2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
33 #include <linux/module.h>
34 #include <linux/sched/signal.h>
36 #include <linux/init.h>
37 #include <linux/seq_file.h>
39 #include <linux/uaccess.h>
43 static ssize_t show_parent(struct device *d, struct device_attribute *attr,
46 struct net_device *dev = to_net_dev(d);
47 struct ipoib_dev_priv *priv = ipoib_priv(dev);
49 return sprintf(buf, "%s\n", priv->parent->name);
51 static DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL);
54 * NOTE: If this function fails then the priv->dev will remain valid, however
55 * priv can have been freed and must not be touched by caller in the error
58 * If (ndev->reg_state == NETREG_UNINITIALIZED) then it is up to the caller to
59 * free the net_device (just as rtnl_newlink does) otherwise the net_device
60 * will be freed when the rtnl is unlocked.
62 int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv,
65 struct net_device *ndev = priv->dev;
70 priv->parent = ppriv->dev;
72 priv->child_type = type;
74 /* We do not need to touch priv if register_netdevice fails */
75 ndev->priv_destructor = ipoib_intf_free;
77 result = register_netdevice(ndev);
79 ipoib_warn(priv, "failed to initialize; error %i", result);
82 * register_netdevice sometimes calls priv_destructor,
83 * sometimes not. Make sure it was done.
85 if (ndev->priv_destructor)
86 ndev->priv_destructor(ndev);
90 /* RTNL childs don't need proprietary sysfs entries */
91 if (type == IPOIB_LEGACY_CHILD) {
92 if (ipoib_cm_add_mode_attr(ndev))
94 if (ipoib_add_pkey_attr(ndev))
96 if (ipoib_add_umcast_attr(ndev))
99 if (device_create_file(&ndev->dev, &dev_attr_parent))
103 list_add_tail(&priv->list, &ppriv->child_intfs);
108 unregister_netdevice(priv->dev);
112 int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
114 struct ipoib_dev_priv *ppriv, *priv;
115 char intf_name[IFNAMSIZ];
116 struct net_device *ndev;
117 struct ipoib_dev_priv *tpriv;
120 if (!capable(CAP_NET_ADMIN))
123 ppriv = ipoib_priv(pdev);
125 snprintf(intf_name, sizeof(intf_name), "%s.%04x",
126 ppriv->dev->name, pkey);
128 if (!mutex_trylock(&ppriv->sysfs_mutex))
129 return restart_syscall();
131 if (!rtnl_trylock()) {
132 mutex_unlock(&ppriv->sysfs_mutex);
133 return restart_syscall();
136 if (pdev->reg_state != NETREG_REGISTERED) {
138 mutex_unlock(&ppriv->sysfs_mutex);
142 if (!down_write_trylock(&ppriv->vlan_rwsem)) {
144 mutex_unlock(&ppriv->sysfs_mutex);
145 return restart_syscall();
149 * First ensure this isn't a duplicate. We check the parent device and
150 * then all of the legacy child interfaces to make sure the Pkey
153 if (ppriv->pkey == pkey) {
158 list_for_each_entry(tpriv, &ppriv->child_intfs, list) {
159 if (tpriv->pkey == pkey &&
160 tpriv->child_type == IPOIB_LEGACY_CHILD) {
166 priv = ipoib_intf_alloc(ppriv->ca, ppriv->port, intf_name);
173 result = __ipoib_vlan_add(ppriv, priv, pkey, IPOIB_LEGACY_CHILD);
175 if (result && ndev->reg_state == NETREG_UNINITIALIZED)
179 up_write(&ppriv->vlan_rwsem);
181 mutex_unlock(&ppriv->sysfs_mutex);
186 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
188 struct ipoib_dev_priv *ppriv, *priv, *tpriv;
189 struct net_device *dev = NULL;
191 if (!capable(CAP_NET_ADMIN))
194 ppriv = ipoib_priv(pdev);
196 if (!mutex_trylock(&ppriv->sysfs_mutex))
197 return restart_syscall();
199 if (!rtnl_trylock()) {
200 mutex_unlock(&ppriv->sysfs_mutex);
201 return restart_syscall();
204 if (pdev->reg_state != NETREG_REGISTERED) {
206 mutex_unlock(&ppriv->sysfs_mutex);
210 if (!down_write_trylock(&ppriv->vlan_rwsem)) {
212 mutex_unlock(&ppriv->sysfs_mutex);
213 return restart_syscall();
216 list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
217 if (priv->pkey == pkey &&
218 priv->child_type == IPOIB_LEGACY_CHILD) {
219 list_del(&priv->list);
224 up_write(&ppriv->vlan_rwsem);
227 ipoib_dbg(ppriv, "delete child vlan %s\n", dev->name);
228 unregister_netdevice(dev);
232 mutex_unlock(&ppriv->sysfs_mutex);
234 return (dev) ? 0 : -ENODEV;