On Mon, May 08, 2017 at 12:17:53AM +0200, Jann Horn wrote: > On Sun, May 7, 2017 at 5:58 PM, Darrick J. Wong <darrick.wong@xxxxxxxxxx> wrote: > > Document the new GETFSMAP ioctl that returns the physical layout of a > > (disk-based) filesystem. > [...] > > +.B EPERM > > +This query is not allowed. > > Please document the circumstances under which a query is allowed. For the two current implementations, queries are always allowed. (The doc could be more explicit about this decision being left to the implementation.) > Also: From a quick glance at the XFS implementation, I don't see any > privilege checks. Am I missing something, or does this API permit an > unprivileged user to determine the number of physical blocks allocated > for any inode, even for inodes the user can't ordinarily see in any > way? Correct. --D > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html
