# Copyright VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library.  If not, see <http://www.gnu.org/licenses/>.

# Delete 'vpp settings interface ethX xdp-options no-syscall-lock'
# since it is set automatically

from vyos.configtree import ConfigTree

base = ['vpp', 'settings', 'interface']

def migrate(config: ConfigTree) -> None:
    if not config.exists(base):
        # Nothing to do
        return

    for iface_name in config.list_nodes(base):
        xdp_options_base = base + [iface_name, 'xdp-options']
        if config.exists(xdp_options_base + ['no-syscall-lock']):
            # Delete no-syscall-lock option from configuration
            config.delete(xdp_options_base + ['no-syscall-lock'])
        if config.exists(xdp_options_base) and len(config.list_nodes(xdp_options_base)) == 0:
            config.delete(xdp_options_base)