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 unsigned int ipoib_get_max_num_queues(void) 45 { 46 return min_t(unsigned int, num_possible_cpus(), 128); 47 } 48 49 static 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 67 nla_put_failure: 68 return -EMSGSIZE; 69 } 70 71 static 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 else 85 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 96 out_err: 97 return ret; 98 } 99 100 static 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 } else 127 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 } 150 151 static 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 } 160 161 static 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 } 167 168 static 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 }; 183 184 struct rtnl_link_ops *ipoib_get_link_ops(void) 185 { 186 return &ipoib_link_ops; 187 } 188 189 int __init ipoib_netlink_init(void) 190 { 191 return rtnl_link_register(&ipoib_link_ops); 192 } 193 194 void __exit ipoib_netlink_fini(void) 195 { 196 rtnl_link_unregister(&ipoib_link_ops); 197 } 198 199 MODULE_ALIAS_RTNL_LINK("ipoib"); 200