| /* |
| * drivers/net/bond/bond_netlink.c - Netlink interface for bonding |
| * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> |
| * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/if_link.h> |
| #include <linux/if_ether.h> |
| #include <net/netlink.h> |
| #include <net/rtnetlink.h> |
| #include "bonding.h" |
| |
| static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = { |
| [IFLA_BOND_MODE] = { .type = NLA_U8 }, |
| [IFLA_BOND_ACTIVE_SLAVE] = { .type = NLA_U32 }, |
| [IFLA_BOND_MIIMON] = { .type = NLA_U32 }, |
| [IFLA_BOND_UPDELAY] = { .type = NLA_U32 }, |
| [IFLA_BOND_DOWNDELAY] = { .type = NLA_U32 }, |
| [IFLA_BOND_USE_CARRIER] = { .type = NLA_U8 }, |
| [IFLA_BOND_ARP_INTERVAL] = { .type = NLA_U32 }, |
| [IFLA_BOND_ARP_IP_TARGET] = { .type = NLA_NESTED }, |
| [IFLA_BOND_ARP_VALIDATE] = { .type = NLA_U32 }, |
| [IFLA_BOND_ARP_ALL_TARGETS] = { .type = NLA_U32 }, |
| }; |
| |
| static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) |
| { |
| if (tb[IFLA_ADDRESS]) { |
| if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) |
| return -EINVAL; |
| if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) |
| return -EADDRNOTAVAIL; |
| } |
| return 0; |
| } |
| |
| static int bond_changelink(struct net_device *bond_dev, |
| struct nlattr *tb[], struct nlattr *data[]) |
| { |
| struct bonding *bond = netdev_priv(bond_dev); |
| int miimon = 0; |
| int err; |
| |
| if (!data) |
| return 0; |
| |
| if (data[IFLA_BOND_MODE]) { |
| int mode = nla_get_u8(data[IFLA_BOND_MODE]); |
| |
| err = bond_option_mode_set(bond, mode); |
| if (err) |
| return err; |
| } |
| if (data[IFLA_BOND_ACTIVE_SLAVE]) { |
| int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]); |
| struct net_device *slave_dev; |
| |
| if (ifindex == 0) { |
| slave_dev = NULL; |
| } else { |
| slave_dev = __dev_get_by_index(dev_net(bond_dev), |
| ifindex); |
| if (!slave_dev) |
| return -ENODEV; |
| } |
| err = bond_option_active_slave_set(bond, slave_dev); |
| if (err) |
| return err; |
| } |
| if (data[IFLA_BOND_MIIMON]) { |
| miimon = nla_get_u32(data[IFLA_BOND_MIIMON]); |
| |
| err = bond_option_miimon_set(bond, miimon); |
| if (err) |
| return err; |
| } |
| if (data[IFLA_BOND_UPDELAY]) { |
| int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]); |
| |
| err = bond_option_updelay_set(bond, updelay); |
| if (err) |
| return err; |
| } |
| if (data[IFLA_BOND_DOWNDELAY]) { |
| int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]); |
| |
| err = bond_option_downdelay_set(bond, downdelay); |
| if (err) |
| return err; |
| } |
| if (data[IFLA_BOND_USE_CARRIER]) { |
| int use_carrier = nla_get_u8(data[IFLA_BOND_USE_CARRIER]); |
| |
| err = bond_option_use_carrier_set(bond, use_carrier); |
| if (err) |
| return err; |
| } |
| if (data[IFLA_BOND_ARP_INTERVAL]) { |
| int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]); |
| |
| if (arp_interval && miimon) { |
| pr_err("%s: ARP monitoring cannot be used with MII monitoring.\n", |
| bond->dev->name); |
| return -EINVAL; |
| } |
| |
| err = bond_option_arp_interval_set(bond, arp_interval); |
| if (err) |
| return err; |
| } |
| if (data[IFLA_BOND_ARP_IP_TARGET]) { |
| __be32 targets[BOND_MAX_ARP_TARGETS] = { 0, }; |
| struct nlattr *attr; |
| int i = 0, rem; |
| |
| nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) { |
| __be32 target = nla_get_u32(attr); |
| targets[i++] = target; |
| } |
| |
| err = bond_option_arp_ip_targets_set(bond, targets, i); |
| if (err) |
| return err; |
| } |
| if (data[IFLA_BOND_ARP_VALIDATE]) { |
| int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]); |
| |
| if (arp_validate && miimon) { |
| pr_err("%s: ARP validating cannot be used with MII monitoring.\n", |
| bond->dev->name); |
| return -EINVAL; |
| } |
| |
| err = bond_option_arp_validate_set(bond, arp_validate); |
| if (err) |
| return err; |
| } |
