T5474: establish common file name pattern for XML conf mode commands

We will use _ as CLI level divider. The XML definition filename and also
the Python helper should match the CLI node.

Example:
set interfaces ethernet -> interfaces_ethernet.xml.in
set interfaces bond -> interfaces_bond.xml.in
set service dhcp-server -> service_dhcp-server-xml.in

(cherry picked from commit 4ef110fd2c501b718344c72d495ad7e16d2bd465)

1 files changed, 294 insertions, 0 deletions

diff --git a/src/conf_mode/interfaces_bonding.py b/src/conf_mode/interfaces_bonding.py
new file mode 100755
index 000000000..8184d8415
--- /dev/null
+++ b/src/conf_mode/interfaces_bonding.py
@@ -0,0 +1,294 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2019-2023 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+
+from sys import exit
+from netifaces import interfaces
+from vyos.config import Config
+from vyos.configdict import get_interface_dict
+from vyos.configdict import is_node_changed
+from vyos.configdict import leaf_node_changed
+from vyos.configdict import is_member
+from vyos.configdict import is_source_interface
+from vyos.configverify import verify_address
+from vyos.configverify import verify_bridge_delete
+from vyos.configverify import verify_dhcpv6
+from vyos.configverify import verify_mirror_redirect
+from vyos.configverify import verify_mtu_ipv6
+from vyos.configverify import verify_source_interface
+from vyos.configverify import verify_vlan_config
+from vyos.configverify import verify_vrf
+from vyos.ifconfig import BondIf
+from vyos.ifconfig.ethernet import EthernetIf
+from vyos.ifconfig import Section
+from vyos.template import render_to_string
+from vyos.utils.dict import dict_search
+from vyos.utils.dict import dict_to_paths_values
+from vyos.configdict import has_address_configured
+from vyos.configdict import has_vrf_configured
+from vyos.configdep import set_dependents, call_dependents
+from vyos import ConfigError
+from vyos import frr
+from vyos import airbag
+airbag.enable()
+
+def get_bond_mode(mode):
+    if mode == 'round-robin':
+        return 'balance-rr'
+    elif mode == 'active-backup':
+        return 'active-backup'
+    elif mode == 'xor-hash':
+        return 'balance-xor'
+    elif mode == 'broadcast':
+        return 'broadcast'
+    elif mode == '802.3ad':
+        return '802.3ad'
+    elif mode == 'transmit-load-balance':
+        return 'balance-tlb'
+    elif mode == 'adaptive-load-balance':
+        return 'balance-alb'
+    else:
+        raise ConfigError(f'invalid bond mode "{mode}"')
+
+def get_config(config=None):
+    """
+    Retrive CLI config as dictionary. Dictionary can never be empty, as at least the
+    interface name will be added or a deleted flag
+    """
+    if config:
+        conf = config
+    else:
+        conf = Config()
+    base = ['interfaces', 'bonding']
+    ifname, bond = get_interface_dict(conf, base)
+
+    # To make our own life easier transfor the list of member interfaces
+    # into a dictionary - we will use this to add additional information
+    # later on for each member
+    if 'member' in bond and 'interface' in bond['member']:
+        # convert list of member interfaces to a dictionary
+        bond['member']['interface'] = {k: {} for k in bond['member']['interface']}
+
+    if 'mode' in bond:
+        bond['mode'] = get_bond_mode(bond['mode'])
+
+    tmp = is_node_changed(conf, base + [ifname, 'mode'])
+    if tmp: bond['shutdown_required'] = {}
+
+    tmp = is_node_changed(conf, base + [ifname, 'lacp-rate'])
+    if tmp: bond['shutdown_required'] = {}
+
+    # determine which members have been removed
+    interfaces_removed = leaf_node_changed(conf, base + [ifname, 'member', 'interface'])
+    # Reset config level to interfaces
+    old_level = conf.get_level()
+    conf.set_level(['interfaces'])
+
+    if interfaces_removed:
+        bond['shutdown_required'] = {}
+        if 'member' not in bond:
+            bond['member'] = {}
+
+        tmp = {}
+        for interface in interfaces_removed:
+            # if member is deleted from bond, add dependencies to call
+            # ethernet commit again in apply function
+            # to apply options under ethernet section
+            set_dependents('ethernet', conf, interface)
+            section = Section.section(interface) # this will be 'ethernet' for 'eth0'
+            if conf.exists([section, interface, 'disable']):
+                tmp[interface] = {'disable': ''}
+            else:
+                tmp[interface] = {}
+
+        # also present the interfaces to be removed from the bond as dictionary
+        bond['member']['interface_remove'] = tmp
+
+    # Restore existing config level
+    conf.set_level(old_level)
+
+    if dict_search('member.interface', bond):
+        for interface, interface_config in bond['member']['interface'].items():
+
+            interface_ethernet_config = conf.get_config_dict(
+                ['interfaces', 'ethernet', interface],
+                key_mangling=('-', '_'),
+                get_first_key=True,
+                no_tag_node_value_mangle=True,
+                with_defaults=False,
+                with_recursive_defaults=False)
+
+            interface_config['config_paths'] = dict_to_paths_values(interface_ethernet_config)
+
+            # Check if member interface is a new member
+            if not conf.exists_effective(base + [ifname, 'member', 'interface', interface]):
+                bond['shutdown_required'] = {}
+                interface_config['new_added'] = {}
+
+            # Check if member interface is disabled
+            conf.set_level(['interfaces'])
+
+            section = Section.section(interface) # this will be 'ethernet' for 'eth0'
+            if conf.exists([section, interface, 'disable']):
+                interface_config['disable'] = ''
+
