diff options
Diffstat (limited to 'include/mtd')
| -rw-r--r-- | include/mtd/ubi-user.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h index 1c06d88..2b50dad 100644 --- a/include/mtd/ubi-user.h +++ b/include/mtd/ubi-user.h @@ -132,6 +132,16 @@ * used. A pointer to a &struct ubi_set_vol_prop_req object is expected to be * passed. The object describes which property should be set, and to which value * it should be set. + * + * Block devices on UBI volumes + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * To create a R/O block device on top of an UBI volume the %UBI_IOCVOLCRBLK + * should be used. A pointer to a &struct ubi_blkcreate_req object is expected + * to be passed, which is not used and reserved for future usage. + * + * Conversely, to remove a block device the %UBI_IOCVOLRMBLK should be used, + * which takes no arguments. */ /* @@ -186,6 +196,10 @@ /* Set an UBI volume property */ #define UBI_IOCSETVOLPROP _IOW(UBI_VOL_IOC_MAGIC, 6, \ struct ubi_set_vol_prop_req) +/* Create a R/O block device on top of an UBI volume */ +#define UBI_IOCVOLCRBLK _IOW(UBI_VOL_IOC_MAGIC, 7, struct ubi_blkcreate_req) +/* Remove the R/O block device */ +#define UBI_IOCVOLRMBLK _IO(UBI_VOL_IOC_MAGIC, 8) /* Maximum MTD device name length supported by UBI */ #define MAX_UBI_MTD_NAME_LEN 127 @@ -415,4 +429,12 @@ struct ubi_set_vol_prop_req { uint64_t value; } __attribute__((packed)); +/** + * struct ubi_blkcreate_req - a data structure used in block creation requests. + * @padding: reserved for future, not used, has to be zeroed + */ +struct ubi_blkcreate_req { + int8_t padding[128]; +} __attribute__((packed)); + #endif /* __UBI_USER_H__ */ |