Changeset 38193 in vbox for trunk/src/VBox/Additions/WINNT

Timestamp:

Jul 27, 2011 9:34:56 AM (14 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

73157

Message:

Windows guest shared folders: implement SetFileAllocationInformation.

File:

• trunk/src/VBox/Additions/WINNT/SharedFolders/redirector/sys/fileinfo.c (modified) (2 diffs)

trunk/src/VBox/Additions/WINNT/SharedFolders/redirector/sys/fileinfo.c

@@ -1589 +1589 @@
     {
         PFILE_ALLOCATION_INFORMATION pAllocInfo = (PFILE_ALLOCATION_INFORMATION)pBuffer;
-
-        Log(("VBOXSF: VBoxMRxSetFileInformation: FileAllocationInformation: AllocSize = %RX64\n", pAllocInfo->AllocationSize.QuadPart));
-
-        /* Pretend success */
-        Status = STATUS_SUCCESS;
+        LARGE_INTEGER NewAllocationSize;
+
+        Log(("VBOXSF: VBoxMRxSetFileInformation: FileAllocationInformation: new AllocSize = %RX64, FileSize = %RX64\n",
+             pAllocInfo->AllocationSize.QuadPart, capFcb->Header.FileSize.QuadPart));
+
+        /* Check if the new allocation size changes the file size. */
+        if (pAllocInfo->AllocationSize.QuadPart > capFcb->Header.FileSize.QuadPart)
+        {
+            /* Ignore this request and return success. Shared folders do not distinguish between
+             * AllocationSize and FileSize.
+             */
+            Status = STATUS_SUCCESS;
+        }
+        else
+        {
+            /* Treat the request as a EndOfFile update. */
+            Status = VBoxMRxSetEndOfFile(RxContext, &pAllocInfo->AllocationSize, &NewAllocationSize);
+        }
+
         break;
     }
@@ -1602 +1616 @@
         LARGE_INTEGER NewAllocationSize;
 
-        Log(("VBOXSF: VBoxMRxSetFileInformation: FileEndOfFileInformation: FileSize = %RX64\n", capFcb->Header.AllocationSize.QuadPart));
-        if (pEndOfFileInfo->EndOfFile.QuadPart > capFcb->Header.AllocationSize.QuadPart)
+        Log(("VBOXSF: VBoxMRxSetFileInformation: FileEndOfFileInformation: new EndOfFile %RX64, FileSize = %RX64\n",
+             pEndOfFileInfo->EndOfFile.QuadPart, capFcb->Header.FileSize.QuadPart));
+        if (pEndOfFileInfo->EndOfFile.QuadPart > capFcb->Header.FileSize.QuadPart)
         {
             Status = VBoxMRxExtendFile(RxContext, &pEndOfFileInfo->EndOfFile, &NewAllocationSize);