[PATCH] xfstests: Count journal size in test 289

[Jan Kara]

Test 289 ignored the fact that historically journal is not accounted as
fs overhead. For larger filesystems it is hidden in 1% tolerance but for
filesystems smaller than 12G the test fails. So make the counting
precise to work everywhere.

Signed-off-by: Jan Kara <jack at suse.cz>
---
 289           |   12 ++++++++----
 common.filter |   15 +++++++++++++++
 2 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/289 b/289
index b057c20..9bba144 100755
--- a/289
+++ b/289
@@ -59,10 +59,14 @@ TOTAL_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
 FREE_BLOCKS=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
 		| awk '/Free blocks:/{print $3}'`
 
-# nb: kernels today don't count journal blocks  as overhead, but should.
-# For most filesystems this will still be within tolerance.
-# Overhead is all the blocks (already) used by the fs itself:
-OVERHEAD=$(($TOTAL_BLOCKS-$FREE_BLOCKS))
+JOURNAL_SIZE=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
+		| awk '/Journal size:/{print $3}' | _filter_size_to_bytes`
+BLOCK_SIZE=`dumpe2fs -h $SCRATCH_DEV 2>/dev/null \
+		| awk '/Block size:/{print $3}'`
+JOURNAL_BLOCKS=$(($JOURNAL_SIZE/$BLOCK_SIZE))
+
+# kernels today don't count journal blocks as overhead, but should.
+OVERHEAD=$(($TOTAL_BLOCKS-$FREE_BLOCKS-$JOURNAL_BLOCKS))
 
 #  bsddf|minixdf
 #         Set the behaviour  for  the  statfs  system  call.  The  minixdf
diff --git a/common.filter b/common.filter
index f0f6076..fcd7589 100644
--- a/common.filter
+++ b/common.filter
@@ -229,5 +229,20 @@ _filter_spaces()
        sed -e 's/ [ ]*/ /g'
 }
 
+# Convert string read from stdin like 128K to bytes and print it to stdout
+_filter_size_to_bytes()
+{
+	read size
+	suffix=${size:${#size}-1}
+	mul=1
+	case $suffix in
+		K) mul=1024 ;;
+		M) mul=$((1024*1024)) ;;
+		G) mul=$((1024*1024*1024)) ;;
+		T) mul=$((1024*1024*1024*1024)) ;;
+	esac
+	echo $((${size:0:${#size}-1}*$mul))
+}
+
 # make sure this script returns success
 /bin/true
-- 
1.7.1