+            conf.set_level(old_level)
+
+            # Check if member interface is already member of another bridge
+            tmp = is_member(conf, interface, 'bridge')
+            if tmp: interface_config['is_bridge_member'] = tmp
+
+            # Check if member interface is already member of a bond
+            tmp = is_member(conf, interface, 'bonding')
+            for tmp in is_member(conf, interface, 'bonding'):
+                if bond['ifname'] == tmp:
+                    continue
+                interface_config['is_bond_member'] = tmp
+
+            # Check if member interface is used as source-interface on another interface
+            tmp = is_source_interface(conf, interface)
+            if tmp: interface_config['is_source_interface'] = tmp
+
+            # bond members must not have an assigned address
+            tmp = has_address_configured(conf, interface)
+            if tmp: interface_config['has_address'] = {}
+
+            # bond members must not have a VRF attached
+            tmp = has_vrf_configured(conf, interface)
+            if tmp: interface_config['has_vrf'] = {}
+    return bond
+
+
+def verify(bond):
+    if 'deleted' in bond:
+        verify_bridge_delete(bond)
+        return None
+
+    if 'arp_monitor' in bond:
+        if 'target' in bond['arp_monitor'] and len(bond['arp_monitor']['target']) > 16:
+            raise ConfigError('The maximum number of arp-monitor targets is 16')
+
+        if 'interval' in bond['arp_monitor'] and int(bond['arp_monitor']['interval']) > 0:
+            if bond['mode'] in ['802.3ad', 'balance-tlb', 'balance-alb']:
+                raise ConfigError('ARP link monitoring does not work for mode 802.3ad, ' \
+                                  'transmit-load-balance or adaptive-load-balance')
+
+    if 'primary' in bond:
+        if bond['mode'] not in ['active-backup', 'balance-tlb', 'balance-alb']:
+            raise ConfigError('Option primary - mode dependency failed, not'
+                              'supported in mode {mode}!'.format(**bond))
+
+    verify_mtu_ipv6(bond)
+    verify_address(bond)
+    verify_dhcpv6(bond)
+    verify_vrf(bond)
+    verify_mirror_redirect(bond)
+
+    # use common function to verify VLAN configuration
+    verify_vlan_config(bond)
+
+    bond_name = bond['ifname']
+    if dict_search('member.interface', bond):
+        for interface, interface_config in bond['member']['interface'].items():
+            error_msg = f'Can not add interface "{interface}" to bond, '
+
+            if interface == 'lo':
+                raise ConfigError('Loopback interface "lo" can not be added to a bond')
+
+            if interface not in interfaces():
+                raise ConfigError(error_msg + 'it does not exist!')
+
+            if 'is_bridge_member' in interface_config:
+                tmp = next(iter(interface_config['is_bridge_member']))
+                raise ConfigError(error_msg + f'it is already a member of bridge "{tmp}"!')
+
+            if 'is_bond_member' in interface_config:
+                tmp = next(iter(interface_config['is_bond_member']))
+                raise ConfigError(error_msg + f'it is already a member of bond "{tmp}"!')
+
+            if 'is_source_interface' in interface_config:
+                tmp = interface_config['is_source_interface']
+                raise ConfigError(error_msg + f'it is the source-interface of "{tmp}"!')
+
+            if 'has_address' in interface_config:
+                raise ConfigError(error_msg + 'it has an address assigned!')
+
+            if 'has_vrf' in interface_config:
+                raise ConfigError(error_msg + 'it has a VRF assigned!')
+
+            if 'new_added' in interface_config and 'config_paths' in interface_config:
+                for option_path, option_value in interface_config['config_paths'].items():
+                    if option_path in EthernetIf.get_bond_member_allowed_options() :
+                        continue
+                    if option_path in BondIf.get_inherit_bond_options():
+                        continue
+                    raise ConfigError(error_msg + f'it has a "{option_path.replace(".", " ")}" assigned!')
+
+    if 'primary' in bond:
+        if bond['primary'] not in bond['member']['interface']:
+            raise ConfigError(f'Primary interface of bond "{bond_name}" must be a member interface')
+
+        if bond['mode'] not in ['active-backup', 'balance-tlb', 'balance-alb']:
+            raise ConfigError('primary interface only works for mode active-backup, ' \
+                              'transmit-load-balance or adaptive-load-balance')
+
+    return None
+
+def generate(bond):
+    bond['frr_zebra_config'] = ''
+    if 'deleted' not in bond:
+        bond['frr_zebra_config'] = render_to_string('frr/evpn.mh.frr.j2', bond)
+    return None
+
+def apply(bond):
+    ifname = bond['ifname']
+    b = BondIf(ifname)
+    if 'deleted' in bond:
+        # delete interface
+        b.remove()
+    else:
+        b.update(bond)
+
+    if dict_search('member.interface_remove', bond):
+        try:
+            call_dependents()
+        except ConfigError:
+            raise ConfigError('Error in updating ethernet interface '
+                              'after deleting it from bond')
+
+    zebra_daemon = 'zebra'
+    # Save original configuration prior to starting any commit actions
+    frr_cfg = frr.FRRConfig()
+
+    # The route-map used for the FIB (zebra) is part of the zebra daemon
+    frr_cfg.load_configuration(zebra_daemon)
+    frr_cfg.modify_section(f'^interface {ifname}', stop_pattern='^exit', remove_stop_mark=True)
+    if 'frr_zebra_config' in bond:
+        frr_cfg.add_before(frr.default_add_before, bond['frr_zebra_config'])
+    frr_cfg.commit_configuration(zebra_daemon)
+
+    return None
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)