xfsqa: fix size specification for scratch mkfs

When making a specifically sized scratch filesystem, we need to
calculate the size rather than assigning the caclculation expression
to a variable and passing that into the _scratch_mkfs_sized
function. Currently sized filesystems are failing to be made and the
code is falling back to full sized filesystems so we are not testing
enospc issues correctly.

Signed-off-by: Dave Chinner <david@fromorbit.com>

077

@@ -62,7 +62,7 @@ rm -f $seq.full
 umount $SCRATCH_DEV >/dev/null 2>&1
 echo "*** MKFS ***"                         >>$seq.full
 echo ""                                     >>$seq.full
-let SIZE=50*1024*1024
+SIZE=`expr 50 \* 1024 \* 1024`
 _scratch_mkfs_sized $SIZE                   >>$seq.full 2>&1 \
 	|| _fail "mkfs failed"
 _scratch_mount                              >>$seq.full 2>&1 \

204

@@ -40,7 +40,7 @@ _supported_os Linux
 
 _require_scratch
 
-SIZE=104*1024*1024
+SIZE=`expr 104 \* 1024 \* 1024`
 _scratch_mkfs_sized $SIZE  &> /dev/null
 _scratch_mount
 

common.rc

@@ -320,7 +320,7 @@ _scratch_mkfs_sized()
     fssize=$1
     blocksize=$2
     [ -z "$blocksize" ] && blocksize=4096
-    let blocks=$fssize/$blocksize
+    blocks=`expr $fssize / $blocksize`
 
     case $FSTYP in
     xfs)