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UBI: add ioctl for is_mapped operation 

This patch adds ioctl to check if an LEB is mapped or not (as a
debugging option so far).

[Re-named ioctl to make it look the same as the other one and made
 some minor stylistic changes. Artem Bityutskiy.]

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Corentin Chary 2009-01-05 14:48:59 +01:00 committed by Artem Bityutskiy
parent c3da23be16
commit a27ce8f55d
2 changed files with 16 additions and 0 deletions
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14
drivers/mtd/ubi/cdev.c
View File

@ -546,6 +546,20 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file,
err = ubi_leb_unmap(desc, lnum);
break;
}
/* Check if logical eraseblock is mapped command */
case UBI_IOCEBISMAP:
{
int32_t lnum;
err = get_user(lnum, (__user int32_t *)argp);
if (err) {
err = -EFAULT;
break;
}
err = ubi_is_mapped(desc, lnum);
break;
}
#endif
default:

2
include/mtd/ubi-user.h
View File

@ -137,6 +137,8 @@
#define UBI_IOCEBMAP _IOW(UBI_VOL_IOC_MAGIC, 3, struct ubi_map_req)
/* Unmap an eraseblock, used for debugging, disabled by default */
#define UBI_IOCEBUNMAP _IOW(UBI_VOL_IOC_MAGIC, 4, int32_t)
/* Check if an eraseblock is mapped, used for debugging, disabled by default */
#define UBI_IOCEBISMAP _IOR(UBI_VOL_IOC_MAGIC, 5, int32_t)
/* Maximum MTD device name length supported by UBI */
#define MAX_UBI_MTD_NAME_LEN 127