Exemplo n.º 1
0
        /// <summary>
        /// Windows will flush all cached data to the volume before locking it.
        /// Note: we can only lock a dynamic volume if the disk is online and the volume is operational.
        /// </summary>
        /// <returns>True if a new lock has been obtained</returns>
        public static bool ExclusiveLock(Guid windowsVolumeGuid, FileAccess fileAccess)
        {
            bool newAllocation;
            // Windows Vista / 7: Valid handle cannot be obtained for a dynamic volume using ShareMode.ReadWrite.
            // The FSCTL_LOCK_VOLUME documentation demands ShareMode.ReadWrite, but ShareMode.None or ShareMode.Write will work too.
            SafeFileHandle handle = VolumeHandlePool.ObtainHandle(windowsVolumeGuid, fileAccess, ShareMode.None, out newAllocation);

            if (newAllocation)
            {
                if (!handle.IsInvalid)
                {
                    bool success = VolumeControl.LockVolume(handle);
                    if (!success)
                    {
                        VolumeHandlePool.ReleaseHandle(windowsVolumeGuid);
                    }
                    return(success);
                }
                else
                {
                    VolumeHandlePool.ReleaseHandle(windowsVolumeGuid);
                    return(false);
                }
            }
            else
            {
                return(false);
            }
        }
Exemplo n.º 2
0
        /// <summary>
        /// Note that the volume will be remounted again on first access.
        /// </summary>
        public static bool DismountVolume(Guid windowsVolumeGuid)
        {
            bool           releaseHandle;
            SafeFileHandle handle  = VolumeHandlePool.ObtainHandle(windowsVolumeGuid, FileAccess.ReadWrite, ShareMode.ReadWrite, out releaseHandle);
            bool           success = false;

            if (!handle.IsInvalid)
            {
                success = VolumeControl.DismountVolume(handle);
            }

            if (releaseHandle) // new allocation
            {
                VolumeHandlePool.ReleaseHandle(windowsVolumeGuid);
            }
            return(success);
        }
Exemplo n.º 3
0
        /// <summary>
        /// Volume should be locked at this point for this call to have any effect
        /// </summary>
        /// <returns></returns>
        public bool AllowExtendedIO()
        {
            bool           releaseHandle;
            SafeFileHandle handle = VolumeHandlePool.ObtainHandle(m_volumeGuid, FileAccess.ReadWrite, ShareMode.None, out releaseHandle);

            if (!handle.IsInvalid)
            {
                bool result = VolumeControl.AllowExtendedIO(handle);
                if (releaseHandle)
                {
                    VolumeHandlePool.ReleaseHandle(m_volumeGuid);
                }
                return(result);
            }
            else
            {
                // we always release invalid handle
                VolumeHandlePool.ReleaseHandle(m_volumeGuid);
                return(false);
            }
        }
Exemplo n.º 4
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 public static List <string> GetMountPoints(Guid windowsVolumeGuid)
 {
     return(VolumeControl.GetVolumeMountPoints(windowsVolumeGuid));
 }
Exemplo n.º 5
0
 /// <summary>
 /// If Windows Automount is turned off, then partitions on new disks are not mounted. (but can be locked).
 /// Failed dynamic volumes are not mounted as well. (and can't be locked).
 /// Note: A volume can have 0 mount points and still be mounted and access by Windows.
 /// Note: The NTFS file system treats a locked volume as a dismounted volume.
 /// </summary>
 public static bool IsMounted(Guid windowsVolumeGuid)
 {
     return(VolumeControl.IsVolumeMounted(windowsVolumeGuid));
 }