f22 fedup with btrfs snapshot?

[Neal Becker]

Neal Becker wrote:

> I have f21 installed on btrfs.  I wonder what's a good procedure to use
> fedup along with btrfs snapshot, so that I can backout to f21 if I don't
> like it?
> 
> Right now I have:
> 
>  sudo btrfs sub list /
> ID 257 gen 67442 top level 5 path root
> ID 318 gen 67442 top level 5 path home
> 
> -- /etc/fstab
> UUID=93c586fa-6d86-4148-a528-e61e644db0c8 /                       btrfs
> subvol=root     0 0
> UUID=93c586fa-6d86-4148-a528-e61e644db0c8 /home                   btrfs
> subvol=home     0 0
> UUID=e907e423-4282-4ca9-a873-b544d17d34b9 /boot                   ext4
> defaults        1 2
> UUID=b0cde31d-3694-4b98-ad90-e28c7d35a869 swap                    swap
> defaults        0 0
> 
> 

I think this may be all I need:

sudo mount /dev/sda3 /mnt
[nbecker at nbecker2 ~]$ ls -l /mnt
total 0
drwxr-xr-x. 1 root root  14 Jun  1 18:46 home
dr-xr-xr-x. 1 root root 172 Jun  2 09:39 root

[nbecker at nbecker2 ~]$ sudo btrfs sub snap /mnt/root /mnt/root-f21
Create a snapshot of '/mnt/root' in '/mnt/root-f21'
[nbecker at nbecker2 ~]$ ls -l /mnt
total 0
drwxr-xr-x. 1 root root  14 Jun  1 18:46 home
dr-xr-xr-x. 1 root root 172 Jun  2 09:39 root
dr-xr-xr-x. 1 root root 172 Jun  2 09:39 root-f21

So now I have a snap of f21 root in in root-f21 subvol, and I should be able 
to rollback by editing grub.cfg and /etc/fstab to point to root-f21 subvol 
instead of root subvol, correct?
-- 
Those who fail to understand recursion are doomed to repeat it