| 61 | |
| 62 | |
| 63 | NTSTATUS |
| 64 | Ext2ReadVolume (IN PEXT2_IRP_CONTEXT IrpContext) |
| 65 | { |
| 66 | NTSTATUS Status = STATUS_UNSUCCESSFUL; |
| 67 | |
| 68 | PEXT2_VCB Vcb = NULL; |
| 69 | PEXT2_CCB Ccb = NULL; |
| 70 | PEXT2_FCBVCB FcbOrVcb = NULL; |
| 71 | PFILE_OBJECT FileObject = NULL; |
| 72 | |
| 73 | PDEVICE_OBJECT DeviceObject = NULL; |
| 74 | |
| 75 | PIRP Irp = NULL; |
| 76 | PIO_STACK_LOCATION IoStackLocation = NULL; |
| 77 | |
| 78 | ULONG Length; |
| 79 | LARGE_INTEGER ByteOffset; |
| 80 | |
| 81 | BOOLEAN PagingIo; |
| 82 | BOOLEAN Nocache; |
| 83 | BOOLEAN SynchronousIo; |
| 84 | BOOLEAN MainResourceAcquired = FALSE; |
| 85 | |
| 86 | PUCHAR Buffer = NULL; |
| 87 | EXT2_EXTENT BlockArray; |
| 88 | |
| 89 | __try { |
| 90 | |
| 91 | ASSERT(IrpContext); |
| 92 | ASSERT((IrpContext->Identifier.Type == EXT2ICX) && |
| 93 | (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT))); |
| 94 | |
| 95 | DeviceObject = IrpContext->DeviceObject; |
| 96 | Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension; |
| 97 | ASSERT(Vcb != NULL); |
| 98 | ASSERT((Vcb->Identifier.Type == EXT2VCB) && |
| 99 | (Vcb->Identifier.Size == sizeof(EXT2_VCB))); |
| 100 | |
| 101 | FileObject = IrpContext->FileObject; |
| 102 | FcbOrVcb = (PEXT2_FCBVCB) FileObject->FsContext; |
| 103 | ASSERT(FcbOrVcb); |
| 104 | |
| 105 | if (!(FcbOrVcb->Identifier.Type == EXT2VCB && (PVOID)FcbOrVcb == (PVOID)Vcb)) { |
| 106 | |
| 107 | Status = STATUS_INVALID_DEVICE_REQUEST; |
| 108 | __leave; |
| 109 | } |
| 110 | |
| 111 | Ccb = (PEXT2_CCB) FileObject->FsContext2; |
| 112 | Irp = IrpContext->Irp; |
| 113 | Irp->IoStatus.Information = 0; |
| 114 | IoStackLocation = IoGetCurrentIrpStackLocation(Irp); |
| 115 | |
| 116 | Length = IoStackLocation->Parameters.Read.Length; |
| 117 | ByteOffset = IoStackLocation->Parameters.Read.ByteOffset; |
| 118 | |
| 119 | PagingIo = IsFlagOn(Irp->Flags, IRP_PAGING_IO); |
| 120 | Nocache = IsFlagOn(Irp->Flags, IRP_NOCACHE) || (Ccb != NULL); |
no test coverage detected