[fastfat_new]

[reactos.git] / reactos / drivers / filesystems / fastfat_new / finfo.c

diff --git a/reactos/drivers/filesystems/fastfat_new/finfo.c b/reactos/drivers/filesystems/fastfat_new/finfo.c
index 1aeb0d6..1183d72 100644 (file)
--- a/reactos/drivers/filesystems/fastfat_new/finfo.c
+++ b/reactos/drivers/filesystems/fastfat_new/finfo.c
@@ -13,12 +13,157 @@
 
 /* FUNCTIONS ****************************************************************/
 
+VOID
+NTAPI
+FatiQueryStandardInformation(IN PFAT_IRP_CONTEXT IrpContext,
+                             IN PFCB Fcb,
+                             IN PFILE_OBJECT FileObject,
+                             IN OUT PFILE_STANDARD_INFORMATION Buffer,
+                             IN OUT PLONG Length)
+{
+    /* Zero the buffer */
+    RtlZeroMemory(Buffer, sizeof(FILE_STANDARD_INFORMATION));
+
+    /* Deduct the written length */
+    *Length -= sizeof(FILE_STANDARD_INFORMATION);
+
+    Buffer->NumberOfLinks = 1;
+    Buffer->DeletePending = FALSE; // FIXME
+
+    /* Check if it's a dir or a file */
+    if (FatNodeType(Fcb) == FAT_NTC_FCB)
+    {
+        Buffer->Directory = FALSE;
+
+        Buffer->EndOfFile.LowPart = Fcb->FatHandle->Filesize;
+        Buffer->AllocationSize = Buffer->EndOfFile;
+        DPRINT1("Filesize %d, chain length %d\n", Fcb->FatHandle->Filesize, Fcb->FatHandle->iChainLength);
+    }
+    else
+    {
+        Buffer->Directory = TRUE;
+    }
+}
+
+VOID
+NTAPI
+FatiQueryInternalInformation(IN PFAT_IRP_CONTEXT IrpContext,
+                             IN PFCB Fcb,
+                             IN PFILE_OBJECT FileObject,
+                             IN OUT PFILE_INTERNAL_INFORMATION Buffer,
+                             IN OUT PLONG Length)
+{
+    UNIMPLEMENTED;
+}
+
+NTSTATUS
+NTAPI
+FatiQueryInformation(IN PFAT_IRP_CONTEXT IrpContext,
+                     IN PIRP Irp)
+{
+    PFILE_OBJECT FileObject;
+    PIO_STACK_LOCATION IrpSp;
+    FILE_INFORMATION_CLASS InfoClass;
+    TYPE_OF_OPEN FileType;
+    PVCB Vcb;
+    PFCB Fcb;
+    PCCB Ccb;
+    LONG Length;
+    PVOID Buffer;
+    NTSTATUS Status = STATUS_SUCCESS;
+
+    /* Get IRP stack location */
+    IrpSp = IoGetCurrentIrpStackLocation(Irp);
+
+    /* Get the file object */
+    FileObject = IrpSp->FileObject;
+
+    /* Copy variables to something with shorter names */
+    InfoClass = IrpSp->Parameters.QueryFile.FileInformationClass;
+    Length = IrpSp->Parameters.QueryFile.Length;
+    Buffer = Irp->AssociatedIrp.SystemBuffer;
+
+    DPRINT1("FatiQueryInformation\n", 0);
+    DPRINT1("\tIrp                  = %08lx\n", Irp);
+    DPRINT1("\tLength               = %08lx\n", Length);
+    DPRINT1("\tFileInformationClass = %08lx\n", InfoClass);
+    DPRINT1("\tBuffer               = %08lx\n", Buffer);
+
+    FileType = FatDecodeFileObject(FileObject, &Vcb, &Fcb, &Ccb);
+
+    DPRINT1("Vcb %p, Fcb %p, Ccb %p, open type %d\n", Vcb, Fcb, Ccb, FileType);
+
+    // TODO: Acquire FCB locks
+
+    switch (InfoClass)
+    {
+    case FileStandardInformation:
+        FatiQueryStandardInformation(IrpContext, Fcb, FileObject, Buffer, &Length);
+        break;
+    case FileInternalInformation:
+        FatiQueryInternalInformation(IrpContext, Fcb, FileObject, Buffer, &Length);
+        break;
+    default:
+        DPRINT1("Unimplemented information class %d requested\n", InfoClass);
+        Status = STATUS_INVALID_PARAMETER;
+    }
+
+    /* Check for buffer overflow */
+    if (Length < 0)
+    {
+        Status = STATUS_BUFFER_OVERFLOW;
+        Length = 0;
+    }
+
+    /* Set IoStatus.Information to amount of filled bytes */
+    Irp->IoStatus.Information = IrpSp->Parameters.QueryFile.Length - Length;
+
+    // TODO: Release FCB locks
+
+    /* Complete request and return status */
+    FatCompleteRequest(IrpContext, Irp, Status);
+    return Status;
+}
+
 NTSTATUS
 NTAPI
 FatQueryInformation(PDEVICE_OBJECT DeviceObject, PIRP Irp)
 {
-    DPRINT1("FatQueryInformation()\n");
-    return STATUS_NOT_IMPLEMENTED;
+    NTSTATUS Status;
+    BOOLEAN TopLevel, CanWait;
+    PFAT_IRP_CONTEXT IrpContext;
+
+    CanWait = TRUE;
+    TopLevel = FALSE;
+    Status = STATUS_INVALID_DEVICE_REQUEST;
+
+    /* Get CanWait flag */
+    if (IoGetCurrentIrpStackLocation(Irp)->FileObject != NULL)
+        CanWait = IoIsOperationSynchronous(Irp);
+
+    /* Enter FsRtl critical region */
+    FsRtlEnterFileSystem();
+
+    /* Set Top Level IRP if not set */
+    if (IoGetTopLevelIrp() == NULL)
+    {
+        IoSetTopLevelIrp(Irp);
+        TopLevel = TRUE;
+    }
+
+    /* Build an irp context */
+    IrpContext = FatBuildIrpContext(Irp, CanWait);
+
+    /* Perform the actual read */
+    Status = FatiQueryInformation(IrpContext, Irp);
+
+    /* Restore top level Irp */
+    if (TopLevel) IoSetTopLevelIrp(NULL);
+
+    /* Leave FsRtl critical region */
+    FsRtlExitFileSystem();
+
+    return Status;
 }
 
 NTSTATUS