1 /* 2 * drivers/net/bond/bond_netlink.c - Netlink interface for bonding 3 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 */ 10 11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 12 13 #include <linux/module.h> 14 #include <linux/errno.h> 15 #include <linux/netdevice.h> 16 #include <linux/etherdevice.h> 17 #include <linux/if_link.h> 18 #include <linux/if_ether.h> 19 #include <net/netlink.h> 20 #include <net/rtnetlink.h> 21 #include "bonding.h" 22 23 static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = { 24 [IFLA_BOND_MODE] = { .type = NLA_U8 }, 25 }; 26 27 static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) 28 { 29 if (tb[IFLA_ADDRESS]) { 30 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 31 return -EINVAL; 32 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 33 return -EADDRNOTAVAIL; 34 } 35 return 0; 36 } 37 38 static int bond_changelink(struct net_device *bond_dev, 39 struct nlattr *tb[], struct nlattr *data[]) 40 { 41 struct bonding *bond = netdev_priv(bond_dev); 42 int err; 43 44 if (data && data[IFLA_BOND_MODE]) { 45 int mode = nla_get_u8(data[IFLA_BOND_MODE]); 46 47 err = bond_option_mode_set(bond, mode); 48 if (err) 49 return err; 50 } 51 return 0; 52 } 53 54 static int bond_newlink(struct net *src_net, struct net_device *bond_dev, 55 struct nlattr *tb[], struct nlattr *data[]) 56 { 57 int err; 58 59 err = bond_changelink(bond_dev, tb, data); 60 if (err < 0) 61 return err; 62 63 return register_netdevice(bond_dev); 64 } 65 66 static size_t bond_get_size(const struct net_device *bond_dev) 67 { 68 return nla_total_size(sizeof(u8)); /* IFLA_BOND_MODE */ 69 } 70 71 static int bond_fill_info(struct sk_buff *skb, 72 const struct net_device *bond_dev) 73 { 74 struct bonding *bond = netdev_priv(bond_dev); 75 76 if (nla_put_u8(skb, IFLA_BOND_MODE, bond->params.mode)) 77 goto nla_put_failure; 78 return 0; 79 80 nla_put_failure: 81 return -EMSGSIZE; 82 } 83 84 struct rtnl_link_ops bond_link_ops __read_mostly = { 85 .kind = "bond", 86 .priv_size = sizeof(struct bonding), 87 .setup = bond_setup, 88 .maxtype = IFLA_BOND_MAX, 89 .policy = bond_policy, 90 .validate = bond_validate, 91 .newlink = bond_newlink, 92 .changelink = bond_changelink, 93 .get_size = bond_get_size, 94 .fill_info = bond_fill_info, 95 .get_num_tx_queues = bond_get_num_tx_queues, 96 .get_num_rx_queues = bond_get_num_tx_queues, /* Use the same number 97 as for TX queues */ 98 }; 99 100 int __init bond_netlink_init(void) 101 { 102 return rtnl_link_register(&bond_link_ops); 103 } 104 105 void __exit bond_netlink_fini(void) 106 { 107 rtnl_link_unregister(&bond_link_ops); 108 } 109 110 MODULE_ALIAS_RTNL_LINK("bond"); 111