FsRtlGetNextLargeMcbEntry - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// ntifs.h
BOOLEAN FsRtlGetNextLargeMcbEntry(
PLARGE_MCB Mcb,
[in] ULONG RunIndex,
PLONGLONG Vbn,
PLONGLONG Lbn,
PLONGLONG SectorCount
);
View the official Windows Driver Kit DDI referenceNo description available.
The FsRtlGetNextLargeMcbEntry routine retrieves a mapping run from a map control block (MCB).
McbPointer to an initialized MCB structure.
RunIndex [in]Zero-based index of the requested mapping run.
VbnPointer to a variable that receives the starting virtual block number (VBN) of the mapping run, or zero if the run does not exist. Its value is meaningless if FsRtlGetNextLargeMcbEntry returns FALSE.
LbnPointer to a variable that receives the starting logical block number (LBN) of the mapping run, or zero if the run does not exist. Its value is meaningless if FsRtlGetNextLargeMcbEntry returns FALSE.
SectorCountPointer to a variable that receives the number of sectors in the mapping run, or zero if the run does not exist. Its value is meaningless if FsRtlGetNextLargeMcbEntry returns FALSE.
FsRtlGetNextLargeMcbEntry returns TRUE if the requested mapping run exists in the MCB, FALSE otherwise.
FsRtlGetNextLargeMcbEntry retrieves the starting VBN, starting LBN, and sector count for a mapping run in an MCB.
Note The upper 32 bits of the LBN are ignored. Only the lower 32 bits are used.
Holes are counted as runs.
The following code snippet shows how to print out all of the runs in a file:
for (i = 0; FsRtlGetNextLargeMcbEntry(Mcb,i,&Vbn,&Lbn,&Count); i++) {
// print out vbn, lbn, and count
}
FsRtlLookupLastLargeMcbEntryAndIndex