Hi, I am trying to enhance GParted (http://www.gparted.org/) to better support btrfs, specifically multi-device ones. GParted displays the busy status (mounted or not) and the mount point of each partition. For a single device file system this is easy. Entry in /proc/mounts for the partition identifies it's mounted and provides the mount point. In the general case for btrfs I don't know how to get from device name containing a btrfs volume to knowing if it's mounted and where? btrfs filesystem show can identify the devices in a btrfs, but if the mounting device was removed from the file system this linkage is broken. # mkfs.btrfs /dev/sdb2 /dev/sdb3 /dev/sdb4 # mount /dev/sdb2 /mnt/1 # btrfs device delete /dev/sdb2 /mnt/1 So /dev/sdb2 is no longer part of the file system, but it's still mounted using it. # grep btrfs /proc/mounts /dev/sdb2 /mnt/1 btrfs rw,seclabel,relatime,ssd,space_cache 0 0 # btrfs filesystem show /dev/sdb3 Label: none uuid: d1e98472-e562-466c-8fa4-ddcaee757c20 Total devices 2 FS bytes used 156.00KB devid 3 size 2.00GB used 961.56MB path /dev/sdb4 devid 2 size 2.00GB used 552.00MB path /dev/sdb3 So in there a way to determine whether a specific partition containing a btrfs volume is mounted and on what mount point? Thanks, Mike -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
