xfs/24[356]: check for -c switch to xfs_io bmap command

Extend _require_xfs_io_command so that we can pass it a command line
argument to look for, and then use new capabililty in the relevant
tests to ensure that bmap knows how to dump CoW fork contents (bmap -c)

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>

common/rc

@@ -1852,12 +1852,13 @@ _user_do()
 
 _require_xfs_io_command()
 {
-	if [ $# -ne 1 ]
+	if [ -z "$1" ]
 	then
-		echo "Usage: _require_xfs_io_command command" 1>&2
+		echo "Usage: _require_xfs_io_command command [switch]" 1>&2
 		exit 1
 	fi
 	command=$1
+	param=$2
 
 	testfile=$TEST_DIR/$$.xfs_io
 	case $command in
@@ -1887,6 +1888,10 @@ _require_xfs_io_command()
 		_notrun "xfs_io $command support is missing"
 	echo $testio | grep -q "Operation not supported" && \
 		_notrun "xfs_io $command failed (old kernel/wrong fs?)"
+
+	test -z "$param" && return
+	$XFS_IO_PROG -c "help $command" | grep -q "^ $param --" || \
+		_notrun "xfs_io $command doesn't support $param"
 }
 
 # check that xfs_db supports a specific command

tests/xfs/243

@@ -56,6 +56,7 @@ _supported_fs xfs
 _require_scratch_reflink
 _require_xfs_io_command "falloc"
 _require_xfs_io_command "fpunch"
+_require_xfs_io_command "bmap" "-c"
 _require_cp_reflink
 
 rm -f $seqres.full

tests/xfs/245

@@ -49,6 +49,7 @@ _supported_os Linux
 _supported_fs xfs
 _require_scratch_reflink
 _require_xfs_io_command "falloc"
+_require_xfs_io_command "bmap" "-c"
 _require_cp_reflink
 
 rm -f $seqres.full

tests/xfs/246

@@ -42,6 +42,7 @@ _cleanup()
 # real QA test starts here
 _supported_os Linux
 _supported_fs xfs
+_require_xfs_io_command "bmap" "-c"
 
 rm -f $seqres.full