1 /* 2 * Copyright (c) 2004 Topspin Communications. 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/module.h> 34 35 #include <linux/init.h> 36 #include <linux/seq_file.h> 37 38 #include <asm/uaccess.h> 39 40 #include "ipoib.h" 41 42 static ssize_t show_parent(struct device *d, struct device_attribute *attr, 43 char *buf) 44 { 45 struct net_device *dev = to_net_dev(d); 46 struct ipoib_dev_priv *priv = netdev_priv(dev); 47 48 return sprintf(buf, "%s\n", priv->parent->name); 49 } 50 static DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL); 51 52 int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv, 53 u16 pkey, int type) 54 { 55 int result; 56 57 priv->max_ib_mtu = ppriv->max_ib_mtu; 58 /* MTU will be reset when mcast join happens */ 59 priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); 60 priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu; 61 set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags); 62 63 result = ipoib_set_dev_features(priv, ppriv->ca); 64 if (result) 65 goto err; 66 67 priv->pkey = pkey; 68 69 memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN); 70 priv->dev->broadcast[8] = pkey >> 8; 71 priv->dev->broadcast[9] = pkey & 0xff; 72 73 result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port); 74 if (result < 0) { 75 ipoib_warn(ppriv, "failed to initialize subinterface: " 76 "device %s, port %d", 77 ppriv->ca->name, ppriv->port); 78 goto err; 79 } 80 81 result = register_netdevice(priv->dev); 82 if (result) { 83 ipoib_warn(priv, "failed to initialize; error %i", result); 84 goto register_failed; 85 } 86 87 priv->parent = ppriv->dev; 88 89 ipoib_create_debug_files(priv->dev); 90 91 /* RTNL childs don't need proprietary sysfs entries */ 92 if (type == IPOIB_LEGACY_CHILD) { 93 if (ipoib_cm_add_mode_attr(priv->dev)) 94 goto sysfs_failed; 95 if (ipoib_add_pkey_attr(priv->dev)) 96 goto sysfs_failed; 97 if (ipoib_add_umcast_attr(priv->dev)) 98 goto sysfs_failed; 99 100 if (device_create_file(&priv->dev->dev, &dev_attr_parent)) 101 goto sysfs_failed; 102 } 103 104 priv->child_type = type; 105 list_add_tail(&priv->list, &ppriv->child_intfs); 106 107 return 0; 108 109 sysfs_failed: 110 result = -ENOMEM; 111 ipoib_delete_debug_files(priv->dev); 112 unregister_netdevice(priv->dev); 113 114 register_failed: 115 ipoib_dev_cleanup(priv->dev); 116 117 err: 118 return result; 119 } 120 121 int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey) 122 { 123 struct ipoib_dev_priv *ppriv, *priv; 124 char intf_name[IFNAMSIZ]; 125 struct ipoib_dev_priv *tpriv; 126 int result; 127 128 if (!capable(CAP_NET_ADMIN)) 129 return -EPERM; 130 131 ppriv = netdev_priv(pdev); 132 133 snprintf(intf_name, sizeof intf_name, "%s.%04x", 134 ppriv->dev->name, pkey); 135 priv = ipoib_intf_alloc(intf_name); 136 if (!priv) 137 return -ENOMEM; 138 139 if (!rtnl_trylock()) 140 return restart_syscall(); 141 142 down_write(&ppriv->vlan_rwsem); 143 144 /* 145 * First ensure this isn't a duplicate. We check the parent device and 146 * then all of the legacy child interfaces to make sure the Pkey 147 * doesn't match. 148 */ 149 if (ppriv->pkey == pkey) { 150 result = -ENOTUNIQ; 151 goto out; 152 } 153 154 list_for_each_entry(tpriv, &ppriv->child_intfs, list) { 155 if (tpriv->pkey == pkey && 156 tpriv->child_type == IPOIB_LEGACY_CHILD) { 157 result = -ENOTUNIQ; 158 goto out; 159 } 160 } 161 162 result = __ipoib_vlan_add(ppriv, priv, pkey, IPOIB_LEGACY_CHILD); 163 164 out: 165 up_write(&ppriv->vlan_rwsem); 166 167 if (result) 168 free_netdev(priv->dev); 169 170 rtnl_unlock(); 171 172 return result; 173 } 174 175 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey) 176 { 177 struct ipoib_dev_priv *ppriv, *priv, *tpriv; 178 struct net_device *dev = NULL; 179 180 if (!capable(CAP_NET_ADMIN)) 181 return -EPERM; 182 183 ppriv = netdev_priv(pdev); 184 185 if (!rtnl_trylock()) 186 return restart_syscall(); 187 188 down_write(&ppriv->vlan_rwsem); 189 list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) { 190 if (priv->pkey == pkey && 191 priv->child_type == IPOIB_LEGACY_CHILD) { 192 unregister_netdevice(priv->dev); 193 list_del(&priv->list); 194 dev = priv->dev; 195 break; 196 } 197 } 198 up_write(&ppriv->vlan_rwsem); 199 200 rtnl_unlock(); 201 202 if (dev) { 203 free_netdev(dev); 204 return 0; 205 } 206 207 return -ENODEV; 208 } 209