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 mutex_lock(&ppriv->vlan_mutex); 65 66 /* 67 * First ensure this isn't a duplicate. We check the parent device and 68 * then all of the child interfaces to make sure the Pkey doesn't match. 69 */ 70 if (ppriv->pkey == pkey) { 71 result = -ENOTUNIQ; 72 goto err; 73 } 74 75 list_for_each_entry(priv, &ppriv->child_intfs, list) { 76 if (priv->pkey == pkey) { 77 result = -ENOTUNIQ; 78 goto err; 79 } 80 } 81 82 snprintf(intf_name, sizeof intf_name, "%s.%04x", 83 ppriv->dev->name, pkey); 84 priv = ipoib_intf_alloc(intf_name); 85 if (!priv) { 86 result = -ENOMEM; 87 goto err; 88 } 89 90 priv->max_ib_mtu = ppriv->max_ib_mtu; 91 /* MTU will be reset when mcast join happens */ 92 priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); 93 priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu; 94 set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags); 95 96 result = ipoib_set_dev_features(priv, ppriv->ca); 97 if (result) 98 goto device_init_failed; 99 100 priv->pkey = pkey; 101 102 memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN); 103 priv->dev->broadcast[8] = pkey >> 8; 104 priv->dev->broadcast[9] = pkey & 0xff; 105 106 result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port); 107 if (result < 0) { 108 ipoib_warn(ppriv, "failed to initialize subinterface: " 109 "device %s, port %d", 110 ppriv->ca->name, ppriv->port); 111 goto device_init_failed; 112 } 113 114 result = register_netdev(priv->dev); 115 if (result) { 116 ipoib_warn(priv, "failed to initialize; error %i", result); 117 goto register_failed; 118 } 119 120 priv->parent = ppriv->dev; 121 122 ipoib_create_debug_files(priv->dev); 123 124 if (ipoib_cm_add_mode_attr(priv->dev)) 125 goto sysfs_failed; 126 if (ipoib_add_pkey_attr(priv->dev)) 127 goto sysfs_failed; 128 if (ipoib_add_umcast_attr(priv->dev)) 129 goto sysfs_failed; 130 131 if (device_create_file(&priv->dev->dev, &dev_attr_parent)) 132 goto sysfs_failed; 133 134 list_add_tail(&priv->list, &ppriv->child_intfs); 135 136 mutex_unlock(&ppriv->vlan_mutex); 137 138 return 0; 139 140 sysfs_failed: 141 ipoib_delete_debug_files(priv->dev); 142 unregister_netdev(priv->dev); 143 144 register_failed: 145 ipoib_dev_cleanup(priv->dev); 146 147 device_init_failed: 148 free_netdev(priv->dev); 149 150 err: 151 mutex_unlock(&ppriv->vlan_mutex); 152 return result; 153 } 154 155 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey) 156 { 157 struct ipoib_dev_priv *ppriv, *priv, *tpriv; 158 int ret = -ENOENT; 159 160 if (!capable(CAP_NET_ADMIN)) 161 return -EPERM; 162 163 ppriv = netdev_priv(pdev); 164 165 mutex_lock(&ppriv->vlan_mutex); 166 list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) { 167 if (priv->pkey == pkey) { 168 unregister_netdev(priv->dev); 169 ipoib_dev_cleanup(priv->dev); 170 list_del(&priv->list); 171 free_netdev(priv->dev); 172 173 ret = 0; 174 break; 175 } 176 } 177 mutex_unlock(&ppriv->vlan_mutex); 178 179 return ret; 180 } 181