[PATCH 1/3] UBI: map operation via ioctl

[Corentin Chary]

From: Corentin Chary <corentincj at iksaif.net>

UBI: map operation via ioctl

Signed-off-by: Corentin Chary <corentincj at iksaif.net>
---
 drivers/mtd/ubi/cdev.c |   13 +++++++++++++
 include/mtd/ubi-user.h |   16 ++++++++++++++++
 2 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index 98cf31e..db47121 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -518,6 +518,19 @@ static int vol_cdev_ioctl(struct inode *inode,
struct file *file,
 		err = ubi_wl_flush(ubi);
 		break;
 	}
+	case UBI_IOMAP:
+	{
+		struct ubi_map_req req;
+		err = copy_from_user(&req, argp,
+				sizeof(struct ubi_map_req));
+		if (err) {
+			err = -EFAULT;
+			break;
+		}
+		err = ubi_leb_map(desc, req.lnum, req.dtype);
+		break;
+	}
+
 #endif

 	default:
diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h
index ccdc562..8222f12 100644
--- a/include/mtd/ubi-user.h
+++ b/include/mtd/ubi-user.h
@@ -133,6 +133,9 @@
 #define UBI_IOCEBER _IOW(UBI_VOL_IOC_MAGIC, 1, int32_t)
 /* An atomic eraseblock change command */
 #define UBI_IOCEBCH _IOW(UBI_VOL_IOC_MAGIC, 2, int32_t)
+/* Map an eraseblock */
+#define UBI_IOMAP   _IOW(UBI_VOL_IOC_MAGIC, 3, struct ubi_map_req)
+

 /* Maximum MTD device name length supported by UBI */
 #define MAX_UBI_MTD_NAME_LEN 127
@@ -319,4 +322,17 @@ struct ubi_leb_change_req {
 	int8_t  padding[7];
 } __attribute__ ((packed));

+/**
+ * struct ubi_map_req - a data structure used in map
+ *                      eraseblock requests.
+ * @lnum: logical eraseblock number to change
+ * @dtype: data type (%UBI_LONGTERM, %UBI_SHORTTERM, %UBI_UNKNOWN)
+ * @padding: reserved for future, not used, has to be zeroed
+ */
+struct ubi_map_req {
+	int32_t lnum;
+	int8_t  dtype;
+	int8_t  padding[3];
+} __attribute__ ((packed));
+
 #endif /* __UBI_USER_H__ */
-- 
1.6.0.6