Not sure if this helps ... the proc "mountinfo" of any pid seems to have
the relative path of the bind source.
# mount --bind /srv dir1
# mount --bind /mnt dir2
#
# mount | grep dasdc
/dev/dasdc1 on / type ext4
(rw,relatime,errors=remount-ro,data=ordered)
/dev/dasdc1 on /root/dir1 type ext4
(rw,relatime,errors=remount-ro,data=ordered)
/dev/dasdc1 on /root/dir2 type ext4
(rw,relatime,errors=remount-ro,data=ordered)
#
# cat /proc/$$/mountinfo | grep dasdc
23 0 94:9 / / rw,relatime shared:1 - ext4 /dev/dasdc1
rw,errors=remount-ro,data=ordered
558 23 94:9 /srv /root/dir1 rw,relatime shared:1 - ext4 /dev/dasdc1
rw,errors=remount-ro,data=ordered
596 23 94:9 /mnt /root/dir2 rw,relatime shared:1 - ext4 /dev/dasdc1
rw,errors=remount-ro,data=ordered
#
So checking the fourth column for a relative source of "/" may help
identify just the pure disk mounts, ex:
# cat /proc/1/mountinfo | awk '$4 == "/" {print $0}' | grep dasdc
23 0 94:9 / / rw,relatime shared:1 - ext4 /dev/dasdc1
rw,errors=remount-ro,data=ordered
#
- Mark Ver
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