Function Ext2RemoveVcbExtent

Ext4Fsd/memory.c:697–742

}

BOOLEAN
Ext2RemoveVcbExtent (
    IN PEXT2_VCB Vcb,
    IN LONGLONG  Vbn,
    IN LONGLONG  Length
)
{
    ULONG       TriedTimes = 0;
    LONGLONG    Offset = 0;
    BOOLEAN     rc = TRUE;

    Offset =  Vbn & (~(Vcb->IoUnitSize - 1));
    Length = (Length + Vbn - Offset + Vcb->IoUnitSize - 1) & (~(Vcb->IoUnitSize - 1));

    ASSERT ((Offset & (Vcb->IoUnitSize - 1)) == 0);
    ASSERT ((Length & (Vcb->IoUnitSize - 1)) == 0);

    Offset = (Offset >> Vcb->IoUnitBits) + 1;
    Length = (Length >> Vcb->IoUnitBits);

Again:

    __try {
        FsRtlRemoveLargeMcbEntry(
            &Vcb->Extents,
            Offset,
            Length
        );
    } __except (EXCEPTION_EXECUTE_HANDLER) {
        DbgBreak();
        rc = FALSE;
    }

    if (!rc && ++TriedTimes < 10) {
        Ext2Sleep(TriedTimes * 100);
        goto Again;
    }

    DEBUG(DL_EXT, ("Ext2RemoveVcbExtent: Vbn=%I64xh Length=%I64xh Runs=%u\n",
                   Offset, Length, FsRtlNumberOfRunsInLargeMcb(&Vcb->Extents)));
    if (rc) {
        Ext2CheckExtent(&Vcb->Extents, Offset, 0, Length, FALSE);
    }

    return rc;
}

BOOLEAN
Ext2LookupVcbExtent (