From 4841f53ca6cfd56bff046cba431ce89fa8500733 Mon Sep 17 00:00:00 2001
From: "Kabanov, Dmitrii" <dmitrii.kabanov@att.com>
Date: Tue, 26 May 2020 15:03:59 -0700
Subject: [PATCH] [Ceph-osd] Avoid using lsblk/blkid.

The PS improves performance by replacing lsblk/blkid (In some cases blkid may be pretty slow).
Also it allows to avoid deadlocks when there are RBDs mapped on the host.

Change-Id: If607e168515f55478e9e55e421738d2d00269d3f
---
 ceph-osd/templates/bin/osd/ceph-volume/_common.sh.tpl | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/ceph-osd/templates/bin/osd/ceph-volume/_common.sh.tpl b/ceph-osd/templates/bin/osd/ceph-volume/_common.sh.tpl
index 9ab63df5e3..4c5f72c50c 100644
--- a/ceph-osd/templates/bin/osd/ceph-volume/_common.sh.tpl
+++ b/ceph-osd/templates/bin/osd/ceph-volume/_common.sh.tpl
@@ -213,8 +213,8 @@ function zap_extra_partitions {
 function disk_zap {
   # Run all the commands that ceph-disk zap uses to clear a disk
   local device=${1}
-  local device_filter=$(echo $device | cut -d'/' -f3)
-  local dm_devices=$(lsblk -o name,type -l | grep "lvm" | grep "$device_filter" | awk '/ceph/{print $1}' | tr '\n' ' ')
+  local device_filter=$(basename "${device}")
+  local dm_devices=$(get_lvm_path_from_device "pv_name=~${device_filter},lv_name=~ceph")
   for dm_device in ${dm_devices}; do
     if [[ ! -z ${dm_device} ]]; then
       dmsetup remove ${dm_device}
@@ -384,6 +384,13 @@ function get_osd_wal_device_from_device {
   get_lvm_tag_from_device ${device} ceph.wal_device
 }
 
+function get_lvm_path_from_device {
+  select="$1"
+
+  options="--noheadings -o lv_dm_path"
+  pvs ${options} -S "${select}" | tr -d ' '
+}
+
 function set_device_class {
   if [ ! -z "$DEVICE_CLASS" ]; then
     if [ "x$DEVICE_CLASS" != "x$(get_device_class)" ]; then