/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

/***
    This file is part of systemd.

    Copyright 2014  Tom Gundersen <teg@jklm.no>
    Copyright 2014  Susant Sahani

    systemd 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.

    systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <netinet/ether.h>
#include <arpa/inet.h>
#include <linux/if_bonding.h>

#include "conf-parser.h"
#include "sd-rtnl.h"
#include "networkd-netdev-bond.h"
#include "missing.h"

static const char* const bond_mode_table[_NETDEV_BOND_MODE_MAX] = {
        [NETDEV_BOND_MODE_BALANCE_RR] = "balance-rr",
        [NETDEV_BOND_MODE_ACTIVE_BACKUP] = "active-backup",
        [NETDEV_BOND_MODE_BALANCE_XOR] = "balance-xor",
        [NETDEV_BOND_MODE_BROADCAST] = "broadcast",
        [NETDEV_BOND_MODE_802_3AD] = "802.3ad",
        [NETDEV_BOND_MODE_BALANCE_TLB] = "balance-tlb",
        [NETDEV_BOND_MODE_BALANCE_ALB] = "balance-alb",
};

DEFINE_STRING_TABLE_LOOKUP(bond_mode, BondMode);
DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_mode, bond_mode, BondMode, "Failed to parse bond mode");

static uint8_t bond_mode_to_kernel(BondMode mode) {
        switch (mode) {
        case NETDEV_BOND_MODE_BALANCE_RR:
                return BOND_MODE_ROUNDROBIN;
        case NETDEV_BOND_MODE_ACTIVE_BACKUP:
                return BOND_MODE_ACTIVEBACKUP;
        case NETDEV_BOND_MODE_BALANCE_XOR:
                return BOND_MODE_XOR;
        case NETDEV_BOND_MODE_BROADCAST:
                return BOND_MODE_BROADCAST;
        case NETDEV_BOND_MODE_802_3AD:
                return BOND_MODE_8023AD;
        case NETDEV_BOND_MODE_BALANCE_TLB:
                return BOND_MODE_TLB;
        case NETDEV_BOND_MODE_BALANCE_ALB:
                return BOND_MODE_ALB;
        default:
                return (uint8_t) -1;
        }
}

static int netdev_bond_fill_message_create(NetDev *netdev, sd_rtnl_message *m) {
        int r;

        assert(m);

        r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_IFNAME, attribute: %s",
                                 strerror(-r));
                return r;
        }

        if (netdev->mac) {
                r = sd_rtnl_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac);
                if (r < 0) {
                        log_error_netdev(netdev,
                                         "Colud not append IFLA_ADDRESS attribute: %s",
                                         strerror(-r));
                    return r;
                }
        }

        r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_LINKINFO attribute: %s",
                                 strerror(-r));
                return r;
        }

        r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA,
                                                 netdev_kind_to_string(netdev->kind));
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_INFO_DATA attribute: %s",
                                 strerror(-r));
                return r;
        }

        if (netdev->bond_mode != _NETDEV_BOND_MODE_INVALID) {
                r = sd_rtnl_message_append_u8(m, IFLA_BOND_MODE,
                                              bond_mode_to_kernel(netdev->bond_mode));
                if (r < 0) {
                        log_error_netdev(netdev,
                                         "Could not append IFLA_BOND_MODE attribute: %s",
                                         strerror(-r));
                        return r;
                }
        }

        r = sd_rtnl_message_close_container(m);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_LINKINFO attribute: %s",
                                 strerror(-r));
                return r;
        }

        r = sd_rtnl_message_close_container(m);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_LINKINFO attribute: %s",
                                 strerror(-r));
                return r;
        }

        return r;
}

const NetDevVTable bond_vtable = {
        .fill_message_create = netdev_bond_fill_message_create,
        .enslave = netdev_enslave,
};