FsRtlTruncateLargeMcb function (ntifs.h)
The FsRtlTruncateLargeMcb routine truncates a large map control block (MCB).
Syntax
void FsRtlTruncateLargeMcb(
PLARGE_MCB Mcb,
LONGLONG Vbn
);
Parameters
Mcb
Pointer to the MCB structure.
Vbn
Starting virtual block number (VBN) of the range of mappings to be removed from the MCB.
Return value
None
Remarks
FsRtlTruncateLargeMcb truncates an MCB structure by removing all mappings for VBNs in the range starting with *LargeVbn and ending with the highest mapped VBN. If the starting VBN belongs to a hole (a range of unmapped VBNs that form a gap between two mappings), the hole is also removed. The MCB's PairCount member is adjusted accordingly.
If the starting VBN is zero, all mappings are removed from the MCB.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Universal |
| Header | ntifs.h (include Ntifs.h) |
| Library | NtosKrnl.lib |
| DLL | NtosKrnl.exe |
| IRQL | <= APC_LEVEL |