ipoib_vlan.c revision 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 
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 * $Id: ipoib_vlan.c 1349 2004-12-16 21:09:43Z roland $
33 */
34
35#include <linux/version.h>
36#include <linux/module.h>
37
38#include <linux/init.h>
39#include <linux/slab.h>
40#include <linux/seq_file.h>
41
42#include <asm/uaccess.h>
43
44#include "ipoib.h"
45
46static ssize_t show_parent(struct class_device *class_dev, char *buf)
47{
48	struct net_device *dev =
49		container_of(class_dev, struct net_device, class_dev);
50	struct ipoib_dev_priv *priv = netdev_priv(dev);
51
52	return sprintf(buf, "%s\n", priv->parent->name);
53}
54static CLASS_DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL);
55
56int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
57{
58	struct ipoib_dev_priv *ppriv, *priv;
59	char intf_name[IFNAMSIZ];
60	int result;
61
62	if (!capable(CAP_NET_ADMIN))
63		return -EPERM;
64
65	ppriv = netdev_priv(pdev);
66
67	down(&ppriv->vlan_mutex);
68
69	/*
70	 * First ensure this isn't a duplicate. We check the parent device and
71	 * then all of the child interfaces to make sure the Pkey doesn't match.
72	 */
73	if (ppriv->pkey == pkey) {
74		result = -ENOTUNIQ;
75		goto err;
76	}
77
78	list_for_each_entry(priv, &ppriv->child_intfs, list) {
79		if (priv->pkey == pkey) {
80			result = -ENOTUNIQ;
81			goto err;
82		}
83	}
84
85	snprintf(intf_name, sizeof intf_name, "%s.%04x",
86		 ppriv->dev->name, pkey);
87	priv = ipoib_intf_alloc(intf_name);
88	if (!priv) {
89		result = -ENOMEM;
90		goto err;
91	}
92
93	set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
94
95	priv->pkey = pkey;
96
97	memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN);
98	priv->dev->broadcast[8] = pkey >> 8;
99	priv->dev->broadcast[9] = pkey & 0xff;
100
101	result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port);
102	if (result < 0) {
103		ipoib_warn(ppriv, "failed to initialize subinterface: "
104			   "device %s, port %d",
105			   ppriv->ca->name, ppriv->port);
106		goto device_init_failed;
107	}
108
109	result = register_netdev(priv->dev);
110	if (result) {
111		ipoib_warn(priv, "failed to initialize; error %i", result);
112		goto register_failed;
113	}
114
115	priv->parent = ppriv->dev;
116
117	if (ipoib_create_debug_file(priv->dev))
118		goto debug_failed;
119
120	if (ipoib_add_pkey_attr(priv->dev))
121		goto sysfs_failed;
122
123	if (class_device_create_file(&priv->dev->class_dev,
124				     &class_device_attr_parent))
125		goto sysfs_failed;
126
127	list_add_tail(&priv->list, &ppriv->child_intfs);
128
129	up(&ppriv->vlan_mutex);
130
131	return 0;
132
133sysfs_failed:
134	ipoib_delete_debug_file(priv->dev);
135
136debug_failed:
137	unregister_netdev(priv->dev);
138
139register_failed:
140	ipoib_dev_cleanup(priv->dev);
141
142device_init_failed:
143	free_netdev(priv->dev);
144
145err:
146	up(&ppriv->vlan_mutex);
147	return result;
148}
149
150int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
151{
152	struct ipoib_dev_priv *ppriv, *priv, *tpriv;
153	int ret = -ENOENT;
154
155	if (!capable(CAP_NET_ADMIN))
156		return -EPERM;
157
158	ppriv = netdev_priv(pdev);
159
160	down(&ppriv->vlan_mutex);
161	list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
162		if (priv->pkey == pkey) {
163			unregister_netdev(priv->dev);
164			ipoib_dev_cleanup(priv->dev);
165
166			list_del(&priv->list);
167
168			kfree(priv);
169
170			ret = 0;
171			break;
172		}
173	}
174	up(&ppriv->vlan_mutex);
175
176	return ret;
177}
178