ip: iplink_bond.c: add json output support

ip: iplink_bond.c: add json output support

Schema and live example:
bond: IFLA_INFO_DATA
{
    "mode": {
        "type": "string",
        "attr": "IFLA_BOND_MODE"
    },
    "active_slave": {
        "type": "string",
        "attr": "IFLA_BOND_ACTIVE_SLAVE",
        "mutually_exclusive": {
            "active_slave_index": {
                "type": "int",
                "comment": "if active slave doesn't have a valid ifname"
            }
        }
    },
    "miimon": {
        "type": "uint",
        "attr": "IFLA_BOND_MIIMON"
    },
    "updelay": {
        "type": "uint",
        "attr": "IFLA_BOND_UPDELAY"
    },
    "downdelay": {
        "type": "uint",
        "attr": "IFLA_BOND_DOWNDELAY"
    },
    "use_carrier": {
        "type": "uint",
        "attr": "IFLA_BOND_USE_CARRIER"
    },
    "arp_interval": {
        "type": "uint",
        "attr": "IFLA_BOND_ARP_INTERVAL"
    },
    "arp_ip_target": {
        "type": "array",
        "attr": "IFLA_BOND_ARP_IP_TARGET",
        "array": [
            {
                "type": "string"
            }
        ]
    },
    "arp_validate": {
        "type": "string",
        "attr": "IFLA_BOND_ARP_VALIDATE"
    },
    "arp_all_targets": {
        "type": "string",
        "attr": "IFLA_BOND_ARP_ALL_TARGETS"
    },
    "primary": {
        "type": "string",
        "attr": "IFLA_BOND_PRIMARY",
        "mutually_exclusive": {
            "primary_index": {
                "type": "int",
                "comment": "if primary doesn't have a valid ifname"
            }
        }
    },
    "primary_reselect": {
        "type": "string",
        "attr": "IFLA_BOND_PRIMARY_RESELECT"
    },
    "fail_over_mac": {
        "type": "string",
        "attr": "IFLA_BOND_FAIL_OVER_MAC"
    },
    "xmit_hash_policy": {
        "type": "string",
        "attr": "IFLA_BOND_XMIT_HASH_POLICY"
    },
    "resend_igmp": {
        "type": "uint",
        "attr": "IFLA_BOND_RESEND_IGMP"
    },
    "num_peer_notif": {
        "type": "uint",
        "attr": "IFLA_BOND_NUM_PEER_NOTIF"
    },
    "all_slaves_active": {
        "type": "uint",
        "attr": "IFLA_BOND_ALL_SLAVES_ACTIVE"
    },
    "min_links": {
        "type": "uint",
        "attr": "IFLA_BOND_MIN_LINKS"
    },
    "lp_interval": {
        "type": "uint",
        "attr": "IFLA_BOND_LP_INTERVAL"
    },
    "packets_per_slave": {
        "type": "uint",
        "attr": "IFLA_BOND_PACKETS_PER_SLAVE"
    },
    "ad_lacp_rate": {
        "type": "string",
        "attr": "IFLA_BOND_AD_LACP_RATE"
    },
    "ad_select": {
        "type": "string",
        "attr": "IFLA_BOND_AD_SELECT"
    },
    "ad_info": {
        "type": "dict",
        "attr": "IFLA_BOND_AD_INFO",
        "dict": {
            "aggregator": {
                "type": "int",
                "attr": "IFLA_BOND_AD_INFO_AGGREGATOR"
            },
            "num_ports": {
                "type": "int",
                "attr": "IFLA_BOND_AD_INFO_NUM_PORTS"
            },
            "actor_key": {
                "type": "int",
                "attr": "IFLA_BOND_AD_INFO_ACTOR_KEY"
            },
            "partner_key": {
                "type": "int",
                "attr": "IFLA_BOND_AD_INFO_PARTNER_KEY"
            },
            "partner_mac": {
                "type": "string",
                "attr": "IFLA_BOND_AD_INFO_PARTNER_MAC"
            }
        }
    },
    "ad_actor_sys_prio": {
        "type": "uint",
        "attr": "IFLA_BOND_AD_ACTOR_SYS_PRIO"
    },
    "ad_user_port_key": {
        "type": "uint",
        "attr": "IFLA_BOND_AD_USER_PORT_KEY"
    },
    "ad_actor_system": {
        "type": "string",
        "attr": "IFLA_BOND_AD_ACTOR_SYSTEM"
    },
    "tlb_dynamic_lb": {
        "type": "uint",
        "attr": "IFLA_BOND_TLB_DYNAMIC_LB"
    }
}

