On 08/26/09 14:33, Dean Roehrich wrote: > On Wed, Aug 26, 2009 at 09:55:20AM -0600, Tim Haley wrote: >> The offline attribute (XAT_OFFLINE) will be added to the read- >> write system attributes view defined in PSARC/2007/315 and will be >> generally available to file systems and applications to indicate >> the offline/online status of objects: boolean value of true >> indicates the object is offline. In order to set or clear the >> offline attribute the consumer must have the ACE_WRITE_ATTRIBUTES >> permission or the PRIV_FILE_OWNER privilege. In the kernel, it >> will be accessible via VOP_GETATTR() and VOP_SETATTR(). In user >> space, it will be accessible via chmod(1), ls(1) and fgetattr(3C). >> No changes are required to the VOP or fgetattr(3C) function >> prototypes. > > An HSM does not want the file's owner to twiddle this status. That status > should be controlled by the HSM.
The file system can return EACCES or EPERM if it doesn't want the attribute changed via fsetattr(3C). I didn't want to preclude user space applications from being able to manipulate this attribute on regular (non-HSM) file systems. As I mentioned, a virus scanner could be configured to mark the file as offline while it is performing a scan-on- open. Alan > I agree that anyone ought to be able to query the status. Joe User's file > browser should be able to see it and make smart decisions, such as not trying > to read a known-offline file as part of its effort to determine what kind of > icon to display. > > > Dean
