132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/*
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* drivers/net/bond/bond_netlink.c - Netlink interface for bonding
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* Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/if_link.h>
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#include <linux/if_ether.h>
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#include <net/netlink.h>
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#include <net/rtnetlink.h>
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#include "bonding.h"
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static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
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[IFLA_BOND_MODE] = { .type = NLA_U8 },
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[IFLA_BOND_ACTIVE_SLAVE] = { .type = NLA_U32 },
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};
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static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
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{
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if (tb[IFLA_ADDRESS]) {
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if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
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return -EINVAL;
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if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
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return -EADDRNOTAVAIL;
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}
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return 0;
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}
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static int bond_changelink(struct net_device *bond_dev,
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struct nlattr *tb[], struct nlattr *data[])
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{
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struct bonding *bond = netdev_priv(bond_dev);
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int err;
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if (data && data[IFLA_BOND_MODE]) {
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int mode = nla_get_u8(data[IFLA_BOND_MODE]);
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err = bond_option_mode_set(bond, mode);
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if (err)
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return err;
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}
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if (data && data[IFLA_BOND_ACTIVE_SLAVE]) {
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int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]);
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struct net_device *slave_dev;
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if (ifindex == 0) {
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slave_dev = NULL;
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} else {
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slave_dev = __dev_get_by_index(dev_net(bond_dev),
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ifindex);
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if (!slave_dev)
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return -ENODEV;
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}
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err = bond_option_active_slave_set(bond, slave_dev);
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if (err)
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return err;
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}
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return 0;
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}
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static int bond_newlink(struct net *src_net, struct net_device *bond_dev,
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struct nlattr *tb[], struct nlattr *data[])
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{
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int err;
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err = bond_changelink(bond_dev, tb, data);
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if (err < 0)
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return err;
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return register_netdevice(bond_dev);
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}
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static size_t bond_get_size(const struct net_device *bond_dev)
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{
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return nla_total_size(sizeof(u8)) + /* IFLA_BOND_MODE */
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nla_total_size(sizeof(u32)); /* IFLA_BOND_ACTIVE_SLAVE */
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}
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static int bond_fill_info(struct sk_buff *skb,
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const struct net_device *bond_dev)
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{
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struct bonding *bond = netdev_priv(bond_dev);
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struct net_device *slave_dev = bond_option_active_slave_get(bond);
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if (nla_put_u8(skb, IFLA_BOND_MODE, bond->params.mode) ||
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(slave_dev &&
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nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, slave_dev->ifindex)))
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goto nla_put_failure;
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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struct rtnl_link_ops bond_link_ops __read_mostly = {
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.kind = "bond",
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.priv_size = sizeof(struct bonding),
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.setup = bond_setup,
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.maxtype = IFLA_BOND_MAX,
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.policy = bond_policy,
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.validate = bond_validate,
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.newlink = bond_newlink,
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.changelink = bond_changelink,
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.get_size = bond_get_size,
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.fill_info = bond_fill_info,
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.get_num_tx_queues = bond_get_num_tx_queues,
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.get_num_rx_queues = bond_get_num_tx_queues, /* Use the same number
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as for TX queues */
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};
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int __init bond_netlink_init(void)
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{
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return rtnl_link_register(&bond_link_ops);
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}
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void bond_netlink_fini(void)
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{
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rtnl_link_unregister(&bond_link_ops);
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}
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MODULE_ALIAS_RTNL_LINK("bond");
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