| if (data[IFLA_BOND_ARP_ALL_TARGETS]) { |
| int arp_all_targets = |
| nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]); |
| |
| err = bond_option_arp_all_targets_set(bond, arp_all_targets); |
| if (err) |
| return err; |
| } |
| return 0; |
| } |
| |
| static int bond_newlink(struct net *src_net, struct net_device *bond_dev, |
| struct nlattr *tb[], struct nlattr *data[]) |
| { |
| int err; |
| |
| err = bond_changelink(bond_dev, tb, data); |
| if (err < 0) |
| return err; |
| |
| return register_netdevice(bond_dev); |
| } |
| |
| static size_t bond_get_size(const struct net_device *bond_dev) |
| { |
| return nla_total_size(sizeof(u8)) + /* IFLA_BOND_MODE */ |
| nla_total_size(sizeof(u32)) + /* IFLA_BOND_ACTIVE_SLAVE */ |
| nla_total_size(sizeof(u32)) + /* IFLA_BOND_MIIMON */ |
| nla_total_size(sizeof(u32)) + /* IFLA_BOND_UPDELAY */ |
| nla_total_size(sizeof(u32)) + /* IFLA_BOND_DOWNDELAY */ |
| nla_total_size(sizeof(u8)) + /* IFLA_BOND_USE_CARRIER */ |
| nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_INTERVAL */ |
| /* IFLA_BOND_ARP_IP_TARGET */ |
| nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS + |
| nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_VALIDATE */ |
| nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_ALL_TARGETS */ |
| 0; |
| } |
| |
| static int bond_fill_info(struct sk_buff *skb, |
| const struct net_device *bond_dev) |
| { |
| struct bonding *bond = netdev_priv(bond_dev); |
| struct net_device *slave_dev = bond_option_active_slave_get(bond); |
| struct nlattr *targets; |
| int i, targets_added; |
| |
| if (nla_put_u8(skb, IFLA_BOND_MODE, bond->params.mode)) |
| goto nla_put_failure; |
| |
| if (slave_dev && |
| nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, slave_dev->ifindex)) |
| goto nla_put_failure; |
| |
| if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon)) |
| goto nla_put_failure; |
| |
| if (nla_put_u32(skb, IFLA_BOND_UPDELAY, |
| bond->params.updelay * bond->params.miimon)) |
| goto nla_put_failure; |
| |
| if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY, |
| bond->params.downdelay * bond->params.miimon)) |
| goto nla_put_failure; |
| |
| if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, bond->params.use_carrier)) |
| goto nla_put_failure; |
| |
| if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval)) |
| goto nla_put_failure; |
| |
| targets = nla_nest_start(skb, IFLA_BOND_ARP_IP_TARGET); |
| if (!targets) |
| goto nla_put_failure; |
| |
| targets_added = 0; |
| for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) { |
| if (bond->params.arp_targets[i]) { |
| nla_put_u32(skb, i, bond->params.arp_targets[i]); |
| targets_added = 1; |
| } |
| } |
| |
| if (targets_added) |
| nla_nest_end(skb, targets); |
| else |
| nla_nest_cancel(skb, targets); |
| |
| if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, bond->params.arp_validate)) |
| goto nla_put_failure; |
| |
| if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS, |
| bond->params.arp_all_targets)) |
| goto nla_put_failure; |
| |
| return 0; |
| |
| nla_put_failure: |
| return -EMSGSIZE; |
| } |
| |
| struct rtnl_link_ops bond_link_ops __read_mostly = { |
| .kind = "bond", |
| .priv_size = sizeof(struct bonding), |
| .setup = bond_setup, |
| .maxtype = IFLA_BOND_MAX, |
| .policy = bond_policy, |
| .validate = bond_validate, |
| .newlink = bond_newlink, |
| .changelink = bond_changelink, |
| .get_size = bond_get_size, |
| .fill_info = bond_fill_info, |
| .get_num_tx_queues = bond_get_num_tx_queues, |
| .get_num_rx_queues = bond_get_num_tx_queues, /* Use the same number |
| as for TX queues */ |
| }; |
| |
| int __init bond_netlink_init(void) |
| { |
| return rtnl_link_register(&bond_link_ops); |
| } |
| |
| void bond_netlink_fini(void) |
| { |
| rtnl_link_unregister(&bond_link_ops); |
| } |
| |
| MODULE_ALIAS_RTNL_LINK("bond"); |