Struct DiskManager 

pub struct DiskManager { /* private fields */ }

Manages partition discovery and path resolution

Implementations

impl DiskManager

pub fn new(boot_handle: Handle) -> Result<Self>

Create a new DiskManager by discovering all partitions

Arguments

• boot_handle - The handle for the partition containing the bootloader

  (typically from LoadedImage protocol’s device_handle)

Process

1. Call LocateHandleBuffer for BlockIO protocol
2. Filter to only logical partitions (media.is_logical_partition())
3. For each partition, extract PARTUUID from device path
4. Store mapping of PARTUUID -> Handle

Errors

Returns error if:

• LocateHandleBuffer fails
• Cannot open BlockIO protocol on any handle
• Cannot allocate memory for partition list

pub fn resolve_path(&self, reference: &PathReference) -> Result<PoolDevicePath>

Resolve a partition reference to a UEFI handle

Arguments

• reference - The partition to locate

Returns

The UEFI handle for the partition, suitable for opening SimpleFileSystem

Behavior

• Boot: Returns cached boot_handle immediately (O(1))
• Guid: Linear search through partitions for matching GUID (O(n))

Errors

• NOT_FOUND if GUID doesn’t match any discovered partition