| 861 | |
| 862 | |
| 863 | NTSTATUS |
| 864 | Ext2Read (IN PEXT2_IRP_CONTEXT IrpContext) |
| 865 | { |
| 866 | NTSTATUS Status; |
| 867 | PEXT2_VCB Vcb; |
| 868 | PEXT2_FCBVCB FcbOrVcb; |
| 869 | PDEVICE_OBJECT DeviceObject; |
| 870 | PFILE_OBJECT FileObject; |
| 871 | BOOLEAN bCompleteRequest; |
| 872 | |
| 873 | ASSERT(IrpContext); |
| 874 | |
| 875 | ASSERT((IrpContext->Identifier.Type == EXT2ICX) && |
| 876 | (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT))); |
| 877 | |
| 878 | __try { |
| 879 | |
| 880 | if (FlagOn(IrpContext->MinorFunction, IRP_MN_COMPLETE)) { |
| 881 | |
| 882 | Status = Ext2ReadComplete(IrpContext); |
| 883 | bCompleteRequest = FALSE; |
| 884 | |
| 885 | } else { |
| 886 | |
| 887 | DeviceObject = IrpContext->DeviceObject; |
| 888 | |
| 889 | if (IsExt2FsDevice(DeviceObject)) { |
| 890 | Status = STATUS_INVALID_DEVICE_REQUEST; |
| 891 | bCompleteRequest = TRUE; |
| 892 | __leave; |
| 893 | } |
| 894 | |
| 895 | Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension; |
| 896 | if (Vcb->Identifier.Type != EXT2VCB || |
| 897 | Vcb->Identifier.Size != sizeof(EXT2_VCB) ) { |
| 898 | Status = STATUS_INVALID_DEVICE_REQUEST; |
| 899 | bCompleteRequest = TRUE; |
| 900 | |
| 901 | __leave; |
| 902 | } |
| 903 | |
| 904 | FileObject = IrpContext->FileObject; |
| 905 | |
| 906 | if (FlagOn(Vcb->Flags, VCB_VOLUME_LOCKED) && |
| 907 | Vcb->LockFile != FileObject ) { |
| 908 | Status = STATUS_ACCESS_DENIED; |
| 909 | __leave; |
| 910 | } |
| 911 | |
| 912 | FcbOrVcb = (PEXT2_FCBVCB) FileObject->FsContext; |
| 913 | |
| 914 | if (FcbOrVcb->Identifier.Type == EXT2VCB) { |
| 915 | |
| 916 | Status = Ext2ReadVolume(IrpContext); |
| 917 | bCompleteRequest = FALSE; |
| 918 | |
| 919 | } else if (FcbOrVcb->Identifier.Type == EXT2FCB) { |
| 920 |
no test coverage detected