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, struct nlattr *tb[], 68 struct nlattr *data[], 69 struct netlink_ext_ack *extack) 70 { 71 u16 mode, umcast; 72 int ret = 0; 73 74 if (data[IFLA_IPOIB_MODE]) { 75 mode = nla_get_u16(data[IFLA_IPOIB_MODE]); 76 if (mode == IPOIB_MODE_DATAGRAM) 77 ret = ipoib_set_mode(dev, "datagram\n"); 78 else if (mode == IPOIB_MODE_CONNECTED) 79 ret = ipoib_set_mode(dev, "connected\n"); 80 else 81 ret = -EINVAL; 82 83 if (ret < 0) 84 goto out_err; 85 } 86 87 if (data[IFLA_IPOIB_UMCAST]) { 88 umcast = nla_get_u16(data[IFLA_IPOIB_UMCAST]); 89 ipoib_set_umcast(dev, umcast); 90 } 91 92 out_err: 93 return ret; 94 } 95 96 static int ipoib_new_child_link(struct net *src_net, struct net_device *dev, 97 struct nlattr *tb[], struct nlattr *data[], 98 struct netlink_ext_ack *extack) 99 { 100 struct net_device *pdev; 101 struct ipoib_dev_priv *ppriv; 102 u16 child_pkey; 103 int err; 104 105 if (!tb[IFLA_LINK]) 106 return -EINVAL; 107 108 pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); 109 if (!pdev || pdev->type != ARPHRD_INFINIBAND) 110 return -ENODEV; 111 112 ppriv = ipoib_priv(pdev); 113 114 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &ppriv->flags)) { 115 ipoib_warn(ppriv, "child creation disallowed for child devices\n"); 116 return -EINVAL; 117 } 118 119 if (!data || !data[IFLA_IPOIB_PKEY]) { 120 ipoib_dbg(ppriv, "no pkey specified, using parent pkey\n"); 121 child_pkey = ppriv->pkey; 122 } else 123 child_pkey = nla_get_u16(data[IFLA_IPOIB_PKEY]); 124 125 if (child_pkey == 0 || child_pkey == 0x8000) 126 return -EINVAL; 127 128 /* 129 * Set the full membership bit, so that we join the right 130 * broadcast group, etc. 131 */ 132 child_pkey |= 0x8000; 133 134 err = __ipoib_vlan_add(ppriv, ipoib_priv(dev), 135 child_pkey, IPOIB_RTNL_CHILD); 136 137 if (!err && data) 138 err = ipoib_changelink(dev, tb, data, extack); 139 return err; 140 } 141 142 static void ipoib_unregister_child_dev(struct net_device *dev, struct list_head *head) 143 { 144 struct ipoib_dev_priv *priv, *ppriv; 145 146 priv = ipoib_priv(dev); 147 ppriv = ipoib_priv(priv->parent); 148 149 down_write(&ppriv->vlan_rwsem); 150 unregister_netdevice_queue(dev, head); 151 list_del(&priv->list); 152 up_write(&ppriv->vlan_rwsem); 153 } 154 155 static size_t ipoib_get_size(const struct net_device *dev) 156 { 157 return nla_total_size(2) + /* IFLA_IPOIB_PKEY */ 158 nla_total_size(2) + /* IFLA_IPOIB_MODE */ 159 nla_total_size(2); /* IFLA_IPOIB_UMCAST */ 160 } 161 162 static struct rtnl_link_ops ipoib_link_ops __read_mostly = { 163 .kind = "ipoib", 164 .maxtype = IFLA_IPOIB_MAX, 165 .policy = ipoib_policy, 166 .priv_size = sizeof(struct ipoib_dev_priv), 167 .setup = ipoib_setup_common, 168 .newlink = ipoib_new_child_link, 169 .changelink = ipoib_changelink, 170 .dellink = ipoib_unregister_child_dev, 171 .get_size = ipoib_get_size, 172 .fill_info = ipoib_fill_info, 173 }; 174 175 int __init ipoib_netlink_init(void) 176 { 177 return rtnl_link_register(&ipoib_link_ops); 178 } 179 180 void __exit ipoib_netlink_fini(void) 181 { 182 rtnl_link_unregister(&ipoib_link_ops); 183 } 184 185 MODULE_ALIAS_RTNL_LINK("ipoib"); 186