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/module.h> 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 = netdev_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, 67 struct nlattr *tb[], struct nlattr *data[]) 68 { 69 u16 mode, umcast; 70 int ret = 0; 71 72 if (data[IFLA_IPOIB_MODE]) { 73 mode = nla_get_u16(data[IFLA_IPOIB_MODE]); 74 if (mode == IPOIB_MODE_DATAGRAM) 75 ret = ipoib_set_mode(dev, "datagram\n"); 76 else if (mode == IPOIB_MODE_CONNECTED) 77 ret = ipoib_set_mode(dev, "connected\n"); 78 else 79 ret = -EINVAL; 80 81 if (ret < 0) 82 goto out_err; 83 } 84 85 if (data[IFLA_IPOIB_UMCAST]) { 86 umcast = nla_get_u16(data[IFLA_IPOIB_UMCAST]); 87 ipoib_set_umcast(dev, umcast); 88 } 89 90 out_err: 91 return ret; 92 } 93 94 static int ipoib_new_child_link(struct net *src_net, struct net_device *dev, 95 struct nlattr *tb[], struct nlattr *data[]) 96 { 97 struct net_device *pdev; 98 struct ipoib_dev_priv *ppriv; 99 u16 child_pkey; 100 int err; 101 102 if (!tb[IFLA_LINK]) 103 return -EINVAL; 104 105 pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); 106 if (!pdev) 107 return -ENODEV; 108 109 ppriv = netdev_priv(pdev); 110 111 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &ppriv->flags)) { 112 ipoib_warn(ppriv, "child creation disallowed for child devices\n"); 113 return -EINVAL; 114 } 115 116 if (!data || !data[IFLA_IPOIB_PKEY]) { 117 ipoib_dbg(ppriv, "no pkey specified, using parent pkey\n"); 118 child_pkey = ppriv->pkey; 119 } else 120 child_pkey = nla_get_u16(data[IFLA_IPOIB_PKEY]); 121 122 if (child_pkey == 0 || child_pkey == 0x8000) 123 return -EINVAL; 124 125 /* 126 * Set the full membership bit, so that we join the right 127 * broadcast group, etc. 128 */ 129 child_pkey |= 0x8000; 130 131 err = __ipoib_vlan_add(ppriv, netdev_priv(dev), child_pkey, IPOIB_RTNL_CHILD); 132 133 if (!err && data) 134 err = ipoib_changelink(dev, tb, data); 135 return err; 136 } 137 138 static void ipoib_unregister_child_dev(struct net_device *dev, struct list_head *head) 139 { 140 struct ipoib_dev_priv *priv, *ppriv; 141 142 priv = netdev_priv(dev); 143 ppriv = netdev_priv(priv->parent); 144 145 down_write(&ppriv->vlan_rwsem); 146 unregister_netdevice_queue(dev, head); 147 list_del(&priv->list); 148 up_write(&ppriv->vlan_rwsem); 149 } 150 151 static size_t ipoib_get_size(const struct net_device *dev) 152 { 153 return nla_total_size(2) + /* IFLA_IPOIB_PKEY */ 154 nla_total_size(2) + /* IFLA_IPOIB_MODE */ 155 nla_total_size(2); /* IFLA_IPOIB_UMCAST */ 156 } 157 158 static struct rtnl_link_ops ipoib_link_ops __read_mostly = { 159 .kind = "ipoib", 160 .maxtype = IFLA_IPOIB_MAX, 161 .policy = ipoib_policy, 162 .priv_size = sizeof(struct ipoib_dev_priv), 163 .setup = ipoib_setup, 164 .newlink = ipoib_new_child_link, 165 .changelink = ipoib_changelink, 166 .dellink = ipoib_unregister_child_dev, 167 .get_size = ipoib_get_size, 168 .fill_info = ipoib_fill_info, 169 }; 170 171 int __init ipoib_netlink_init(void) 172 { 173 return rtnl_link_register(&ipoib_link_ops); 174 } 175 176 void __exit ipoib_netlink_fini(void) 177 { 178 rtnl_link_unregister(&ipoib_link_ops); 179 } 180 181 MODULE_ALIAS_RTNL_LINK("ipoib"); 182