ipoib_vlan.c revision 83bb63f62bda28be88b21216fbb59838a10f2348 
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
43static 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}
51static DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL);
52
53int 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
140sysfs_failed:
141	ipoib_delete_debug_files(priv->dev);
142	unregister_netdev(priv->dev);
143
144register_failed:
145	ipoib_dev_cleanup(priv->dev);
146
147device_init_failed:
148	free_netdev(priv->dev);
149
150err:
151	mutex_unlock(&ppriv->vlan_mutex);
152	return result;
153}
154
155int 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