Struct InodeBitmap 

#[repr(C, packed(1))]
pub struct InodeBitmap {
    bits: [u64; 512],
}

Represents the on-disk inode allocation bitmap for the file system.

Each bit in the InodeBitmap corresponds to a single inode on disk. A bit value of 1 indicates that the inode is in use, while 0 means the inode is free and available for allocation.

Fields

bits: [u64; 512]

Implementations

impl InodeBitmap

pub fn is_allocated(&self, pos: usize) -> bool

Checks whether a inode at the given position is allocated.

Parameters

• pos: The index of the inode to check.

Returns

• true if the inode is currently marked as allocated (bit is 1).
• false if the inode is free (bit is 0).

This method is used to determine the allocation status of a inode in the file system’s inode bitmap.

pub fn try_allocate(&mut self, pos: usize) -> bool

Attempts to allocate a inode at the given position.

Parameters

• pos: The index of the inode to allocate.

Returns

• true if the inode was previously free and is now marked as allocated.
• false if the inode was already allocated (no change).

This method is used during inode allocation to claim a free inode. If the inode is already allocated, it fails without modifying the bitmap.

pub fn deallocate(&mut self, pos: usize) -> bool

Trait Implementations

impl Default for InodeBitmap

fn default() -> Self

Returns the “default value” for a type.

impl MetaData for InodeBitmap

fn load( ffs: &FastFileSystemInner, lba: LogicalBlockAddress, ) -> Result<BlockPointsTo<Self>, KernelError>

Loads a metadata structure from disk at the specified logical block address.