.c
index c661fbe..a8df295 100644
--- a/discover/device-handler.c
+++ b/discover/device-handler.c
@@ -12,11 +12,13 @@
 #include <log/log.h>
 #include <types/types.h>
 #include <system/system.h>
+#include <url/url.h>
 
 #include "device-handler.h"
 #include "discover-server.h"
 #include "event.h"
 #include "parser.h"
+#include "resource.h"
 #include "udev.h"
 #include "paths.h"
 #include "boot.h"
@@ -27,8 +29,80 @@ struct device_handler {
 
 	struct discover_device	**devices;
 	unsigned int		n_devices;
+
+	struct list		unresolved_boot_options;
 };
 
+static bool resource_is_resolved(struct resource *res)
+{
+	return !res || res->resolved;
+}
+
+/* We only use this in an assert, which will disappear if we're compiling
+ * with NDEBUG, so we need the 'used' attribute for these builds */
+static bool __attribute__((used)) boot_option_is_resolved(
+		struct discover_boot_option *opt)
+{
+	return resource_is_resolved(opt->boot_image) &&
+		resource_is_resolved(opt->initrd) &&
+		resource_is_resolved(opt->icon);
+}
+
+static bool resource_resolve(struct resource *res, struct parser *parser,
+		struct device_handler *handler)
+{
+	if (resource_is_resolved(res))
+		return true;
+
+	parser->resolve_resource(handler, res);
+
+	return res->resolved;
+}
+
+static bool boot_option_resolve(struct discover_boot_option *opt,
+		struct device_handler *handler)
+{
+	return resource_resolve(opt->boot_image, opt->source, handler) &&
+		resource_resolve(opt->initrd, opt->source, handler) &&
+		resource_resolve(opt->icon, opt->source, handler);
+}
+
+static void boot_option_finalise(struct discover_boot_option *opt)
+{
+	assert(boot_option_is_resolved(opt));
+
+	/* check that the parsers haven't set any of the final data */
+	assert(!opt->option->boot_image_file);
+	assert(!opt->option->initrd_file);
+	assert(!opt->option->icon_file);
+
+	if (opt->boot_image)
+		opt->option->boot_image_file = opt->boot_image->url->full;
+	if (opt->initrd)
+		opt->option->initrd_file = opt->initrd->url->full;
+	if (opt->icon)
+		opt->option->icon_file = opt->icon->url->full;
+}
+
+static void process_boot_option_queue(struct device_handler *handler)
+{
+	struct discover_boot_option *opt, *tmp;
+
+	list_for_each_entry_safe(&handler->unresolved_boot_options,
+			opt, tmp, list) {
+
+		if (!boot_option_resolve(opt, handler))
+			continue;
+
+		list_remove(&opt->list);
+		list_add(&opt->device->boot_options, &opt->list);
+		talloc_steal(opt->device, opt);
+		boot_option_finalise(opt);
+		discover_server_notify_boot_option_add(handler->server,
+							opt->option);
+	}
+}
+
 /**
  * context_commit - Commit a temporary discovery context to the handler,
  * and notify the clients about any new options / devices
@@ -57,22 +131,34 @@ static void context_commit(struct device_handler *handler,
 		talloc_steal(handler, dev);
 
 		discover_server_notify_device_add(handler->server, dev->device);
+
+		/* this new device might be able to resolve existing boot
+		 * options */
+		process_boot_option_queue(handler);
 	}
 
 
 	/* move boot options from the context to the device */
 	list_for_each_entry_safe(&ctx->boot_options, opt, tmp, list) {
 		list_remove(&opt->list);
-		list_add(&dev->boot_options, &opt->list);
-		talloc_steal(dev, opt);
-		discover_server_notify_boot_option_add(handler->server,
-							opt->option);
+
+		if (boot_option_resolve(opt, handler)) {
+			list_add(&dev->boot_options, &opt->list);
+			talloc_steal(dev, opt);
+			boot_option_finalise(opt);
+			discover_server_notify_boot_option_add(handler->server,
+								opt->option);
+		} else {
+			list_add(&handler->unresolved_boot_options, &opt->list);
+			talloc_steal(handler, opt);
+		}
 	}
 }
 
 void discover_context_add_boot_option(struct discover_context *ctx,
 		struct discover_boot_option *boot_option)
 {
+	boot_option->source = ctx->parser;
 	list_add(&ctx->boot_options, &boot_option->list);
 	talloc_steal(ctx, boot_option);
 }
@@ -402,6 +488,7 @@ struct device_handler *device_handler_init(struct discover_server *server,
 	handler->n_devices = 0;
 	handler->server = server;
 	handler->dry_run = dry_run;
+	list_init(&handler->unresolved_boot_options);
 
 	/* set up our mount point base */
 	pb_mkdir_recursive(mount_base());