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Jiri Pirko says: ==================== bonding: introduce bonding options Netlink support This patchset basically allows "mode" and "active_slave" bonding options to be propagated and set up via standart RT Netlink interface. In future other options can be easily added as well. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| /* | ||
| * drivers/net/bond/bond_netlink.c - Netlink interface for bonding | ||
| * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> | ||
| * | ||
| * 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 | ||
|
|
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| #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" | ||
|
|
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| static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = { | ||
| [IFLA_BOND_MODE] = { .type = NLA_U8 }, | ||
| [IFLA_BOND_ACTIVE_SLAVE] = { .type = NLA_U32 }, | ||
| }; | ||
|
|
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| 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; | ||
| } | ||
|
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| static int bond_changelink(struct net_device *bond_dev, | ||
| struct nlattr *tb[], struct nlattr *data[]) | ||
| { | ||
| struct bonding *bond = netdev_priv(bond_dev); | ||
| int err; | ||
|
|
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| if (data && data[IFLA_BOND_MODE]) { | ||
| int mode = nla_get_u8(data[IFLA_BOND_MODE]); | ||
|
|
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| err = bond_option_mode_set(bond, mode); | ||
| if (err) | ||
| return err; | ||
| } | ||
| if (data && 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; | ||
| } | ||
| return 0; | ||
| } | ||
|
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| static int bond_newlink(struct net *src_net, struct net_device *bond_dev, | ||
| struct nlattr *tb[], struct nlattr *data[]) | ||
| { | ||
| int err; | ||
|
|
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| err = bond_changelink(bond_dev, tb, data); | ||
| if (err < 0) | ||
| return err; | ||
|
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| return register_netdevice(bond_dev); | ||
| } | ||
|
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| 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 */ | ||
| } | ||
|
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| 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); | ||
|
|
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| if (nla_put_u8(skb, IFLA_BOND_MODE, bond->params.mode) || | ||
| (slave_dev && | ||
| nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, slave_dev->ifindex))) | ||
| goto nla_put_failure; | ||
| return 0; | ||
|
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| nla_put_failure: | ||
| return -EMSGSIZE; | ||
| } | ||
|
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| 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 */ | ||
| }; | ||
|
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| int __init bond_netlink_init(void) | ||
| { | ||
| return rtnl_link_register(&bond_link_ops); | ||
| } | ||
|
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| void __exit bond_netlink_fini(void) | ||
| { | ||
| rtnl_link_unregister(&bond_link_ops); | ||
| } | ||
|
|
||
| MODULE_ALIAS_RTNL_LINK("bond"); |
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