Struct GroupDescriptor 

pub struct GroupDescriptor {
    pub block_bitmap_lo: u32,
    pub inode_bitmap_lo: u32,
    pub inode_table_lo: u32,
    pub free_blocks_count_lo: u16,
    pub free_inodes_count_lo: u16,
    pub used_dirs_count_lo: u16,
    pub flags: u16,
    pub exclude_bitmap_lo: u32,
    pub block_bitmap_csum_lo: u16,
    pub inode_bitmap_csum_lo: u16,
    pub itable_unused_lo: u16,
    pub checksum: u16,
}

Block group descriptor (32-byte variant).

When the INCOMPAT_64BIT feature is set and desc_size >= 64, the kernel uses an extended 64-byte descriptor. We keep the 32-byte base here; callers can layer the hi-word fields on top when needed.

Fields

block_bitmap_lo: u32

inode_bitmap_lo: u32

inode_table_lo: u32

free_blocks_count_lo: u16

free_inodes_count_lo: u16

used_dirs_count_lo: u16

flags: u16

exclude_bitmap_lo: u32

block_bitmap_csum_lo: u16

inode_bitmap_csum_lo: u16

itable_unused_lo: u16

checksum: u16

Implementations

impl GroupDescriptor

pub const SIZE: usize = 32

pub fn read_from(buf: &[u8]) -> Self

pub fn write_to(&self, buf: &mut [u8])

Trait Implementations

impl Clone for GroupDescriptor

fn clone(&self) -> GroupDescriptor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GroupDescriptor

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

Formats the value using the given formatter.

impl Default for GroupDescriptor

fn default() -> GroupDescriptor

Returns the “default value” for a type.