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 ifnet *dev = to_net_dev(d);
47	struct ipoib_dev_priv *priv = dev->if_softc;
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 ifnet *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 = pdev->if_softc;
63
64	rtnl_lock();
65	mutex_lock(&ppriv->vlan_mutex);
66
67	/*
68	 * First ensure this isn't a duplicate. We check the parent device and
69	 * then all of the child interfaces to make sure the Pkey doesn't match.
70	 */
71	if (ppriv->pkey == pkey) {
72		result = -ENOTUNIQ;
73		priv = NULL;
74		goto err;
75	}
76
77	list_for_each_entry(priv, &ppriv->child_intfs, list) {
78		if (priv->pkey == pkey) {
79			result = -ENOTUNIQ;
80			priv = NULL;
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	priv->max_ib_mtu = ppriv->max_ib_mtu;
94	/* MTU will be reset when mcast join happens */
95	priv->dev->mtu   = IPOIB_UD_MTU(priv->max_ib_mtu);
96	priv->mcast_mtu  = priv->admin_mtu = priv->dev->mtu;
97	set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
98
99	result = ipoib_set_dev_features(priv, ppriv->ca);
100	if (result)
101		goto err;
102
103	priv->pkey = pkey;
104
105	memcpy(IF_LLADDR(priv->dev), ppriv->dev->dev_addr, INFINIBAND_ALEN);
106	priv->broadcastaddr[8] = pkey >> 8;
107	priv->broadcastaddr[9] = pkey & 0xff;
108
109	result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port);
110	if (result < 0) {
111		ipoib_warn(ppriv, "failed to initialize subinterface: "
112			   "device %s, port %d",
113			   ppriv->ca->name, ppriv->port);
114		goto err;
115	}
116
117	result = register_netdevice(priv->dev);
118	if (result) {
119		ipoib_warn(priv, "failed to initialize; error %i", result);
120		goto register_failed;
121	}
122
123	priv->parent = ppriv->dev;
124
125	ipoib_create_debug_files(priv->dev);
126
127	if (ipoib_cm_add_mode_attr(priv->dev))
128		goto sysfs_failed;
129	if (ipoib_add_pkey_attr(priv->dev))
130		goto sysfs_failed;
131	if (ipoib_add_umcast_attr(priv->dev))
132		goto sysfs_failed;
133
134	if (device_create_file(&priv->dev->dev, &dev_attr_parent))
135		goto sysfs_failed;
136
137	list_add_tail(&priv->list, &ppriv->child_intfs);
138
139	mutex_unlock(&ppriv->vlan_mutex);
140	rtnl_unlock();
141
142	return 0;
143
144sysfs_failed:
145	ipoib_delete_debug_files(priv->dev);
146	unregister_netdevice(priv->dev);
147
148register_failed:
149	ipoib_dev_cleanup(priv->dev);
150
151err:
152	mutex_unlock(&ppriv->vlan_mutex);
153	rtnl_unlock();
154	if (priv)
155		free_netdev(priv->dev);
156
157	return result;
158}
159
160int ipoib_vlan_delete(struct ifnet *pdev, unsigned short pkey)
161{
162	struct ipoib_dev_priv *ppriv, *priv, *tpriv;
163	struct ifnet *dev = NULL;
164
165	if (!capable(CAP_NET_ADMIN))
166		return -EPERM;
167
168	ppriv = pdev->if_softc;
169
170	rtnl_lock();
171	mutex_lock(&ppriv->vlan_mutex);
172	list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
173		if (priv->pkey == pkey) {
174			unregister_netdevice(priv->dev);
175			ipoib_dev_cleanup(priv->dev);
176			list_del(&priv->list);
177			dev = priv->dev;
178			break;
179		}
180	}
181	mutex_unlock(&ppriv->vlan_mutex);
182	rtnl_unlock();
183
184	if (dev) {
185		free_netdev(dev);
186		return 0;
187	}
188
189	return -ENODEV;
190}
191