* mount shows incorrect subvol when backed by bind mount
@ 2018-08-10 4:19 Chris Murphy
0 siblings, 0 replies; only message in thread
From: Chris Murphy @ 2018-08-10 4:19 UTC (permalink / raw)
To: Btrfs BTRFS
I've got another example of bind mounts resulting in confusing
(incorrect) information in the mount command with Btrfs. In this case,
it's Docker using bind mounts.
Full raw version (expires in 7 days)
https://paste.fedoraproject.org/paste/r8tr-3nuvoycwxf0bPUrmA/raw
Relevant portion:
mount shows:
/dev/mmcblk0p3 on /var/lib/docker/containers type btrfs
(rw,noatime,seclabel,compress-force=zstd,ssd,space_cache=v2,subvolid=265,subvol=/root/var/lib/docker/containers)
/dev/mmcblk0p3 on /var/lib/docker/btrfs type btrfs
(rw,noatime,seclabel,compress-force=zstd,ssd,space_cache=v2,subvolid=265,subvol=/root/var/lib/docker/btrfs)
And from the detail fpaste, you can see there is no such subvolume
docker/btrfs or docker/containers - and subvolid=265 is actually for
rootfs.
Anyway, mortals will be confused by this behavior.
--
Chris Murphy
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