[PATCH 3/3] UBI: is_mapped operation via ioctl

[Corentin Chary]

From dbccb9a0ed4d9b9b45cbad2d13432bad6e9ca886 Mon Sep 17 00:00:00 2001
From: Corentin Chary <corentincj at iksaif.net>
Date: Mon, 5 Jan 2009 14:48:59 +0100

UBI: is_mapped operation via ioctl

Signed-off-by: Corentin Chary <corentincj at iksaif.net>
---
 drivers/mtd/ubi/cdev.c |   12 ++++++++++++
 include/mtd/ubi-user.h |    2 ++
 2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index 7a9080c..1bf21eb 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -542,6 +542,18 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file,
 		err = ubi_leb_unmap(desc, lnum);
 		break;
 	}
+	case UBI_IOISMAP:
+	{
+		int32_t lnum;
+
+		err = get_user(lnum, (__user int32_t *)argp);
+		if (err) {
+			err = -EFAULT;
+			break;
+		}
+		err = ubi_is_mapped(desc, lnum);
+		break;
+	}
 
 #endif
 
diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h
index bcff3a0..a65c4ab 100644
--- a/include/mtd/ubi-user.h
+++ b/include/mtd/ubi-user.h
@@ -137,6 +137,8 @@
 #define UBI_IOMAP   _IOW(UBI_VOL_IOC_MAGIC, 3, struct ubi_map_req)
 /* Unmap an eraseblock */
 #define UBI_IOUNMAP _IOW(UBI_VOL_IOC_MAGIC, 4, int32_t)
+/* Check whether an eraseblock is mapped */
+#define UBI_IOISMAP _IOR(UBI_VOL_IOC_MAGIC, 5, int32_t)
 
 /* Maximum MTD device name length supported by UBI */
 #define MAX_UBI_MTD_NAME_LEN 127
-- 
1.6.0.6