1 /* 2 * Copyright (c) 2012 Mellanox Technologies. - All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * 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 OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * 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 38 static 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 44 static int ipoib_fill_info(struct sk_buff *skb, const struct net_device *dev) 45 { 46 struct ipoib_dev_priv *priv = ipoib_priv(dev); 47 u16 val; 48 49 if (nla_put_u16(skb, IFLA_IPOIB_PKEY, priv->pkey)) 50 goto nla_put_failure; 51 52 val = test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); 53 if (nla_put_u16(skb, IFLA_IPOIB_MODE, val)) 54 goto nla_put_failure; 55 56 val = test_bit(IPOIB_FLAG_UMCAST, &priv->flags); 57 if (nla_put_u16(skb, IFLA_IPOIB_UMCAST, val)) 58 goto nla_put_failure; 59 60 return 0; 61 62 nla_put_failure: 63 return -EMSGSIZE; 64 } 65 66 static int ipoib_changelink(struct net_device *dev, struct nlattr *tb[], 67 struct nlattr *data[], 68 struct netlink_ext_ack *extack) 69 { 70 u16 mode, umcast; 71 int ret = 0; 72 73 if (data[IFLA_IPOIB_MODE]) { 74 mode = nla_get_u16(data[IFLA_IPOIB_MODE]); 75 if (mode == IPOIB_MODE_DATAGRAM) 76 ret = ipoib_set_mode(dev, "datagram\n"); 77 else if (mode == IPOIB_MODE_CONNECTED) 78 ret = ipoib_set_mode(dev, "connected\n"); 79 else 80 ret = -EINVAL; 81 82 if (ret < 0) 83 goto out_err; 84 } 85 86 if (data[IFLA_IPOIB_UMCAST]) { 87 umcast = nla_get_u16(data[IFLA_IPOIB_UMCAST]); 88 ipoib_set_umcast(dev, umcast); 89 } 90 91 out_err: 92 return ret; 93 } 94 95 static int ipoib_new_child_link(struct net *src_net, struct net_device *dev, 96 struct nlattr *tb[], struct nlattr *data[], 97 struct netlink_ext_ack *extack) 98 { 99 struct net_device *pdev; 100 struct ipoib_dev_priv *ppriv; 101 u16 child_pkey; 102 int err; 103 104 if (!tb[IFLA_LINK]) 105 return -EINVAL; 106 107 pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); 108 if (!pdev || pdev->type != ARPHRD_INFINIBAND) 109 return -ENODEV; 110 111 ppriv = ipoib_priv(pdev); 112 113 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &ppriv->flags)) { 114 ipoib_warn(ppriv, "child creation disallowed for child devices\n"); 115 return -EINVAL; 116 } 117 118 if (!data || !data[IFLA_IPOIB_PKEY]) { 119 ipoib_dbg(ppriv, "no pkey specified, using parent pkey\n"); 120 child_pkey = ppriv->pkey; 121 } else 122 child_pkey = nla_get_u16(data[IFLA_IPOIB_PKEY]); 123 124 err = ipoib_intf_init(ppriv->ca, ppriv->port, dev->name, dev); 125 if (err) { 126 ipoib_warn(ppriv, "failed to initialize pkey device\n"); 127 return err; 128 } 129 130 err = __ipoib_vlan_add(ppriv, ipoib_priv(dev), 131 child_pkey, IPOIB_RTNL_CHILD); 132 if (err) 133 return err; 134 135 if (data) { 136 err = ipoib_changelink(dev, tb, data, extack); 137 if (err) { 138 unregister_netdevice(dev); 139 return err; 140 } 141 } 142 143 return 0; 144 } 145 146 static void ipoib_del_child_link(struct net_device *dev, struct list_head *head) 147 { 148 struct ipoib_dev_priv *priv = ipoib_priv(dev); 149 150 if (!priv->parent) 151 return; 152 153 unregister_netdevice_queue(dev, head); 154 } 155 156 static size_t ipoib_get_size(const struct net_device *dev) 157 { 158 return nla_total_size(2) + /* IFLA_IPOIB_PKEY */ 159 nla_total_size(2) + /* IFLA_IPOIB_MODE */ 160 nla_total_size(2); /* IFLA_IPOIB_UMCAST */ 161 } 162 163 static struct rtnl_link_ops ipoib_link_ops __read_mostly = { 164 .kind = "ipoib", 165 .netns_refund = true, 166 .maxtype = IFLA_IPOIB_MAX, 167 .policy = ipoib_policy, 168 .priv_size = sizeof(struct ipoib_dev_priv), 169 .setup = ipoib_setup_common, 170 .newlink = ipoib_new_child_link, 171 .dellink = ipoib_del_child_link, 172 .changelink = ipoib_changelink, 173 .get_size = ipoib_get_size, 174 .fill_info = ipoib_fill_info, 175 }; 176 177 struct rtnl_link_ops *ipoib_get_link_ops(void) 178 { 179 return &ipoib_link_ops; 180 } 181 182 int __init ipoib_netlink_init(void) 183 { 184 return rtnl_link_register(&ipoib_link_ops); 185 } 186 187 void __exit ipoib_netlink_fini(void) 188 { 189 rtnl_link_unregister(&ipoib_link_ops); 190 } 191 192 MODULE_ALIAS_RTNL_LINK("ipoib"); 193