$ ip link add dev bond42 type bond
$ ip link set dev swp5 master bond42
$ ip link set dev bond42 up
$ ip link set dev swp5 up
$ ip -details -json link show
[{
        "ifindex": 7,
        "ifname": "swp5",
        "flags": ["BROADCAST","MULTICAST","SLAVE","UP","LOWER_UP"],
        "mtu": 1500,
        "qdisc": "pfifo_fast",
        "master": "bond42",
        "operstate": "UP",
        "linkmode": "DEFAULT",
        "group": "default",
        "txqlen": 1000,
        "link_type": "ether",
        "address": "08:00:27:5c:03:c6",
        "broadcast": "ff:ff:ff:ff:ff:ff",
        "promiscuity": 0,
        "linkinfo": {
            "info_slave_kind": "bond",
            "info_slave_data": {
                "state": "BACKUP",
                "mii_status": "UP",
                "link_failure_count": 0,
                "perm_hwaddr": "08:00:27:5c:03:c6",
                "queue_id": 0,
                "ad_aggregator_id": 1,
                "ad_actor_oper_port_state": 79,
                "ad_partner_oper_port_state": 1
            }
        },
        "inet6_addr_gen_mode": "eui64",
        "num_tx_queues": 1,
        "num_rx_queues": 1,
        "gso_max_size": 65536,
        "gso_max_segs": 65535
    },{
        "ifindex": 14,
        "ifname": "bond42",
        "flags": ["NO-CARRIER","BROADCAST","MULTICAST","MASTER","UP"],
        "mtu": 1500,
        "qdisc": "noqueue",
        "operstate": "DOWN",
        "linkmode": "DEFAULT",
        "group": "default",
        "link_type": "ether",
        "address": "08:00:27:5c:03:c6",
        "broadcast": "ff:ff:ff:ff:ff:ff",
        "promiscuity": 0,
        "linkinfo": {
            "info_kind": "bond",
            "info_data": {
                "mode": "802.3ad",
                "miimon": 100,
                "updelay": 0,
                "downdelay": 0,
                "use_carrier": 1,
                "arp_interval": 0,
                "arp_validate": null,
                "arp_all_targets": "any",
                "primary_reselect": "always",
                "fail_over_mac": "none",
                "xmit_hash_policy": "layer3+4",
                "resend_igmp": 1,
                "num_peer_notif": 1,
                "all_slaves_active": 0,
                "min_links": 1,
                "lp_interval": 1,
                "packets_per_slave": 1,
                "ad_lacp_rate": "fast",
                "ad_select": "stable",
                "ad_info": {
                    "aggregator": 1,
                    "num_ports": 1,
                    "actor_key": 0,
                    "partner_key": 1,
                    "partner_mac": "00:00:00:00:00:00"
                },
                "ad_actor_sys_prio": 65535,
                "ad_user_port_key": 0,
                "ad_actor_system": "00:00:00:00:00:00"
            }
        },
        "inet6_addr_gen_mode": "eui64",
        "num_tx_queues": 16,
        "num_rx_queues": 16,
        "gso_max_size": 65536,
        "gso_max_segs": 65535
    }
]

Signed-off-by: Julien Fortin <julien@cumulusnetworks.com>