1 /* 2 * drivers/net/bond/bond_netlink.c - Netlink interface for bonding 3 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> 4 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11 12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 13 14 #include <linux/module.h> 15 #include <linux/errno.h> 16 #include <linux/netdevice.h> 17 #include <linux/etherdevice.h> 18 #include <linux/if_link.h> 19 #include <linux/if_ether.h> 20 #include <net/netlink.h> 21 #include <net/rtnetlink.h> 22 #include "bonding.h" 23 24 static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = { 25 [IFLA_BOND_MODE] = { .type = NLA_U8 }, 26 [IFLA_BOND_ACTIVE_SLAVE] = { .type = NLA_U32 }, 27 [IFLA_BOND_MIIMON] = { .type = NLA_U32 }, 28 [IFLA_BOND_UPDELAY] = { .type = NLA_U32 }, 29 [IFLA_BOND_DOWNDELAY] = { .type = NLA_U32 }, 30 }; 31 32 static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) 33 { 34 if (tb[IFLA_ADDRESS]) { 35 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 36 return -EINVAL; 37 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 38 return -EADDRNOTAVAIL; 39 } 40 return 0; 41 } 42 43 static int bond_changelink(struct net_device *bond_dev, 44 struct nlattr *tb[], struct nlattr *data[]) 45 { 46 struct bonding *bond = netdev_priv(bond_dev); 47 int err; 48 49 if (!data) 50 return 0; 51 52 if (data[IFLA_BOND_MODE]) { 53 int mode = nla_get_u8(data[IFLA_BOND_MODE]); 54 55 err = bond_option_mode_set(bond, mode); 56 if (err) 57 return err; 58 } 59 if (data[IFLA_BOND_ACTIVE_SLAVE]) { 60 int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]); 61 struct net_device *slave_dev; 62 63 if (ifindex == 0) { 64 slave_dev = NULL; 65 } else { 66 slave_dev = __dev_get_by_index(dev_net(bond_dev), 67 ifindex); 68 if (!slave_dev) 69 return -ENODEV; 70 } 71 err = bond_option_active_slave_set(bond, slave_dev); 72 if (err) 73 return err; 74 } 75 if (data[IFLA_BOND_MIIMON]) { 76 int miimon = nla_get_u32(data[IFLA_BOND_MIIMON]); 77 78 err = bond_option_miimon_set(bond, miimon); 79 if (err) 80 return err; 81 } 82 if (data[IFLA_BOND_UPDELAY]) { 83 int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]); 84 85 err = bond_option_updelay_set(bond, updelay); 86 if (err) 87 return err; 88 } 89 if (data[IFLA_BOND_DOWNDELAY]) { 90 int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]); 91 92 err = bond_option_downdelay_set(bond, downdelay); 93 if (err) 94 return err; 95 } 96 return 0; 97 } 98 99 static int bond_newlink(struct net *src_net, struct net_device *bond_dev, 100 struct nlattr *tb[], struct nlattr *data[]) 101 { 102 int err; 103 104 err = bond_changelink(bond_dev, tb, data); 105 if (err < 0) 106 return err; 107 108 return register_netdevice(bond_dev); 109 } 110 111 static size_t bond_get_size(const struct net_device *bond_dev) 112 { 113 return nla_total_size(sizeof(u8)) + /* IFLA_BOND_MODE */ 114 nla_total_size(sizeof(u32)) + /* IFLA_BOND_ACTIVE_SLAVE */ 115 nla_total_size(sizeof(u32)) + /* IFLA_BOND_MIIMON */ 116 nla_total_size(sizeof(u32)) + /* IFLA_BOND_UPDELAY */ 117 nla_total_size(sizeof(u32)) + /* IFLA_BOND_DOWNDELAY */ 118 0; 119 } 120 121 static int bond_fill_info(struct sk_buff *skb, 122 const struct net_device *bond_dev) 123 { 124 struct bonding *bond = netdev_priv(bond_dev); 125 struct net_device *slave_dev = bond_option_active_slave_get(bond); 126 127 if (nla_put_u8(skb, IFLA_BOND_MODE, bond->params.mode)) 128 goto nla_put_failure; 129 130 if (slave_dev && 131 nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, slave_dev->ifindex)) 132 goto nla_put_failure; 133 134 if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon)) 135 goto nla_put_failure; 136 137 if (nla_put_u32(skb, IFLA_BOND_UPDELAY, 138 bond->params.updelay * bond->params.miimon)) 139 goto nla_put_failure; 140 141 if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY, 142 bond->params.downdelay * bond->params.miimon)) 143 goto nla_put_failure; 144 145 return 0; 146 147 nla_put_failure: 148 return -EMSGSIZE; 149 } 150 151 struct rtnl_link_ops bond_link_ops __read_mostly = { 152 .kind = "bond", 153 .priv_size = sizeof(struct bonding), 154 .setup = bond_setup, 155 .maxtype = IFLA_BOND_MAX, 156 .policy = bond_policy, 157 .validate = bond_validate, 158 .newlink = bond_newlink, 159 .changelink = bond_changelink, 160 .get_size = bond_get_size, 161 .fill_info = bond_fill_info, 162 .get_num_tx_queues = bond_get_num_tx_queues, 163 .get_num_rx_queues = bond_get_num_tx_queues, /* Use the same number 164 as for TX queues */ 165 }; 166 167 int __init bond_netlink_init(void) 168 { 169 return rtnl_link_register(&bond_link_ops); 170 } 171 172 void bond_netlink_fini(void) 173 { 174 rtnl_link_unregister(&bond_link_ops); 175 } 176 177 MODULE_ALIAS_RTNL_LINK("bond"); 178