| 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 | priv->dev->iflink = ppriv->dev->ifindex; |
| 106 | list_add_tail(&priv->list, &ppriv->child_intfs); |
| 107 | |
| 108 | return 0; |
| 109 | |
| 110 | sysfs_failed: |
| 111 | result = -ENOMEM; |
| 112 | ipoib_delete_debug_files(priv->dev); |
| 113 | unregister_netdevice(priv->dev); |
| 114 | |
| 115 | register_failed: |
| 116 | ipoib_dev_cleanup(priv->dev); |
| 117 | |
| 118 | err: |
| 119 | return result; |
| 120 | } |
| 121 | |
| 122 | int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey) |
| 123 | { |
| 124 | struct ipoib_dev_priv *ppriv, *priv; |
| 125 | char intf_name[IFNAMSIZ]; |
| 126 | struct ipoib_dev_priv *tpriv; |
| 127 | int result; |
| 128 | |
| 129 | if (!capable(CAP_NET_ADMIN)) |
| 130 | return -EPERM; |
| 131 | |
| 132 | ppriv = netdev_priv(pdev); |
| 133 | |
| 134 | snprintf(intf_name, sizeof intf_name, "%s.%04x", |
| 135 | ppriv->dev->name, pkey); |
| 136 | priv = ipoib_intf_alloc(intf_name); |
| 137 | if (!priv) |
| 138 | return -ENOMEM; |
| 139 | |
| 140 | if (!rtnl_trylock()) |
| 141 | return restart_syscall(); |
| 142 | |
| 143 | mutex_lock(&ppriv->vlan_mutex); |
| 144 | |
| 145 | /* |
| 146 | * First ensure this isn't a duplicate. We check the parent device and |
| 147 | * then all of the legacy child interfaces to make sure the Pkey |
| 148 | * doesn't match. |
| 149 | */ |
| 150 | if (ppriv->pkey == pkey) { |
| 151 | result = -ENOTUNIQ; |
| 152 | goto out; |
| 153 | } |
| 154 | |
| 155 | list_for_each_entry(tpriv, &ppriv->child_intfs, list) { |
| 156 | if (tpriv->pkey == pkey && |
| 157 | tpriv->child_type == IPOIB_LEGACY_CHILD) { |
| 158 | result = -ENOTUNIQ; |
| 159 | goto out; |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | result = __ipoib_vlan_add(ppriv, priv, pkey, IPOIB_LEGACY_CHILD); |
| 164 | |
| 165 | out: |
| 166 | mutex_unlock(&ppriv->vlan_mutex); |
| 167 | |
| 168 | if (result) |
| 169 | free_netdev(priv->dev); |
| 170 | |
| 171 | rtnl_unlock(); |
| 172 | |
| 173 | return result; |
| 174 | } |
| 175 | |
| 176 | int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey) |
| 177 | { |
| 178 | struct ipoib_dev_priv *ppriv, *priv, *tpriv; |
| 179 | struct net_device *dev = NULL; |
| 180 | |
| 181 | if (!capable(CAP_NET_ADMIN)) |
| 182 | return -EPERM; |
| 183 | |
| 184 | ppriv = netdev_priv(pdev); |
| 185 | |
| 186 | if (!rtnl_trylock()) |
| 187 | return restart_syscall(); |
| 188 | mutex_lock(&ppriv->vlan_mutex); |
| 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 | mutex_unlock(&ppriv->vlan_mutex); |
| 199 | rtnl_unlock(); |
| 200 | |
| 201 | if (dev) { |
| 202 | free_netdev(dev); |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | return -ENODEV; |
| 207 | } |