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