Messages in this thread | | | Date | Thu, 24 Apr 2014 03:39:25 +0100 | From | Al Viro <> | Subject | Re: How do I make a clean mount namespace? |
| |
On Tue, Apr 22, 2014 at 03:12:11PM -0700, Andy Lutomirski wrote: > I want to set up a little container. So I unshare the mount namespace > and mount something somewhere (say /mnt) that I want to be my new > root. Now what? > > pivot_root("/mnt", "/mnt/garbage") seems to frequently return -EBUSY.
RTFM. Literally - man 2 pivot_root and look for the only place where it mentions EBUSY.
If you get that error, check what you've got in /proc/mounts (in the namespace your process is in, obviously) just before the syscall. With these arguments you really want /mnt to be a mountpoint. If your new root really lives on the same fs as the old one, just do mount --bind /mnt /mnt before any other mounts.
| |