On Fri October 14 2011, sf...@users.sourceforge.net wrote: > > Ken Trumbo: > > Yes, I know it sounds a bit strange at first. For example, the user can > > modify a file and test the change (say to a file in /etc) and if they don't > > like the change deleting just reverts back to the previous version. >
Since your application (the user above) can only see/modify /aufs/fileA (from an earlier post, snipped away from this one) - Why don't you just add a "restore" function to your application that is an alias for: rm /aufs/.wh.fileA ? Consider a variation of your above example - user examines the directory /etc (actually seeing /aufs/etc which is showing /ro/etc at this point in the game) - user decides that file should not exist for some reason and "removes" it. How do you plan to handle that without the "whiteout" function? Mike > Generally I'd suggest to detach /rw from aufs for such case. > > > > I can investigate FUSE but I think aufs is very close to what I need. I am > > wondering if it is easy to patch aufs to not create the whiteout file. Or, > > can I put the whiteout file into some 'nullfs'. > > It is easy to stop creating whiteout. > If you really want, then take a look at fs/aufs/i_op_del.c. > - au_wr_dir_need_wh() decides whether a new whiteout is necessary or > not. > - lock_hdir_create_wh() calls fs/aufs/whout.c:au_wh_create() to create > the whiteout. > Of course fs/aufs/i_op_del.c:aufs_unlink() is the body of unlink(2). > > > J. R. Okajima > > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure contains a > definitive record of customers, application performance, security > threats, fraudulent activity and more. Splunk takes this data and makes > sense of it. Business sense. IT sense. Common sense. > http://p.sf.net/sfu/splunk-d2d-oct > > ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2d-oct
