08.07.2019 1:18, Ulli Horlacher пишет: > On Sun 2019-07-07 (12:12), Nikolay Borisov wrote: > > >> root@ubuntu-virtual:~# mount /dev/vdc /media/scratch/ >> >> root@ubuntu-virtual:~# btrfs subvol show /media/scratch/ >> / >> Name: <FS_TREE> >> UUID: 80633e8d-fa8a-4922-ac0c-b46d7b2e2d81 >> Parent UUID: - >> Received UUID: - >> Creation time: 2019-07-07 09:09:15 +0000 >> Subvolume ID: 5 >> Generation: 8 >> Gen at creation: 0 >> Parent ID: 0 >> Top level ID: 0 >> Flags: - >> Snapshot(s): >> snap1 >> snap-ro > > > root@fex:~# lsb_release -d > Description: Ubuntu 18.04.2 LTS > > root@fex:~# btrfs version > btrfs-progs v4.15.1 > > root@fex:~# mount|grep /local > /dev/sdd1 on /local type btrfs (rw,relatime,space_cache,user_subvol_rm_allowed,subvolid=5,subvol=/) > > root@fex:~# btrfs subvolume show /local > / > Name: <FS_TREE> > UUID: - > Parent UUID: - > Received UUID: - > Creation time: - > Subvolume ID: 5 > Generation: 1633457 > Gen at creation: 0 > Parent ID: 0 > Top level ID: 0 > Flags: - > > No UUID! > Neither here on different versions of openSUSE. Note that it also mistakenly displays subvolumes as snapshots (I assume, it simply compares NULL subvolume UUID with NULL parent UUID in this case). bor@leap423:~> sudo btrfs version btrfs-progs v4.5.3+20160729 bor@leap423:~> uname -a Linux leap423 4.4.180-102-default #1 SMP Mon Jun 17 13:11:23 UTC 2019 (7cfa20a) x86_64 x86_64 x86_64 GNU/Linux bor@leap423:~> sudo btrfs su sh /mnt /mnt is toplevel subvolume bor@leap423:~> bor@localhost:~> sudo btrfs version btrfs-progs v4.19.1 bor@localhost:~> uname -a Linux localhost 4.12.14-lp151.28.7-default #1 SMP Mon Jun 17 16:36:38 UTC 2019 (f8a1872) x86_64 x86_64 x86_64 GNU/Linux bor@localhost:~> sudo btrfs su sh /mnt / Name: <FS_TREE> UUID: - Parent UUID: - Received UUID: - Creation time: - Subvolume ID: 5 Generation: 338 Gen at creation: 0 Parent ID: 0 Top level ID: 0 Flags: - Snapshot(s): @ @/var @/usr/local @/tmp @/srv @/root @/opt @/home @/boot/grub2/x86_64-efi @/boot/grub2/i386-pc @/.snapshots @/.snapshots/1/snapshot bor@localhost:~> bor@10:~> sudo btrfs version btrfs-progs v5.1 bor@10:~> uname -a Linux 10.0.2.15 5.1.7-1-default #1 SMP Tue Jun 4 07:56:54 UTC 2019 (55f2451) x86_64 x86_64 x86_64 GNU/Linux bor@10:~> sudo btrfs su sh /mnt / Name: <FS_TREE> UUID: - Parent UUID: - Received UUID: - Creation time: - Subvolume ID: 5 Generation: 26638 Gen at creation: 0 Parent ID: 0 Top level ID: 0 Flags: - Snapshot(s): @ @/.snapshots @/boot/grub2/i386-pc @/boot/grub2/x86_64-efi @/home @/opt @/srv @/tmp @/usr/local @/var/cache @/var/crash @/var/lib/libvirt/images @/var/lib/machines @/var/lib/mailman @/var/lib/mariadb @/var/lib/mysql @/var/lib/named @/var/lib/pgsql @/var/log @/var/opt @/var/spool @/var/tmp bor@10:~>
