include/uapi/mtd/ubi-user.h

Source file repositories/reference/linux-study-clean/include/uapi/mtd/ubi-user.h

File Facts

System
Linux kernel
Corpus path
include/uapi/mtd/ubi-user.h
Extension
.h
Size
19854 bytes
Lines
507
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct ubi_attach_req {
	__s32 ubi_num;
	__s32 mtd_num;
	__s32 vid_hdr_offset;
	__s16 max_beb_per1024;
	__s8 disable_fm;
	__s8 need_resv_pool;
	__s8 padding[8];
};

/*
 * UBI volume flags.
 *
 * @UBI_VOL_SKIP_CRC_CHECK_FLG: skip the CRC check done on a static volume at
 *				open time. Only valid for static volumes and
 *				should only be used if the volume user has a
 *				way to verify data integrity
 */
enum {
	UBI_VOL_SKIP_CRC_CHECK_FLG = 0x1,
};

#define UBI_VOL_VALID_FLGS	(UBI_VOL_SKIP_CRC_CHECK_FLG)

/**
 * struct ubi_mkvol_req - volume description data structure used in
 *                        volume creation requests.
 * @vol_id: volume number
 * @alignment: volume alignment
 * @bytes: volume size in bytes
 * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
 * @flags: volume flags (%UBI_VOL_SKIP_CRC_CHECK_FLG)
 * @name_len: volume name length
 * @padding2: reserved for future, not used, has to be zeroed
 * @name: volume name
 *
 * This structure is used by user-space programs when creating new volumes. The
 * @used_bytes field is only necessary when creating static volumes.
 *
 * The @alignment field specifies the required alignment of the volume logical
 * eraseblock. This means, that the size of logical eraseblocks will be aligned
 * to this number, i.e.,
 *	(UBI device logical eraseblock size) mod (@alignment) = 0.
 *
 * To put it differently, the logical eraseblock of this volume may be slightly
 * shortened in order to make it properly aligned. The alignment has to be
 * multiple of the flash minimal input/output unit, or %1 to utilize the entire
 * available space of logical eraseblocks.
 *
 * The @alignment field may be useful, for example, when one wants to maintain
 * a block device on top of an UBI volume. In this case, it is desirable to fit
 * an integer number of blocks in logical eraseblocks of this UBI volume. With
 * alignment it is possible to update this volume using plane UBI volume image
 * BLOBs, without caring about how to properly align them.
 */
struct ubi_mkvol_req {
	__s32 vol_id;
	__s32 alignment;
	__s64 bytes;
	__s8 vol_type;
	__u8 flags;
	__s16 name_len;
	__s8 padding2[4];
	char name[UBI_MAX_VOLUME_NAME + 1];
} __packed;

/**
 * struct ubi_rsvol_req - a data structure used in volume re-size requests.
 * @vol_id: ID of the volume to re-size
 * @bytes: new size of the volume in bytes
 *
 * Re-sizing is possible for both dynamic and static volumes. But while dynamic
 * volumes may be re-sized arbitrarily, static volumes cannot be made to be
 * smaller than the number of bytes they bear. To arbitrarily shrink a static
 * volume, it must be wiped out first (by means of volume update operation with
 * zero number of bytes).
 */
struct ubi_rsvol_req {
	__s64 bytes;
	__s32 vol_id;
} __packed;

/**
 * struct ubi_rnvol_req - volumes re-name request.
 * @count: count of volumes to re-name
 * @padding1:  reserved for future, not used, has to be zeroed
 * @vol_id: ID of the volume to re-name
 * @name_len: name length
 * @padding2:  reserved for future, not used, has to be zeroed
 * @name: new volume name

Annotation

Implementation Notes