This patch modifies the default output for SOURCE column. All btrfs
subvolume mountpoints and all bind-mount (where source is not root of
FS) will be printed as:
SOURCE TARGET
/dev/sda1[/aaa] /mnt/test
where /aaa is subvolume name or fs root for bind mounts, it means:
# mount -t btrfs /dev/sda1 /mnt/test -o subvol=aaa
or:
# mount --bind /aaa /mnt/test
The info about fs-root is 4th column in /proc/self/mountinfo.
Signed-off-by: Karel Zak <kzak@redhat.com>
Davidlohr Bueso
Karel Zak
Benno Schulenberg