1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright (c) 2004 Topspin Communications. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35 #include <sys/cdefs.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
show_parent(struct device * d,struct device_attribute * attr,char * buf)46 static ssize_t show_parent(struct device *d, struct device_attribute *attr,
47 char *buf)
48 {
49 if_t dev = to_net_dev(d);
50 struct ipoib_dev_priv *priv = dev->if_softc;
51
52 return sprintf(buf, "%s\n", priv->parent->name);
53 }
54 static DEVICE_ATTR(parent, S_IRUGO, show_parent, NULL);
55
ipoib_vlan_add(if_t pdev,unsigned short pkey)56 int ipoib_vlan_add(if_t 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 = pdev->if_softc;
66
67 rtnl_lock();
68 mutex_lock(&ppriv->vlan_mutex);
69
70 /*
71 * First ensure this isn't a duplicate. We check the parent device and
72 * then all of the child interfaces to make sure the Pkey doesn't match.
73 */
74 if (ppriv->pkey == pkey) {
75 result = -ENOTUNIQ;
76 priv = NULL;
77 goto err;
78 }
79
80 list_for_each_entry(priv, &ppriv->child_intfs, list) {
81 if (priv->pkey == pkey) {
82 result = -ENOTUNIQ;
83 priv = NULL;
84 goto err;
85 }
86 }
87
88 snprintf(intf_name, sizeof intf_name, "%s.%04x",
89 ppriv->dev->name, pkey);
90 priv = ipoib_intf_alloc(intf_name, ppriv->ca);
91 if (!priv) {
92 result = -ENOMEM;
93 goto err;
94 }
95
96 priv->max_ib_mtu = ppriv->max_ib_mtu;
97 /* MTU will be reset when mcast join happens */
98 priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
99 priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu;
100 set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
101
102 result = ipoib_set_dev_features(priv, ppriv->ca);
103 if (result)
104 goto err;
105
106 priv->pkey = pkey;
107
108 memcpy(if_getlladdr(priv->dev), ppriv->dev->dev_addr, INFINIBAND_ALEN);
109 priv->broadcastaddr[8] = pkey >> 8;
110 priv->broadcastaddr[9] = pkey & 0xff;
111
112 result = ipoib_dev_init(priv->dev, ppriv->ca, ppriv->port);
113 if (result < 0) {
114 ipoib_warn(ppriv, "failed to initialize subinterface: "
115 "device %s, port %d",
116 ppriv->ca->name, ppriv->port);
117 goto err;
118 }
119
120 result = register_netdevice(priv->dev);
121 if (result) {
122 ipoib_warn(priv, "failed to initialize; error %i", result);
123 goto register_failed;
124 }
125
126 priv->parent = ppriv->dev;
127
128 ipoib_create_debug_files(priv->dev);
129
130 if (ipoib_cm_add_mode_attr(priv->dev))
131 goto sysfs_failed;
132 if (ipoib_add_pkey_attr(priv->dev))
133 goto sysfs_failed;
134 if (ipoib_add_umcast_attr(priv->dev))
135 goto sysfs_failed;
136
137 if (device_create_file(&priv->dev->dev, &dev_attr_parent))
138 goto sysfs_failed;
139
140 list_add_tail(&priv->list, &ppriv->child_intfs);
141
142 mutex_unlock(&ppriv->vlan_mutex);
143 rtnl_unlock();
144
145 return 0;
146
147 sysfs_failed:
148 ipoib_delete_debug_files(priv->dev);
149 unregister_netdevice(priv->dev);
150
151 register_failed:
152 ipoib_dev_cleanup(priv->dev);
153
154 err:
155 mutex_unlock(&ppriv->vlan_mutex);
156 rtnl_unlock();
157 if (priv)
158 free_netdev(priv->dev);
159
160 return result;
161 }
162
ipoib_vlan_delete(if_t pdev,unsigned short pkey)163 int ipoib_vlan_delete(if_t pdev, unsigned short pkey)
164 {
165 struct ipoib_dev_priv *ppriv, *priv, *tpriv;
166 if_t dev = NULL;
167
168 if (!capable(CAP_NET_ADMIN))
169 return -EPERM;
170
171 ppriv = pdev->if_softc;
172
173 rtnl_lock();
174 mutex_lock(&ppriv->vlan_mutex);
175 list_for_each_entry_safe(priv, tpriv, &ppriv->child_intfs, list) {
176 if (priv->pkey == pkey) {
177 unregister_netdevice(priv->dev);
178 ipoib_dev_cleanup(priv->dev);
179 list_del(&priv->list);
180 dev = priv->dev;
181 break;
182 }
183 }
184 mutex_unlock(&ppriv->vlan_mutex);
185 rtnl_unlock();
186
187 if (dev) {
188 free_netdev(dev);
189 return 0;
190 }
191
192 return -ENODEV;
193 }
194