[pschweitzer] 74047: [FASTFAT] When un/locking a volume, also handle VPB state

Author: pschweitzer
Date: Sat Mar  4 11:34:13 2017
New Revision: 74047

URL: http://svn.reactos.org/svn/reactos?rev=74047&view=rev
Log:
[FASTFAT]
When un/locking a volume, also handle VPB state

Modified:
    trunk/reactos/drivers/filesystems/fastfat/fsctl.c

Modified: trunk/reactos/drivers/filesystems/fastfat/fsctl.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfat...
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat/fsctl.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat/fsctl.c	[iso-8859-1] Sat Mar  4 11:34:13 2017
@@ -1058,12 +1058,14 @@
     PFILE_OBJECT FileObject;
     PDEVICE_EXTENSION DeviceExt;
     PVFATFCB Fcb;
+    PVPB Vpb;

DPRINT("VfatLockOrUnlockVolume(%p, %d)\n", IrpContext, Lock);

DeviceExt = IrpContext->DeviceExt;
     FileObject = IrpContext->FileObject;
     Fcb = FileObject->FsContext;
+    Vpb = DeviceExt->FATFileObject->Vpb;

/* Only allow locking with the volume open */
     if (!BooleanFlagOn(Fcb->Flags, FCB_IS_VOLUME))
@@ -1078,6 +1080,13 @@
         return STATUS_ACCESS_DENIED;
     }

+    /* Bail out if it's already in the demanded state */
+    if ((BooleanFlagOn(Vpb->Flags, VPB_LOCKED) && Lock) ||
+        (!BooleanFlagOn(Vpb->Flags, VPB_LOCKED) && !Lock))
+    {
+        return STATUS_ACCESS_DENIED;
+    }
+
     /* Deny locking if we're not alone */
     if (Lock && DeviceExt->OpenHandleCount != 1)
     {
@@ -1088,10 +1097,12 @@
     if (Lock)
     {
         DeviceExt->Flags |= VCB_VOLUME_LOCKED;
+        Vpb->Flags |= VPB_LOCKED;
     }
     else
     {
         DeviceExt->Flags &= ~VCB_VOLUME_LOCKED;
+        Vpb->Flags &= ~VPB_LOCKED;
     }

return STATUS_SUCCESS;