bbu: add function to directly add handlers into file_list

bbu_handlers_iterate() is only used for merging handlers into a
file_list. This can be useful for other update mechanisms as well.

Export a bbu_append_handlers_to_file_list that does this.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20210503114901.13095-14-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 26 insertions, 29 deletions

diff --git a/common/bbu.c b/common/bbu.c
index ee9f78ecc9..1a1edda96b 100644
--- a/common/bbu.c
+++ b/common/bbu.c
@@ -16,22 +16,28 @@
 #include <malloc.h>
 #include <linux/stat.h>
 #include <image-metadata.h>
+#include <file-list.h>
 
 static LIST_HEAD(bbu_image_handlers);
 
-int bbu_handlers_iterate(int (*fn)(struct bbu_handler *, void *), void *ctx)
+static void append_bbu_entry(struct bbu_handler *handler, struct file_list *files)
 {
-	struct bbu_handler *handler;
+	char *name;
 
-	list_for_each_entry(handler, &bbu_image_handlers, list) {
-		int ret;
+	name = basprintf("bbu-%s", handler->name);
 
-		ret = fn(handler, ctx);
-		if (ret)
-			return ret;
-	}
+	if (file_list_add_entry(files, name, handler->devicefile, 0))
+		pr_warn("duplicate partition name %s\n", name);
 
-	return 0;
+	free(name);
+}
+
+void bbu_append_handlers_to_file_list(struct file_list *files)
+{
+	struct bbu_handler *handler;
+
+	list_for_each_entry(handler, &bbu_image_handlers, list)
+		append_bbu_entry(handler, files);
 }
 
 int bbu_force(struct bbu_data *data, const char *fmt, ...)
diff --git a/common/fastboot.c b/common/fastboot.c
index dc80b66e67..75f6691b08 100644
--- a/common/fastboot.c
+++ b/common/fastboot.c
@@ -150,23 +150,6 @@ out:
 	return ret;
 }
 
-static int fastboot_add_bbu_variables(struct bbu_handler *handler, void *ctx)
-{
-	struct fastboot *fb = ctx;
-	char *name;
-	int ret;
-
-	name = basprintf("bbu-%s", handler->name);
-
-	ret = file_list_add_entry(fb->files, name, handler->devicefile, 0);
-	if (ret)
-		pr_warn("duplicate partition name %s\n", name);
-
-	free(name);
-
-	return 0;
-}
-
 int fastboot_generic_init(struct fastboot *fb, bool export_bbu)
 {
 	int ret;
@@ -188,8 +171,8 @@ int fastboot_generic_init(struct fastboot *fb, bool export_bbu)
 	if (!fb->tempname)
 		return -ENOMEM;
 
-	if (IS_ENABLED(CONFIG_BAREBOX_UPDATE) && export_bbu)
-		bbu_handlers_iterate(fastboot_add_bbu_variables, fb);
+	if (export_bbu)
+		bbu_append_handlers_to_file_list(fb->files);
 
 	file_list_for_each_entry(fb->files, fentry) {
 		ret = fastboot_add_partition_variables(fb, fentry);
diff --git a/include/bbu.h b/include/bbu.h
index 3b9d2f4bf1..3128339068 100644
--- a/include/bbu.h
+++ b/include/bbu.h
@@ -48,7 +48,7 @@ struct bbu_handler *bbu_find_handler_by_device(const char *devicepath);
 
 void bbu_handlers_list(void);
 
-int bbu_handlers_iterate(int (*fn)(struct bbu_handler *, void *), void *);
+struct file_list;
 
 #ifdef CONFIG_BAREBOX_UPDATE
 
@@ -57,6 +57,8 @@ int bbu_register_handler(struct bbu_handler *);
 int bbu_register_std_file_update(const char *name, unsigned long flags,
 		const char *devicefile, enum filetype imagetype);
 
+void bbu_append_handlers_to_file_list(struct file_list *files);
+
 #else
 
 static inline int bbu_register_handler(struct bbu_handler *unused)
@@ -69,6 +71,12 @@ static inline int bbu_register_std_file_update(const char *name, unsigned long f
 {
 	return -ENOSYS;
 }
+
+static inline void bbu_append_handlers_to_file_list(struct file_list *files)
+{
+	/* none could be registered, so nothing to do */
+}
+
 #endif
 
 #if defined(CONFIG_BAREBOX_UPDATE_IMX_NAND_FCB)