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CLS_LSN structure (wdm.h)

  • Article

The CLFS_LSN structure identifies an individual record in a Common Log File System (CLFS) stream.

Syntax

typedef struct _CLS_LSN {
  ULONGLONG Internal;
} CLS_LSN, *PCLS_LSN, PPCLS_LSN;

Members

Internal

A 64-bit value that holds three pieces of information about a log record: container identifier, block offset, and record sequence number.

Remarks

A container is a contiguous physical disk extent that serves as part of a CLFS log. A given CLFS log has several containers. Each container has several sector-aligned blocks, each of which holds a numbered sequence of records. A record can be identified by the triple (logical container identifier, block offset, record sequence number).

To obtain the container identifier, block offset, and record sequence number from a CLFS_LSN structure, call ClfsLsnContainer, ClfsLsnBlockOffset, and ClfsLsnRecordSequence.

Requirements

Requirement Value
Header wdm.h (include Wdm.h)