TARUISI Hiroaki wrote:
> For now, subvolumes and snapshots look like just directories.
> If you want to distinguish them, there's only an unusual way,
> that is, analyzing with btrfs-debug-tree.
>
> I posted patches for listing snapshots/subvolumes two months ago,
> and Josef Bacik posted its bugfix patch. This feature may be
> delivered in sooner or later.
> If you want to try it now, check these URLs.
> http://patchwork.kernel.org/patch/60923/raw/
> http://patchwork.kernel.org/patch/60920/raw/
> http://patchwork.kernel.org/patch/67332/raw/
>
Thanks for pointing me all the needed patched, the btrfsctl -l is
working for me fine.
> Patches and requests are welcome.
>
Currently btrfsctl -l show only which directories are
snapshots/subvolumes, it would be nice if it would also show
a hierarchy of snapshots i.e. from which subvolume/snapshot a specific
snapshot was taken from.
For example:
/ # cd /.btrfs
/.btrfs # btrfsctl -l /.btrfs
Base path = /.btrfs/
No. Tree ID Subvolume Relative Path
1 275 rootfs-old/
2 277 rootfs/
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/.btrfs # btrfsctl -S subvol0 .
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/.btrfs # btrfsctl -l /.btrfs/
Base path = /.btrfs/
No. Tree ID Subvolume Relative Path
1 275 rootfs-old/
2 277 rootfs/
3 279 subvol0/
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/.btrfs # btrfsctl -s subvol0-snap subvol0
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/.btrfs # btrfsctl -s subvol0/subvol1-snap subvol0
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/.btrfs # btrfsctl -s subvol1-snap-snap subvol0/subvol1-snap
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/.btrfs # btrfsctl -l /.btrfs/
Base path = /.btrfs/
No. Tree ID Subvolume Relative Path
1 275 rootfs-old/
2 277 rootfs/
3 279 subvol0/
4 281 subvol0/subvol1-snap/
5 280 subvol0-snap/
6 282 subvol1-snap-snap/
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/ .btrfs #
It would be nice if it would possible to show the youngest snapshot
ancestor - something like this:
/.btrfs # btrfsctl -l /.btrfs/
Base path = /.btrfs/
No. Tree ID Subvolume Relative Path Snapshot Ancestor
1 275 rootfs-old/ none
2 277 rootfs/
rootfs-old/
3 279 subvol0/ none
4 281 subvol0/subvol1-snap/ subvol0/
5 280 subvol0-snap/ subvol0/
6 282 subvol1-snap-snap/
subvol0/subvol1-snap/
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/.btrfs # btrfsctl -D subvol1-snap subvol0
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/.btrfs # btrfsctl -l .
Base path = /.btrfs/
No. Tree ID Subvolume Relative Path Snapshot Ancestor
1 275 rootfs-old/ none
2 277 rootfs/
rootfs-old/
3 279 subvol0/ none
4 280 subvol0-snap/ subvol0/
5 282 subvol1-snap-snap/ subvol0/
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/.btrfs # btrfsctl -D subvol0 .
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/.btrfs # btrfsctl -l .
Base path = /.btrfs/
No. Tree ID Subvolume Relative Path Snapshot Origin
1 275 rootfs-old/ none
2 277 rootfs/
rootfs-old/
3 280 subvol0-snap/ none
4 282 subvol1-snap-snap/ none
operation complete
Btrfs v0.19-4-gab8fb4c-dirty
/.btrfs #
Thanks
Alex
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