[PATCH] xfstests: use correct size value in generic/273

[Brian Foster]

generic/273 factors the "space available" output from df into the
calculation for the size of the origin data set. Recent commit

  bfdd1e72b358 xfstests: added -P option to $DF_PROG

... converted the use of 'df' to $DF_PROG. This implicitly adds the
-T parameter to add the fs type column, shifts the available space
column over by one and unintentionally causes 273 to look at "used
space" and create too small of a data set for a useful test.
Realign to the to the available space value.

Signed-off-by: Brian Foster <bfoster at redhat.com>
---
 tests/generic/273 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/generic/273 b/tests/generic/273
index 63bbf9b..2d54493 100755
--- a/tests/generic/273
+++ b/tests/generic/273
@@ -68,7 +68,7 @@ _file_create()
 
 	cd $SCRATCH_MNT/origin
 
-	_disksize=`$DF_PROG --block-size=1 $SCRATCH_DEV | awk -v sd=$SCRATCH_DEV 'BEGIN{c=0}{for(i=1;i<=NF;++i){a[c]=$i;++c}}END{for(entry in a){if(a[entry] ~ sd){print a[entry + 3]; break}}}'`
+	_disksize=`$DF_PROG --block-size=1 $SCRATCH_DEV | awk -v sd=$SCRATCH_DEV 'BEGIN{c=0}{for(i=1;i<=NF;++i){a[c]=$i;++c}}END{for(entry in a){if(a[entry] ~ sd){print a[entry + 4]; break}}}'`
 	_disksize=$(($_disksize / 3))
 	_num=$(($_disksize / $count / $threads / 4096))
 	_count=$count
-- 
1.8.1.4