FsRtlAddBaseMcbEntryEx - NtDoc
Native API online documentation, based on the System Informer
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headers
// ntifs.h
NTSTATUS FsRtlAddBaseMcbEntryEx(
PBASE_MCB Mcb,
LONGLONG Vbn,
LONGLONG Lbn,
LONGLONG SectorCount
);
View the official Windows Driver Kit DDI referenceNo description available.
The FsRtlAddBaseMcbEntryEx function is used to add a new mapping of virtual block numbers (VBN's) to logical block numbers (LBN's) to an existing map control block (MCB).
McbSupplies the Mcb in which to add the new mapping.
VbnSupplies the starting VBN of the new mapping run to add to the Mcb.
LbnSupplies the starting Lbn of the new mapping run to add to the Mcb.
SectorCountSupplies the size of the new mapping run (in sectors).
This function returns one of the following NTSTATUS values:
| Status | Meaning |
|---|---|
| STATUS_SUCCESSFUL | the mapping was added successfully (i.e., the new VBNs did not collide with existing VBNs), |
| STATUS_INSUFFICIENT_RESOURCES | There wasn't memory to add the new mapping. |
| STATUS_UNSUCCESSFULL | There was a collision with the new VBN's and existing VBN's. |
The mapping for the VBNs must not already exist in the Mcb. If the mapping continues a previous run, then this routine will actually coalesce them into 1 run.
If pool is not available to store the information this routine will raise a status value indicating insufficient resources.
An input Lbn value of zero is illegal (i.e., the Mcb structure will never map a VBN to a zero Lbn value).