List mounted filesystems.

def _get_mounts():
    '''
    List mounted filesystems.
    '''
    mounts = {}
    with salt.utils.files.fopen("/proc/mounts") as fhr:
        for line in salt.utils.data.decode(fhr.readlines()):
            device, mntpnt, fstype, options, fs_freq, fs_passno = line.strip().split(" ")
            if fstype != 'xfs':
                continue
            mounts[device] = {
                'mount_point': mntpnt,
                'options': options.split(","),
            }

    return mounts