On Tue, Dec 17, 2019 at 4:37 AM Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote: > > On Thu, Nov 28, 2019 at 04:59:40PM +0100, Miklos Szeredi wrote: > > While this is a standard option as documented in mount(8), it is ignored by > > most filesystems. So reject, unless filesystem explicitly wants to handle > > it. > > > > The exception is unconverted filesystems, where it is unknown if the > > filesystem handles this or not. > > > > Any implementation, such as mount(8), that needs to parse this option > > without failing can simply ignore the return value from fsconfig(). > > Unless I'm missing something, that will mean that having it in /etc/fstab > for a converted filesystem (xfs, for example) will fail when booting > new kernel with existing /sbin/mount. Doesn't sound like a good idea... Nope, the mount(2) case is not changed (see second hunk). When mount(8) is converted to the new API, it can just handle such back compat issues (ignore error from fconfig()) in that case. Thanks, Miklos
