[PATCH 1/4] mtd: ubi: Add API calls to create/remove volumes

[Sascha Hauer]

Currently we use a ioctl API to create/remove ubi volumes. This
means we always have to carry all function code for ubi volume
manipulation when the ioctl is compiled in.
This adds a function API to create/remove volumes so that the linker
can throw the unused code away later.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 drivers/mtd/ubi/barebox.c | 23 +++++++++++++++++++++++
 include/linux/mtd/ubi.h   |  3 +++
 2 files changed, 26 insertions(+)

diff --git a/drivers/mtd/ubi/barebox.c b/drivers/mtd/ubi/barebox.c
index fc60aae..13c2a47 100644
--- a/drivers/mtd/ubi/barebox.c
+++ b/drivers/mtd/ubi/barebox.c
@@ -257,6 +257,29 @@ void ubi_volume_cdev_remove(struct ubi_volume *vol)
 	kfree(priv);
 }
 
+int ubi_api_create_volume(int ubi_num, struct ubi_mkvol_req *req)
+{
+	struct ubi_device *ubi;
+	int ret;
+
+	ubi = ubi_get_device(ubi_num);
+	if (!ubi)
+		return -ENODEV;
+
+	if (!req->bytes)
+		req->bytes = (__s64)ubi->avail_pebs * ubi->leb_size;
+	ret = ubi_create_volume(ubi, req);
+
+	ubi_put_device(ubi);
+
+	return ret;
+}
+
+int ubi_api_remove_volume(struct ubi_volume_desc *desc, int no_vtbl)
+{
+	return ubi_remove_volume(desc, no_vtbl);
+}
+
 static int ubi_cdev_ioctl(struct cdev *cdev, int cmd, void *buf)
 {
 	struct ubi_volume_desc *desc;
diff --git a/include/linux/mtd/ubi.h b/include/linux/mtd/ubi.h
index 0614681..c72f95b 100644
--- a/include/linux/mtd/ubi.h
+++ b/include/linux/mtd/ubi.h
@@ -218,6 +218,9 @@ int ubi_is_mapped(struct ubi_volume_desc *desc, int lnum);
 int ubi_sync(int ubi_num);
 int ubi_flush(int ubi_num, int vol_id, int lnum);
 
+int ubi_api_create_volume(int ubi_num, struct ubi_mkvol_req *req);
+int ubi_api_remove_volume(struct ubi_volume_desc *desc, int no_vtbl);
+
 /*
  * This function is the same as the 'ubi_leb_read()' function, but it does not
  * provide the checking capability.
-- 
2.8.1