Add support for LVM to disk_stress_ng test

1 files changed, 38 insertions, 5 deletions

diff --git a/bin/disk_stress_ng b/bin/disk_stress_ng
index 8445488..802d116 100755
--- a/bin/disk_stress_ng
+++ b/bin/disk_stress_ng
@@ -63,11 +63,40 @@ get_params() {
 } # get_params()
 
 
-# Find the largest partition that holds a supported filesystem on $disk_device.
+# Find the largest logical volume in an LVM partition.
 # Output:
 # $largest_part -- Device filename of largest qualifying partition
 # $largest_size -- Size of largest qualifying partition
 # $largest_fs -- Filesystem (ext4, etc.) used on largest qualifying partition
+# Note: Above variables are initialized in find_largest_partition(), which
+# calls this function.
+# Caveat: If LVM is used, there can be no guarantee that a specific disk
+# device is actually being tested. Thus, an LVM configuration should span
+# just one disk device. LVM may be used on one disk, but subsequent disks
+# should use "raw" partitions.
+find_largest_lv() {
+ local partonly=$(echo $partition | cut -f 3 -d "/")
+ for syslv in $(ls -d /sys/block/dm-*/slaves/$partonly) ; do
+ lv=$(echo "$syslv" | cut -f 4 -d "/")
+ size=$(cat /sys/block/$lv/size)
+ sector_size=$(cat /sys/block/$lv/queue/hw_sector_size)
+ let size=$size*$sector_size
+ local blkid_info=$(blkid -s TYPE /dev/$lv | grep -E ext2\|ext3\|ext4\|xfs\|jfs\|btrfs)
+ if [ "$size" -gt "$largest_size" ] && [ -n "$blkid_info" ] ; then
+ local blkid_info=$(blkid -s TYPE /dev/$lv)
+ largest_size=$size
+ largest_part="/dev/$lv"
+ largest_fs=$(blkid -s TYPE "/dev/$lv" | cut -d "=" -f 2)
+ fi
+ done
+} # find_largest_lv()
+
+
+# Find the largest partition that holds a supported filesystem on $disk_device.
+# Output:
+# $largest_part -- Device filename of largest qualifying partition or logical volume
+# $largest_size -- Size of largest qualifying partition or logical volume
+# $largest_fs -- Filesystem (ext4, etc.) used on largest qualifying partition or logicl volume
 # $unsupported_fs -- Empty or contains name of unsupported filesystem found on disk
 find_largest_partition() {
 largest_part=""
@@ -76,11 +105,15 @@ find_largest_partition() {
 unsupported_fs=""
 for partition in $(echo "$partitions" | cut -d " " -f 1) ; do
 part_size=$(echo "$partitions" | grep "$partition " | cut -d " " -f 2)
- local blkid_info=$(blkid -s TYPE /dev/$partition | grep -E ext2\|ext3\|ext4\|xfs\|jfs\|btrfs)
+ local blkid_info=$(blkid -s TYPE /dev/$partition | grep -E ext2\|ext3\|ext4\|xfs\|jfs\|btrfs\|LVM2_member)
 if [ "$part_size" -gt "$largest_size" ] && [ -n "$blkid_info" ] ; then
- largest_size=$part_size
- largest_part="/dev/$partition"
- largest_fs=$(blkid -s TYPE "/dev/$partition" | cut -d "=" -f 2)
+ if [[ "$blkid_info" =~ .*LVM2_member.* ]] ; then
+ find_largest_lv
+ else
+ largest_size=$part_size
+ largest_part="/dev/$partition"
+ largest_fs=$(blkid -s TYPE "/dev/$partition" | cut -d "=" -f 2)
+ fi
 fi
 local blkid_info=$(blkid -s TYPE /dev/$partition | grep -E ntfs\|vfat\|hfs)
 if [ -n "$blkid_info" ] ; then