[linux-lvm] [PATCH 30/35] test: add helper to compute aligned lv size
Lukas Czerner
lczerner at redhat.com
Wed Sep 21 16:45:49 UTC 2011
For test purposes add a helper function to compute lv size as it
would be done by lvm tools.
Signed-off-by: Lukas Czerner <lczerner at redhat.com>
---
test/lib/utils.sh | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/test/lib/utils.sh b/test/lib/utils.sh
index 4c3cd93..c555e45 100644
--- a/test/lib/utils.sh
+++ b/test/lib/utils.sh
@@ -177,6 +177,29 @@ kernel_at_least() {
return 1
}
+align_size_up() {
+ size=$1
+ [ -z $2 ] && stripes=0
+ [ -z $3 ] && extent=4
+
+ [ -z $size ] || [ -z $stripes ] || [ -z $extent ] && exit 1
+
+ tmp=$((size%extent))
+ if [ $tmp -ne 0 ]; then
+ size=$(($size+($extent-$tmp)))
+ fi
+ if [ $stripes -eq 0 ]; then
+ echo "$size"
+ return 0
+ fi
+ extents=$(($size/$extent))
+ tmp=$(($extents%$stripes))
+ if [ $tmp -ne 0 ]; then
+ extents=$(($extents-$tmp+$stripes))
+ fi
+ echo "$(($extents*$extent))"
+}
+
. lib/paths || { echo >&2 you must run make first; exit 1; }
PATH=$abs_top_builddir/test/lib:$PATH
--
1.7.4.4
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