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UBI: add ioctl for map operation

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This patch adds ioctl for the LEB map operation (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 14:44:11 +01:00 committed by Artem Bityutskiy
parent 1de9e8e70f
commit 141e6ebd1b
2 changed files with 29 additions and 0 deletions
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14
drivers/mtd/ubi/cdev.c
View file

@ -518,6 +518,20 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file,
err = ubi_wl_flush(ubi); err = ubi_wl_flush(ubi);
break; break;
} }
/* Logical eraseblock map command */
case UBI_IOCEBMAP:
{
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 #endif
default: default:

15
include/mtd/ubi-user.h
View file

@ -133,6 +133,9 @@
#define UBI_IOCEBER _IOW(UBI_VOL_IOC_MAGIC, 1, int32_t) #define UBI_IOCEBER _IOW(UBI_VOL_IOC_MAGIC, 1, int32_t)
/* An atomic eraseblock change command */ /* An atomic eraseblock change command */
#define UBI_IOCEBCH _IOW(UBI_VOL_IOC_MAGIC, 2, int32_t) #define UBI_IOCEBCH _IOW(UBI_VOL_IOC_MAGIC, 2, int32_t)
/* Map an eraseblock, used for debugging, disabled by default */
#define UBI_IOCEBMAP _IOW(UBI_VOL_IOC_MAGIC, 3, struct ubi_map_req)
/* Maximum MTD device name length supported by UBI */ /* Maximum MTD device name length supported by UBI */
#define MAX_UBI_MTD_NAME_LEN 127 #define MAX_UBI_MTD_NAME_LEN 127
@ -319,4 +322,16 @@ struct ubi_leb_change_req {
int8_t padding[7]; int8_t padding[7];
} __attribute__ ((packed)); } __attribute__ ((packed));
/**
* struct ubi_map_req - a data structure used in map eraseblock requests.
* @lnum: logical eraseblock number to unmap
* @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__ */ #endif /* __UBI_USER_H__ */