200 lines · c
1/*2 * Copyright (c) 2012 Mellanox Technologies. - All rights reserved.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * provided with the distribution.22 *23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * SOFTWARE.31 */32 33#include <linux/netdevice.h>34#include <linux/if_arp.h> /* For ARPHRD_xxx */35#include <net/rtnetlink.h>36#include "ipoib.h"37 38static const struct nla_policy ipoib_policy[IFLA_IPOIB_MAX + 1] = {39 [IFLA_IPOIB_PKEY] = { .type = NLA_U16 },40 [IFLA_IPOIB_MODE] = { .type = NLA_U16 },41 [IFLA_IPOIB_UMCAST] = { .type = NLA_U16 },42};43 44static unsigned int ipoib_get_max_num_queues(void)45{46 return min_t(unsigned int, num_possible_cpus(), 128);47}48 49static int ipoib_fill_info(struct sk_buff *skb, const struct net_device *dev)50{51 struct ipoib_dev_priv *priv = ipoib_priv(dev);52 u16 val;53 54 if (nla_put_u16(skb, IFLA_IPOIB_PKEY, priv->pkey))55 goto nla_put_failure;56 57 val = test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);58 if (nla_put_u16(skb, IFLA_IPOIB_MODE, val))59 goto nla_put_failure;60 61 val = test_bit(IPOIB_FLAG_UMCAST, &priv->flags);62 if (nla_put_u16(skb, IFLA_IPOIB_UMCAST, val))63 goto nla_put_failure;64 65 return 0;66 67nla_put_failure:68 return -EMSGSIZE;69}70 71static int ipoib_changelink(struct net_device *dev, struct nlattr *tb[],72 struct nlattr *data[],73 struct netlink_ext_ack *extack)74{75 u16 mode, umcast;76 int ret = 0;77 78 if (data[IFLA_IPOIB_MODE]) {79 mode = nla_get_u16(data[IFLA_IPOIB_MODE]);80 if (mode == IPOIB_MODE_DATAGRAM)81 ret = ipoib_set_mode(dev, "datagram\n");82 else if (mode == IPOIB_MODE_CONNECTED)83 ret = ipoib_set_mode(dev, "connected\n");84 else85 ret = -EINVAL;86 87 if (ret < 0)88 goto out_err;89 }90 91 if (data[IFLA_IPOIB_UMCAST]) {92 umcast = nla_get_u16(data[IFLA_IPOIB_UMCAST]);93 ipoib_set_umcast(dev, umcast);94 }95 96out_err:97 return ret;98}99 100static int ipoib_new_child_link(struct net *src_net, struct net_device *dev,101 struct nlattr *tb[], struct nlattr *data[],102 struct netlink_ext_ack *extack)103{104 struct net_device *pdev;105 struct ipoib_dev_priv *ppriv;106 u16 child_pkey;107 int err;108 109 if (!tb[IFLA_LINK])110 return -EINVAL;111 112 pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));113 if (!pdev || pdev->type != ARPHRD_INFINIBAND)114 return -ENODEV;115 116 ppriv = ipoib_priv(pdev);117 118 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &ppriv->flags)) {119 ipoib_warn(ppriv, "child creation disallowed for child devices\n");120 return -EINVAL;121 }122 123 if (!data || !data[IFLA_IPOIB_PKEY]) {124 ipoib_dbg(ppriv, "no pkey specified, using parent pkey\n");125 child_pkey = ppriv->pkey;126 } else127 child_pkey = nla_get_u16(data[IFLA_IPOIB_PKEY]);128 129 err = ipoib_intf_init(ppriv->ca, ppriv->port, dev->name, dev);130 if (err) {131 ipoib_warn(ppriv, "failed to initialize pkey device\n");132 return err;133 }134 135 err = __ipoib_vlan_add(ppriv, ipoib_priv(dev),136 child_pkey, IPOIB_RTNL_CHILD);137 if (err)138 return err;139 140 if (data) {141 err = ipoib_changelink(dev, tb, data, extack);142 if (err) {143 unregister_netdevice(dev);144 return err;145 }146 }147 148 return 0;149}150 151static void ipoib_del_child_link(struct net_device *dev, struct list_head *head)152{153 struct ipoib_dev_priv *priv = ipoib_priv(dev);154 155 if (!priv->parent)156 return;157 158 unregister_netdevice_queue(dev, head);159}160 161static size_t ipoib_get_size(const struct net_device *dev)162{163 return nla_total_size(2) + /* IFLA_IPOIB_PKEY */164 nla_total_size(2) + /* IFLA_IPOIB_MODE */165 nla_total_size(2); /* IFLA_IPOIB_UMCAST */166}167 168static struct rtnl_link_ops ipoib_link_ops __read_mostly = {169 .kind = "ipoib",170 .netns_refund = true,171 .maxtype = IFLA_IPOIB_MAX,172 .policy = ipoib_policy,173 .priv_size = sizeof(struct ipoib_dev_priv),174 .setup = ipoib_setup_common,175 .newlink = ipoib_new_child_link,176 .dellink = ipoib_del_child_link,177 .changelink = ipoib_changelink,178 .get_size = ipoib_get_size,179 .fill_info = ipoib_fill_info,180 .get_num_rx_queues = ipoib_get_max_num_queues,181 .get_num_tx_queues = ipoib_get_max_num_queues,182};183 184struct rtnl_link_ops *ipoib_get_link_ops(void)185{186 return &ipoib_link_ops;187}188 189int __init ipoib_netlink_init(void)190{191 return rtnl_link_register(&ipoib_link_ops);192}193 194void __exit ipoib_netlink_fini(void)195{196 rtnl_link_unregister(&ipoib_link_ops);197}198 199MODULE_ALIAS_RTNL_LINK("ipoib");200