Re: Odd snapshot subvolume

[Nicholas D Steeves <sten@debian.org>]

[-- Attachment #1: Type: text/plain, Size: 1414 bytes --]

Hi Brian,

"Brian J. Murrell" <brian@interlinx.bc.ca> writes:

> On my Fedora system I have the following:
>
> $ sudo btrfs subvolume show /
> fedora_root
> 	Name: 			fedora_root
> 	UUID: 			c08a988c-ddd5-164e-b01e-51ac26bf018b
> 	Parent UUID: 		-
> 	Received UUID: 		-
> 	Creation time: 		2021-08-10 18:30:03 -0400
> 	Subvolume ID: 		258
> 	Generation: 		5029586
> 	Gen at creation: 	10
> 	Parent ID: 		5
> 	Top level ID: 		5
> 	Flags: 			-
> 	Send transid: 		0
> 	Send time: 		2021-08-10 18:30:03 -0400
> 	Receive transid: 	0
> 	Receive time: 		-
> 	Snapshot(s):
> 				fedora_root/previous-releases/f38_root
> 				fedora_root/previous-releases/f39_root
> 				fedora_root/previous-releases/f40_root.old
> 				fedora_root/previous-releases/f41_root
> 				previous-releases/f33_root
> 	Quota group:		n/a
[snip]
> How can I access that "previous-releases/f33_root" snapshot or even
> just remove it?

  # mkdir -p /btrfs-admin
  # mount -o subvolid=5 /dev/disk/by-uuid/c08a988c-ddd5-164e-b01e-51ac26bf018b /btrfs-admin
  # cd /btrfs-admin
  # mv previous-releases/f33_root fedora_root/previous_releases/f33_root
  OR
  # btrfs subvolume delete /btrfs-admin/previous-releases/f33_root

To anyone else reading this:

Are there any reasons why distributions shouldn't set this up by
default?  What are the arguments against exposing the full structure in
/dev or in /sys (with permissions like 700)?

Regards,
Nicholas

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 857 bytes --]