Struct LogEntryHeader 

pub struct LogEntryHeader<'a> { /* private fields */ }

Log entry header (64 bytes).

Layout (MS-VHDX §2.3.1.1):

[0..4]   Signature ("loge")
[4..8]   Checksum (CRC-32C)
[8..12]  EntryLength
[12..16] Tail
[16..24] SequenceNumber
[24..28] DescriptorCount
[28..32] Reserved
[32..48] LogGuid
[48..56] FlushedFileOffset
[56..64] LastFileOffset

Implementations

impl<'a> LogEntryHeader<'a>

pub fn signature(&self) -> &'a [u8; 4]

Entry signature. MUST be "loge" (0x65676F6C).

Panics

Panics if the header slice is shorter than 4 bytes.

pub fn checksum(&self) -> Crc32c

CRC-32C checksum computed over the entire entry (checksum field zeroed).

pub fn entry_length(&self) -> u32

Total length of the entry in bytes. MUST be a multiple of 4KB.

pub fn tail(&self) -> u32

Offset from log start to the first entry of the active sequence. MUST be a multiple of 4KB.

pub fn sequence_number(&self) -> u64

Monotonically increasing sequence number. MUST be > 0.

pub fn descriptor_count(&self) -> u32

Number of descriptors in this entry.

pub fn reserved(&self) -> u32

Reserved. MUST be 0.

pub fn log_guid(&self) -> Guid

LogGuid that was present in the file header when this entry was written.

pub fn flushed_file_offset(&self) -> u64

VHDX file size guaranteed to be stable on disk.

pub fn last_file_offset(&self) -> u64

File size that all allocated structures fit into.