On Thu, Jul 03, 2014 at 04:14:08PM +0200, Matthias Schniedermeyer wrote: > On 03.07.2014 20:07, Jeff Liu wrote: > > Hi, > > > > On 07/03/2014 07:29 PM, Matthias Schniedermeyer wrote: > > > Hi > > > > > > > > > Is there a particular reason that the label of a mounted XFS fileystem > > > can't be changed? > > > > Maybe since we have no user request for this function? :) Most likely. It's currently done by xfs_db, which is an offline tool. > > > The man-page of xfs_admin gives a blanket "Devices that are mounted > > > cannot be modified" but no explanation for why that is. > > > > > > In my case it's the label of the root-filesystem i want to change. So to > > > change it i would have to boot the computer with some kind of live or > > > rescure-system. Or i would need to temporarily connect the device to > > > another computer, both aren't really nice hoops to jump through just to > > > change a few characters. > > > > > > The only thing i can compare this to is ext2 and with ext2 (/boot > > > partition, so it really is ext2) i can change the label to my hearts > > > content, even the device is mounted. > > > > > > For my case i could live with it if i could remount the filesystem RO, > > > change the label and then having to reboot the machine, still nicer than > > > the other 2 options. > > > > Btrfs support set/change label on a mounted file system via ioctl(2), maybe we > > can implement it if that sounds useful to our users. > > I would vote for that, i've run into this particular brickwall several > times over the years. There's a bunch of things I'd like to make online modifiable that currently can only be done offline by xfs_db and other tools. I'll add this to the list, and hopefully when I get a little time I'll do something about it... Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
