Struct ImageBlock 

pub struct ImageBlock<'a> {
    index: u32,
    ec: Option<EcHeader>,
    vid: Option<VidHeader>,
    bytes: &'a [u8],
}

Erase block of a UBI image.

Returned by ImageReader::next_block.

Fields

index: u32

ec: Option<EcHeader>

vid: Option<VidHeader>

bytes: &'a [u8]

Implementations

impl<'a> ImageBlock<'a>

pub const fn index(&self) -> u32

Returns the index of the block in the image.

pub const fn ec_header(&self) -> Option<&EcHeader>

Returns the erase counter header, or None for an erased block.

pub const fn vid_header(&self) -> Option<&VidHeader>

Returns the volume identifier header, or None if the block doesn’t contain data.

pub fn leb_size(&self) -> Option<u32>

Returns the size of a logical eraseblock, or None for an erased block.

pub const fn bytes(&self) -> &'a [u8]

Returns all bytes of the block.

pub fn data(&self) -> &'a [u8]

Returns the data of the logical eraseblock, or an empty slice if the block doesn’t contain data.

For a static volume or a copy that wear leveling made, it’s exactly VidHeader::data_size bytes. Otherwise it excludes the padding that the volume’s alignment leaves at the end of the block.

ImageBlock::check_data_crc checks the data of a static volume or a copy.

pub fn check_data_crc(&self) -> Result<(), FormatError>

Checks the data against the CRC in the VID header.

Only static volumes and copies that wear leveling made store a CRC. For other blocks it does nothing. The kernel rejects reads of static data with a wrong CRC. Newer kernels skip the check if super::VolumeRecord::skip_crc_check is set. The kernel uses an older copy of a block instead of a damaged copy.

Errors

Returns FormatError::Crc if the data doesn’t match the CRC.

Trait Implementations

impl<'a> Clone for ImageBlock<'a>

fn clone(&self) -> ImageBlock<'a>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Copy for ImageBlock<'a>

impl Debug for ImageBlock<'_>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.