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 <linux/module.h> 36 #include <net/rtnetlink.h> 37 #include "ipoib.h" 38 39 static const struct nla_policy ipoib_policy[IFLA_IPOIB_MAX + 1] = { 40 [IFLA_IPOIB_PKEY] = { .type = NLA_U16 }, 41 [IFLA_IPOIB_MODE] = { .type = NLA_U16 }, 42 [IFLA_IPOIB_UMCAST] = { .type = NLA_U16 }, 43 }; 44 45 static int ipoib_fill_info(struct sk_buff *skb, const struct net_device *dev) 46 { 47 struct ipoib_dev_priv *priv = ipoib_priv(dev); 48 u16 val; 49 50 if (nla_put_u16(skb, IFLA_IPOIB_PKEY, priv->pkey)) 51 goto nla_put_failure; 52 53 val = test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); 54 if (nla_put_u16(skb, IFLA_IPOIB_MODE, val)) 55 goto nla_put_failure; 56 57 val = test_bit(IPOIB_FLAG_UMCAST, &priv->flags); 58 if (nla_put_u16(skb, IFLA_IPOIB_UMCAST, val)) 59 goto nla_put_failure; 60 61 return 0; 62 63 nla_put_failure: 64 return -EMSGSIZE; 65 } 66 67 static int ipoib_changelink(struct net_device *dev, 68 struct nlattr *tb[], struct nlattr *data[]) 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 { 98 struct net_device *pdev; 99 struct ipoib_dev_priv *ppriv; 100 u16 child_pkey; 101 int err; 102 103 if (!tb[IFLA_LINK]) 104 return -EINVAL; 105 106 pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); 107 if (!pdev || pdev->type != ARPHRD_INFINIBAND) 108 return -ENODEV; 109 110 ppriv = ipoib_priv(pdev); 111 112 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &ppriv->flags)) { 113 ipoib_warn(ppriv, "child creation disallowed for child devices\n"); 114 return -EINVAL; 115 } 116 117 if (!data || !data[IFLA_IPOIB_PKEY]) { 118 ipoib_dbg(ppriv, "no pkey specified, using parent pkey\n"); 119 child_pkey = ppriv->pkey; 120 } else 121 child_pkey = nla_get_u16(data[IFLA_IPOIB_PKEY]); 122 123 if (child_pkey == 0 || child_pkey == 0x8000) 124 return -EINVAL; 125 126 /* 127 * Set the full membership bit, so that we join the right 128 * broadcast group, etc. 129 */ 130 child_pkey |= 0x8000; 131 132 err = __ipoib_vlan_add(ppriv, ipoib_priv(dev), 133 child_pkey, IPOIB_RTNL_CHILD); 134 135 if (!err && data) 136 err = ipoib_changelink(dev, tb, data); 137 return err; 138 } 139 140 static void ipoib_unregister_child_dev(struct net_device *dev, struct list_head *head) 141 { 142 struct ipoib_dev_priv *priv, *ppriv; 143 144 priv = ipoib_priv(dev); 145 ppriv = ipoib_priv(priv->parent); 146 147 down_write(&ppriv->vlan_rwsem); 148 unregister_netdevice_queue(dev, head); 149 list_del(&priv->list); 150 up_write(&ppriv->vlan_rwsem); 151 } 152 153 static size_t ipoib_get_size(const struct net_device *dev) 154 { 155 return nla_total_size(2) + /* IFLA_IPOIB_PKEY */ 156 nla_total_size(2) + /* IFLA_IPOIB_MODE */ 157 nla_total_size(2); /* IFLA_IPOIB_UMCAST */ 158 } 159 160 static struct rtnl_link_ops ipoib_link_ops __read_mostly = { 161 .kind = "ipoib", 162 .maxtype = IFLA_IPOIB_MAX, 163 .policy = ipoib_policy, 164 .priv_size = sizeof(struct ipoib_dev_priv), 165 .setup = ipoib_setup_common, 166 .newlink = ipoib_new_child_link, 167 .changelink = ipoib_changelink, 168 .dellink = ipoib_unregister_child_dev, 169 .get_size = ipoib_get_size, 170 .fill_info = ipoib_fill_info, 171 }; 172 173 int __init ipoib_netlink_init(void) 174 { 175 return rtnl_link_register(&ipoib_link_ops); 176 } 177 178 void __exit ipoib_netlink_fini(void) 179 { 180 rtnl_link_unregister(&ipoib_link_ops); 181 } 182 183 MODULE_ALIAS_RTNL_LINK("ipoib"); 184