Wait AC Power online before to perform the actions.

btrfs-balance.sh

@@ -14,6 +14,10 @@ if [ -f /etc/default/btrfsmaintenance ] ; then
     . /etc/default/btrfsmaintenance
 fi
 
+if [ "$BTRFS_BALANCE_WAIT_AC_POWER" = "true" ]; then
+	wait_ac_power $BTRFS_AC_POWER_TIMEOUT "$BTRFS_AC_POWER_DEVICE"
+fi
+
 LOGIDENTIFIER='btrfs-balance'
 . $(dirname $(realpath $0))/btrfsmaintenance-functions
 

btrfs-defrag.sh

@@ -14,6 +14,10 @@ if [ -f /etc/default/btrfsmaintenance ] ; then
     . /etc/default/btrfsmaintenance
 fi
 
+if [ "$BTRFS_DEFRAG_WAIT_AC_POWER" = "true" ]; then
+	wait_ac_power $BTRFS_AC_POWER_TIMEOUT "$BTRFS_AC_POWER_DEVICE"
+fi
+
 LOGIDENTIFIER='btrfs-defrag'
 
 {

btrfs-scrub.sh

@@ -14,6 +14,10 @@ if [ -f /etc/default/btrfsmaintenance ] ; then
     . /etc/default/btrfsmaintenance
 fi
 
+if [ "$BTRFS_SCRUB_WAIT_AC_POWER" = "true" ]; then
+	wait_ac_power $BTRFS_AC_POWER_TIMEOUT "$BTRFS_AC_POWER_DEVICE"
+fi
+
 LOGIDENTIFIER='btrfs-scrub'
 . $(dirname $(realpath $0))/btrfsmaintenance-functions
 

btrfs-trim.sh

@@ -14,6 +14,10 @@ if [ -f /etc/default/btrfsmaintenance ] ; then
     . /etc/default/btrfsmaintenance
 fi
 
+if [ "$BTRFS_TRIM__WAIT_AC_POWER" = "true" ]; then
+	wait_ac_power $BTRFS_AC_POWER_TIMEOUT "$BTRFS_AC_POWER_DEVICE"
+fi
+
 LOGIDENTIFIER='btrfs-trim'
 . $(dirname $(realpath $0))/btrfsmaintenance-functions
 

btrfsmaintenance-functions

@@ -76,3 +76,29 @@ is_btrfs() {
 	[ "$FS" == "btrfs" ] && return 0
 	return 1
 }
+
+# function: wait_ac_power
+# parameter: {timeout} {AC power online device}
+#
+# wait until ac power goes online
+wait_ac_power() {
+	local timecount=0
+	local timeout=0
+	local ac_power_device=/sys/class/power_supply/AC/online
+
+	[ -n "$1" ] && [[ $1 =~ ^[0-9]+$ ]] && timeout=$1
+	[ -n "$2" ]&& ac_power_device="$2"
+
+	echo timeout $timeout ac_power_device $ac_power_device
+
+	if [ -f "${ac_power_device}" ]; then
+		while [ "$(cat ${ac_power_device})" -ne 1 ]; do
+			# AC is not online
+			[ $timeout -gt 0 ] && [ $timecount -ge $timeout ] && return 1
+			sleep 1s
+			timecount=$((timecount+1))
+		done
+		return 0
+	fi
+	return 0
+}

sysconfig.btrfsmaintenance

@@ -6,6 +6,20 @@
 # 'btrfs-scrub' etc.
 BTRFS_LOG_OUTPUT="stdout"
 
+## Path:        System/File systems/btrfs
+## Type:        number
+## Default:     3600
+#
+# Second to wait the AC Power before to continue anyway
+BTRFS_AC_POWER_TIMEOUT=3600
+
+## Path:        System/File systems/btrfs
+## Type:        string
+## Default:     "/sys/class/power_supply/AC/online"
+#
+# Path of AC status flag
+BTRFS_AC_POWER_DEVICE="/sys/class/power_supply/AC/online"
+
 ## Path:        System/File systems/btrfs
 ## Type:        string
 ## Default:     ""
@@ -31,6 +45,14 @@ BTRFS_DEFRAG_PERIOD="none"
 # Minimal file size to consider for defragmentation
 BTRFS_DEFRAG_MIN_SIZE="+1M"
 
+## Path:        System/File systems/btrfs
+## Type:        boolean
+## Default:     "false"
+#
+# Wait AC Power before defrag
+BTRFS_DEFRAG_WAIT_AC_POWER="false"
+
+
 ## Path:        System/File systems/btrfs
 ## Type:        string
 ## Default:     "/"
@@ -72,6 +94,13 @@ BTRFS_BALANCE_DUSAGE="1 5 10 20 30 40 50"
 # this will increase IO load on the system.
 BTRFS_BALANCE_MUSAGE="1 5 10 20 30"
 
+## Path:        System/File systems/btrfs
+## Type:        boolean
+## Default:     "false"
+#
+# Wait AC Power before balance
+BTRFS_BALANCE_WAIT_AC_POWER="false"
+
 ## Path:        System/File systems/btrfs
 ## Type:        string
 ## Default:     "/"
@@ -104,6 +133,13 @@ BTRFS_SCRUB_PRIORITY="idle"
 # Do read-only scrub and don't try to repair anything.
 BTRFS_SCRUB_READ_ONLY="false"
 
+## Path:        System/File systems/btrfs
+## Type:        boolean
+## Default:     "false"
+#
+# Wait AC Power before scrub
+BTRFS_SCRUB_WAIT_AC_POWER="false"
+
 ## Path:           System/File systems/btrfs
 ## Description:    Configuration for periodic fstrim
 ## Type:           string(none,daily,weekly,monthly)
@@ -124,3 +160,10 @@ BTRFS_TRIM_PERIOD="none"
 # (Colon separated paths)
 # The special word/mountpoint "auto" will evaluate all mounted btrfs filesystems at runtime
 BTRFS_TRIM_MOUNTPOINTS="/"
+
+## Path:        System/File systems/btrfs
+## Type:        boolean
+## Default:     "false"
+#
+# Wait AC Power before trim
+BTRFS_TRIM_WAIT_AC_POWER="false"