fsstress: add operation for listing xattrs from files and directories

The previous patches added support for operations to set, get and delete
xattrs on regular files and directories, this patch just adds an operation
to list the xattrs of a file/directory.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
1 file changed