[PATCH] _scratch_mkfs_geom: Fix regex used for matching block size option

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The regular expression used by _scratch_mkfs_geom() to match mkfs.xfs' block
size argument interprets the character 'b' as optional. It should actually
interpret whitespace as optional.

This causes generic/223 to fail when testing an XFS filesystem which uses an
external log device along with the -lsize option. In this case, the original
value of -lsize is replaced with the value of $blocksize.

_scratch_mkfs_sized() also uses the same incorrect regex.

Signed-off-by: Chandan Babu R <chandanbabu@xxxxxxxxxx>
---
 common/rc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/common/rc b/common/rc
index 5c4429ed..991a5731 100644
--- a/common/rc
+++ b/common/rc
@@ -971,7 +971,7 @@ _scratch_mkfs_sized()
 	case $FSTYP in
 	xfs)
 		# don't override MKFS_OPTIONS that set a block size.
-		echo $MKFS_OPTIONS |grep -E -q "b?size="
+		echo $MKFS_OPTIONS |grep -E -q "b\s*size="
 		if [ $? -eq 0 ]; then
 			_scratch_mkfs_xfs -d size=$fssize $rt_ops
 		else
@@ -1063,8 +1063,8 @@ _scratch_mkfs_geom()
 
     case $FSTYP in
     xfs)
-	if echo "$MKFS_OPTIONS" | grep -E -q "b?size="; then
-		MKFS_OPTIONS=$(echo "$MKFS_OPTIONS" | sed -r "s/(b?size=)[0-9]+k?/\1$blocksize/")
+	if echo "$MKFS_OPTIONS" | grep -E -q "b\s*size="; then
+		MKFS_OPTIONS=$(echo "$MKFS_OPTIONS" | sed -r "s/(b\s*size=)[0-9]+k?/\1$blocksize/")
 	else
 		MKFS_OPTIONS+=" -b size=$blocksize"
 	fi
-- 
2.39.1




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