On Tue, Aug 22, 2017 at 02:23:50PM +0200, Ulli Horlacher wrote: > How do I find the root filesystem of a subvolume? > Example: > > root@fex:~# df -T > Filesystem Type 1K-blocks Used Available Use% Mounted on > - - 1073740800 104244552 967773976 10% /local/.backup/home
I've never seen the "- -" output from df before. Is this a bind mount or something? > root@fex:~# btrfs subvolume show /local/.backup/home > /local/.backup/home > Name: home > uuid: f86a2db0-6a82-124f-9a71-1cd4c20fd6fb > Parent uuid: ba4d388f-44bf-7b46-b2b8-00e2a9a87181 > Creation time: 2017-08-10 22:19:15 > Object ID: 383 > Generation (Gen): 148 > Gen at creation: 148 > Parent: 5 > Top Level: 5 > Flags: readonly > Snapshot(s): > > > I know, the root filesystem is /local, but who can I show it by command? Probably in /proc/self/mountinfo -- that should give you the full set of applied mount options, plus the original source for the mount (which will be a block device for most filesystem mounts, a path for bind mounts, or something FS-specific for network filesystems). Hugo. -- Hugo Mills | And what rough beast, its hour come round at last / hugo@... carfax.org.uk | slouches towards Bethlehem, to be born? http://carfax.org.uk/ | PGP: E2AB1DE4 | W.B. Yeats, The Second Coming
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