ipoib_vlan.c revision 5941d079f2c3bdf0dffed1afb8941678fcd0bcb7 
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/module.h>
36
37#include <linux/init.h>
38#include <linux/slab.h>
39#include <linux/seq_file.h>
40
41#include <asm/uaccess.h>
42
43#include "ipoib.h"
44
45static ssize_t show_parent(struct class_device *class_dev, char *buf)
46{
47	struct net_device *dev =
48		container_of(class_dev, struct net_device, class_dev);
49	struct ipoib_dev_priv *priv = netdev_priv(dev);
50
51	return sprintf(buf, "%s\n", priv->parent->name);
52}
53static CLASS_DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL);
54
55int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey)
56{
57	struct ipoib_dev_priv *ppriv, *priv;
58	char intf_name[IFNAMSIZ];
59	int result;
60
61	if (!capable(CAP_NET_ADMIN))
62		return -EPERM;
63
64	ppriv = netdev_priv(pdev);
65
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		goto err;
75	}
76
77	list_for_each_entry(priv, &ppriv->child_intfs, list) {
78		if (priv->pkey == pkey) {
79			result = -ENOTUNIQ;
80			goto err;
81		}
82	}
83
84	snprintf(intf_name, sizeof intf_name, "%s.%04x",
85		 ppriv->dev->name, pkey);
86	priv = ipoib_intf_alloc(intf_name);
87	if (!priv) {
88		result = -ENOMEM;
89		goto err;
90	}
91
92	set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
93
94	priv->pkey = pkey;
95
96	memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN);
97	priv->dev->broadcast[8] = pkey >> 8;
98	priv->dev->broadcast[9] = pkey & 0xff;
99
100	result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port);
101	if (result < 0) {
102		ipoib_warn(ppriv, "failed to initialize subinterface: "
103			   "device %s, port %d",
104			   ppriv->ca->name, ppriv->port);
105		goto device_init_failed;
106	}
107
108	result = register_netdev(priv->dev);
109	if (result) {
110		ipoib_warn(priv, "failed to initialize; error %i", result);
111		goto register_failed;
112	}
113
114	priv->parent = ppriv->dev;
115
116	ipoib_create_debug_files(priv->dev);
117
118	if (ipoib_add_pkey_attr(priv->dev))
119		goto sysfs_failed;
120
121	if (class_device_create_file(&priv->dev->class_dev,
122				     &class_device_attr_parent))
123		goto sysfs_failed;
124
125	list_add_tail(&priv->list, &ppriv->child_intfs);
126
127	mutex_unlock(&ppriv->vlan_mutex);
128
129	return 0;
130
131sysfs_failed:
132	ipoib_delete_debug_files(priv->dev);
133	unregister_netdev(priv->dev);
134
135register_failed:
136	ipoib_dev_cleanup(priv->dev);
137
138device_init_failed:
139	free_netdev(priv->dev);
140
141err:
142	mutex_unlock(&ppriv->vlan_mutex);
143	return result;
144}
145
146int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
147{
148	struct ipoib_dev_priv *ppriv, *priv, *tpriv;
149	int ret = -ENOENT;
150
151	if (!capable(CAP_NET_ADMIN))
152		return -EPERM;
153
154	ppriv = netdev_priv(pdev);
155
156	mutex_lock(&ppriv->vlan_mutex);
157	list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
158		if (priv->pkey == pkey) {
159			unregister_netdev(priv->dev);
160			ipoib_dev_cleanup(priv->dev);
161			list_del(&priv->list);
162			free_netdev(priv->dev);
163
164			ret = 0;
165			break;
166		}
167	}
168	mutex_unlock(&ppriv->vlan_mutex);
169
170	return ret;
171}
172