Changeset 63991 in vbox for trunk

Timestamp:

Sep 25, 2016 5:30:01 PM (8 years ago)

Author:

vboxsync

Message:

PDMIMEDIAEX: Another addendum, make it possible to query a residual byte count which will be used for the SCSI layer later on

Location:

trunk

Files:

• include/VBox/vmm/pdmstorageifs.h (modified) (2 diffs)
• src/VBox/Devices/Storage/DrvVD.cpp (modified) (2 diffs)

trunk/include/VBox/vmm/pdmstorageifs.h

@@ -786 +786 @@
 
     /**
+     * Queries the residual amount of data not transfered when the request completed.
+     *
+     * @returns VBox status code.
+     * @retval  VERR_PDM_MEDIAEX_IOREQ_INVALID_STATE has not completed yet.
+     * @param   pInterface      Pointer to the interface structure containing the called function pointer.
+     * @param   hIoReq          The I/O request.
+     * @param   pcbResidual     Where to store the amount of resdiual data in bytes.
+     * @thread  Any thread.
+     */
+    DECLR3CALLBACKMEMBER(int, pfnIoReqQueryResidual, (PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQ hIoReq, size_t *pcbResidual));
+
+    /**
      * Cancels all I/O active requests.
      *
@@ -970 +982 @@
 } PDMIMEDIAEX;
 /** PDMIMEDIAEX interface ID. */
-#define PDMIMEDIAEX_IID                      "ae47c9a9-fa43-4b07-8f9a-b45bcc3fb8e4"
+#define PDMIMEDIAEX_IID                      "c36b27b0-6570-4e9c-b1ed-d6f4b87129a4"
 
 /**

trunk/src/VBox/Devices/Storage/DrvVD.cpp

@@ -3522 +3522 @@
 
 /**
+ * @interface_method_impl{PDMIMEDIAEX,pfnIoReqQueryResidual}
+ */
+static DECLCALLBACK(int) drvvdIoReqQueryResidual(PPDMIMEDIAEX pInterface, PDMMEDIAEXIOREQ hIoReq, size_t *pcbResidual)
+{
+    RT_NOREF1(pInterface);
+
+    PPDMMEDIAEXIOREQINT pIoReq = hIoReq;
+
+    if (pIoReq->enmState != VDIOREQSTATE_COMPLETED)
+        return VERR_PDM_MEDIAEX_IOREQ_INVALID_STATE;
+
+    if (   pIoReq->enmType != PDMMEDIAEXIOREQTYPE_READ
+        && pIoReq->enmType != PDMMEDIAEXIOREQTYPE_WRITE)
+        return VERR_PDM_MEDIAEX_IOREQ_INVALID_STATE;
+
+    *pcbResidual = 0; /* No data left to transfer always. */
+    return VINF_SUCCESS;
+}
+
+/**
  * @interface_method_impl{PDMIMEDIAEX,pfnIoReqCancelAll}
  */
@@ -4501 +4521 @@
     pThis->IMediaEx.pfnIoReqAlloc               = drvvdIoReqAlloc;
     pThis->IMediaEx.pfnIoReqFree                = drvvdIoReqFree;
+    pThis->IMediaEx.pfnIoReqQueryResidual       = drvvdIoReqQueryResidual;
     pThis->IMediaEx.pfnIoReqCancelAll           = drvvdIoReqCancelAll;
     pThis->IMediaEx.pfnIoReqCancel              = drvvdIoReqCancel;