Detect BTRFS filesystem

debian/chroot.mount

@@ -15,6 +15,14 @@ new_hostname=""
 vgname=$(vgdisplay --short | tail -n 1 | sed 's/.*"\(.*\)" .*/\1/')
 ## If the script should create extra volume (eg. backup, virt, Proxmox,…)
 manage_extra_lv=0
+## Is BTRFS {{{
+root_fs_type=$(lsblk -f /dev/mapper/"${vgname}"-root | awk '/root/ { print $2 }')
+if [ "${root_fs_type}" = "btrfs" ]; then
+	manage_btrfs=0
+else
+	manage_btrfs=1
+fi
+## }}}
 ## Colors definition {{{
 BLACK='\033[49;30m'
 BLACKB='\033[49;90m'
@@ -35,6 +43,10 @@ RESET='\033[0m'
 mkdir -p -- /target
 mountpoint -q /target            || mount -- /dev/mapper/"${vgname}"-root /target
 
+##
+if [ "${manage_btrfs}" -eq 0 ]; then
+	printf '%b\n' "The root system is in ${GREEN}BTRFS${RESET}, no extra mount is required."
+else
 	### boot - grub
 	mountpoint -q /target/boot       || mount -- ${hdd}1 /target/boot
 
@@ -57,6 +69,7 @@ if [ "${manage_extra_lv}" -eq 0 ]; then
 		### Extra vz LV
 		mountpoint -q /target/var/lib/vz || mount -- /dev/mapper/"${vgname}"-vz /target/var/lib/vz
 	fi
+fi
 
 ### Swap
 swapon -- /dev/mapper/"${vgname}"-swap