FsRtlResetLargeMcb - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// ntifs.h
VOID FsRtlResetLargeMcb(
[in] PLARGE_MCB Mcb,
[in] BOOLEAN SelfSynchronized
);
View the official Windows Driver Kit DDI referenceNo description available.
The FsRtlResetLargeMcb routine truncates a map control block (MCB) structure to contain zero mapping pairs. It does not shrink the mapping pairs array.
Mcb [in]Pointer to the MCB structure to truncate.
SelfSynchronized [in]Indicates whether the caller is already synchronized with respect to the MCB.
FsRtlResetLargeMcb truncates a map control block (MCB) structure. File systems use MCB structures to map virtual block numbers (VBN) for a file to the corresponding logical block numbers (LBN) on disk.
Note The upper 32 bits of the LBN are ignored. Only the lower 32 bits are used.
File systems must call FsRtlInitializeLargeMcb before using any other FsRtl...Mcb... routines on the MCB structure.
If the caller is already synchronized (the SelfSynchronized parameter is set to TRUE), such that no other thread of operation can call an Mcb routine on this MCB during this call, then FsRtlResetLargeMcb just clears out the current mapping pair count. If the SelfSynchronized parameter is set to FALSE, then FsRtlResetLargeMcb will serialize access to the Mcb before clearing the pair count which requires more time.
FsRtlLookupLastLargeMcbEntryAndIndex