Struct HeaderOffsets 

pub struct HeaderOffsets {
    pub vid_header_offset: u32,
    pub data_offset: u32,
}

Offsets of the VID header and the data in each erase block.

The flash decides them, and super::ImageReader needs them because an image doesn’t store them.

Fields

vid_header_offset: u32

Offset of the super::VidHeader.

data_offset: u32

Offset of the data.

Implementations

impl HeaderOffsets

pub fn from_io_sizes(min_io_size: u32, subpage_size: u32) -> Option<Self>

Returns the offsets that the kernel and ubinize use by default.

The VID header starts at the first multiple of subpage_size after the EC header, and the data at the first multiple of min_io_size after the VID header. min_io_size is the page size, as in flashkit_mtd::Geometry::page_size. NAND with subpages writes the headers in smaller units. Its subpage size is in /sys/class/mtd/mtdN/subpagesize. Without subpages, it equals the page size.

Returns None if a size isn’t a power of two, the subpage size is larger than min_io_size or an offset doesn’t fit into a u32.

pub(crate) fn fit(self, block_size: usize) -> bool

Returns whether the kernel accepts the offsets for a block of block_size bytes.

Trait Implementations

impl Clone for HeaderOffsets

fn clone(&self) -> HeaderOffsets

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for HeaderOffsets

impl Debug for HeaderOffsets

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

Formats the value using the given formatter.

impl Eq for HeaderOffsets

impl PartialEq for HeaderOffsets

fn eq(&self, other: &HeaderOffsets) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for HeaderOffsets