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
43 static 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 }
51 static DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL);
52
53 int 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 if (!rtnl_trylock())
65 return restart_syscall();
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 priv = NULL;
75 goto err;
76 }
77
78 list_for_each_entry(priv, &ppriv->child_intfs, list) {
79 if (priv->pkey == pkey) {
80 result = -ENOTUNIQ;
81 priv = NULL;
82 goto err;
83 }
84 }
85
86 snprintf(intf_name, sizeof intf_name, "%s.%04x",
87 ppriv->dev->name, pkey);
88 priv = ipoib_intf_alloc(intf_name);
89 if (!priv) {
90 result = -ENOMEM;
91 goto err;
92 }
93
94 priv->max_ib_mtu = ppriv->max_ib_mtu;
95 /* MTU will be reset when mcast join happens */
96 priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
97 priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu;
98 set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
99
100 result = ipoib_set_dev_features(priv, ppriv->ca);
101 if (result)
102 goto err;
103
104 priv->pkey = pkey;
105
106 memcpy(priv->dev->dev_addr, ppriv->dev->dev_addr, INFINIBAND_ALEN);
107 priv->dev->broadcast[8] = pkey >> 8;
108 priv->dev->broadcast[9] = pkey & 0xff;
109
110 result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port);
111 if (result < 0) {
112 ipoib_warn(ppriv, "failed to initialize subinterface: "
113 "device %s, port %d",
114 ppriv->ca->name, ppriv->port);
115 goto err;
116 }
117
118 result = register_netdevice(priv->dev);
119 if (result) {
120 ipoib_warn(priv, "failed to initialize; error %i", result);
121 goto register_failed;
122 }
123
124 priv->parent = ppriv->dev;
125
126 ipoib_create_debug_files(priv->dev);
127
128 if (ipoib_cm_add_mode_attr(priv->dev))
129 goto sysfs_failed;
130 if (ipoib_add_pkey_attr(priv->dev))
131 goto sysfs_failed;
132 if (ipoib_add_umcast_attr(priv->dev))
133 goto sysfs_failed;
134
135 if (device_create_file(&priv->dev->dev, &dev_attr_parent))
136 goto sysfs_failed;
137
138 list_add_tail(&priv->list, &ppriv->child_intfs);
139
140 mutex_unlock(&ppriv->vlan_mutex);
141 rtnl_unlock();
142
143 return 0;
144
145 sysfs_failed:
146 ipoib_delete_debug_files(priv->dev);
147 unregister_netdevice(priv->dev);
148
149 register_failed:
150 ipoib_dev_cleanup(priv->dev);
151
152 err:
153 mutex_unlock(&ppriv->vlan_mutex);
154 rtnl_unlock();
155 if (priv)
156 free_netdev(priv->dev);
157
158 return result;
159 }
160
161 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey)
162 {
163 struct ipoib_dev_priv *ppriv, *priv, *tpriv;
164 struct net_device *dev = NULL;
165
166 if (!capable(CAP_NET_ADMIN))
167 return -EPERM;
168
169 ppriv = netdev_priv(pdev);
170
171 if (!rtnl_trylock())
172 return restart_syscall();
173 mutex_lock(&ppriv->vlan_mutex);
174 list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
175 if (priv->pkey == pkey) {
176 unregister_netdevice(priv->dev);
177 ipoib_dev_cleanup(priv->dev);
178 list_del(&priv->list);
179 dev = priv->dev;
180 break;
181 }
182 }
183 mutex_unlock(&ppriv->vlan_mutex);
184 rtnl_unlock();
185
186 if (dev) {
187 free_netdev(dev);
188 return 0;
189 }
190
191 return -ENODEV;
192 }
193
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