Hi, I was trying to implement .tmpfile for overlayfs inode_operations to support O_TMPFILE. Docker with aufs supports it, but this is deprecated and removed from current docker. I now have a work-around in my code (create tmpfile+unlink), but I thought it might be a good idea to have tmpfile support in overlayfs. I was trying to do it on my own, but I have some headaches to what is necessary to achieve the goal. From my understanding, I have to find the dentry for the upper dir (or workdir) and call vfs_tmpdir() for this, but I am running from oops to oops. Is there some hint what I have to do to achieve the goal? Best regards, Georg
