xfstests: count journal size in test 289

Test 289 ignored the fact that historically journal is not accounted as
fs overhead in ext3. 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.

CC: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
[rjohnston@sgi.com: add lower case units to filter]
Signed-off-by: Rich Johnston <rjohnston@sgi.com>

289

@@ -59,10 +59,18 @@ 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))
+# ext3 doesn't count journal blocks as overhead, ext4 does.
+if [ $FSTYP = "ext3" ]; then
+	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))
+else
+	JOURNAL_BLOCKS=0
+fi
+
+OVERHEAD=$(($TOTAL_BLOCKS-$FREE_BLOCKS-$JOURNAL_BLOCKS))
 
 #  bsddf|minixdf
 #         Set the behaviour  for  the  statfs  system  call.  The  minixdf

common.filter

@@ -265,5 +265,20 @@ _filter_size()
 	sed -e "s/[0-9\.]\+\s\?[b|k|m|g|t][b]\?/<SIZE>/ig"
 }
 
+# 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 $suffix in
+		k|K) mul=1024 ;;
+		m|M) mul=$((1024*1024)) ;;
+		g|G) mul=$((1024*1024*1024)) ;;
+		t|T) mul=$((1024*1024*1024*1024)) ;;
+	esac
+	echo $((${size:0:${#size}-1}*$mul))
+}
+
 # make sure this script returns success
 /bin/true