3 files changed, 85 insertions, 0 deletions
diff --git a/modules.d/80lvmthinpool-monitor/module-setup.sh b/modules.d/80lvmthinpool-monitor/module-setup.sh
new file mode 100755
index 0000000..ca015bd
--- /dev/null
+++ b/modules.d/80lvmthinpool-monitor/module-setup.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# called by dracut
+check() {
+    # No point trying to support lvm if the binaries are missing
+    require_binaries lvm sort tr awk || return 1
+
+    return 255
+}
+
+# called by dracut
+depends() {
+    echo lvm
+    return 0
+}
+
+# called by dracut
+install() {
+    inst_multiple sort tr awk
+    inst_script "$moddir/start-thinpool-monitor.sh" "/bin/start-thinpool-monitor"
+
+    inst "$moddir/start-thinpool-monitor.service" "$systemdsystemunitdir/start-thinpool-monitor.service"
+    $SYSTEMCTL -q --root "$initdir" add-wants initrd.target start-thinpool-monitor.service
+}
diff --git a/modules.d/80lvmthinpool-monitor/start-thinpool-monitor.service b/modules.d/80lvmthinpool-monitor/start-thinpool-monitor.service
new file mode 100644
index 0000000..97f5f1f
--- /dev/null
+++ b/modules.d/80lvmthinpool-monitor/start-thinpool-monitor.service
@@ -0,0 +1,14 @@
+[Unit]
+Description=Lvm thinpool monitor service
+Before=initrd.target
+After=initrd-fs.target
+Conflicts=shutdown.target emergency.target
+
+[Service]
+Type=forking
+ExecStart=/bin/start-thinpool-monitor
+PIDFile=/run/thinpool-moni.pid
+StandardInput=null
+StandardOutput=journal+console
+StandardError=journal+console
+KillSignal=SIGHUP
diff --git a/modules.d/80lvmthinpool-monitor/start-thinpool-monitor.sh b/modules.d/80lvmthinpool-monitor/start-thinpool-monitor.sh
new file mode 100755
index 0000000..10f4a4b
--- /dev/null
+++ b/modules.d/80lvmthinpool-monitor/start-thinpool-monitor.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+
+type getarg > /dev/null 2>&1 || . /lib/dracut-lib.sh
+
+LVS=$(getargs rd.lvm.lv -d rd_LVM_LV=)
+
+is_lvm2_thinp_device() {
+    _device_path=$1
+    _lvm2_thin_device=$(lvm lvs -S 'lv_layout=sparse && lv_layout=thin' \
+        --nosuffix --noheadings -o vg_name,lv_name "$_device_path" 2> /dev/null)
+
+    [ -n "$_lvm2_thin_device" ] && return $?
+}
+
+for LV in $LVS; do
+    if is_lvm2_thinp_device "/dev/$LV"; then
+        THIN_POOLS="$(lvm lvs -S 'lv_layout=sparse && lv_layout=thin' \
+            --nosuffix --noheadings -o vg_name,pool_lv "$LV" \
+            | awk '{printf("%s/%s",$1,$2);}') $THIN_POOLS"
+    fi
+done
+
+THIN_POOLS=$(echo "$THIN_POOLS" | tr ' ' '\n' | sort -u | tr '\n' ' ')
+
+if [ -n "$THIN_POOLS" ]; then
+    if [ -e "/etc/lvm/lvm.conf" ]; then
+        # Use 'monitoring=0' to override the value in lvm.conf, in case
+        # dmeventd monitoring been started after the calling.
+        CONFIG="activation {monitoring=0}"
+    else
+        CONFIG="activation {monitoring=0 thin_pool_autoextend_threshold=70 thin_pool_autoextend_percent=20}"
+    fi
+
+    # Activate the thinpool in case the thinpool is in inactive state.
+    # Otherwise lvextend will fail.
+    for THIN_POOL in $THIN_POOLS; do
+        lvm lvchange -ay "$THIN_POOL" --config "$CONFIG"
+    done
+
+    while true; do
+        for THIN_POOL in $THIN_POOLS; do
+            lvm lvextend --use-policies --config "$CONFIG" "$THIN_POOL"
+        done
+        sleep 5
+    done &
+    echo $! > /run/thinpool-moni.pid
+fi