| 742 | } |
| 743 | |
| 744 | BOOLEAN |
| 745 | Ext2LookupVcbExtent ( |
| 746 | IN PEXT2_VCB Vcb, |
| 747 | IN LONGLONG Vbn, |
| 748 | OUT PLONGLONG Lbn, |
| 749 | OUT PLONGLONG Length |
| 750 | ) |
| 751 | { |
| 752 | LONGLONG offset; |
| 753 | BOOLEAN rc; |
| 754 | |
| 755 | offset = Vbn & (~(Vcb->IoUnitSize - 1)); |
| 756 | ASSERT ((offset & (Vcb->IoUnitSize - 1)) == 0); |
| 757 | offset = (offset >> Vcb->IoUnitBits) + 1; |
| 758 | |
| 759 | rc = FsRtlLookupLargeMcbEntry( |
| 760 | &(Vcb->Extents), |
| 761 | offset, |
| 762 | Lbn, |
| 763 | Length, |
| 764 | NULL, |
| 765 | NULL, |
| 766 | NULL |
| 767 | ); |
| 768 | |
| 769 | if (rc) { |
| 770 | |
| 771 | if (Lbn && ((*Lbn) != -1)) { |
| 772 | ASSERT((*Lbn) > 0); |
| 773 | (*Lbn) = (((*Lbn) - 1) << Vcb->IoUnitBits); |
| 774 | (*Lbn) += ((Vbn) & (Vcb->IoUnitSize - 1)); |
| 775 | } |
| 776 | |
| 777 | if (Length && *Length) { |
| 778 | (*Length) <<= Vcb->IoUnitBits; |
| 779 | (*Length) -= ((Vbn) & (Vcb->IoUnitSize - 1)); |
| 780 | } |
| 781 | } |
| 782 | |
| 783 | return rc; |
| 784 | } |
| 785 | |
| 786 | |
| 787 | BOOLEAN |
no outgoing calls
no test coverage detected